A reservoir permeability determination method and device, electronic equipment and storage medium

Abstract

The application discloses a reservoir permeability determination method and device, electronic equipment and a storage medium. The method comprises the following steps: after well washing of a target well is qualified, a water pump is controlled to perform a multi-round water pumping test with different pressure differences on the target well; target test parameters of the target well in each round of water pumping test are collected, and attribute parameters of a water sample in the target well are obtained by analyzing and testing the water sample in the target well; wherein, the target test parameters comprise water level drawdown and total water inflow per unit time; a reservoir permeability coefficient of the target well is calculated based on the target test parameters of the target well in each round of water pumping test; and the reservoir permeability is calculated by using the reservoir permeability coefficient of the target well and the attribute parameters of the water sample in the target well.

Description

Technical Field

[0001] This application relates to the field of resource assessment technology, and in particular to a method and apparatus for determining reservoir permeability, electronic equipment, and storage medium. Background Technology

[0002] Geothermal resources are a clean and renewable energy source with large reserves, high efficiency, and good stability. They can be used for power generation, heating, hot spring baths, agricultural irrigation, and many other fields. Therefore, the development of geothermal resources is constantly being intensified. However, before developing geothermal resources, it is usually necessary to assess their development potential.

[0003] Currently, reservoir permeability is considered a crucial parameter in assessing the development potential of geothermal resources. The primary method for obtaining geothermal reservoir permeability parameters is to collect rock samples from the area to be developed, analyze and test these samples, and thus determine the reservoir permeability of that region.

[0004] However, collecting rock samples from downhole is relatively difficult, requiring a large amount of manpower and resources. Furthermore, the analytical and testing parameters of the collected rock samples can only accurately reflect the reservoir conditions in a small local area, and therefore cannot accurately reflect the macroscopic performance of the reservoir in the area to be developed, resulting in a relatively low accuracy in assessing the development potential. Summary of the Invention

[0005] In view of the shortcomings of the prior art, this application provides a method and apparatus, electronic device and storage medium for determining reservoir permeability, so as to solve the problem that the reservoir permeability obtained by the prior art cannot accurately reflect the macroscopic performance of the reservoir in the area to be developed, thus making the accuracy of the assessment of development potential relatively low.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] This application provides a method for determining reservoir permeability, including:

[0008] After the target well is cleaned and deemed qualified, the water pump is controlled to conduct multiple rounds of pumping tests with different pressure differentials on the target well.

[0009] The target test parameters of the target well are collected during each round of pumping tests, and the attribute parameters of the water sample in the target well are obtained by analyzing and testing the water sample in the target well; wherein, the target test parameters include drawdown and total inflow per unit time;

[0010] Based on the target test parameters of the target well during each round of pumping tests, the reservoir permeability coefficient of the target well is calculated.

[0011] The reservoir permeability is calculated using the reservoir permeability coefficient of the target well and the property parameters of the water sample in the target well.

[0012] Optionally, in the above method for determining reservoir permeability, before controlling the water pump to conduct multiple rounds of pumping tests with different pressure differentials on the target well after the target well has passed the well washing test, the method further includes:

[0013] The control flushing device performs rotary jet flushing of the target well from top to bottom in stages according to a set rate;

[0014] After each flushing of the target well, the height of the sand at the bottom of the target well and the content of suspended solids in the water sample are detected.

[0015] When it is detected that there is no sand at the bottom of the target well and the suspended solids content of the water sample is less than the preset content, a water pumping test is carried out on the target well, and the water temperature and water drawdown in the target well are collected in real time.

[0016] Determine whether the water temperature and water drawdown in the target well are stable;

[0017] If it is determined that the water temperature and water volume drawdown in the target well are stable, then the well washing of the target well is deemed qualified.

[0018] Optionally, in the above method for determining reservoir permeability, calculating the reservoir permeability coefficient of the target well based on the target test parameters of the target well during each round of pumping tests includes:

[0019] Based on the diameter of the target well and the reservoir thickness of the target well, the total water-producing area of ​​the reservoir is calculated.

