Method and system for predicting water invasion path based on formation water multi-ion analysis

Abstract

The invention discloses a method and system for analyzing and predicting a water invasion path based on formation water multi-ions, and the method comprises the steps: obtaining the ion concentration data of a water sample, drawing a multi-ion concentration radar map, and building a condensate water and formation water radar map standard chart based on the multi-ion concentration radar map; acquiring a water sample in the production process of a production well, drawing a multi-ion concentration radar map, comparing the multi-ion concentration radar map with a condensate water and formation water radar map standard plate, and performing weak water invasion identification and early warning; the method comprises the following steps: acquiring a water sample of a production well with water invasion and weak water invasion, drawing a multi-ion concentration radar map, comparing the multi-ion concentration radar map with a condensate water and formation water radar map standard plate, and predicting a water invasion path. According to the method, in the early stage of gas reservoir water invasion, a water invasion early warning mechanism is established through the comprehensive change characteristics of the multi-ion content of gas well formation water, weak water invasion signals are recognized in advance, and time is won for the gas well and the gas reservoir to carry out water invasion retarding countermeasures in advance and formulate a water control and yield stabilization scheme.

Description

Technical Field

[0001] The present invention belongs to the field of dynamic analysis and research of oil and gas fields, and particularly relates to a method and system for predicting water invasion paths based on multi-ion analysis of formation water. Background Art

[0002] During the development of water-bearing gas reservoirs, water invasion will cause gas wells to produce water, which not only increases the difficulty of gas reservoir development and production, but also causes productivity loss of gas wells, reduces the recovery rate of gas reservoirs, and affects the development efficiency of gas reservoirs. Therefore, it is necessary to judge the water invasion dynamics of water drive gas reservoirs in advance, especially to predict the water invasion path. At present, the achievements in gas reservoir water invasion identification in China are mainly based on the comprehensive identification of water invasion by combining geological structures, reservoirs and gas well positions on the basis of dynamic monitoring such as the water breakthrough time of gas wells, the change of gas-water ratio, the change of formation pressure, the type of formation water, and the change of chloride ion content. However, most of these studies are based on the conditions of ignoring the influence of reservoir heterogeneity, having continuous acquisition of dynamic data, and after the gas well confirms water breakthrough, etc., and cannot effectively identify weak water invasion signs, give early warnings before water breakthrough and control water countermeasures in a timely manner; and cannot predict the inter-well water invasion path after water breakthrough, which greatly affects the development of water invasion early warning, drainage production well group division, and accurate drainage and production increase work in the middle and late stages of gas reservoir development. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and system for predicting water invasion paths based on multi-ion analysis of formation water, so as to solve the problems that the prior art cannot effectively identify weak water invasion signs, give early warnings before water breakthrough and control water countermeasures in a timely manner; and cannot predict the inter-well water invasion path after water breakthrough, which greatly affects the development of water invasion early warning, drainage production well group division, and accurate drainage and production increase work in the middle and late stages of gas reservoir development.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] In the first aspect, the present invention provides a method for predicting water invasion paths based on multi-ion analysis of formation water, including:

[0006] Obtain water sample ion concentration data, draw a multi-ion concentration radar chart, and establish a standard chart of condensate water and formation water radar charts based on the multi-ion concentration radar chart;

[0007] Obtain water samples during the production process of production wells, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to identify and give early warnings of weak water invasion;

[0008] Obtain water samples of production wells with water invasion and weak water invasion that have occurred, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to predict the water invasion path.

[0009] Optionally, obtain the ion concentration data of the water sample and draw a multi-ion concentration radar chart:

[0010] Select representative water samples collected from gas wells and water wells during oil testing and production processes, conduct full analysis experiments on the components of the water samples to obtain various ion concentration data; for each water sample, select 6 data of 7 important ions including Cl - , SO4 2- , HCO 3- , Ca 2+ , Mg 2+ , (K + +Na + ), perform normalization processing on the ion concentration data to ensure that the normalized ion concentration values are within the range of 1-10, and draw a multi-ion concentration radar chart.

[0011] Optionally, establish a standard chart of condensate water and formation water radar charts based on the multi-ion concentration radar chart:

[0012] Based on the analysis of the morphological differences of the multi-ion concentration radar charts of water samples from gas wells and water wells, establish a standard chart of condensate water and formation water radar charts; if there are obvious differences in formation water in different vertical intervals and different regions on the plane of the gas reservoir, different standard radar charts of formation water should be established by interval and by region.

