Trajectory correction method, azimuth gamma probe and well logging instrument

Abstract

The present application relates to a trajectory correction method, an azimuth gamma probe and a well logging instrument. The method includes continuously acquiring the generated current value signals and grouping the current value signals according to the generation time of the current value signals to obtain a current value signal group; verifying each group of current value signals and retaining the current value signal group that has passed the verification; using the current value signal group to model the surrounding environment to obtain a surrounding environment model; finding a strong signal area on the surrounding environment model; and correcting the drilling direction of the well logging instrument according to the strong signal area. The azimuth gamma probe includes the above method, and the well logging instrument includes the above azimuth gamma probe. The trajectory correction method, azimuth gamma probe and well logging instrument disclosed in the present application screen the received signals by mutually verifying the received signals, and then use the modeling analysis method to correct the moving trajectory of the well logging instrument, which has more advantages in data processing speed and data processing accuracy.

Description

Technical Field

[0001] The present application relates to the technical field of data processing, and in particular to a trajectory correction method, an azimuth gamma probe and a well logging instrument. Background Art

[0002] The azimuth gamma-ray probe is a geophysical prospecting method that uses the gamma rays emitted by the decay of natural radioactive elements in the earth's crust to find radioactive deposits and solve related geological problems. It is also an auxiliary means to find deposits of rare elements, rare earth elements and polymetallic elements that coexist with radioactive elements.

[0003] The azimuth gamma probe is deployed inside the logging instrument, and works with the wellbore attitude measurement unit to provide forward data support and correction for the moving trajectory of the logging instrument. This is because in the underground environment, direction judgment and adjustment can only be made by relying on the return data from the logging instrument.

[0004] In the past few years, more and more high-temperature and high-pressure (HPHT) oil fields have been explored and developed around the world. The reservoirs of these oil fields often have very high temperature and pressure gradients (estimated or measured bottom hole temperature greater than 150°C and bottom hole pressure greater than 10kpsi).

[0005] The sudden increase in temperature and pressure has put forward higher requirements on logging instruments (including internal azimuth gamma probes, wellbore attitude measurement units, etc.). On the one hand, higher accuracy needs to be provided in data processing, and on the other hand, higher anti-interference capabilities are required. Summary of the invention

[0006] The present application provides a trajectory correction method, an azimuth gamma probe and a logging instrument, which screen the received signals by mutual verification, and then use modeling analysis to correct the moving trajectory of the logging instrument, which has advantages in data processing speed and data processing accuracy.

[0007] The above-mentioned purpose of the present application is achieved through the following technical solutions:

[0008] In a first aspect, the present application provides a trajectory correction method, comprising:

[0009] Continuously acquiring the generated current value signals and grouping the current value signals according to the generation time of the current value signals to obtain current value signal groups, wherein the current value signals in each current value signal group are from different current signal generation units;

[0010] Verify each group of current value signals, and retain the current value signal groups that pass the verification;

[0011] Modeling the surrounding environment using the current value signal group to obtain a surrounding environment model;

[0012] Find strong signal areas on the surrounding environment model;

[0013] Correct the drilling direction of the logging tool according to the strong signal area.

[0014] In a possible implementation manner of the first aspect, verifying each group of current value signals includes:

[0015] Acquire the value of each current value signal in a current value signal group and the angular position of the current signal generating unit corresponding to the current value signal;

[0016] Randomly selecting two current value signals from the current value signal group;

[0017] Calculating a value ratio and a position ratio of the two current value signals;

[0018] Calculating a corresponding relationship ratio between the numerical ratio and the position ratio;

[0019] The corresponding relationship ratio of any two current value signals in the current value signal group should be within the set interval.

[0020] In a possible implementation manner of the first aspect, when the corresponding relationship ratio of at least one pair of current value signals is outside a set interval, the method further includes:

[0021] Performing alternate shielding processing on the current value signals whose corresponding relationship ratios with the current value signals are outside the set interval and verifying the remaining current value signals in the current value signal group;

[0022] When the number of the residual current value signals is greater than or equal to the set number and the corresponding relationship ratios of the residual current value signals are all within the set interval, the current value signal group is retained and the shielded current value signals are deleted.