[0020] The difference in water level drawdown and the difference in total inflow per unit time of the target well during two adjacent pumping tests are calculated to obtain multiple sets of parameter differences.

[0021] Based on the total water-producing area of ​​the reservoir, the parameter differences for each group, and the pressure drop distance, Darcy's law is used to calculate the reservoir permeability coefficient corresponding to each parameter difference; wherein, the pressure drop distance is the radius of the target well.

[0022] The mean value of the reservoir permeability coefficient corresponding to the parameter differences in each group is determined as the reservoir permeability coefficient of the target well.

[0023] Optionally, in the above method for determining reservoir permeability, the step of calculating the reservoir permeability using the reservoir permeability coefficient of the target well and the property parameters of the water sample in the target well includes:

[0024] The reservoir permeability is obtained by multiplying the reservoir permeability coefficient of the target well, the fluid code of the water sample in the target well, and the gravitational acceleration, and then dividing the product by the fluid viscosity of the water sample in the target well.

[0025] Optionally, the above method for determining reservoir permeability further includes:

[0026] The unit inflow rate and inflow stabilization time of the target well were collected during each round of pumping tests.

[0027] Plot a curve showing the relationship between the inflow rate parameter and the drawdown, and plot a curve showing the relationship between the inflow rate parameter and the inflow rate stabilization time; wherein, the inflow rate parameter includes the unit inflow rate and the total inflow rate per unit time.

[0028] A second aspect of this application provides an apparatus for determining reservoir permeability, comprising:

[0029] The pumping test unit is used to control the water pump to conduct multiple rounds of pumping tests with different pressure differentials on the target well after the well washing test is qualified.

[0030] The first acquisition unit is used to acquire the target test parameters of the target well during each round of pumping tests, and to obtain the attribute parameters of the water sample in the target well by analyzing and testing the water sample in the target well; wherein, the target test parameters include the drawdown and the total inflow per unit time.

[0031] The coefficient calculation unit is used to calculate the reservoir permeability coefficient of the target well based on the target test parameters of the target well during each round of pumping tests.

[0032] The permeability calculation unit is used to calculate the reservoir permeability using the reservoir permeability coefficient of the target well and the property parameters of the water sample in the target well.

[0033] Optionally, the above-mentioned apparatus for determining reservoir permeability further includes:

[0034] The control unit is used to control the flushing device to perform rotary jet flushing of the target well from top to bottom in stages at a set rate.

[0035] The detection unit is used to detect the bottom sand height and the suspended solids content of the water sample after each flushing of the target well.

[0036] The test unit is used to conduct a water pumping test on the target well when it is detected that there is no sand at the bottom of the target well and the suspended solids content of the water sample is less than the preset content, and to collect the water temperature and water drawdown in the target well in real time.

[0037] The judgment unit is used to determine whether the water temperature and water drawdown in the target well are stable.

[0038] The determining unit is used to determine that the well washing of the target well is qualified when it is determined that the water temperature and water volume drawdown in the target well are stable.

[0039] Optionally, in the above-described apparatus for determining reservoir permeability, the coefficient calculation unit includes:

[0040] An area calculation unit is used to calculate the total water-producing area of ​​the reservoir based on the diameter of the target well and the reservoir thickness of the target well.

[0041] The difference calculation unit is used to calculate the difference in water level drawdown and the difference in total inflow per unit time of the target well during two adjacent pumping tests, respectively, to obtain multiple sets of parameter differences;

[0042] The coefficient calculation subunit calculates the reservoir permeability coefficient corresponding to each set of parameter differences based on the total water-producing area of ​​the reservoir, the parameter differences for each set, and the pressure drop distance, using Darcy's law; wherein, the pressure drop distance is the radius of the target well.

[0043] The mean value calculation unit is used to determine the mean value of the reservoir permeability coefficient corresponding to the parameter differences of each group as the reservoir permeability coefficient of the target well.