[0013] Optionally, obtain the water samples during the production process of production wells, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to identify and warn of weak water invasion:

[0014] Collect effective water samples excluding external water bodies at the initial stage of production of production wells, conduct full analysis tests on the components, and draw a radar chart of the initial water sample of a single well;

[0015] Compare the radar chart of the initial water sample of a single well with the standard charts of condensate water and formation water radar charts of the gas reservoir to qualitatively determine whether water invasion has occurred: if the morphology of the radar chart of the initial water sample of a single well is consistent with the standard chart of condensate water radar chart of the gas reservoir, it indicates that the produced water of this well is condensate water and there is no initial water invasion; if the morphology of the radar chart of the initial water sample of a single well is consistent with the standard chart of formation water radar chart of the gas reservoir, it indicates that the produced water of this well is formation water and water invasion has occurred initially; if the morphology of the radar chart of the initial water sample of a single well is between the standard charts of condensate water and formation water radar charts of the gas reservoir, it indicates that the produced water of this well is a mixed water body of condensate water and formation water and weak water invasion has occurred.

[0016] Optionally, regularly collect water samples from gas wells without water invasion, conduct full analysis of the components of the water samples, draw a radar chart of the production water sample of a single well, and compare it with the radar chart of the initial water sample of this well. If the morphology is consistent, there is no water invasion; if the morphology changes, collect and analyze water samples in a timely and intensified manner, draw an ion concentration radar chart, and when the morphology gradually transitions to the standard chart of formation water radar chart of the gas reservoir, it is determined that weak water invasion has occurred in this well.

[0017] Optionally, obtain water samples from production wells with water encroachment and weak water encroachment, draw a radar chart of multi-ion concentration, and compare it with the standard chart of condensate water and formation water radar chart to predict the water encroachment path:

[0018] For gas wells with confirmed water encroachment and weak water encroachment, regularly collect formation water samples, conduct a comprehensive analysis of formation water components, and draw a radar chart of multi-ion concentration;

[0019] Based on the comparative analysis of the radar charts of multi-ion concentration of formation water in multiple wells, combined with the geological characteristics and production dynamic characteristics of single wells, judge the potential connectivity relationship between wells and predict the water encroachment path.

[0020] Optionally, if the shapes of the multi-ion radar charts of formation water in adjacent wells are consistent and coincide with the standard radar chart of formation water in this area of the gas reservoir; located within the same regional structure with continuous reservoir sand bodies; there is well interference during the production process, it indicates that the two have the same formation water intrusion and the wells are connected. Then, combined with the height of the structural position and the characteristics of fault development, determine the water encroachment path.

[0021] In a second aspect, the present invention provides a system for predicting water encroachment path based on multi-ion analysis of formation water, including:

[0022] A standard chart drawing module, configured to obtain water sample ion concentration data, draw a radar chart of multi-ion concentration, and establish a standard chart of condensate water and formation water radar chart based on the radar chart of multi-ion concentration;

[0023] A weak water encroachment identification and early warning module, configured to obtain water samples during the production process of production wells, draw a radar chart of multi-ion concentration, compare it with the standard chart of condensate water and formation water radar chart, and conduct weak water encroachment identification and early warning;

[0024] A prediction module, configured to obtain water samples from production wells with water encroachment and weak water encroachment, draw a radar chart of multi-ion concentration, compare it with the standard chart of condensate water and formation water radar chart, and predict the water encroachment path.

[0025] In a third aspect, the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of a method for predicting water encroachment path based on multi-ion analysis of formation water.

[0026] In a fourth aspect, the present invention provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, it implements the steps of a method for predicting water encroachment path based on multi-ion analysis of formation water.

[0027] Compared with the prior art, the present invention has the following technical effects:

[0028] The method for predicting the water invasion path through multi-ion analysis of formation water provided by the present invention has two aspects. First, in the early stage of water invasion in the gas reservoir, through the comprehensive change characteristics of the multi-ion content of the formation water in the gas well, a water invasion early warning mechanism is established to identify weak water invasion signals in advance, winning time for the gas well and the gas reservoir to carry out countermeasures to mitigate water invasion and formulate water control and stable production plans in advance. Second, after the gas reservoir is completely or widely flooded, by comparing the morphological differences of the radar maps of the multi-ion content of the formation water between wells, combined with the geological and dynamic response characteristics between wells, the inter-well connectivity relationship is determined, and the water invasion path is clarified, providing a basis for the division of the gas reservoir drainage production well group and accurate drainage and production increase.

