Method, device, terminal and storage medium for identifying water intrusion layer

Abstract

The present application provides a method, device, terminal and storage medium for identifying water-invaded layers, belonging to the field of oil development technology. The method includes: based on reservoir detection data in the original period and the development period, respectively determining the first logging curves of the target reservoir in the original period and the development period, the target reservoir includes multiple reservoir blocks, and the first logging curve includes the first intersection curve of natural gamma and resistivity of each reservoir block; based on the first intersection curve of the target reservoir in the original period, determining the target reservoir block, the minimum value of the natural gamma and the maximum value of the resistivity of the target reservoir block are in a symmetrical state, and the target reservoir block is determined as a gas layer; determining the resistivity change parameter of the gas layer from at least one of the first intersection curve of the gas layer in the development period, the resistivity histogram, and the resistivity trend diagram; if the resistivity change parameter is used to indicate that the resistivity state of the gas layer has changed, determining the gas layer as a water-invaded layer, the method improves the accuracy of identifying the water-invaded layer.

Description

Technical Field

[0001] The present application relates to the technical field of oil development, and in particular to a method, device, terminal and storage medium for identifying a water invasion layer. Background Art

[0002] In the middle and late stages of gas field development, the gas layers in the reservoir will be invaded by edge and bottom water and transformed into water-invaded layers, which will lead to a decrease in gas well production capacity, gas well recovery rate and gas field development benefits. Therefore, when developing a gas field, it is necessary not only to identify the gas layers for development, but also to identify the water-invaded layers that the gas layers become after being invaded by water, so as to timely manage the water-invaded layers and thus improve the development efficiency of the gas field.

[0003] In the related art, the acoustic time difference of the reservoir is measured by a logging instrument. When the acoustic time difference of a certain reservoir block in the reservoir is too large or a frequency skipping phenomenon occurs, the reservoir block is determined to be a gas layer. However, since the acoustic time difference of the reservoir block with better physical properties in the reservoir may also be too large, the difference between the acoustic time difference of the gas layer in the reservoir and the reservoir block with better physical properties is not obvious, which makes it easy to produce errors when determining the gas layer by the acoustic time difference, making the determined gas layer inaccurate. When identifying the water-invaded layer, the resistivity of the gas layer is determined by measuring the logging instrument. When the resistivity is lower than the preset value, it is determined that the gas layer is invaded by water; it can be seen that when the gas layer determined by the acoustic time difference is inaccurate, the result of determining whether the gas layer is invaded by water by resistivity is also inaccurate, and thus the water-invaded layer cannot be accurately identified. Summary of the invention

[0004] The embodiments of the present application provide a method, device, terminal and storage medium for identifying a water intrusion layer, which can improve the accuracy of identifying a water intrusion layer. The technical solution is as follows:

[0005] In one aspect, a method for identifying a water intrusion layer is provided, the method comprising:

[0006] Obtain reservoir detection data of the target reservoir to be studied in the original period and the development period;

[0007] Based on the reservoir detection data in the original period and the development period, respectively determine the first well logging curve of the target reservoir in the original period and the development period, the target reservoir includes a plurality of reservoir blocks, and the first well logging curve includes a first intersection curve of natural gamma and resistivity of each reservoir block;

[0008] Based on the first intersection curve of the target reservoir in the original period, a target reservoir block is determined, the minimum value of the natural gamma and the maximum value of the resistivity of the target reservoir block are in a symmetrical state, and the target reservoir block is determined as a gas layer;

[0009] Obtaining a resistivity histogram and a resistivity trend diagram of the gas layer during the development period;

[0010] Determining a resistivity variation parameter of the gas layer from at least one of a first intersection curve, a resistivity histogram, and a resistivity trend graph of the gas layer during the development period;

[0011] If the resistivity change parameter is used to indicate that the resistivity state of the gas layer has changed, it is determined that the gas layer is a water intrusion layer.

[0012] In a possible implementation, the first well logging curve further includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block;

[0013] Determining the resistivity change parameter of the gas layer from at least one of the first intersection curve, the resistivity histogram, and the resistivity trend graph of the gas layer during the development period includes:

[0014] If the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet the first target condition, the gas layer is determined to be a poor gas layer;

[0015] The resistivity variation parameter of the poor gas layer is determined from the resistivity histogram of the poor gas layer during the development period.

[0016] In a possible implementation, the first well logging curve further includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block;

[0017] Determining the resistivity change parameter of the gas layer from at least one of the first intersection curve, the resistivity histogram, and the resistivity trend graph of the gas layer during the development period includes:

[0018] If the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet the second target condition, the gas layer is determined to be a gas-water layer;

[0019] From the resistivity trend diagram of the gas-water layer during the development period, the resistivity change parameter of the gas-water layer is determined.

[0020] In a possible implementation, the first well logging curve further includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block;

[0021] Determining the resistivity change parameter of the gas layer from at least one of the first intersection curve, the resistivity histogram, and the resistivity trend graph of the gas layer during the development period includes:

[0022] If the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet the third target condition, it is determined that the gas layer is a single sand body;

[0023] The resistivity variation parameter of the single sand body is determined from the first intersection curve of the single sand body during the development period.

[0024] In a possible implementation, the reservoir detection data includes well logging data and core data;

[0025] The determining, based on the well logging data of the original period and the development period, respectively the first well logging curves of the target reservoir in the original period and the development period comprises:

[0026] For each period, the core data and well log data of the period are normalized;

[0027] Based on the standardized logging data, drawing a second logging curve of the target reservoir;

[0028] Based on the standardized core data, the second well logging curve is depth corrected to obtain the first well logging curve.

[0029] In a possible implementation, the method further includes:

[0030] Acquire logging interpretation parameters of the water invasion layer, wherein the logging interpretation parameters include at least one of movable water saturation, water-gas ratio, and water invasion thickness ratio;

[0031] Based on the well logging interpretation parameters, the level of the water invasion layer is determined.

[0032] In a possible implementation, the well logging interpretation parameters include movable water saturation, water-gas ratio, and water invasion thickness ratio, and determining the level of the water invasion layer based on the well logging interpretation parameters includes:

[0033] In response to the water-gas ratio being between a first preset water-gas ratio and a second preset water-gas ratio, the movable water saturation being less than the first preset movable water saturation, and the water invasion thickness ratio being less than the first preset ratio, determining that the level of the water invasion layer is first level water invasion, wherein the first preset water-gas ratio is less than the second preset water-gas ratio;

[0034] In response to the water-gas ratio being between the second preset water-gas ratio and the third preset water-gas ratio, the movable water saturation being between the first preset movable water saturation and the second preset movable water saturation, and the water invasion thickness ratio being between the first preset ratio and the second preset ratio, determining that the level of the water invasion layer is the second level of water invasion, wherein the second preset water-gas ratio is less than the third preset water-gas ratio, the first preset movable water saturation is less than the second preset movable water saturation, and the first preset ratio is less than the second preset ratio;

[0035] In response to the water-gas ratio being greater than the third preset water-gas ratio, the movable water saturation being greater than the second preset movable water saturation, and the water invasion thickness ratio being greater than the second preset ratio, the level of the water invasion layer is determined to be third level water invasion.