[0044] Optionally, in the above-described apparatus for determining reservoir permeability, the permeability calculation unit includes:

[0045] The permeability calculation subunit is used to multiply the reservoir permeability coefficient of the target well, the fluid code of the water sample in the target well, and the gravitational acceleration, and then divide the resulting product by the fluid viscosity of the water sample in the target well to obtain the reservoir permeability.

[0046] Optionally, the above-mentioned apparatus for determining reservoir permeability further includes:

[0047] The second acquisition unit is used to acquire the unit water inflow and the water inflow stabilization time of the target well during each round of pumping tests.

[0048] The plotting unit is used to plot the relationship curve between the inflow rate parameter and the drawdown, and to plot the relationship curve between the inflow rate parameter and the inflow rate stabilization time; wherein, the inflow rate parameter includes the unit inflow rate and the total inflow rate per unit time.

[0049] A third aspect of this application provides an electronic device, comprising:

[0050] Memory and processor;

[0051] The memory is used to store programs;

[0052] The processor is used to execute the program, which, when executed, is specifically used to implement the method for determining reservoir permeability as described in any of the above.

[0053] A fourth aspect of this application provides a computer storage medium for storing a computer program, which, when executed, implements the method for determining reservoir permeability as described in any of the preceding claims.

[0054] This application provides a method for determining reservoir permeability. After the target well is cleaned and deemed qualified, multiple pumping tests with different pressure differentials are conducted on the target well. Target test parameters of the target well are collected during each round of pumping tests, and the property parameters of the water samples in the target well are obtained through analysis and testing. The target test parameters include drawdown and total inflow per unit time. Since the target test parameters reflect the permeability of the water body, the reservoir permeability coefficient of the target well can be calculated based on the target test parameters of the target well during each round of pumping tests. Finally, the reservoir permeability is calculated using the reservoir permeability coefficient of the target well and the property parameters of the water samples in the target well. This method achieves the determination of reservoir permeability through pumping tests and the analysis of relevant hydrogeological parameters. Pumping tests and the collection of relevant test parameters are more convenient than collecting rock samples. Furthermore, the target test parameters reflect the water permeability of a large area, so the obtained reservoir permeability can more accurately reflect the macroscopic performance of the reservoir in the area to be developed, thereby effectively ensuring the accuracy of the assessment of development potential. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0056] Figure 1 A flowchart illustrating a method for determining reservoir permeability provided in an embodiment of this application;

[0057] Figure 2 A flowchart of a well-washing method provided in this application embodiment;

[0058] Figure 3 A schematic diagram of the relationship between water inflow parameters and drawdown provided in an embodiment of this application;

[0059] Figure 4 A schematic diagram of the relationship between the inflow rate parameter and the inflow rate stabilization time provided in an embodiment of this application;

[0060] Figure 5 A flowchart illustrating a method for calculating reservoir permeability coefficients provided in this application embodiment;

[0061] Figure 6 A schematic diagram of the architecture of a reservoir permeability determination device provided in an embodiment of this application;

[0062] Figure 7 This is a schematic diagram of the architecture of an electronic device provided in an embodiment of this application. Detailed Implementation

[0063] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0064] In this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] This application provides a method for determining reservoir permeability, such as... Figure 1 As shown, it includes the following steps:

[0066] S101. After the target well has passed the well washing test, control the water pump to conduct multiple rounds of pumping tests with different pressure differentials on the target well.

[0067] Among them, target drilling refers to wells drilled in order to analyze the reservoir permeability of the area to be explored.

[0068] It should be noted that in this embodiment, the reservoir permeability is determined by conducting pumping tests on the well. Specifically, the reservoir permeability is determined by analyzing the water inflow in the well through pumping tests, i.e., analyzing the seepage situation to determine the reservoir permeability. Conducting pumping tests and obtaining the corresponding hydrogeological data is more convenient than collecting rock samples, thus saving a significant amount of manpower and resources. Furthermore, water can flow into the well from all directions, so the reservoir permeability determined by pumping tests can better reflect the macroscopic properties of the reservoir in the area to be developed.