[0029] By the method of "analyzing the different ion compositions of formation water, innovatively using the radar map method to predict the water invasion channel, and draining and producing according to the water invasion path", the problems of difficult prediction of the water invasion mechanism and water invasion path in the D gas field are solved, effectively guiding the development of fine and accurate drainage work in the gas reservoir.

[0030] Through the drainage and production work according to the water invasion path, it is applied to the water invasion research in the D gas field, weak water invasion is identified in advance, countermeasures to mitigate water invasion are effectively carried out, and accurate drainage is implemented on the water invasion path of the gas field. Brief Description of the Drawings

[0031] Figure 1 It is a flow chart of the present invention.

[0032] Figure 2 It is a statistical chart of 4 types of formation water in the D gas field, which is an embodiment of the present invention.

[0033] Figure 3 It is a map for determining the water invasion path in the D gas field based on the formation water composition.

[0034] Figure 4 It is the tracer test well group and results in the D gas field.

[0035] Figure 5 It is the drainage and gas production effect diagram of adjacent wells D2-21 and D2-22 in D2-4 in the D gas field.

[0036] Figure 6 It is an embodiment diagram of the terminal device being a computer device.

[0037] Figure 7 It is an embodiment diagram of the terminal device being a chip. Detailed Embodiment

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0040] It should also be understood that the terms used in the specification of the present invention are merely for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0041] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally represents an "or" relationship between the contextually related objects.

[0042] It should be understood that although terms such as first, second, third, etc. may be used in the embodiments of the present invention to describe preset ranges, etc., these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0043] Depending on the context, the word "if" as used herein can be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detected (stated condition or event)" or "in response to detecting (stated condition or event)".

[0044] Schematic diagrams of various structures according to the disclosed embodiments of the present invention are shown in the drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures and their relative sizes and positional relationships are merely exemplary, and may actually deviate due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes and relative positions according to actual needs.

[0045] The present invention provides a method for predicting water invasion paths based on multi-ion analysis of formation water, including:

[0046] Obtain water sample ion concentration data, draw a multi-ion concentration radar chart, and establish a standard chart of condensate water and formation water radar charts based on the multi-ion concentration radar chart;

[0047] Obtain water samples during the production process of production wells, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to identify and warn of weak water invasion;

[0048] Obtain water samples from production wells with water invasion and weak water invasion, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to predict the water invasion path.

[0049] Specifically:

[0050] (1) Analysis of the differences between formation water and condensate water to establish a formation water identification chart

[0051] (1) Acquisition of water sample ion concentration data: Select representative water samples obtained from gas wells and water wells during well testing and production, conduct a full analysis experiment on the water sample components, and obtain various ion concentration data.

[0052] (2) Drawing of the multi-ion concentration radar chart of water samples: For each water sample, select 6 data of 7 important ions including Cl - , SO4 2- , HCO 3- , Ca 2+ , Mg 2+ , (K + +Na + ), normalize the ion concentration data, and try to ensure that the normalized ion concentration values are in the range of 1 to 10, and draw a multi-ion concentration radar chart.

[0053] (3) Establishment of the standard chart of condensate water and formation water radar charts: According to the analysis of the morphological differences between the radar charts of gas well and water well water samples, establish the standard chart of condensate water and formation water radar charts. If there are obvious differences in formation water in different vertical layers and different regions on the plane of the gas reservoir, different standard radar charts of formation water should be established by stratification and by region.

[0054] (2) Time-lapse analysis of the multi-ion radar chart to identify and warn of weak water invasion

[0055] (1) Drawing of the radar chart of the initial water sample of a single well: Timely record the effective water samples at the initial stage of production of production wells (gas wells, water-producing wells, water wells) (excluding the interference of external water bodies such as reservoir acidification and fracturing, and being the produced water under real formation conditions), conduct a full analysis test on the components, and draw a multi-ion concentration radar chart (radar chart of the initial water sample of a single well).