[0036] In another aspect, a device for identifying a water intrusion layer is provided, the device comprising:

[0037] The first acquisition module is used to acquire reservoir detection data of the target reservoir to be studied in the original period and the development period respectively;

[0038] A first determination module is used to determine the first well logging curve of the target reservoir in the original period and the development period respectively based on the reservoir detection data in the original period and the development period, the target reservoir includes a plurality of reservoir blocks, and the first well logging curve includes a first intersection curve of natural gamma and resistivity of each reservoir block;

[0039] A second determination module is used to determine a target reservoir block based on the first intersection curve of the target reservoir in the original period, wherein the minimum value of natural gamma and the maximum value of resistivity of the target reservoir block are in a symmetrical state, and the target reservoir block is determined as a gas layer;

[0040] A second acquisition module is used to acquire a resistivity histogram and a resistivity trend graph of the gas layer during the development period;

[0041] A third determination module is used to determine the resistivity change parameter of the gas layer from at least one of the first intersection curve, the resistivity histogram, and the resistivity trend graph of the gas layer during the development period;

[0042] The fourth determination module is configured to determine that the gas layer is a water intrusion layer if the resistivity change parameter is used to indicate that the resistivity state of the gas layer has changed.

[0043] In a possible implementation, the first well logging curve further includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block;

[0044] The third determining module comprises:

[0045] A first determination unit is configured to determine that the gas layer is a poor gas layer if the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet a first target condition;

[0046] The second determination unit is used to determine the resistivity change parameter of the poor gas layer from the resistivity histogram of the poor gas layer during the development period.

[0047] In a possible implementation, the first well logging curve further includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block;

[0048] The third determining module comprises:

[0049] a third determination unit, configured to determine that the gas layer is a gas-water layer if the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet a second target condition;

[0050] The fourth determining unit is used to determine the resistivity change parameter of the gas-water layer from the resistivity trend diagram of the gas-water layer during the development period.

[0051] In a possible implementation, the first well logging curve further includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block;

[0052] The third determining module comprises:

[0053] A fifth determination unit, configured to determine that the gas layer is a single sand body if the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet a third target condition;

[0054] The sixth determination unit is used to determine the resistivity change parameter of the single sand body from the first intersection curve of the single sand body in the development period.

[0055] In a possible implementation, the reservoir detection data includes well logging data and core data;

[0056] The first determining module includes:

[0057] A processing unit, for performing standardization processing on the core data and logging data of each period;

[0058] A drawing unit, used for drawing a second logging curve of the target reservoir based on the standardized logging data;

[0059] A correction unit is used to perform depth correction on the second well logging curve based on the standardized core data to obtain the first well logging curve.

[0060] In a possible implementation, the device further includes:

[0061] A third acquisition module is used to acquire the logging interpretation parameters of the water invasion layer, wherein the logging interpretation parameters include at least one of movable water saturation, water-gas ratio, and water invasion thickness ratio;

[0062] The fifth determination module is used to determine the level of the water invasion layer based on the well logging interpretation parameters.

[0063] In a possible implementation, the logging interpretation parameters include movable water saturation, water-gas ratio, and water invasion thickness ratio, and the fifth determination module includes:

[0064] a seventh determining unit, configured to determine that the level of the water intrusion layer is first level water intrusion in response to the water-gas ratio being between a first preset water-gas ratio and a second preset water-gas ratio, the movable water saturation being less than the first preset movable water saturation, and the water intrusion thickness ratio being less than the first preset ratio, wherein the first preset water-gas ratio is less than the second preset water-gas ratio;

[0065] an eighth determining unit, configured to determine that the level of the water intrusion layer is second-level water intrusion in response to the water-gas ratio being between the second preset water-gas ratio and the third preset water-gas ratio, the movable water saturation being between the first preset movable water saturation and the second preset movable water saturation, and the water intrusion thickness ratio being between the first preset ratio and the second preset ratio, wherein the second preset water-gas ratio is less than the third preset water-gas ratio, the first preset movable water saturation is less than the second preset movable water saturation, and the first preset ratio is less than the second preset ratio;

[0066] A ninth determining unit is used to determine that the level of the water intrusion layer is the third level of water intrusion in response to the water-gas ratio being greater than the third preset water-gas ratio, the movable water saturation being greater than the second preset movable water saturation, and the water intrusion thickness ratio being greater than the second preset ratio.

[0067] On the other hand, a terminal is provided, comprising one or more processors and one or more memories, wherein at least one instruction is stored in the one or more memories, and the at least one instruction is loaded and executed by the one or more processors to implement the instructions in the method for determining the water intrusion layer described in any of the above-mentioned implementations.

[0068] On the other hand, a computer-readable storage medium is provided, in which at least one program code is stored. The at least one program code is loaded and executed by a processor to implement the steps in the method for identifying a water intrusion layer described in any of the above implementations.

[0069] On the other hand, a computer program product or a computer program is provided, the computer program product or the computer program comprising a computer program code, the computer program code being stored in a computer-readable storage medium. A processor of a terminal reads the computer program code from the computer-readable storage medium, and the processor executes the computer program code, so that the terminal performs the operations performed by the above-mentioned determination method for identifying a water intrusion layer.

[0070] The beneficial effects of the technical solution provided by the embodiments of the present application include at least:

[0071] An embodiment of the present application provides a method for identifying a water-invaded layer. The method can determine a first intersection curve of natural gamma and resistivity of each reservoir block of the target reservoir in the original period, and then determine the gas layer in the target reservoir through the symmetric state of natural gamma and resistivity in the first intersection curve. In this way, the method determines the gas layer in the target reservoir by combining the two reservoir detection data of natural gamma and resistivity, thereby improving the accuracy of determining the gas layer. Furthermore, by determining the resistivity change parameters of the gas layer in the development period, it is determined whether the gas layer is invaded by water. In this way, whether the gas layer is invaded by water is determined based on the accurately identified gas layer, and the water-invaded layer can be accurately identified, thereby improving the accuracy of identifying the water-invaded layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0073] Figure 1 is a flow chart of a method for identifying a water intrusion layer provided in an embodiment of the present application;

[0074] Figure 2 is a first intersection curve diagram of an air layer provided in an embodiment of the present application;

[0075] Figure 3 is a resistivity histogram provided in an embodiment of the present application;

[0076] Figure 4 is a resistivity curve provided in an embodiment of the present application;

[0077] Figure 5 is a first intersection curve comparison diagram provided in an embodiment of the present application;

[0078] Figure 6 is a well logging interpretation curve diagram provided in an embodiment of the present application;

[0079] Figure 7 It is a resistivity curve comparison diagram provided in an embodiment of the present application;

[0080] Figure 8 is a first intersection curve diagram between multiple wells provided in an embodiment of the present application;

[0081] Fig. 9 is a schematic diagram of a determination device for identifying a water intrusion layer provided in an embodiment of the present application;

[0082] Fig.10 It is a block diagram of a terminal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0083] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0084] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0085] This application provides a method for identifying a water intrusion layer. Figure 1 , the method comprising:

[0086] Step 101: The terminal obtains reservoir detection data of the target reservoir to be studied in the original period and the development period respectively.

[0087] The target reservoir may be a loose sandstone edge water gas reservoir; the reservoir detection data includes logging data and core data; and the reservoir detection data is obtained from logging data.

[0088] The original period is the period when the target reservoir is not developed, and the development period is the period when the target reservoir is developed.

[0089] Step 102: The terminal determines the first logging curves of the target reservoir in the original period and the development period respectively based on the reservoir detection data in the original period and the development period.

[0090] The target reservoir includes multiple reservoir blocks, and the first logging curve includes a first intersection curve of natural gamma and resistivity of each reservoir block; the first logging curve also includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block.

[0091] This step can be achieved by following the steps (1)-(3):

[0092] (1) The terminal performs standardization processing on the core data and logging data of each period.