[0069] Specifically, by setting parameters, the water pump can be controlled to conduct multiple rounds of pumping tests at different pressure differentials on the target well. At least two rounds of pumping tests at different pressure differentials are required. Typically, three pumping tests at different pressure differentials are conducted to analyze the reservoir permeability based on the changes in the water body during the pumping tests at different pressure differentials.

[0070] Optionally, a high-temperature electric submersible pump can be used for the pumping test. Typically, a pump with a power of at least 50kW and a head of at least 150m is selected to meet the requirements of the pumping test. Generally, the best results are obtained when the maximum depth of the pumping test is 100 to 200 meters. Of course, depending on the specific circumstances, appropriate pumps and pumping depths can be used.

[0071] Optionally, during the pumping test, the pumping flow rate can be controlled by a frequency converter, the water volume can be observed by an electromagnetic flowmeter, the water temperature and air temperature at the wellhead can be observed by a mercury thermometer, and the water level depth can be measured by a measuring rope and an ammeter.

[0072] Since sand and gravel in the well water can affect the analysis results, it is necessary to flush the well after drilling is completed, and pumping tests can be started after the well flushing is qualified.

[0073] Optionally, another embodiment of this application provides a well-washing method, such as... Figure 2 As shown, it includes the following steps:

[0074] S201. The control flushing device performs rotary jet flushing of the target well from top to bottom in stages according to the set rate.

[0075] Specifically, during well washing, workers first run the flushing tubing, and after running the tubing, they run the drill pipe and flushing tool, thus forming the flushing device. Then, the flushing rate is set, and the flushing device is automatically controlled by a program to perform rotary jet flushing of the target well section by section from top to bottom at the set rate. The flushing rate is typically set to 5-10 min / m.

[0076] Alternatively, an electric submersible pump can be used for flushing, and the cumulative flushing time is usually 24 hours, which can effectively ensure flushing and various aspects.

[0077] S202. After each flushing of the target well, detect the height of the sand at the bottom of the target well and the content of suspended solids in the water sample.

[0078] S203. When it is detected that there is no sand at the bottom of the target well and the suspended solids content of the water sample is less than the preset content, a water pumping test is carried out on the target well, and the water temperature and water drawdown in the target well are collected in real time.

[0079] It should be noted that flushing to the point where there is no sand at the bottom of the target well (i.e., when the water is flushed until the sand is clear and the sand height at the bottom of the well is zero) and the suspended solids content in the water sample is less than a preset level (e.g., less than 0.1%), can be considered to meet the requirements. However, to further ensure that the water quality at this point will not affect the analysis results, in this embodiment of the application, a test pumping test will be conducted first, and the water temperature and drawdown in the target well will be collected in real time.

[0080] Specifically, the water pumping test can be achieved by controlling the pumping equipment.

[0081] S204. Determine whether the water temperature and drawdown in the target well are stable.

[0082] If it is determined that the water temperature and water volume drawdown in the target well are stable, it proves that the well washing effect is qualified and meets the requirements for formal pumping. Therefore, step S205 is executed at this time.

[0083] If the water temperature or water volume drawdown in the target well is unstable, it indicates that the test pumping results are unqualified. In this case, it is necessary to find out the cause and carry out further formal pumping operations only after the problem is solved, the pumping test is repeated, and the pumping effect is qualified.

[0084] S205. Determine that the well washing of the target well is qualified.

[0085] S102. Collect the target test parameters of the target well during each round of pumping tests, and obtain the attribute parameters of the water sample in the target well by analyzing and testing the water sample in the target well.

[0086] The target test parameters include drawdown and total inflow per unit time.

[0087] Optionally, other fixed parameters required in subsequent calculations, such as the number of adoptions for drilling depth and reservoir thickness, can also be obtained at this time.

[0088] Specifically, since the required water sample properties are some conventional properties of water samples, such as viscosity and density, corresponding detection equipment is pre-set so that the water sample collected from the target well can be directly detected by controlling the detection equipment, thereby obtaining the property parameters of the water sample in the target well.