[0056] (2) Identification of the initial state of a single well: Compare the radar chart of the initial water sample of a single well with the standard radar chart of condensate water and formation water in the gas reservoir to qualitatively determine whether water invasion has occurred. If the radar chart of the initial water sample of a single well is consistent with the standard radar chart of condensate water in the gas reservoir, it indicates that the produced water from this well is condensate water and there is no initial water invasion. If the radar chart of the initial water sample of a single well is consistent with the standard radar chart of formation water in the gas reservoir, it indicates that the produced water from this well is formation water and water invasion has occurred initially. If the radar chart of the initial water sample of a single well is between the standard radar charts of condensate water and formation water in the gas reservoir, it indicates that the produced water from this well is a mixed water body of condensate water and formation water, and weak water invasion has occurred.

[0057] (3) Identification and early warning of weak water invasion in gas wells: Regularly collect water samples from gas wells without water invasion, conduct a comprehensive analysis of the water sample components, and draw a radar chart of multi-ion concentrations (radar chart of the production water sample of a single well). Then compare it with the radar chart of the initial water sample of this well. If the patterns are the same, there is no water invasion. If the pattern changes, promptly increase the frequency of water sample collection and analysis, draw a radar chart of ion concentrations. When the pattern gradually transitions to the standard radar chart of formation water in the gas reservoir, it is determined that weak water invasion has occurred in this well. Relevant departments and leaders should be reported in a timely manner and water control and stable production measures should be formulated.

[0058] (3) Analysis of the differences in the radar charts of formation water in multiple wells to predict the water invasion path

[0059] (1) For gas wells where water invasion and weak water invasion have been determined to occur, regularly collect formation water samples, conduct a comprehensive analysis of the formation water components, and draw a radar chart of multi-ion concentrations.

[0060] (2) Based on the comparative analysis of the radar charts of multi-ion concentrations of formation water in multiple wells, combined with the geological characteristics and production dynamic characteristics of a single well, judge the potential connectivity between wells and predict the water invasion path. If the patterns of the radar charts of multi-ions of formation water in adjacent wells are relatively consistent and are relatively consistent with the standard radar chart of formation water in this area of the gas reservoir; they are located within the same regional structure and the reservoir sand bodies are continuous; there is well interference during the production process, it indicates that they are invaded by the same formation water body and the wells are connected. Then, combined with the high and low positions of the structural location and the characteristics of fault development, determine the water invasion path.

[0061] By using the method of "analyzing the different ion compositions of formation water, innovatively using the radar chart method to predict the water invasion channel, and draining and producing through the water invasion path", the problems of difficult prediction of the water invasion mechanism and water invasion path in Gas Field D have been solved, effectively guiding the development of precise and accurate water drainage work in the gas reservoir.

[0062] Through the work of draining and producing through the water invasion path, applied to the water invasion research in Gas Field D, weak water invasion has been identified in advance, and effective countermeasures to slow down water invasion have been carried out. Precise water drainage has been implemented on the water invasion path of the gas field. It is predicted that the ultimate recovery rate of the gas reservoir will increase by 2.92%, with an accumulated increase in gas of 5.041 billion cubic meters; and an accumulated increase in oil of 0.3204 million tons.

[0063] The present invention can effectively support the comprehensive water control and drainage and production improvement work in water-bearing gas reservoirs, realizing scientific and efficient development. At the same time, it can also provide reference and guidance for the prediction of water invasion channels and drainage and production improvement work in the middle and late stages of development of other water-bearing gas fields.

[0064] Example:

[0065] (1) Analysis of multi-ion concentration radar charts and establishment of 4 standard chart plates for water types

[0066] Based on the full-analysis ion concentration data of formation water samples from gas wells in Gas Field D, 7 important ions, namely Cl - , SO4 2- , HCO 3- , Ca 2 + , Mg 2+ , (K + + Na + ) were selected for statistical analysis, and the formation water ion concentration radar chart was drawn.

[0067] According to the comparative analysis of the ion concentration radar chart, it was found that the ion concentration differences were mainly reflected in the ion concentrations of Cl - and HCO 3- . Based on this, the formation water was divided into high-concentration water types, low-concentration water types, and the transitional water type between the two. Considering the water type of condensate water in the gas field, the gas field water was divided into 4 types in total and a standard chart plate ( Figure 2 ) was established.