[0093] Among them, the core data includes various data such as core porosity data, permeability data, saturation data and particle density data.

[0094] Among them, the logging data includes various data such as resistivity data, natural gamma data, neutron data, density data and natural potential data of the target reservoir.

[0095] Among them, since the core data and logging data include multiple types of data respectively, and the multiple types of data are measured by different measuring instruments, different measuring instruments measure different data types, and the data type can be at least one of fractions, percentages, and decimals.

[0096] In a possible implementation, the terminal unifies the core data and the logging data into at least one of fractions, percentages, and decimals by establishing a data unification model, so that the data types of the multiple data are the same.

[0097] In the embodiment of the present application, the core data and the logging data are standardized so that the logging data and the core data can be unified, and then the first logging curve can be quickly determined based on the standardized core data and the logging data.

[0098] (2) The terminal draws a second logging curve of the target reservoir based on the standardized logging data.

[0099] The second logging curve includes an uncorrected first intersection curve, a second intersection curve and a lithology curve.

[0100] Among them, the logging data includes resistivity data, natural gamma data, neutron data, density data and natural potential data of the target reservoir.

[0101] The terminal draws an uncorrected first intersection curve through resistivity data and natural gamma data; the terminal draws a second intersection curve through neutron data and density data; the lithology curve includes a natural potential curve and a natural gamma curve, and the terminal draws the lithology curve through the natural potential data and the natural gamma data.

[0102] (3) The terminal performs depth correction on the second logging curve based on the standardized core data to obtain the first logging curve.

[0103] Among them, the core data is the data obtained by taking the core at a certain depth in the target reservoir to the ground through drilling operations and conducting core experiments, while the logging data is the data measured by the logging instrument when the logging instrument is lowered into the well through drilling operations. Due to systematic errors and human errors in drilling operations, the target reservoir depth corresponding to the core data is different from the target reservoir depth corresponding to the logging data, but the core data and logging data at the same depth are matched. Therefore, the terminal can correct the depth in the second well curve based on the core data.

[0104] Among them, the core data includes porosity data, permeability data, saturation data, particle density data and other data of the core, which are used to represent the physical properties of the target reservoir; the logging data includes resistivity data, natural gamma data, neutron data, density data and natural potential data of the target reservoir, which are used to represent the lithology and electrical properties of the target reservoir, and the physical properties of the target reservoir at the same depth are matched with the lithology and electrical properties; if the first target depth of the core data of the target reservoir is different from the second target depth of the logging data in the second logging curve, the second target depth in the second logging curve is corrected to the first target depth.

[0105] In the embodiment of the present application, by correcting the first well logging curve, the accuracy of the first well logging curve can be improved, and thus the accuracy of the gas layer determined based on the first well logging curve can be improved.

[0106] In a possible implementation, the core data also includes data after a water sensitivity test and a speed sensitivity test are performed on the core. The water sensitivity test is a water invasion test performed on the core, and the speed sensitivity test is a water invasion test performed on the core at different water speeds. By matching the core data before and after water invasion with the well logging data, a response characteristic database of the well logging data of the water invasion layer can be obtained. When the water invasion layer is determined by the well logging data, if the measured well logging data matches the data in the response characteristic database, the water invasion layer can be determined.

[0107] Step 103: The terminal determines the target reservoir block based on the first intersection curve of the target reservoir in the original period, the minimum value of the natural gamma and the maximum value of the resistivity of the target reservoir block are in a symmetrical state, and the target reservoir block is determined to be a gas layer.

[0108] Among them, although the lithology of the target reservoir block is very different, the lithology components are relatively stable. The differences in the reservoir blocks are mainly controlled by the coarseness of the rock particles and the high and low mud content. The porosity variation range of the reservoir block is small, and the physical property difference is not closely related to the total porosity, but is closely related to the natural gamma logging. The minimum value of natural gamma corresponds to the location with the purest lithology, the most developed physical properties, and the highest gas saturation in the target reservoir, while the maximum value of resistivity corresponds to the gas layer in the target reservoir. The gas layer can be determined by natural gamma and resistivity. Figure 2 , Figure 2 It is the first intersection curve of various gas layers in the original period and the development period. The minimum value of natural gamma and the maximum value of resistivity of various gas layers in the original period are in a symmetrical state.

[0109] In the embodiment of the present application, the gas layer in the target reservoir is determined by combining the natural gamma ray and resistivity reservoir detection data, so that the accuracy of the determined gas layer can be improved.

[0110] The resistivity includes deep induction resistivity and lateral resistivity. The first intersection curve includes an intersection curve of the minimum value of natural gamma and the maximum value of resistivity, and an intersection curve of the minimum value of natural gamma and the maximum value of lateral resistivity.

[0111] If the target reservoir block is a high permeability layer, the minimum value of the natural gamma of the target reservoir block and the maximum value of the deep induction resistivity are symmetrical; if the target reservoir block is a low permeability layer, the minimum value of the natural gamma of the target reservoir block and the maximum value of the lateral resistivity are symmetrical.

[0112] The terminal performs standardization processing on the lateral resistivity and the deep induction resistivity, so that the data types of the lateral resistivity and the deep induction resistivity are the same, and then the lateral resistivity and the deep induction resistivity can be unified into the data type of the first intersection curve.

[0113] Step 104: The terminal obtains a resistivity histogram and a resistivity trend graph of the gas layer during the development period.

[0114] Among them, the resistivity histogram is a histogram of resistivity and sampling frequency, and the resistivity trend diagram is a contour diagram of resistivity in the target reservoir; the resistivity histogram and resistivity trend diagram can be directly obtained from the logging data.

[0115] Step 105: The terminal determines the resistivity change parameter of the gas layer from at least one of the first intersection curve, the resistivity histogram, and the resistivity trend graph of the gas layer during the development period.

[0116] This step can be implemented in any of the following ways:

[0117] In one possible implementation, if the second intersection curve, lithology curve and first intersection curve of the target reservoir block in the original period meet the first target condition, the terminal determines that the gas layer is a poor gas layer; and determines the resistivity change parameters of the poor gas layer from the resistivity histogram of the poor gas layer in the development period.

[0118] Among them, the first target condition is that there are no abnormalities in the density curve and the neutron curve in the second intersection curve, the natural gamma value in the lithology core curve is lower than the preset natural gamma value, there is no abnormality in the natural potential curve, and the resistivity curve in the first intersection curve has a sawtooth curve response characteristic.

[0119] Among them, the poor gas layer includes thin sand layers and thin interlayers, which are in a low gas content state and have low permeability; the thin sand layers have fine lithology, poor physical properties and low saturation; the thin interlayers present a superimposed form with developed interlayers.

[0120] Continue to see Figure 2 , the first intersection curve of the thin sand layer has poor symmetry, a small intersection area, and the resistivity curve after water invasion is mostly flat. It is difficult to determine the water invasion layer through the first intersection curve. Thin interlayers are more commonly seen in the superposition of interlayer development, and the thickness of multiple interlayers is lower than the minimum measurement thickness of the resistivity measuring instrument. Therefore, the resistivity of the thin interlayer measured is mostly the average resistivity of the multiple layers of mudstone and sandstone. The measured resistivity accuracy is low, and the permeability layer characteristics of the thin interlayer are obvious. After the thin interlayer is invaded by water, the local water invasion state or the water invasion state from the bottom can be seen from the first intersection curve. As the water invasion intensifies, the symmetry state on the first intersection curve gradually changes to a positive correlation state, and the symmetry is poor. It is difficult to determine the water invasion layer through the first intersection curve. From the characteristics of thin sand layers and thin interlayers, it can be seen that the poor gas layer has a low saturation degree. During the water invasion stage, the pressure drops, which deepens the mud invasion, resulting in the resistivity of the water-invaded layer being higher than the true resistivity. The poor gas layer has a small change in the resistivity curve after water invasion, while the resistivity histogram of the poor gas layer changes significantly after water invasion. Therefore, the resistivity histogram is used to determine whether the poor gas layer is invaded by water.