[0089] Optionally, in order to more intuitively translate the hydrogeological conditions of the target well, another embodiment of this application further includes:

[0090] Collect the unit water inflow and water inflow stabilization time of the target well during each round of pumping tests, and plot the relationship curves between water inflow parameters and drawdown, as well as the relationship curves between water inflow parameters and water inflow stabilization time.

[0091] The inflow parameters include unit inflow and total inflow per unit time. Total inflow per unit time is the total inflow within a unit time, while unit inflow per unit time is the inflow per unit reservoir within a unit time.

[0092] Specifically, to plot the relationship between inflow parameters and drawdown, the unit inflow and total inflow per unit time are used as the vertical axis, and the drawdown is used as the horizontal axis. For example, ... Figure 3 As shown, the left vertical axis represents the total inflow Q per unit time, the right vertical axis represents the unit inflow q, and the horizontal axis represents the drawdown S.

[0093] Similarly, the relationship curve between the inflow rate parameter and the inflow rate stabilization time is plotted with the unit inflow rate and the total inflow rate per unit time on the ordinate, and the inflow rate stabilization time on the abscissa. For example, Figure 4 As shown, the left vertical axis represents the total inflow Q per unit time, the right vertical axis represents the unit inflow q, and the horizontal axis represents the inflow stabilization time t.

[0094] The stabilization time of the inflow is the time during which the inflow stabilizes, and it is usually set to 48 hours, 24 hours, or 12 hours.

[0095] S103. Based on the target test parameters of the target well during each round of pumping tests, the reservoir permeability coefficient of the target well is calculated.

[0096] It should be noted that the target test parameters include the drawdown and total inflow per unit time during the pumping test. Therefore, the target test parameters can reflect the permeability of the reservoir to water, and the reservoir permeability coefficient of the target well can be calculated based on the target test parameters.

[0097] Specifically, the reservoir permeability coefficient of the target well can be calculated based on Darcy's law.

[0098] Optionally, in another embodiment of this application, one specific implementation of step S103 is as follows: Figure 5 As shown, it includes the following steps:

[0099] S501. Based on the diameter of the target well and the reservoir thickness of the target well, the total water-producing area of ​​the reservoir is calculated.

[0100] Since what is obtained is the total water inflow per unit time, not the water inflow per unit area per unit time, it is necessary to first calculate the total water-producing area of ​​the reservoir based on the diameter of the target well and the thickness of the reservoir.

[0101] Specifically, the total water-producing area of ​​the reservoir can be obtained by multiplying the diameter of the target well by the reservoir thickness and then by pi.

[0102] S502. Calculate the difference in drawdown of the target well and the difference in total inflow per unit time during two adjacent pumping tests to obtain multiple sets of parameter differences.

[0103] Specifically, Darcy's Law is as follows: Right now: therefore:

[0104]

[0105] Where K is the reservoir permeability coefficient; h1 and h2 are the liquid levels of the two pumping operations, so Δh is the difference in liquid level between the two pumping operations; ΔQ is the difference in the unit total inflow of water between the two pumping operations; A is the total outflow area of ​​the reservoir; and L is the pressure drop distance.

[0106] Therefore, to obtain the reservoir permeability coefficient, it is necessary to calculate the difference in liquid level between the two pumping operations and the difference in the unit total inflow rate between the two pumping operations.

[0107] S503. Based on the total water-producing area of ​​the reservoir, the difference between each set of parameters, and the pressure drop distance, Darcy's law is used to calculate the reservoir permeability coefficient corresponding to each set of parameter differences.

[0108] The pressure drop distance is the radius of the target well.

[0109] Specifically, by substituting the total water-producing area of ​​the reservoir, a set of parameter differences, and the pressure drop distance into the above formula for calculating the reservoir permeability coefficient, we can obtain the reservoir permeability coefficient corresponding to the set of parameter differences.

[0110] S504. The mean value of the reservoir permeability coefficient corresponding to the parameter differences of each group is determined as the reservoir permeability coefficient of the target well.