[0068] (2) Classification of each well based on the standard chart plate to determine the water invasion path of the gas reservoir

[0069] Ion concentration radar charts were drawn for the full-analysis data of formation water from 32 production wells and 608 well-times. According to the correlation statistics between the single-well ion concentration and the 4 standard radar charts, the water sample type of each well was determined (Table 1). Among them, 17 wells belonged to the high-concentration water type, 8 wells belonged to the low-concentration water type, 4 wells belonged to the transitional water type, and 3 wells belonged to the condensate water type.

[0070] Table 1 Statistical table of single-well formation water types in Gas Field D

[0071]

[0072]

[0073] Based on the comparative analysis of the ion concentration radar charts of single-well and adjacent-well formation water, combined with the single-well geological characteristics and production dynamic characteristics, 6 well groups with potential connectivity were finally determined, realizing the prediction of the water invasion path in Gas Field D. As Figure 3 shown.

[0074] (3) Verifying the prediction results of the water invasion path with tracers and draining the water invasion path

[0075] As Figure 4 shown, the tracer test results were used for verification. Tracer was injected into wells D2-28, D2-21, and D202, and the corresponding wells where the tracer was detected were D2-27, D2-22, D2-4, and D2-5. The connectivity relationship of the well group was determined, which was consistent with the water invasion path predicted based on the formation water ion composition, indicating that the method for predicting the water invasion path based on the formation water ion composition is reliable.

[0076] Based on the water invasion path predicted by the formation water ion composition, according to the current single-well production characteristics, water flooding status, and overall water invasion characteristics of the gas reservoir in the D Gas Field, the severity of water invasion of single wells in the gas reservoir was divided. Wells that were completely flooded on the water invasion path were preferably selected as drainage wells to protect the wells at high positions with water breakthrough risks. For example, the gas wells with the most serious water flooding and the highest risks in the gas reservoir are D2-4 and D2-2 wells currently. According to the prediction results of the water invasion path, it can be known that the formation water of the water breakthrough well D2-4 may come from wells D2-21 and D2-22 in the north; the water breakthrough risk well D2-2 is most likely invaded by the edge water of adjacent wells D2-28, D2-27, and D2-1 in the east. Therefore, a plan was formulated to increase the drainage volume of wells D2-21, D2-22, D2-1, and D2-27, improve the anhydrous gas production period of the gas wells, extend the water-bearing production period, and finally achieve drainage and production enhancement.

[0077] (4) Initial results achieved in draining the water invasion path of Well Group D2-4

[0078] As Figure 5 shown, initial results have been achieved in draining the water invasion path of Well Group D2-4 in the east. After strongly draining Well D2-22 in the north according to the water invasion path in mid-April, the tubing head pressure and daily gas production of Well D2-4 increased, and the daily water production decreased; in mid-August, Well D2-22 was sanded up, the daily drainage volume decreased, the daily water production of Well D2-4 increased, and the tubing head pressure dropped suddenly, and the measured daily gas production decreased; after increasing the drainage volume of Well D2-21 at the beginning of September, the tubing head pressure of Well D2-4 continued to rise, and the daily gas production was stable.

[0079] In one embodiment of the present invention, a system for predicting the water invasion path based on multi-ion analysis of formation water is provided. This system can be used to implement the above method for predicting the water invasion path based on multi-ion analysis of formation water. Specifically, the system includes:

[0080] A standard chart drawing module, which is used to obtain the water sample ion concentration data, draw a multi-ion concentration radar chart, and establish a standard chart of condensate water and formation water radar charts based on the multi-ion concentration radar chart;

[0081] A weak water invasion identification and early warning module, which is used to obtain water samples during the production process of production wells, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to identify and early warn of weak water invasion;

[0082] A prediction module, configured to obtain water samples of production wells with water breakthrough and weak water breakthrough, draw a radar chart of multi-ion concentrations, and compare it with a standard chart of a radar chart of condensate water and formation water to predict the water breakthrough path.

[0083] In one embodiment of the present invention, a terminal device is provided. The terminal device includes a processor and a memory. The memory is used to store a computer program. The computer program includes program instructions. The processor is used to execute the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, and is suitable for implementing one or more instructions. Specifically, it is suitable for loading and executing one or more instructions to implement the corresponding method flow or corresponding function. The processor described in the embodiment of the present invention can be used for the operation of a method for predicting the water breakthrough path based on the multi-ion analysis of formation water.