[0121] Among them, the resistivity change parameters of the poor gas layer include the resistivity peak value changed and the resistivity peak value not changed. The resistivity histogram of the poor gas layer is in the right peak state in the original period. If the resistivity histogram of the poor gas layer changes to a normal distribution state during the development period, the resistivity change parameter is determined to be the resistivity peak value changed; if the resistivity histogram of the poor gas layer is in the right peak state during the development period, the terminal determines the resistivity change parameter as the resistivity peak value not changed.

[0122] In one possible implementation, if the second intersection curve, lithology curve and first intersection curve of the target reservoir block in the original period meet the second target condition, the terminal determines that the gas layer is a gas-water layer; the terminal determines the resistivity change parameters of the gas-water layer from the resistivity trend diagram of the gas-water layer in the development period.

[0123] Among them, the second target condition is that there is an obvious amplitude change on the density curve in the second intersection curve, and the density of the gas layer part is small, the density of the water layer part is large, there is no obvious change on the neutron curve, the neutron amplitude is high in the gas layer part, and the neutron amplitude is low in the water layer part, there are no abnormalities in the resistivity curve and the natural gamma curve in the first intersection curve, and there are no abnormal curve response characteristics in the natural potential curve and the natural gamma curve in the lithology curve.

[0124] Among them, the gas-water layer contains both water layer and gas layer. As water invasion proceeds, the change on the resistivity curve is small, while the resistivity trend graph of the gas-water layer changes significantly after water invasion. Therefore, the resistivity trend graph is used to determine whether the gas-water layer is invaded by water.

[0125] Among them, the resistivity change parameters of the gas-water layer include local resistivity protrusion or unchanged resistivity. In the resistivity trend graph of the gas-water layer, the resistivity decreases from the center to the periphery in the original period. If the resistivity trend graph of the gas-water layer shows a local resistivity protrusion during the development period, the resistivity change parameter of the gas-water layer is determined to be a local resistivity protrusion; if the resistivity trend graph of the gas-water layer shows a decrease from the center to the periphery during the development period, the terminal determines that the resistivity change parameter of the gas-water layer is unchanged resistivity.

[0126] In one possible implementation, if the second intersection curve and lithology curve of the target reservoir block in the original period meet the third target condition, the terminal determines that the gas layer is a single sand body; and determines the resistivity change parameter of the single sand body from the first intersection curve of the single sand body in the development period.

[0127] Among them, the third target condition is that the neutron value on the second intersection curve is low and the density value is 2-2.5g / cm 3 , the natural potential value on the lithology curve is low, there is no abnormality in the natural gamma, and the curve response characteristics are that the intersection area of ​​the natural gamma curve and the resistivity curve on the first intersection curve is large.

[0128] Among them, the thickness of a single sand body is more than 1.5 meters, the core is uniform, the physical properties are developed, the gas content is high, and the porosity and permeability are high. Due to the large thickness of the single sand body, after the single sand body is invaded by water, the resistivity changes significantly on the resistivity curve, and water invasion is often seen from the bottom, the resistivity decreases or the resistivity peak moves, and then the resistivity change can quickly and intuitively display the position and thickness of the single sand body invaded by water.

[0129] Among them, the resistivity change parameter of the single sand body includes resistivity decrease or resistivity non-decrease. The first intersection curve of the single sand body is in a symmetrical state between the minimum value of natural gamma and the maximum value of resistivity in the original period. If the resistivity of the first intersection curve of the single sand body decreases during the development period, causing the symmetrical state to change, then the resistivity change parameter of the single sand body is determined to be resistivity decrease; if the resistivity of the first intersection curve of the single sand body does not decrease during the development period and the symmetrical state does not change, then the terminal determines that the resistivity change parameter of the single sand body is resistivity non-decrease.

[0130] Step 106: If the resistivity change parameter is used to indicate that the resistivity state of the gas layer has changed, the terminal determines that the gas layer is a water intrusion layer.

[0131] This step can be implemented in any of the following ways:

[0132] In a possible implementation, if the peak value of the resistivity histogram of the poor gas layer changes during the development period and the resistivity histogram becomes a normally distributed state, the terminal determines that the poor gas layer is a water invasion layer.

[0133] See also Figure 3 Taking the poor gas layer 4-2-1 as an example, in the original period when the poor gas layer was not invaded by water, the peak value of the resistivity on the resistivity histogram was located on the far right, which was a right-peak state; after the poor gas layer became a water-invaded layer, the peak value of the resistivity on the resistivity histogram shifted to the left, showing a normal distribution state.

[0134] In a possible implementation, if the gas layer is a gas-water layer, and if a resistivity trend graph of the gas-water layer shows a local prominent resistivity state during the development period, the terminal determines that the gas-water layer is a water-invasion layer.

[0135] Figure 4 This is the resistivity trend diagram of the gas-water layer during the development period. After the gas-water layer was invaded by water, the resistivity in the water-invaded area showed an obvious local protrusion.

[0136] In a possible implementation, if the gas layer is a single sand body, and if the resistivity of the first intersection curve of the single sand body decreases during the development period, causing the symmetry state to change, the terminal determines that the single sand body is a water invasion layer.

[0137] See also Figure 5 Taking the first intersection curve of the single sand bodies of the 3-2-1 and 3-3-1 layers in the original period of 2008 and the development period of 2016 as an example, in the first intersection curve, the minimum value of natural gamma and the maximum value of resistivity of the 3-2-1 and 3-3-1 layers in the original period are in a symmetrical state, while in the development period, the resistivity of the 3-2-1 and 3-3-1 layers decreases and the symmetrical state changes, it is determined that the single sand bodies of the 3-2-1 and 3-3-1 layers are invaded by water and become water-invaded layers.

[0138] In the embodiments of the present application, it is possible to accurately determine whether the poor gas layer, gas-water layer and single sand body are invaded by water. Since the loose sandstone edge water gas reservoir has the characteristics of "high mineralization, high porosity, high clay content and low resistivity", the interlayer heterogeneity is serious, resulting in poor reservoir diagenesis and low cementation. The number of gas sand bodies of the stored gas in the vertical direction is large and the thickness is thin, including poor gas layers, gas-water layers and single sand bodies. After the gas layer is invaded by water, the magnitude of the decrease in resistivity is not obvious, and it is difficult to accurately determine the water-invaded layer. The method for identifying the water-invaded layer provided in the embodiments of the present application can accurately identify the water-invaded layer of the loose sandstone edge water gas reservoir.

[0139] In the embodiment of the present application, through the above steps 101-106, the gas layer in the target reservoir can be determined, and by determining the resistivity change parameters of the gas layer during the development period, it can be determined whether the gas layer is invaded by water and the water-invaded layer can be identified. The embodiment of the present application can also determine the level of the water-invaded layer through the following steps 107-108.

[0140] Step 107: The terminal obtains logging interpretation parameters of the water invasion layer.

[0141] The logging interpretation parameters include at least one of movable water saturation, water-gas ratio, and water invasion thickness ratio.