[0111] In order to improve the accuracy of the reservoir permeability coefficient of the target well, multiple reservoir permeability coefficients were calculated in this embodiment of the application, and the average value of each reservoir permeability coefficient was used as the reservoir permeability coefficient of the target well.

[0112] S104. Calculate the reservoir permeability using the reservoir permeability coefficient of the target well and the property parameters of the water sample in the target well.

[0113] Since liquids with different properties have different permeability, in order to obtain the reservoir permeability coefficient of the target well, it is necessary to further consider the property parameters of the water sample in the target well and finally calculate the energy storage permeability.

[0114] Specifically, in another embodiment of this application, one specific implementation of step S104 includes:

[0115] The reservoir permeability is obtained by multiplying the reservoir permeability coefficient of the target well, the fluid code of the water sample in the target well, and the gravitational acceleration, and then dividing the product by the fluid viscosity of the water sample in the target well.

[0116] This application provides a method for determining reservoir permeability. After the target well is cleaned and deemed qualified, multiple pumping tests with different pressure differentials are conducted on the target well. Target test parameters of the target well are collected during each round of pumping tests, and the property parameters of the water samples in the target well are obtained through analysis and testing. The target test parameters include drawdown and total inflow per unit time. Since the target test parameters reflect the permeability of the water body, the reservoir permeability coefficient of the target well can be calculated based on the target test parameters of the target well during each round of pumping tests. Finally, the reservoir permeability is calculated using the reservoir permeability coefficient of the target well and the property parameters of the water samples in the target well. This method achieves the determination of reservoir permeability through pumping tests and the analysis of relevant hydrogeological parameters. Pumping tests and the collection of relevant test parameters are more convenient than collecting rock samples. Furthermore, the target test parameters reflect the water permeability of a large area, so the obtained reservoir permeability can more accurately reflect the macroscopic performance of the reservoir in the area to be developed, thereby effectively ensuring the accuracy of the assessment of development potential.

[0117] Another embodiment of this application provides a device for determining reservoir permeability, such as... Figure 6 As shown, it includes:

[0118] The pumping test unit 601 is used to control the water pump to conduct multiple rounds of pumping tests with different pressure differentials on the target well after the target well has passed the well washing test.

[0119] The first acquisition unit 602 is used to acquire the target test parameters of the target well during each round of pumping tests, and to obtain the attribute parameters of the water sample in the target well by analyzing and testing the water sample in the target well.

[0120] The target test parameters include drawdown and total inflow per unit time.

[0121] The coefficient calculation unit 603 is used to calculate the reservoir permeability coefficient of the target well based on the target test parameters of the target well during each round of pumping tests.

[0122] The permeability calculation unit 604 is used to calculate the reservoir permeability using the reservoir permeability coefficient of the target well and the property parameters of the water sample in the target well.

[0123] Optionally, in another embodiment of the reservoir permeability determination apparatus provided in this application, the apparatus further includes:

[0124] The control unit is used to control the flushing device to perform rotary jet flushing of the target well from top to bottom in stages according to a set rate.

[0125] The detection unit is used to detect the height of sand at the bottom of the target well and the content of suspended solids in the water sample after each flushing of the target well.

[0126] The test unit is used to conduct a water pumping test on the target well when it is detected that there is no sand at the bottom of the target well and the suspended solids content of the water sample is less than the preset content, and to collect the water temperature and water drawdown in the target well in real time.

[0127] The judgment unit is used to determine whether the water temperature and drawdown in the target well are stable.

[0128] The determination unit is used to determine whether the well washing of the target well is qualified when the water temperature and water volume drawdown in the target well are stable.

[0129] Optionally, in another embodiment of the reservoir permeability determination apparatus provided in this application, the coefficient calculation unit includes:

[0130] The area calculation unit is used to calculate the total water-producing area of ​​the reservoir based on the diameter of the target well and the thickness of the reservoir base.

[0131] The difference calculation unit is used to calculate the difference in drawdown of the target well and the difference in total inflow per unit time during two adjacent pumping tests, respectively, to obtain multiple sets of parameter differences.