[0023] In a possible implementation manner of the first aspect, using the current value signal group to model the surrounding environment includes:

[0024] constructing data points according to directions, positions and values ​​of current value signals in the current value signal group;

[0025] Modeling is performed using the data points to obtain a first three-dimensional channel;

[0026] Obtaining a blank area on the first three-dimensional channel and filling the blank area to obtain a second three-dimensional channel;

[0027] When the blank area is filled, the azimuth gamma probe keeps rotating but stops moving.

[0028] In a possible implementation manner of the first aspect, finding a strong signal area on the surrounding environment model includes:

[0029] Dividing the second three-dimensional channel into a plurality of regions, each region having an equal area;

[0030] Count the spur parameters in each area, including the number and concentration;

[0031] Sort the regions according to the spur parameters;

[0032] The first one or first several regions in the sequential sequence are regarded as strong signal regions.

[0033] In a possible implementation manner of the first aspect, the method further includes:

[0034] determining the pointing direction of the strong signal area and drawing a directional straight line based on the pointing direction on the second three-dimensional channel;

[0035] Determine the convergence area of ​​the directional straight lines and use the convergence area as the advancing direction of the azimuth gamma probe;

[0036] When the convergence area cannot be formed, the curvature of the trajectory of the azimuth gamma probe is reduced.

[0037] In a possible implementation manner of the first aspect, determining the direction of the strong signal area includes:

[0038] Count the direction of the spikes in each area;

[0039] The spurs belonging to the same area are grouped according to the pointing direction to obtain spur groups;

[0040] Discard the spurs that do not meet the length requirements in each spur group, and discard the spur groups whose spur amount is less than or equal to the set number;

[0041] Assigning a directional direction to each of the remaining stab groups, the directional direction being the directional direction of the stabs in the stab group;

[0042] Each of the remaining spur groups has at least one pointing direction.

[0043] In a possible implementation manner of the first aspect, reducing the curvature of the trajectory of the azimuth gamma probe includes:

[0044] Determine the positions of a plurality of strong signal areas whose positional relationship is sequentially adjacent, and the distance between any two strong signal areas is greater than or equal to the required distance;

[0045] using corresponding areas of the plurality of strong signal areas as adjustment track areas;

[0046] Constructing multiple virtual track lines in the adjustment track area, each virtual track line has a different curvature radius, and the curvature radius of the virtual track line tends to increase in the order sequence;

[0047] The azimuth gamma probe is driven to sequentially pass through each virtual track line, and when the data points generated by the virtual track line cannot obtain a collection area, the subsequent virtual track lines in the sequential sequence are stopped.

[0048] In a second aspect, the present application provides a trajectory correction device, comprising:

[0049] a first signal processing unit, configured to continuously acquire the generated current value signals and group the current value signals according to the generation time of the current value signals to obtain current value signal groups, wherein the current value signals in each current value signal group are from different current signal generating units;

[0050] A second signal processing unit, used for verifying each group of current value signals and retaining the current value signal groups that pass the verification;

[0051] A modeling unit, used to model the surrounding environment using the current value signal group to obtain a surrounding environment model;

[0052] A third signal processing unit, used for finding a strong signal area on the surrounding environment model;

[0053] The correction unit is used to correct the drilling direction of the logging instrument according to the strong signal area.

[0054] In a third aspect, the present application provides an azimuth gamma probe, the azimuth gamma probe comprising:

[0055] one or more memories for storing instructions; and

[0056] One or more processors, used to call and run the instructions from the memory to execute the method as described in the first aspect and any possible implementation of the first aspect.

[0057] In a fourth aspect, the present application provides a well logging instrument, comprising the azimuth gamma probe as described in the third aspect.

[0058] In a fifth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium comprises:

[0059] Program, when the program is executed by a processor, the method described in the first aspect and any possible implementation of the first aspect is executed.

[0060] In a sixth aspect, the present application provides a computer program product, comprising program instructions. When the program instructions are executed by a computing device, the method described in the first aspect and any possible implementation of the first aspect is executed.

[0061] In a seventh aspect, the present application provides a chip system comprising a processor for implementing the functions involved in the above aspects, for example, generating, receiving, sending, or processing the data and / or information involved in the above methods.

[0062] The chip system may be composed of chips, or may include chips and other discrete devices.

[0063] In a possible design, the chip system also includes a memory, which is used to store necessary program instructions and data. The processor and the memory can be decoupled and respectively set on different devices, connected by wired or wireless means, or the processor and the memory can also be coupled on the same device. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 It is a schematic block diagram of the steps of a trajectory correction method provided by the present application.