[0142] Among them, movable water saturation and water-gas ratio can be directly obtained from the logging interpretation curve in the logging data; see Figure 6 , Figure 6 The movable water saturation and water-gas ratio can be directly obtained from the well logging interpretation curve; Figure 6 GR stands for natural gamma, and SP stands for spontaneous potential.

[0143] The water invasion thickness ratio is the ratio of the sand body thickness corresponding to the resistivity drop of the water invasion layer during the development period to the sand body thickness corresponding to the resistivity during the development period. The terminal determines the thickness of the water invasion layer by comparing the resistivity curve of the original period with the resistivity curve of the development period. Figure 7 The terminal overlaps the resistivity curve of the water invasion layer in the original period with the resistivity curve in the development period to determine the proportional thickness of the water invasion.

[0144] Step 108: The terminal determines the level of the water invasion layer based on the logging interpretation parameters.

[0145] In this step, the logging interpretation parameters include movable water saturation, water-gas ratio, and water invasion thickness ratio; this step can be implemented by any of the following implementation methods:

[0146] In one possible implementation, the terminal determines that the level of the water intrusion layer is first level water intrusion in response to the water vapor ratio being between a first preset water vapor ratio and a second preset water vapor ratio, the movable water saturation being less than the first preset movable water saturation, and the water intrusion thickness ratio being less than the first preset ratio, wherein the first preset water vapor ratio is less than the second preset water vapor ratio.

[0147] Among them, in the original period of the air layer, the water-gas ratio of the air layer is less than the first preset water-gas ratio; the first preset water-gas ratio is 0.5m 3 / 10 4 m 3 , the second preset water-gas ratio is 2m 3 / 10 4 m 3 , the first preset movable water saturation is 10.0%, the first preset ratio is 25%, and the first level of water invasion is weak water invasion. In the first level of water invasion, the resistivity amplitude decreases locally.

[0148] In another possible implementation, the terminal determines that the level of the water intrusion layer is second-level water intrusion in response to the water-vapor ratio being between the second preset water-vapor ratio and the third preset water-vapor ratio, the movable water saturation being between the first preset movable water saturation and the second preset movable water saturation, and the water intrusion thickness ratio being between the first preset ratio and the second preset ratio, wherein the second preset water-vapor ratio is less than the third preset water-vapor ratio, the first preset movable water saturation is less than the second preset movable water saturation, and the first preset ratio is less than the second preset ratio.

[0149] Among them, the third preset water-gas ratio is 5m 3 / 10 4 m 3 , the second preset movable water saturation is 15.0%, the second preset ratio is 50%, and the second level of water intrusion is medium water intrusion. In the second level of water intrusion, the resistivity amplitude decreases significantly, and the resistivity peak value in the symmetrical state changes smoothly.

[0150] In another possible implementation, the terminal determines that the level of the water intrusion layer is the third level of water intrusion in response to the water-gas ratio being greater than a third preset water-gas ratio, the movable water saturation being greater than a second preset movable water saturation, and the water intrusion thickness ratio being greater than the second preset ratio.

[0151] Among them, the third level of water intrusion is strong water intrusion; in the third level of water intrusion, the resistivity amplitude decreases significantly, and the peak value of the resistivity shows a symmetrical reversal state.

[0152] In the embodiment of the present application, by determining the water invasion level of the water invasion layer, the production characteristics of the water invasion layer can also be determined; when the gas layer is not invaded by water, the gas layer production capacity is stable; when the water invasion layer is the first level of water invasion, the water invasion layer production capacity is high and the water content fluctuates; when the water invasion layer is the second level of water invasion, the water content of the water invasion layer increases rapidly and continuously; when the water invasion layer is the third level of water invasion, the high water content of the water invasion layer maintains a high level of fluctuation.

[0153] The specific parameters for determining the level of water intrusion layer are shown in Table 1.

[0154] Table 1

[0155]

[0156] In the embodiment of the present application, by qualitatively determining the water invasion layer and quantitatively determining the level of the water invasion layer, it is possible to guide the deployment and adjustment of capacity construction, optimize the adjustment of the perforation layer of the new well, and deepen the understanding of water invasion in the gas reservoir, providing a reliable geological basis for the comprehensive water control plan; specifically, it is embodied in the following aspects:

[0157] (1) In terms of guiding the deployment and adjustment of capacity construction: from 2017 to 2018, a total of 64 capacity wells were deployed and adjusted, and 11.206 billion cubic meters of risk capacity was built.

[0158] (2) In terms of optimizing and adjusting the perforation positions of newly invested wells: from 2017 to 2018, a total of 64 production wells were optimized and adjusted, 6 wells with water intrusion were effectively avoided, and the production capacity utilization rate was increased by 4%.

[0159] (3) In terms of deepening the understanding of water intrusion in gas reservoirs and providing a reliable geological basis for comprehensive water control plans: In 2018, the gas field implemented 1,149 downhole measures such as drainage and gas production, layer adjustment and perforation filling in accordance with the water control plan, increasing gas production by 1.0917 million cubic meters per day and 182 million cubic meters per year.

[0160] In another possible implementation manner, the terminal determines the gas-water boundary of the single sand body based on the first intersection curve.

[0161] Figure 8This is the first intersection curve of a single sand body reservoir block between multiple wells. It can be seen that along the long axis direction of the single sand body, the single sand body is in an arched state, and its fluid state is mainly affected by the height of the single sand body. In the area of ​​wells 3 and 4, the first intersection curve has an obvious symmetry state and a large intersection area, indicating that the gas saturation of the single sand body in the area of ​​wells 3 and 4 is high, and the fluid state is gaseous, which is a typical gas layer feature. In the area of ​​well 2, the symmetry of the lower part of the first intersection curve disappears, and the gas saturation decreases significantly, indicating that the single sand body begins to transition to the same layer of gas and water or the water invasion layer, and the area of ​​well 2 begins to approach the gas-water boundary. In the Well 1 and Well 5 areas, the symmetric state of the first intersection curve disappears, indicating that the single sand body is invaded by water and transformed into a water-invaded layer; since the single sand body is not invaded by water in the Well 2 and Well 4 areas, the single sand body is transformed into a water-invaded layer in the Well 1 and Well 5 areas. It can be seen that the gas-water boundary is located between Well 1 and Well 2, and between Well 4 and Well 5, while the original well logging interpretation is that the single sand bodies in the Well 1 and Well 5 areas are all gas layers. By comparison, the method for identifying the water-invaded layer provided in the embodiment of the present application can accurately identify the water-invaded layer, thereby accurately dividing the gas-water boundary, making the re-divided gas-water boundary consistent with the production capacity of the development well, thereby solving the problem of the gas-water boundary being inconsistent with the production capacity of the development well during development.

[0162] An embodiment of the present application provides a method for identifying a water-invaded layer. The method can determine a first intersection curve of natural gamma and resistivity of each reservoir block of the target reservoir in the original period, and then determine the gas layer in the target reservoir through the symmetric state of natural gamma and resistivity in the first intersection curve. In this way, the method determines the gas layer in the target reservoir by combining the two reservoir detection data of natural gamma and resistivity, thereby improving the accuracy of determining the gas layer. Furthermore, by determining the resistivity change parameters of the gas layer in the development period, it is determined whether the gas layer is invaded by water. In this way, whether the gas layer is invaded by water is determined based on the accurately identified gas layer, and the water-invaded layer can be accurately identified, thereby improving the accuracy of identifying the water-invaded layer.