[0132] The coefficient calculation subunit calculates the reservoir permeability coefficient corresponding to each set of parameter differences based on the total water-producing area of ​​the reservoir, the difference between each set of parameters, and the pressure drop distance, using Darcy's law. The pressure drop distance is the radius of the target well.

[0133] The mean value calculation unit is used to determine the mean value of the reservoir permeability coefficient corresponding to the difference of each group of parameters as the reservoir permeability coefficient of the target well.

[0134] Optionally, in another embodiment of the reservoir permeability determination apparatus provided in this application, the permeability calculation unit includes:

[0135] The permeability calculation subunit is used to multiply the reservoir permeability coefficient of the target well, the fluid code of the water sample in the target well, and the gravitational acceleration, and then divide the product by the fluid viscosity of the water sample in the target well to obtain the reservoir permeability.

[0136] Optionally, in another embodiment of the reservoir permeability determination apparatus provided in this application, the apparatus further includes:

[0137] The second acquisition unit is used to acquire the unit water inflow and the water inflow stabilization time of the target well during each round of pumping tests.

[0138] The plotting unit is used to plot the relationship between the inflow parameters and the drawdown, as well as the relationship between the inflow parameters and the inflow stabilization time.

[0139] The parameters for water inflow include the unit water inflow and the total water inflow per unit time.

[0140] It should be noted that the specific working process of each unit provided in the above embodiments of this application can be referred to the corresponding steps in the above method embodiments, and will not be repeated here.

[0141] Another embodiment of this application provides an electronic device, such as... Figure 7 As shown, it includes:

[0142] Memory 701 and processor 702.

[0143] The memory 701 is used to store the program.

[0144] The processor 702 is used to execute a program stored in the memory 701, which, when executed, is specifically used to implement the method for determining reservoir permeability as provided in any of the above embodiments.

[0145] Another embodiment of this application provides a computer storage medium for storing a computer program, which, when executed, implements the method for determining reservoir permeability as provided in any of the above embodiments.

[0146] Computer storage media, including both permanent and non-permanent, removable and non-removable media, can store information using any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0147] Those skilled in the art will further recognize that the units and algorithmic steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0148] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for determining reservoir permeability, characterized in that, include: After the target well is cleaned and deemed qualified, the water pump is controlled to conduct multiple rounds of pumping tests with different pressure differentials on the target well. The target test parameters of the target well are collected during each round of pumping tests, and the attribute parameters of the water sample in the target well are obtained by analyzing and testing the water sample in the target well; wherein, the target test parameters include drawdown and total inflow per unit time; Based on the target test parameters of the target well during each round of pumping tests, the reservoir permeability coefficient of the target well is calculated, including: calculating the total water-producing area of ​​the reservoir based on the diameter and reservoir thickness of the target well; calculating the difference in drawdown and the difference in total inflow per unit time of the target well during two adjacent rounds of pumping tests to obtain multiple sets of parameter differences; calculating the reservoir permeability coefficient corresponding to each set of parameter differences based on the total water-producing area of ​​the reservoir, each set of parameter differences, and the pressure drop distance using Darcy's law; wherein the pressure drop distance is the radius of the target well; and determining the mean of the reservoir permeability coefficients corresponding to each set of parameter differences as the reservoir permeability coefficient of the target well. The reservoir permeability is calculated using the reservoir permeability coefficient of the target well and the property parameters of the water sample in the target well. This includes multiplying the reservoir permeability coefficient of the target well, the fluid density of the water sample in the target well, and the gravitational acceleration, and then dividing the product by the fluid viscosity of the water sample in the target well to obtain the reservoir permeability. The unit inflow rate and inflow stabilization time of the target well were collected during each round of pumping tests. Plot a curve showing the relationship between the inflow rate parameter and the drawdown, and plot a curve showing the relationship between the inflow rate parameter and the inflow rate stabilization time; wherein, the inflow rate parameter includes the unit inflow rate and the total inflow rate per unit time.