[0065] Figure 2 This is a schematic diagram of converting gamma rays into electrical signals provided by the present application.

[0066] Figure 3 This is a schematic diagram of the relative positions of multiple photomultiplier tubes and crystals provided in the present application.

[0067] Figure 4 It is a cross-sectional schematic diagram of a surrounding environment model provided by the present application, and the cross section is a section along the trajectory.

[0068] Figure 5 It is a schematic diagram of expanding the surrounding environment model provided by the present application.

[0069] Figure 6 It is a schematic diagram of a blank area in the circumferential direction of a first three-dimensional channel provided in the present application.

[0070] Figure 7 This is a schematic diagram of unfolding a first three-dimensional channel provided by the present application.

[0071] Figure 8 This is a schematic diagram of the relative positions of a direction line and a trajectory provided by the present application.

[0072] Fig. 9 This is another schematic diagram of the relative positions of a directional straight line and a trajectory provided by the present application. DETAILED DESCRIPTION

[0073] The technical solution in this application is further described in detail below in conjunction with the accompanying drawings.

[0074] The trajectory correction method disclosed in the present application is applied to the azimuth gamma probe in the logging instrument. The azimuth gamma probe receives gamma signals in the surrounding environment and then converts these gamma signals into current signals. By analyzing the parameters such as the azimuth, value and time of the received signal, specific information about the surrounding environment of the logging instrument and the environment within the survey distance can be indirectly obtained.

[0075] For some examples, see Figure 1 , the trajectory correction method disclosed in the present application comprises the following steps:

[0076] S101, continuously acquiring the generated current value signals and grouping the current value signals according to the generation time of the current value signals to obtain current value signal groups, wherein the current value signals in each current value signal group are from different current signal generation units;

[0077] S102, verifying each group of current value signals, and retaining the current value signal groups that pass the verification;

[0078] S103, using the current value signal group to model the surrounding environment to obtain a surrounding environment model;

[0079] S104, a strong signal area is found on the surrounding environment model;

[0080] S105, correcting the drilling direction of the logging tool according to the strong signal area.

[0081] The azimuth gamma probe enters the underground along with the logging instrument. During the moving process, it will continuously obtain the generated current value signals and group the current value signals according to the generation time of the current value signals. The grouping will obtain current value signal groups. At this time, for the current value signals in each current value signal group, these current value signals are required to come from different current signal generating units.

[0082] See also Figure 2 It should be understood that the working principle of the azimuth gamma probe in the present application is to use the gamma rays existing in the external environment to excite the crystal to generate a light signal, and then convert the light signal (with the help of a photomultiplier tube) into an electrical signal, and the intensity of the electrical signal is positively correlated with the intensity of the light signal.

[0083] See also Figure 3 The azimuth gamma probe used in this application is equipped with multiple photomultiplier tubes, and the angle between these photomultiplier tubes and the crystal is ( Figure 3When the crystal generates a light signal, the deployed photomultiplier tubes can convert it into an electrical signal, but the intensity of the electrical signal will change with the angle between the photomultiplier tube and the crystal. The specific change is that the intensity of the electrical signal decreases as the angle between the photomultiplier tube and the crystal decreases.

[0084] In step S102, each group of current value signals is verified, and the current value signal groups that pass the verification are retained, and the current value signal groups that fail the verification are discarded.

[0085] It should be understood that in the face of high temperature and high pressure environment, the azimuth gamma probe used in this application will inevitably produce interference, which may be expressed in the current value signal group, so each group of current value signals needs to be verified. The specific verification method is as follows:

[0086] Acquire the value of each current value signal in a current value signal group and the angular position of the current signal generating unit corresponding to the current value signal;

[0087] Randomly selecting two current value signals from the current value signal group;

[0088] Calculating a value ratio and a position ratio of the two current value signals;

[0089] Calculating a corresponding relationship ratio between the numerical ratio and the position ratio;

[0090] The corresponding relationship ratio of any two current value signals in the current value signal group should be within the set interval.