[0163] The present application embodiment provides a determination device for identifying a water intrusion layer, see Fig. 9 , the device comprises:

[0164] The first acquisition module 901 is used to acquire reservoir detection data of the target reservoir to be studied in the original period and the development period respectively;

[0165] A first determination module 902 is used to determine first well logging curves of a target reservoir in the original period and the development period respectively based on reservoir detection data in the original period and the development period, wherein the target reservoir includes multiple reservoir blocks, and the first well logging curve includes a first intersection curve of natural gamma and resistivity of each reservoir block;

[0166] The second determination module 903 is used to determine the target reservoir block based on the first intersection curve of the target reservoir in the original period, the minimum value of the natural gamma and the maximum value of the resistivity of the target reservoir block are in a symmetrical state, and the target reservoir block is determined as a gas layer;

[0167] The second acquisition module 904 is used to obtain the resistivity histogram and resistivity trend diagram of the gas layer during the development period;

[0168] The third determination module 905 determines the resistivity change parameter of the gas layer from at least one of the first intersection curve, the resistivity histogram, and the resistivity trend graph of the gas layer during the development period;

[0169] The fourth determination module 906 determines that the gas layer is a water invasion layer if the resistivity change parameter is used to indicate that the resistivity state of the gas layer has changed.

[0170] In a possible implementation, the first well logging curve further includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block;

[0171] The third determining module 905 includes:

[0172] A first determination unit is used to determine that the gas layer is a poor gas layer if the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet the first target condition;

[0173] The second determination unit is used to determine the resistivity change parameter of the poor gas layer from the resistivity histogram of the poor gas layer during the development period.

[0174] In a possible implementation, the first well logging curve further includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block;

[0175] The third determining module 905 includes:

[0176] a third determination unit, for determining that the gas layer is a gas-water layer if the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet a second target condition;

[0177] The fourth determination unit is used to determine the resistivity change parameter of the gas-water layer from the resistivity trend diagram of the gas-water layer during the development period.

[0178] In a possible implementation, the first well logging curve further includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block;

[0179] The third determining module 905 includes:

[0180] A fifth determination unit is used to determine that the gas layer is a single sand body if the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet the third target condition;

[0181] The sixth determination unit is used to determine the resistivity variation parameter of the single sand body from the first intersection curve of the single sand body during the development period.

[0182] In a possible implementation, the reservoir detection data includes well logging data and core data;

[0183] The first determining module 902 includes:

[0184] A processing unit, for performing standardization processing on the core data and logging data of each period;

[0185] A drawing unit, used for drawing a second logging curve of the target reservoir based on the well logging data after the standardization process;

[0186] The correction unit is used to perform depth correction on the second logging curve based on the standardized core data to obtain the first logging curve.

[0187] In a possible implementation, the device further includes:

[0188] The third acquisition module 907 is used to obtain the logging interpretation parameters of the water invasion layer, where the logging interpretation parameters include at least one of movable water saturation, water-gas ratio, and water invasion thickness ratio;

[0189] The fifth determination module 908 is used to determine the level of the water invasion layer based on the well logging interpretation parameters.

[0190] In a possible implementation, the logging interpretation parameters include movable water saturation, water-gas ratio, and water invasion thickness ratio. The fifth determination module 908 includes:

[0191] a seventh determining unit, configured to determine that the level of the water intrusion layer is first level water intrusion in response to the water-gas ratio being between the first preset water-gas ratio and the second preset water-gas ratio, the movable water saturation being less than the first preset movable water saturation, and the water intrusion thickness ratio being less than the first preset ratio, wherein the first preset water-gas ratio is less than the second preset water-gas ratio;

[0192] an eighth determining unit, configured to determine that the level of the water intrusion layer is second-level water intrusion in response to the water-gas ratio being between the second preset water-gas ratio and the third preset water-gas ratio, the movable water saturation being between the first preset movable water saturation and the second preset movable water saturation, and the water intrusion thickness ratio being between the first preset ratio and the second preset ratio, wherein the second preset water-gas ratio is less than the third preset water-gas ratio, the first preset movable water saturation is less than the second preset movable water saturation, and the first preset ratio is less than the second preset ratio;

[0193] The ninth determining unit is used to determine that the level of the water intrusion layer is the third level of water intrusion in response to the water-gas ratio being greater than the third preset water-gas ratio, the movable water saturation being greater than the second preset movable water saturation, and the water intrusion thickness ratio being greater than the second preset ratio.

[0194] Fig.10 The structure block diagram of a terminal 1000 provided by an exemplary embodiment of the present application is shown. The terminal 1000 may be a portable mobile terminal, such as a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III), an MP4 player (Moving Picture Experts Group Audio Layer IV), a laptop computer or a desktop computer. The terminal 1000 may also be called a user device, a portable terminal, a laptop terminal, a desktop terminal or other names.

[0195] Typically, the terminal 1000 includes a processor 1001 and a memory 1002 .

[0196] The processor 1001 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 1001 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 1001 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 1001 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 1001 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0197] The memory 1002 may include one or more computer-readable storage media, which may be non-transitory. The memory 1002 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 1002 is used to store at least one instruction, which is used to be executed by the processor 1001 to implement the determination method for identifying the water intrusion layer provided in the method embodiment of the present application.

[0198] In some embodiments, the terminal 1000 may also optionally include: a peripheral device interface 1003 and at least one peripheral device. The processor 1001, the memory 1002 and the peripheral device interface 1003 may be connected via a bus or a signal line. Each peripheral device may be connected to the peripheral device interface 1003 via a bus, a signal line or a circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 1004, a display screen 1005, a camera assembly 1006, an audio circuit 1007, a positioning assembly 1008 and a power supply 1009.

[0199] The peripheral device interface 1003 may be used to connect at least one peripheral device related to I / O (Input / Output) to the processor 1001 and the memory 1002. In some embodiments, the processor 1001, the memory 1002, and the peripheral device interface 1003 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 1001, the memory 1002, and the peripheral device interface 1003 may be implemented on a separate chip or circuit board, which is not limited in this embodiment.

[0200] The radio frequency circuit 1004 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 1004 communicates with the communication network and other communication devices through electromagnetic signals. The radio frequency circuit 1004 converts the electrical signal into an electromagnetic signal for transmission, or converts the received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 1004 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, etc. The radio frequency circuit 1004 can communicate with other terminals through at least one wireless communication protocol. The wireless communication protocol includes but is not limited to: the World Wide Web, a metropolitan area network, an intranet, various generations of mobile communication networks (2G, 3G, 4G and 5G), a wireless local area network and / or a WiFi (Wireless Fidelity) network. In some embodiments, the radio frequency circuit 1004 may also include circuits related to NFC (Near Field Communication), which is not limited in this application.

[0201] The display screen 1005 is used to display a UI (User Interface). The UI may include graphics, text, icons, videos, and any combination thereof. When the display screen 1005 is a touch display screen, the display screen 1005 also has the ability to collect touch signals on the surface or above the surface of the display screen 1005. The touch signal can be input to the processor 1001 as a control signal for processing. At this time, the display screen 1005 can also be used to provide virtual buttons and / or virtual keyboards, also known as soft buttons and / or soft keyboards. In some embodiments, the display screen 1005 can be one, arranged on the front panel of the terminal 1000; in other embodiments, the display screen 1005 can be at least two, respectively arranged on different surfaces of the terminal 1000 or in a folding design; in other embodiments, the display screen 1005 can be a flexible display screen, arranged on a curved surface or a folding surface of the terminal 1000. Even, the display screen 1005 can also be arranged as a non-rectangular irregular figure, that is, a special-shaped screen. The display screen 1005 can be made of materials such as LCD (Liquid Crystal Display) and OLED (Organic Light-Emitting Diode).