[0084] Please refer to Figure 6 , the terminal device is a computer device. The computer device 60 in this embodiment includes: a processor 61, a memory 62, and a computer program 63 stored in the memory 62 and executable on the processor 61. When the computer program 63 is executed by the processor 61, it implements the method for calculating the fluid composition in the reservoir reconstruction wellbore in the embodiment. To avoid repetition, it will not be elaborated here one by one. Alternatively, when the computer program 63 is executed by the processor 61, it implements the functions of each model / unit in the parallel operation optimization system of the mechanical and natural ventilation indirect cooling tower in the embodiment. To avoid repetition, it will not be elaborated here one by one.

[0085] The computer device 60 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The computer device 60 may include, but is not limited to, a processor 61 and a memory 62. Those skilled in the art can understand that Figure 5 merely examples of the computer device 60, which do not constitute a limitation on the computer device 60. It may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, the computer device may also include input / output devices, network access devices, a bus, etc.

[0086] The so-called processor 61 may be a Central Processing Unit (CPU), or other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0087] The memory 62 may be an internal storage unit of the computer device 60, such as the hard disk or memory of the computer device 60. The memory 62 may also be an external storage device of the computer device 60, such as a plug-in hard disk equipped on the computer device 60, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc.

[0088] Furthermore, the memory 62 may also include both the internal storage unit of the computer device 60 and the external storage device. The memory 62 is used to store computer programs and other programs and data required by the computer device. The memory 62 may also be used to temporarily store data that has been output or is to be output.

[0089] Please refer to Figure 7 , the terminal device is a chip. The chip 600 of this embodiment includes a processor 622, the number of which may be one or more, and a memory 632 for storing computer programs executable by the processor 622. The computer programs stored in the memory 632 may include one or more modules each corresponding to a set of instructions. In addition, the processor 622 may be configured to execute the computer program to perform the above-mentioned optimization method for parallel operation of mechanical and natural draft cooling towers.

[0090] In addition, the chip 600 may further include a power supply component 626 and a communication component 650. The power supply component 626 may be configured to perform power management of the chip 600, and the communication component 650 may be configured to implement communication of the chip 600, such as wired or wireless communication. In addition, the chip 600 may further include an input / output (I / O) interface 658. The chip 600 may operate based on an operating system stored in the memory 632.

[0091] In one embodiment of the present invention, the present invention further provides a storage medium, specifically a computer-readable storage medium (Memory). The computer-readable storage medium is a memory device in a terminal device, used to store programs and data. It can be understood that the computer-readable storage medium here can include both the built-in storage medium in the terminal device and, of course, the extended storage medium supported by the terminal device. The computer-readable storage medium provides a storage space, and the operating system of the terminal is stored in this storage space. And, one or more instructions suitable for being loaded and executed by a processor are also stored in this storage space. These instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory (Non-Volatile Memory), such as at least one disk memory.

[0092] One or more instructions stored in the computer-readable storage medium can be loaded and executed by a processor to implement the corresponding steps of the method for predicting the water invasion path based on multi-ion analysis of formation water in the above embodiment.

[0093] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiment and will not be elaborated here.

[0094] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0095] Those of ordinary skill in the art will realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in the present invention can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. A professional technician can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the present invention.

[0096] In the embodiments provided by the present invention, it should be understood that the disclosed device / terminal and method can be implemented in other ways. For example, the device / terminal embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical or other forms.

[0097] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0098] In addition, the functional units in each embodiment of the present invention can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0099] When the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-described embodiment methods of the present invention, it can also be completed by a computer program instructing relevant hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-described method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0100] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, and the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing device generate a device for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0101] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0102] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable apparatus to generate a computer-implemented process, thereby providing instructions for implementing the process Figure 1 in one process or multiple processes and / or blocks Figure 1 the steps of the functions specified in one block or multiple blocks.

[0103] The above is only to illustrate the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A method for predicting water invasion paths based on multi-ion analysis of formation water, characterized in that, Including: Obtain the ion concentration data of water samples, draw a multi-ion concentration radar chart, and establish a standard chart of condensate water and formation water radar charts based on the multi-ion concentration radar chart; Obtain the water samples during the production process of production wells, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to identify and warn of weak water invasion; Obtain the water samples of production wells with water invasion and weak water invasion, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to predict the water invasion path.