[0091] The specific principle of the verification method is that the intensity of the electrical signal decreases as the angle between the photomultiplier tube and the crystal decreases, that is, the ratio of the values ​​of the two current value signals is related to the ratio of the angle between the corresponding photomultiplier tube and the crystal. The coefficient K is introduced here, and the specific formula is as follows:

[0092] The ratio of the values ​​of the two current value signals = K*the ratio of the angles between the photomultiplier tube and the crystal corresponding to the two current value signals.

[0093] Any two current value signals in a current value signal group need to satisfy the above relationship, otherwise the current value signal group needs to be discarded.

[0094] Of course, there may be a situation where the signal is actually real but there is an acquisition error. For this situation, the specific processing method is as follows:

[0095] Performing alternate shielding processing on the current value signals whose corresponding relationship ratios with the current value signals are outside the set interval and verifying the remaining current value signals in the current value signal group;

[0096] When the number of the residual current value signals is greater than or equal to the set number and the corresponding relationship ratios of the residual current value signals are all within the set interval, the current value signal group is retained and the shielded current value signals are deleted.

[0097] The above processing method can be summarized as shielding the abnormal current value signal, and if the remaining current value signals in the current value signal group still meet the verification method, retaining the current value signal group.

[0098] At that time, it is necessary to meet the requirement that the number of residual current value signals is greater than or equal to the set number. The set number here is a fixed value and needs to be determined according to the number of photomultiplier tubes. Generally speaking, the set number is the number of photomultiplier tubes minus one or two.

[0099] In step S103, the current value signal group is used to model the surrounding environment to obtain a surrounding environment model, such as Figure 4 and Figure 5 As shown, the surrounding environment model reflects the intensity distribution of gamma rays in the surrounding environment. It should be noted here that the surrounding environment model cannot reflect the distance because the location of the gamma ray cannot be determined by the current value corresponding to the gamma ray.

[0100] In step S104, a strong signal area needs to be found on the surrounding environment model. The strong signal area indicates that there are strong gamma rays in the direction corresponding to the area, and the area can be listed as a key inspection area or a suspected storage area.

[0101] In step S105, the drilling direction of the logging instrument is corrected according to the strong signal area. The specific correction method is to adjust the drilling direction to move toward the direction corresponding to the strong signal area or move around the direction area corresponding to the strong signal area.

[0102] In general, the trajectory correction method provided in the present application will group and verify the current value signals after receiving the current value signals, and the current value signals that do not meet the requirements will be discarded, so as to avoid the subsequent interference of these current value signals that do not meet the requirements on the calculation.

[0103] After the current value signals are screened and processed, they are used to build a surrounding environment model and find strong signal areas. Finally, the forward direction of the logging instrument is adjusted according to the pointing direction of the strong signal area.

[0104] Because the forward direction of the logging instrument is also adjusted according to the feedback from various data collectors, the trajectory correction method provided in the present application can enable the logging instrument to move forward or approach the target area as much as possible during the forward process.

[0105] In some examples, modeling the surrounding environment using the current value signal group includes:

[0106] S201, constructing data points according to the direction, position and value of the current value signal in the current value signal group;

[0107] S202, using the data points to perform modeling to obtain a first three-dimensional channel;

[0108] S203, obtaining a blank area on the first three-dimensional channel and filling the blank area to obtain a second three-dimensional channel;

[0109] When the blank area is filled, the azimuth gamma probe keeps rotating but stops moving.

[0110] Specifically, the direction, position and value of the current value signal are needed to construct data points. The direction here refers to the direction of the acquisition window when the gamma ray corresponding to the current value signal is received; the position refers to the current location of the logging instrument; and the value refers to the magnitude of the current value signal.

[0111] Here, the current position of the logging instrument is obtained according to the movement parameters (direction, travel speed) of the logging instrument. The movement trajectory of the logging instrument can be a curve generated in three-dimensional space according to the movement parameters of the logging instrument.

[0112] The direction, position and value of the current value signal can be used to construct data points, and then these data points are used for modeling to obtain the first three-dimensional channel. The first three-dimensional channel obtained at this time can be regarded as a plane composed of multiple points.

[0113] See also Figure 6 and Figure 7 Regarding this plane, in the process of fitting using points, it is necessary to calculate the number of data points per unit area. When the number of data points per unit area is insufficient, the data points at that position will not be fitted, and a so-called blank area will be formed.