[0202] The camera assembly 1006 is used to capture images or videos. Optionally, the camera assembly 1006 includes a front camera and a rear camera. Typically, the front camera is arranged on the front panel of the terminal, and the rear camera is arranged on the back of the terminal. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth of field camera, a wide-angle camera, and a telephoto camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, the fusion of the main camera and the wide-angle camera to realize the panoramic shooting and VR (Virtual Reality) shooting function or other fusion shooting functions. In some embodiments, the camera assembly 1006 may also include a flash. The flash can be a monochrome temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm light flash and a cold light flash, which can be used for light compensation at different color temperatures.

[0203] The audio circuit 1007 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals and input them into the processor 1001 for processing, or input them into the radio frequency circuit 1004 to achieve voice communication. For the purpose of stereo acquisition or noise reduction, there may be multiple microphones, which are respectively arranged at different parts of the terminal 1000. The microphone may also be an array microphone or an omnidirectional acquisition microphone. The speaker is used to convert the electrical signal from the processor 1001 or the radio frequency circuit 1004 into sound waves. The speaker may be a traditional film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert the electrical signal into sound waves audible to humans, but also convert the electrical signal into sound waves inaudible to humans for purposes such as ranging. In some embodiments, the audio circuit 1007 may also include a headphone jack.

[0204] The positioning component 1008 is used to locate the current geographical location of the terminal 1000 to implement navigation or LBS (Location Based Service). The positioning component 1008 can be a positioning component based on the US GPS (Global Positioning System), China's Beidou system or Russia's Galileo system.

[0205] The power supply 1009 is used to power various components in the terminal 1000. The power supply 1009 can be an alternating current, a direct current, a disposable battery, or a rechargeable battery. When the power supply 1009 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery charged through a wired line, and a wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0206] In some embodiments, the terminal 1000 further includes one or more sensors 1010 , including but not limited to: an acceleration sensor 1011 , a gyroscope sensor 1012 , a pressure sensor 1013 , a fingerprint sensor 1014 , an optical sensor 1015 , and a proximity sensor 1016 .

[0207] The acceleration sensor 1011 can detect the magnitude of acceleration on the three coordinate axes of the coordinate system established by the terminal 1000. For example, the acceleration sensor 1011 can be used to detect the components of gravity acceleration on the three coordinate axes. The processor 1001 can control the display screen 1005 to display the user interface in a horizontal view or a vertical view according to the gravity acceleration signal collected by the acceleration sensor 1011. The acceleration sensor 1011 can also be used to collect motion data of games or users.

[0208] The gyro sensor 1012 can detect the body direction and rotation angle of the terminal 1000, and the gyro sensor 1012 can cooperate with the acceleration sensor 1011 to collect the user's 3D actions on the terminal 1000. The processor 1001 can implement the following functions based on the data collected by the gyro sensor 1012: motion sensing (such as changing the UI according to the user's tilt operation), image stabilization during shooting, game control, and inertial navigation.

[0209] The pressure sensor 1013 can be set on the side frame of the terminal 1000 and / or the lower layer of the display screen 1005. When the pressure sensor 1013 is set on the side frame of the terminal 1000, it can detect the user's holding signal of the terminal 1000, and the processor 1001 performs left and right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 1013. When the pressure sensor 1013 is set on the lower layer of the display screen 1005, the processor 1001 controls the operability controls on the UI interface according to the user's pressure operation on the display screen 1005. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.

[0210] The fingerprint sensor 1014 is used to collect the user's fingerprint, and the processor 1001 identifies the user's identity based on the fingerprint collected by the fingerprint sensor 1014, or the fingerprint sensor 1014 identifies the user's identity based on the collected fingerprint. When the user's identity is identified as a trusted identity, the processor 1001 authorizes the user to perform relevant sensitive operations, including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings. The fingerprint sensor 1014 can be set on the front, back, or side of the terminal 1000. When a physical button or a manufacturer logo is set on the terminal 1000, the fingerprint sensor 1014 can be integrated with the physical button or the manufacturer logo.

[0211] The optical sensor 1015 is used to collect the ambient light intensity. In one embodiment, the processor 1001 can control the display brightness of the display screen 1005 according to the ambient light intensity collected by the optical sensor 1015. Specifically, when the ambient light intensity is high, the display brightness of the display screen 1005 is increased; when the ambient light intensity is low, the display brightness of the display screen 1005 is reduced. In another embodiment, the processor 1001 can also dynamically adjust the shooting parameters of the camera assembly 1006 according to the ambient light intensity collected by the optical sensor 1015.

[0212] The proximity sensor 1016, also called a distance sensor, is usually arranged on the front panel of the terminal 1000. The proximity sensor 1016 is used to collect the distance between the user and the front of the terminal 1000. In one embodiment, when the proximity sensor 1016 detects that the distance between the user and the front of the terminal 1000 is gradually decreasing, the processor 1001 controls the display screen 1005 to switch from the screen-on state to the screen-off state; when the proximity sensor 1016 detects that the distance between the user and the front of the terminal 1000 is gradually increasing, the processor 1001 controls the display screen 1005 to switch from the screen-off state to the screen-on state.

[0213] Those skilled in the art will understand that Fig.10 The structure shown in the figure does not constitute a limitation on the terminal 1000, and the terminal 1000 may include more or less components than those shown in the figure, or combine some components, or adopt a different component arrangement.

[0214] On the other hand, a computer-readable storage medium is provided, in which at least one program code is stored. The at least one program code is loaded and executed by a processor to implement the steps in the method for identifying a water intrusion layer described in any of the above implementations.

[0215] On the other hand, a computer program product or a computer program is provided, the computer program product or the computer program comprising a computer program code, the computer program code being stored in a computer-readable storage medium. A processor of a terminal reads the computer program code from the computer-readable storage medium, and the processor executes the computer program code, so that the terminal performs the operations performed by the above-mentioned determination method for identifying a water intrusion layer.

[0216] In some embodiments, the computer program involved in the embodiments of the present application may be deployed and executed on one terminal, or on multiple terminals located at one location, or on multiple terminals distributed at multiple locations and interconnected by a communication network. Multiple terminals distributed at multiple locations and interconnected by a communication network may constitute a blockchain system.

[0217] An embodiment of the present application provides a method for identifying a water-invaded layer. The method can determine a first intersection curve of natural gamma and resistivity of each reservoir block of the target reservoir in the original period, and then determine the gas layer in the target reservoir through the symmetric state of natural gamma and resistivity in the first intersection curve. In this way, the method determines the gas layer in the target reservoir by combining the two reservoir detection data of natural gamma and resistivity, thereby improving the accuracy of determining the gas layer. Furthermore, by determining the resistivity change parameters of the gas layer in the development period, it is determined whether the gas layer is invaded by water. In this way, whether the gas layer is invaded by water is determined based on the accurately identified gas layer, and the water-invaded layer can be accurately identified, thereby improving the accuracy of identifying the water-invaded layer.