2. The method for predicting water invasion path based on multi-ion analysis of formation water according to claim 1, wherein Obtain the ion concentration data of water samples and draw a multi-ion concentration radar chart: Select representative water samples collected from gas wells and water wells during well testing and production processes, conduct full analysis experiments on the components of water samples, and obtain various ion concentration data; for each water sample, select Cl - , SO4 2- , HCO 3- , Ca 2+ , Mg 2+ , K + + Na + A total of 6 data for 7 important ions, normalize the ion concentration data to ensure that the normalized ion concentration values are within the range of 1 - 10, and draw a multi-ion concentration radar chart.

3. The method for predicting water invasion path based on multi-ion analysis of formation water according to claim 1, wherein Establish a standard chart of condensate water and formation water radar charts based on the multi-ion concentration radar chart: Based on the morphological differences analysis of the multi-ion concentration radar charts of gas well and water well water samples, establish a standard chart of condensate water and formation water radar charts; if there are obvious differences in formation water in different vertical intervals and different regions in the gas reservoir plane, different standard radar charts of formation water should be established by intervals and regions.

4. A method for predicting water invasion path based on multi-ion analysis of formation water according to claim 1, characterized in that, Obtain the water samples during the production process of production wells, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to identify and warn of weak water invasion: Collect effective water samples excluding external water bodies at the initial stage of production of production wells, conduct full-component analysis and testing, and draw a radar chart of the initial water sample of a single well; Compare the radar chart of the initial water sample of a single well with the standard charts of condensate water and formation water radar charts of the gas reservoir to qualitatively determine whether there is water invasion: if the morphology of the radar chart of the initial water sample of a single well is consistent with the standard chart of condensate water radar chart of the gas reservoir, it indicates that the produced water of this well is condensate water and there is no initial water invasion; if the morphology of the radar chart of the initial water sample of a single well is consistent with the standard chart of formation water radar chart of the gas reservoir, it indicates that the produced water of this well is formation water and there has been initial water invasion; if the morphology of the radar chart of the initial water sample of a single well is between the standard charts of condensate water and formation water radar charts of the gas reservoir, it indicates that the produced water of this well is a mixed water body of condensate water and formation water and there has been weak water invasion.

5. The method for predicting water invasion path based on multi-ion analysis of formation water according to claim 4, wherein Regularly collect water samples of gas wells without water invasion, conduct full-component analysis of the water samples, draw a radar chart of the production water sample of a single well, and compare it with the radar chart of the initial water sample of this well. If the morphology is the same, there is no water invasion; If the morphology changes, promptly increase the frequency of water sample collection and analysis and testing, draw an ion concentration radar chart. When the morphology gradually transitions to the standard chart of formation water radar chart of the gas reservoir, it is determined that weak water invasion has occurred in this well.

6. The method for predicting water invasion path based on multi-ion analysis of formation water according to claim 1, wherein Obtain the water samples of production wells with water invasion and weak water invasion, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to predict the water invasion path: For gas wells that have been determined to have water invasion and weak water invasion, regularly collect formation water samples, conduct full-component analysis of the formation water, and draw a multi-ion concentration radar chart; Based on the comparative analysis of the multi-well formation water ion concentration radar charts, combined with the geological characteristics and production dynamic characteristics of a single well, judge the potential connectivity relationship between wells and predict the water invasion path.

7. A method for predicting water invasion path based on multi-ion analysis of formation water according to claim 6, characterized in that, If the morphology of the multi-ion radar charts of formation water in adjacent wells is the same and coincides with the standard radar chart of formation water in this area of the gas reservoir; located within the same regional structure, the reservoir sand bodies are continuous; there is well interference during the production process, it indicates that they have the same formation water intrusion and the wells are connected. Then, combined with the high and low of the structural position and the fracture development characteristics, determine the water invasion path.

8. A system for predicting water invasion paths based on multi-ion analysis of formation water, characterized in that, Including: A standard chart drawing module, configured to obtain water sample ion concentration data, draw a multi-ion concentration radar chart, and establish a standard chart of condensate water and formation water radar charts based on the multi-ion concentration radar chart; A weak water invasion identification and warning module, configured to obtain water samples during the production process of production wells, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts for weak water invasion identification and warning; A prediction module, configured to obtain water samples of production wells with water invasion and weak water invasion, draw a multi-ion concentration radar chart and compare it with the standard chart of condensate water and formation water radar charts to predict the water invasion path.

9. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method for predicting water invasion path based on multi-ion analysis of formation water according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for predicting water invasion path based on multi-ion analysis of formation water according to any one of claims 1 to 7.

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