[0114] The blank areas need to be filled. The filling method is that the azimuth gamma probe keeps rotating but stops moving at the corresponding position of the blank area. When the blank area at that position is filled, the azimuth gamma probe moves to the next or next few blank areas to fill until all the blank areas on the first three-dimensional channel are filled.

[0115] In some examples, the specific steps for finding strong signal areas on the surrounding environment model are as follows:

[0116] S301, dividing the second three-dimensional channel into a plurality of regions, each of which has an equal area;

[0117] S302, counting the spur parameters in each area, the spur parameters including quantity and concentration;

[0118] S303, sorting the regions according to the stab parameters;

[0119] S304: The first one or first several regions in the sequential sequence are regarded as strong signal regions.

[0120] In step S301 to step S304, it is necessary to first divide the second three-dimensional channel into multiple regions, each of which has an equal area, and then count the spur parameters on each region. The spur on the region here refers to the raised area formed by the data points during the fitting process, and the shape of the raised area is similar to a cone.

[0121] The spur parameters on the region include quantity and concentration. The quantity here represents the number of spurs on a region, and the concentration represents the areas where spurs are concentrated on a region. In the sorting process, the number is first sorted. At this time, the number of spurs in the region decreases in sequence, and the regions whose spurs do not meet the requirements are discarded.

[0122] In the judgment condition that the number of spurs does not meet the requirement, a fixed value is used. When the number of spurs in an area is less than the fixed value, it needs to be discarded.

[0123] Then, the clustering degree is used for secondary sorting. At this time, the clustering degree of the spikes in the region increases in sequence. Because the smaller the clustering degree of the spikes in a region, that is, the smaller the number of clustered regions, the more concentrated the gamma signals corresponding to the spikes in the region are.

[0124] Finally, the first one or first several regions in the sequential sequence (sorted by aggregation) are selected as strong signal regions.

[0125] Furthermore, the following contents are added:

[0126] S305, determining the pointing direction of the strong signal area and drawing a directional straight line based on the pointing direction on the second three-dimensional channel;

[0127] S306, determining a convergence area of ​​the directional straight lines and using the convergence area as a forward direction of the azimuth gamma probe;

[0128] When the convergence area cannot be formed, the curvature of the trajectory of the azimuth gamma probe is reduced.

[0129] In step S305 and step S306, a direction line based on the pointing direction of the strong signal area will be drawn on the second three-dimensional channel, and then the forward direction of the azimuth gamma probe will be adjusted according to the convergence area of ​​the direction lines. The specific adjustment method is to use the convergence area as the forward direction of the azimuth gamma probe.

[0130] Because when the directional straight lines converge to an area, it means that there is a possibility of gamma rays being produced in that area, so the azimuth gamma probe needs to move toward that area.

[0131] contrast Figure 8 and Fig. 9 When a convergence area cannot be formed, it is necessary to reduce the curvature of the trajectory of the azimuth gamma probe. The purpose of the reduction is to reduce the coverage area of ​​the azimuth gamma probe, thereby determining whether there is an area generating gamma rays in the coverage area.

[0132] The specific method for determining the direction of the strong signal area is as follows:

[0133] S401, counting the direction of the spurs in each area;

[0134] S402, grouping the spurs belonging to the same area according to their pointing directions to obtain spur groups;

[0135] S403, discarding the spurs in each spur group whose length does not meet the requirement, and discarding the spur groups whose spur amount is less than or equal to the set number;

[0136] S404, assigning a directional direction to each of the remaining stab groups, where the directional direction is the directional direction of the stabs in the stab group;

[0137] Each of the remaining spur groups has at least one pointing direction.

[0138] The contents of step S401 to step S404 are mainly based on the fact that the logging instrument is in an unstable state during rotation, or it can be expressed as the motion state of the axis of the logging instrument during rotation is a combination of rotation and swing. This results in differences in the pointing directions of the spurs in each area, so additional processing is required.

[0139] After counting the directional directions of the spikes in each area, the spikes belonging to the same area will be grouped according to the directional directions, and each area will have at least one spike group.

[0140] Then, the spurs in each spur group whose length does not meet the requirements are discarded, and the spur groups whose spur amount is less than or equal to the set number are discarded. The purpose of this method is to screen the spurs and obtain spur groups whose length and quantity meet the requirements.

[0141] In some possible implementations, the lengths and quantities in the above methods are both set values.