[0218] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for identifying a water intrusion layer, characterized in that: The method comprises: Obtain reservoir detection data of the target reservoir to be studied in the original period and the development period; Based on the reservoir detection data in the original period and the development period, respectively determine the first well logging curve of the target reservoir in the original period and the development period, the target reservoir includes a plurality of reservoir blocks, and the first well logging curve includes a first intersection curve of natural gamma and resistivity of each reservoir block; Based on the first intersection curve of the target reservoir in the original period, a target reservoir block is determined, the minimum value of the natural gamma and the maximum value of the resistivity of the target reservoir block are in a symmetrical state, and the target reservoir block is determined as a gas layer; Obtaining a resistivity histogram and a resistivity trend diagram of the gas layer during the development period; Determining a resistivity variation parameter of the gas layer from at least one of a first intersection curve, a resistivity histogram, and a resistivity trend graph of the gas layer during the development period; If the resistivity change parameter is used to indicate that the resistivity state of the gas layer has changed, it is determined that the gas layer is a water-invaded layer; The first well logging curve also includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block; Determining the resistivity change parameter of the gas layer from at least one of the first intersection curve, the resistivity histogram, and the resistivity trend graph of the gas layer during the development period includes: If the second intersection curve, lithology curve and first intersection curve of the target reservoir block in the original period meet the first target condition, the gas layer is determined to be a poor gas layer; the first target condition is that the density curve and the neutron curve in the second intersection curve have no abnormalities, the natural gamma value in the lithology core curve is lower than the preset natural gamma value, the natural potential curve has no abnormalities, and the resistivity curve in the first intersection curve has a sawtooth curve response characteristic; Determining resistivity variation parameters of the poor gas layer from a resistivity histogram of the poor gas layer during the development period; If the second intersection curve, lithology curve and first intersection curve of the target reservoir block in the original period meet the second target condition, the gas layer is determined to be a gas-water layer; the second target condition is that there is an obvious amplitude change on the density curve in the second intersection curve, and the density of the gas layer part is small, the density of the water layer part is large, there is an inconspicuous change on the neutron curve, the neutron amplitude of the gas layer part is high, the neutron amplitude of the water layer part is low, the resistivity curve and the natural gamma curve in the first intersection curve are normal, and the natural potential curve and the natural gamma curve in the lithology curve are normal. Determining resistivity variation parameters of the gas-water layer from a resistivity trend diagram of the gas-water layer during the development period; If the second intersection curve, lithology curve and first intersection curve of the target reservoir block in the original period meet the third target condition, the gas layer is determined to be a single sand body; the third target condition is that the neutron value on the second intersection curve is low and the density value is 2-2.5g / cm 3 , the natural potential value on the lithology curve is low, the natural gamma has no abnormality, and the curve response characteristics of the first intersection curve have a large intersection area between the natural gamma curve and the resistivity curve; The resistivity variation parameter of the single sand body is determined from the first intersection curve of the single sand body during the development period.

2. The method for identifying a water intrusion layer according to claim 1, characterized in that: The reservoir detection data includes well logging data and core data; The determining, based on the well logging data of the original period and the development period, respectively the first well logging curves of the target reservoir in the original period and the development period comprises: For each period, the core data and well log data of the period are normalized; Based on the standardized logging data, drawing a second logging curve of the target reservoir; Based on the standardized core data, the second well logging curve is depth corrected to obtain the first well logging curve.

3. The method for identifying a water intrusion layer according to claim 1, characterized in that: The method further comprises: Acquire logging interpretation parameters of the water invasion layer, wherein the logging interpretation parameters include movable water saturation, water-gas ratio, and water invasion thickness ratio; Determining the level of the water invasion layer based on the well logging interpretation parameters; Wherein, determining the level of the water invasion layer based on the well logging interpretation parameters includes: In response to the water-gas ratio being between a first preset water-gas ratio and a second preset water-gas ratio, the movable water saturation being less than the first preset movable water saturation, and the water invasion thickness ratio being less than the first preset ratio, determining that the level of the water invasion layer is first level water invasion, wherein the first preset water-gas ratio is less than the second preset water-gas ratio; In response to the water-gas ratio being between the second preset water-gas ratio and the third preset water-gas ratio, the movable water saturation being between the first preset movable water saturation and the second preset movable water saturation, and the water invasion thickness ratio being between the first preset ratio and the second preset ratio, determining that the level of the water invasion layer is the second level of water invasion, wherein the second preset water-gas ratio is less than the third preset water-gas ratio, the first preset movable water saturation is less than the second preset movable water saturation, and the first preset ratio is less than the second preset ratio; In response to the water-gas ratio being greater than the third preset water-gas ratio, the movable water saturation being greater than the second preset movable water saturation, and the water invasion thickness ratio being greater than the second preset ratio, the level of the water invasion layer is determined to be third level water invasion.

4. A determination device for identifying a water intrusion layer, characterized in that: The device comprises: The first acquisition module is used to acquire reservoir detection data of the target reservoir to be studied in the original period and the development period respectively; A first determination module is used to determine the first well logging curve of the target reservoir in the original period and the development period respectively based on the reservoir detection data in the original period and the development period, the target reservoir includes a plurality of reservoir blocks, and the first well logging curve includes a first intersection curve of natural gamma and resistivity of each reservoir block; A second determination module is used to determine a target reservoir block based on the first intersection curve of the target reservoir in the original period, wherein the minimum value of natural gamma and the maximum value of resistivity of the target reservoir block are in a symmetrical state, and the target reservoir block is determined as a gas layer; A second acquisition module is used to acquire a resistivity histogram and a resistivity trend graph of the gas layer during the development period; A third determination module is used to determine the resistivity change parameter of the gas layer from at least one of the first intersection curve, the resistivity histogram, and the resistivity trend graph of the gas layer during the development period; A fourth determination module, configured to determine that the gas layer is a water intrusion layer if the resistivity change parameter is used to indicate that the resistivity state of the gas layer changes; The first well logging curve also includes a second intersection curve of density and neutron of each reservoir block and a lithology curve of each reservoir block; The third determining module comprises: A first determination unit is used to determine that the gas layer is a poor gas layer if the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet a first target condition; the first target condition is that the density curve and the neutron curve in the second intersection curve have no anomalies, the natural gamma value in the lithology core curve is lower than the preset natural gamma value, the natural potential curve has no anomalies, and the resistivity curve in the first intersection curve has a sawtooth curve response characteristic; A second determining unit is used to determine a resistivity change parameter of the poor gas layer from a resistivity histogram of the poor gas layer during the development period; A third determination unit is used to determine that the gas layer is a gas-water layer if the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet the second target condition; the second target condition is that there is an obvious amplitude change on the density curve in the second intersection curve, and the density of the gas layer part is small, the density of the water layer part is large, there is an inconspicuous change on the neutron curve, the neutron amplitude of the gas layer part is high, the neutron amplitude of the water layer part is low, the resistivity curve and the natural gamma curve in the first intersection curve are normal, and the natural potential curve and the natural gamma curve in the lithology curve are normal. Curve response characteristics; a fourth determining unit, for determining a resistivity variation parameter of the gas-water layer from a resistivity trend diagram of the gas-water layer during the development period; The fifth determination unit is used to determine that the gas layer is a single sand body if the second intersection curve, the lithology curve and the first intersection curve of the target reservoir block in the original period meet the third target condition; the third target condition is that the neutron value on the second intersection curve is low and the density value is 2-2.5g / cm 3 , the natural potential value on the lithology curve is low, the natural gamma has no abnormality, and the curve response characteristics of the first intersection curve have a large intersection area between the natural gamma curve and the resistivity curve; The sixth determination unit is used to determine the resistivity change parameter of the single sand body from the first intersection curve of the single sand body in the development period.

5. A terminal, characterized in that: The terminal includes one or more processors and one or more memories, wherein at least one instruction is stored in the one or more memories, and the at least one instruction is loaded and executed by the one or more processors to implement the operations performed by the method for identifying the water intrusion layer as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that: The storage medium stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement the operation performed by the method for identifying the water invasion layer according to any one of claims 1 to 3.

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