2. The method according to claim 1, characterized in that, Before conducting multiple rounds of pumping tests with different pressure differentials on the target well after it has passed well washing, the process also includes: The control flushing device performs rotary jet flushing of the target well from top to bottom in stages according to a set rate; After each flushing of the target well, the height of the sand at the bottom of the target well and the content of suspended solids in the water sample are detected. When it is detected that there is no sand at the bottom of the target well and the suspended solids content of the water sample is less than the preset content, a water pumping test is carried out on the target well, and the water temperature and water drawdown in the target well are collected in real time. Determine whether the water temperature and water drawdown in the target well are stable; If it is determined that the water temperature and water volume drawdown in the target well are stable, then the well washing of the target well is deemed qualified.

3. A device for determining reservoir permeability, characterized in that, include: The pumping test unit is used to control the water pump to conduct multiple rounds of pumping tests with different pressure differentials on the target well after the well washing test is qualified. The first acquisition unit is used to acquire the target test parameters of the target well during each round of pumping tests, and to obtain the attribute parameters of the water sample in the target well by analyzing and testing the water sample in the target well; wherein, the target test parameters include the drawdown and the total inflow per unit time. The coefficient calculation unit is used to calculate the reservoir permeability coefficient of the target well based on the target test parameters of the target well during each round of pumping tests. The coefficient calculation unit includes: an area calculation unit, a difference calculation unit, a coefficient calculation subunit, and a mean calculation unit; The area calculation unit is used to calculate the total water-producing area of ​​the reservoir based on the diameter of the target well and the reservoir thickness of the target well. The difference calculation unit is used to calculate the difference in water level drawdown and the difference in total water inflow per unit time of the target well during two adjacent pumping tests, respectively, to obtain multiple sets of parameter differences. The coefficient calculation subunit calculates the reservoir permeability coefficient corresponding to each set of parameter differences based on the total water-producing area of ​​the reservoir, the parameter differences of each set, and the pressure drop distance, using Darcy's law; wherein, the pressure drop distance is the radius of the target well. The mean calculation unit is used to determine the mean value of the reservoir permeability coefficient corresponding to the parameter differences of each group as the reservoir permeability coefficient of the target well. The permeability calculation unit is used to calculate the reservoir permeability using the reservoir permeability coefficient of the target well and the property parameters of the water sample in the target well. The permeability calculation unit includes: a permeability calculation subunit; The permeability calculation subunit is used to multiply the reservoir permeability coefficient of the target well, the fluid density of the water sample in the target well, and the gravitational acceleration, and then divide the product by the fluid viscosity of the water sample in the target well to obtain the reservoir permeability. The second acquisition unit is used to acquire the unit water inflow and the water inflow stabilization time of the target well during each round of pumping tests. The plotting unit is used to plot the relationship curve between the inflow rate parameter and the drawdown, and to plot the relationship curve between the inflow rate parameter and the inflow rate stabilization time; wherein, the inflow rate parameter includes the unit inflow rate and the total inflow rate per unit time.

4. The apparatus according to claim 3, characterized in that, Also includes: The control unit is used to control the flushing device to perform rotary jet flushing of the target well from top to bottom in stages at a set rate. The detection unit is used to detect the bottom sand height and the suspended solids content of the water sample after each flushing of the target well. The test unit is used to conduct a water pumping test on the target well when it is detected that there is no sand at the bottom of the target well and the suspended solids content of the water sample is less than the preset content, and to collect the water temperature and water drawdown in the target well in real time. The judgment unit is used to determine whether the water temperature and water drawdown in the target well are stable. The determining unit is used to determine that the well washing of the target well is qualified when it is determined that the water temperature and water volume drawdown in the target well are stable.

5. An electronic device, characterized in that, include: Memory and processor; The memory is used to store programs; The processor is used to execute the program, which, when executed, is specifically used to implement the method for determining reservoir permeability as described in any one of claims 1 to 2.

6. A computer storage medium, characterized in that, Used to store a computer program, which, when executed, is used to implement the method for determining reservoir permeability as described in any one of claims 1 to 2.

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