[0142] Finally, a pointing direction is assigned to each of the remaining stab groups, where the pointing direction is the pointing direction of the stabs in the stab group.

[0143] In some examples, the specific processing method for reducing the curvature of the trajectory of the azimuth gamma probe is as follows:

[0144] S501, determining the positions of a plurality of strong signal areas whose positional relationship is sequentially adjacent, and the distance between any two strong signal areas is greater than or equal to a required distance;

[0145] S502, using corresponding areas of the plurality of strong signal areas as adjustment track areas;

[0146] S503, constructing a plurality of virtual track lines in the adjustment track area, wherein the curvature radius of each virtual track line is different, and in a sequential order, the curvature radius of the virtual track line tends to increase;

[0147] S504, driving the azimuth gamma probe to sequentially pass through each virtual track line, and when the data points generated by the virtual track line cannot obtain a collection area, stopping passing through the subsequent virtual track lines in the sequential sequence.

[0148] The content of step S501 to step S504 is to first determine the positions of multiple associated strong signal areas. These strong signal areas need to meet the condition that the distance between any two strong signal areas is greater than or equal to the required distance.

[0149] Then, the corresponding areas of the multiple strong signal areas are used as adjustment trajectory areas, and then multiple virtual trajectory lines are generated in the adjustment trajectory area. These virtual trajectory lines are in sequence, and the curvature radius of the virtual trajectory lines tends to increase. Finally, the azimuth gamma probe is driven to pass through each virtual trajectory line in sequence. When the data points generated by the virtual trajectory line cannot obtain a collection area, the subsequent virtual trajectory lines in the sequential sequence are stopped.

[0150] In this way, there is a certain probability of obtaining the collection area.

[0151] The present application also provides a trajectory correction device, comprising:

[0152] a first signal processing unit, configured to continuously acquire the generated current value signals and group the current value signals according to the generation time of the current value signals to obtain current value signal groups, wherein the current value signals in each current value signal group are from different current signal generating units;

[0153] A second signal processing unit, used for verifying each group of current value signals and retaining the current value signal groups that pass the verification;

[0154] A modeling unit, used to model the surrounding environment using the current value signal group to obtain a surrounding environment model;

[0155] A third signal processing unit, used for finding a strong signal area on the surrounding environment model;

[0156] The correction unit is used to correct the drilling direction of the logging instrument according to the strong signal area.

[0157] Furthermore, it also includes:

[0158] A data acquisition unit, used to acquire the value of each current value signal in a current value signal group and the angular position of the current value signal corresponding to the current signal generating unit;

[0159] A data selection unit, used for randomly selecting two current value signals from the current value signal group;

[0160] A first calculation unit, used for calculating a numerical ratio and a position ratio of the two current value signals;

[0161] A second calculation unit, used for calculating a corresponding relationship ratio between the numerical ratio and the position ratio;

[0162] The corresponding relationship ratio of any two current value signals in the current value signal group should be within the set interval.

[0163] Furthermore, it also includes:

[0164] A first data screening unit, used for performing alternate masking processing on the current value signals associated with the corresponding relationship ratios of the current value signals being outside the set interval and verifying the remaining current value signals in the current value signal group;

[0165] The second data screening unit is used to retain the current value signal group and delete the shielded current value signal when the number of the residual current value signals is greater than or equal to the set number and the corresponding relationship ratios of the residual current value signals are all within the set interval.

[0166] Furthermore, it also includes:

[0167] A first constructing unit, configured to construct a data point according to a direction, a position and a value of a current value signal in the current value signal group;

[0168] A second construction unit is used to perform modeling using the data points to obtain a first three-dimensional channel;

[0169] A third construction unit is used to obtain a blank area on the first three-dimensional channel and fill the blank area to obtain a second three-dimensional channel;

[0170] When the blank area is filled, the azimuth gamma probe keeps rotating but stops moving.

[0171] Furthermore, it also includes:

[0172] A region division unit, used for dividing the second three-dimensional channel into a plurality of regions, each of which has an equal area;

[0173] The first statistical unit is used to count the spur parameters in each area, and the spur parameters include quantity and concentration;

[0174] A sorting unit, for sorting the regions according to the spurting parameters;

[0175] The selection unit is used to select the first one or first several regions on the sequential sequence as strong signal regions.

[0176] Furthermore, it also includes:

[0177] A first processing unit, used for determining the pointing direction of the strong signal area and drawing a directional straight line based on the pointing direction on the second three-dimensional channel;

[0178] A second processing unit is used to determine a convergence area of ​​the directional straight lines and use the convergence area as a forward direction of the azimuth gamma probe;

[0179] When the convergence area cannot be formed, the curvature of the trajectory of the azimuth gamma probe is reduced.

[0180] Furthermore, it also includes:

[0181] The second statistical unit is used to count the direction of the spurs in each area;

[0182] A grouping unit, used for grouping the spurs belonging to the same area according to the pointing directions to obtain spur groups;

[0183] The third processing unit is used to discard the spurs whose length does not meet the requirements in each spur group, and discard the spur groups whose spur amount is less than or equal to a set number;

[0184] a fourth processing unit, configured to assign a directional direction to each of the remaining stab groups, wherein the directional direction is a directional direction of the stabs in the stab group;

[0185] Each of the remaining spur groups has at least one pointing direction.

[0186] Furthermore, it also includes:

[0187] A fifth processing unit, used to determine the positions of a plurality of strong signal areas whose positional relationship is sequentially adjacent, and the distance between any two strong signal areas is greater than or equal to a required distance;

[0188] A sixth processing unit, configured to use corresponding areas of the plurality of strong signal areas as adjustment track areas;

[0189] A virtual track line construction unit is used to construct multiple virtual track lines in the adjustment track area, each virtual track line has a different curvature radius, and the curvature radius of the virtual track line tends to increase in the sequential order;

[0190] The track adjustment unit is used to drive the azimuth gamma probe to sequentially pass through each virtual track, and when the data points generated by the virtual track cannot obtain a collection area, stop passing through the subsequent virtual track in the sequence.

[0191] In one example, the unit in any of the above devices can be one or more integrated circuits configured to implement the above methods, such as: one or more application specific integrated circuits (ASICs), or, one or more digital signal processors (DSPs), or, one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0192] For another example, when the units in the device can be implemented in the form of a processing element scheduling program, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call a program. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0193] Various objects such as various messages / information / equipment / network elements / systems / devices / actions / operations / processes / concepts that may appear in this application are named. It can be understood that these specific names do not constitute a limitation on the relevant objects. The names assigned may change with factors such as scenarios, contexts or usage habits. The understanding of the technical meaning of the technical terms in this application should be mainly determined from the functions and technical effects embodied / executed in the technical scheme.

[0194] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0195] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0196] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0197] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0198] It should also be understood that in various embodiments of the present application, the first, second, etc. are only used to indicate that multiple objects are different. For example, the first time window and the second time window are only used to indicate different time windows. They should not have any impact on the time window itself, and the first, second, etc. mentioned above should not impose any limitations on the embodiments of the present application.

[0199] It should also be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0200] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a computer-readable storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned computer-readable storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0201] The present application also provides an azimuth gamma probe, the azimuth gamma probe comprising:

[0202] one or more memories for storing instructions; and

[0203] One or more processors are used to call and run the instructions from the memory to execute the method as described in the above content.

[0204] The present application also provides a well logging instrument, including the azimuth gamma probe as described above.

[0205] The present application also provides a computer program product, which includes instructions. When the instructions are executed, the azimuth gamma probe and the well logging tool perform operations corresponding to the azimuth gamma probe and the well logging tool of the above method.

[0206] The present application also provides a chip system, which includes a processor for implementing the functions involved in the above content, such as generating, receiving, sending, or processing the data and / or information involved in the above method.

[0207] The chip system may be composed of chips, or may include chips and other discrete devices.

[0208] The processor mentioned in any of the above places can be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for executing programs for controlling the above-mentioned feedback information transmission method.

[0209] In a possible design, the chip system also includes a memory, which is used to store necessary program instructions and data. The processor and the memory can be decoupled and respectively set on different devices, connected by wire or wireless means to support the chip system to implement various functions in the above embodiments. Alternatively, the processor and the memory can also be coupled on the same device.

[0210] Optionally, the computer instructions are stored in a memory.

[0211] Optionally, the memory is a storage unit within the chip, such as a register, a cache, etc. The memory can also be a storage unit within the terminal located outside the chip, such as a ROM or other types of static storage devices that can store static information and instructions, RAM, etc.

[0212] It can be understood that the memory in the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories.

[0213] The non-volatile memory may be a ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), or a flash memory.

[0214] The volatile memory may be a RAM, which is used as an external cache. There are many different types of RAM, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct memory bus random access memory.

[0215] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A trajectory correction method, characterized in that: include: Continuously acquiring the generated current value signals and grouping the current value signals according to the generation time of the current value signals to obtain current value signal groups, wherein the current value signals in each current value signal group are from different current signal generation units; Verify each group of current value signals, and retain the current value signal groups that pass the verification; Modeling the surrounding environment using the current value signal group to obtain a surrounding environment model; Find strong signal areas on the surrounding environment model; Correct the drilling direction of the logging tool according to the strong signal area; Verification of each set of current value signals includes: Acquire the value of each current value signal in a current value signal group and the angular position of the current signal generating unit corresponding to the current value signal; Randomly selecting two current value signals from the current value signal group; Calculating a value ratio and a position ratio of the two current value signals; Calculating a corresponding relationship ratio between the numerical ratio and the position ratio; The corresponding relationship ratio of any two current value signals in the current value signal group should be within the set interval.

2. The trajectory correction method according to claim 1, characterized in that: When the corresponding relationship ratio of at least one pair of current value signals is outside the set interval, the method further includes: Performing alternate shielding processing on the current value signals whose corresponding relationship ratios with the current value signals are outside the set interval and verifying the remaining current value signals in the current value signal group; When the number of the residual current value signals is greater than or equal to the set number and the corresponding relationship ratios of the residual current value signals are all within the set interval, the current value signal group is retained and the shielded current value signals are deleted.

3. The trajectory correction method according to any one of claims 1 or 2, characterized in that: Modeling the surrounding environment using the current value signal group includes: constructing data points according to directions, positions and values ​​of current value signals in the current value signal group; Modeling is performed using the data points to obtain a first three-dimensional channel; Obtaining a blank area on the first three-dimensional channel and filling the blank area to obtain a second three-dimensional channel; When the blank area is filled, the azimuth gamma probe keeps rotating but stops moving.

4. The trajectory correction method according to claim 3, characterized in that: Areas with strong signals found on the surrounding environment model include: Dividing the second three-dimensional channel into a plurality of regions, each region having an equal area; Count the spur parameters in each area, including the number and concentration; Sort the regions according to the spur parameters; The first one or first several regions in the sequential sequence are regarded as strong signal regions.

5. The trajectory correction method according to claim 4, characterized in that: Also includes: determining the pointing direction of the strong signal area and drawing a directional straight line based on the pointing direction on the second three-dimensional channel; Determine the convergence area of ​​the directional straight lines and use the convergence area as the advancing direction of the azimuth gamma probe; When the convergence area cannot be formed, the curvature of the trajectory of the azimuth gamma probe is reduced.

6. The trajectory correction method according to claim 5, characterized in that: Determining the direction of a strong signal area includes: Count the direction of the spikes in each area; The spurs belonging to the same area are grouped according to the pointing direction to obtain spur groups; Discard the spurs that do not meet the length requirements in each spur group, and discard the spur groups whose spur amount is less than or equal to the set number; Assigning a directional direction to each of the remaining stab groups, the directional direction being the directional direction of the stabs in the stab group; Each of the remaining spur groups has at least one pointing direction.

7. The trajectory correction method according to claim 5, characterized in that: Reducing the curvature of the trajectory of the azimuth gamma probe includes: Determine the positions of a plurality of strong signal areas whose positional relationship is sequentially adjacent, and the distance between any two strong signal areas is greater than or equal to the required distance; using corresponding areas of the plurality of strong signal areas as adjustment track areas; Constructing multiple virtual track lines in the adjustment track area, each virtual track line has a different curvature radius, and the curvature radius of the virtual track line tends to increase in the order sequence; The azimuth gamma probe is driven to sequentially pass through each virtual track line, and when the data points generated by the virtual track line cannot obtain a collection area, the subsequent virtual track lines in the sequential sequence are stopped.

8. An azimuth gamma probe, characterized in that: The azimuth gamma probe comprises: one or more memories for storing instructions; and One or more processors, configured to call and execute the instructions from the memory to perform the method according to any one of claims 1 to 7.

9. A well logging instrument, characterized in that: Comprising the azimuth gamma probe as claimed in claim 8.

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