WO2021184685A1

WO2021184685A1 - Method for acquiring wettability evaluation parameter and terminal device

Info

Publication number: WO2021184685A1
Application number: PCT/CN2020/111478
Authority: WO
Inventors: 张金川; 李沛; 唐玄; 刘飏; 陈世敬; 魏晓亮; 苔丝
Original assignee: 中国地质大学（北京）
Priority date: 2020-03-16
Filing date: 2020-08-26
Publication date: 2021-09-23
Also published as: CN111553047B; CN111553047A

Abstract

A method and apparatus for acquiring a wettability evaluation parameter, a terminal device and a computer-readable storage medium. The method for acquiring a wettability evaluation parameter comprises: acquiring spontaneous imbibition experimental data obtained by carrying out a spontaneous imbibition experiment on a target sample; and according to the spontaneous imbibition experimental data, using a Debye model to determine a wettability evaluation parameter of the target sample. The apparatus for acquiring a wettability evaluation parameter comprises: a data acquisition module used for acquiring the spontaneous imbibition experimental data obtained by carrying out the spontaneous imbibition experiment on the target sample; and a parameter determining module used for according to the spontaneous imbibition experimental data, using the Debye model to determine a wettability evaluation parameter of the target sample. The present invention uses the spontaneous imbibition experiment and the Debye model to determine a wettability evaluation parameter of a target sample, thus having a simple calculation process, good applicability and high accuracy, obtaining a wettability evaluation parameter that can effectively reflect the physical mechanism of the target sample, and being capable of accurately and conveniently evaluating the wettability of rocks and improving the development effect of oil and gas reservoirs.

Description

Method for obtaining wettability evaluation parameters and terminal equipment

The patent application for this invention claims the priority of the Chinese patent application No. CN202010182695.5 filed on March 16, 2020. The disclosure of the earlier application is incorporated into this application by reference in its entirety.

Technical field

This application belongs to the field of oil and gas exploration technology, and in particular relates to a method for obtaining wettability evaluation parameters and terminal equipment.

Background technique

Wettability refers to the tendency of a solid to easily contact a certain fluid but not other fluids, and it reflects the balance between surface force and interfacial tension.

The wettability is the result of the interaction between rock minerals and reservoir fluids. It is one of the basic physical properties of the reservoir. It determines the distribution of fluids in the reservoir. It not only controls the distribution of gas and water in the pores, but also further affects the adsorption and desorption of methane gas. The method has an important impact on shale gas accumulation and ultimate recovery.

The prior art methods for evaluating rock wettability all have their limitations. The lack of a simple and effective method for extracting wettability evaluation parameters results in unsatisfactory evaluation effects on rock wettability, thereby affecting the performance of oil and gas reservoirs. Development effect.

technical problem

The embodiments of the present application provide a method and terminal device for obtaining wettability evaluation parameters, so as to solve the lack of a simple and effective method for obtaining wettability evaluation parameters in the prior art, resulting in an unsatisfactory evaluation effect on rock wettability , And then affect the effect of oil and gas reservoir development.

Technical solutions

The first aspect of the embodiments of the present application provides a method for obtaining wettability evaluation parameters, including:

Obtain the spontaneous imbibition experiment data obtained from the spontaneous imbibition experiment on the target sample;

According to the experimental data of spontaneous imbibition, the Debye model is used to determine the wettability evaluation parameters of the target sample.

Optionally, according to the spontaneous imbibition experiment data, the Debye model is used to determine the wettability evaluation parameters of the target sample, including:

Establish Debye model;

The Debye model is used to fit the experimental data of spontaneous imbibition to determine the wettability evaluation parameters of the target sample.

Optionally, the experimental data of spontaneous imbibition includes self-priming time and self-priming volume. The Debye model is:

in,

Is the self-priming time,

Is the self-priming volume,

Is the self-priming saturation value;

Is the weighting coefficient of the capillary force,

Is the weight coefficient of gravity;

Is the time threshold of capillary force,

Is the time threshold of gravity,

Is the relaxation time.

Optionally, the wettability evaluation parameters include: one or more of the self-priming saturation value, the weight coefficient of capillary force, the weight coefficient of gravity, the time threshold of capillary force, and the time threshold of gravity.

Optionally, the target sample is a regular columnar or cubic block shale sample.

The second aspect of the embodiments of the present application provides a wettability evaluation parameter acquisition device, including:

The data acquisition module is used to acquire the spontaneous imbibition experiment data obtained by the spontaneous imbibition experiment on the target sample;

The parameter determination module is used to determine the wettability evaluation parameters of the target sample using the Debye model based on the spontaneous imbibition experimental data.

Optionally, the parameter determination module includes:

The model building unit is used to build the Debye model;

The parameter determination unit is used to fit the spontaneous imbibition experimental data using the Debye model and determine the wettability evaluation parameters of the target sample.

in,

Is the self-priming time,

Is the self-priming volume,

Is the self-priming saturation value;

Is the weighting coefficient of the capillary force,

Is the weight coefficient of gravity;

Is the time threshold of capillary force,

Is the time threshold of gravity,

Is the relaxation time.

The third aspect of the embodiments of the present application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. The steps of the method for obtaining wettability evaluation parameters provided by the aspect.

The fourth aspect of the embodiments of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the wettability evaluation as provided in the first aspect of the embodiments of the present application is realized Steps of the parameter acquisition method.

Beneficial effect

The embodiment of the application provides a method for obtaining wettability evaluation parameters, including: obtaining spontaneous imbibition experimental data obtained by performing a spontaneous imbibition experiment on a target sample; and using the Debye model to determine the target sample’s performance based on the spontaneous imbibition experiment data. Parameters for wettability evaluation. The embodiment of the application adopts the spontaneous imbibition experiment and the Debye model to determine the wettability evaluation parameters of the target sample. The calculation process is simple, the applicability is strong, and the accuracy is high. It provides a simple and effective method for acquiring the wettability evaluation parameters. The wettability evaluation parameters calculated by the above method can effectively reflect the physical mechanism of the spontaneous imbibition of the target sample, can accurately and conveniently evaluate the wettability of the rock, and improve the development effect of oil and gas reservoirs.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only of the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative labor.

FIG. 1 is a schematic diagram of an implementation process of a method for obtaining wettability evaluation parameters provided by an embodiment of the present application;

2 is a schematic diagram of the relationship between the self-absorption saturation value and the contact angle provided by the embodiment of the present application;

3 is a schematic diagram of the relationship between relaxation time and contact angle provided by an embodiment of the present application;

4 is a schematic diagram of the relationship between the weight of the bedding force and the contact angle provided by an embodiment of the present application;

5 is a schematic diagram of the relationship between the weight of the stratification force and the contact angle provided by an embodiment of the present application;

6 is a schematic diagram of the relationship between the layer-by-layer self-absorption time threshold and the contact angle provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of the relationship between the self-absorption time threshold of the stratification layer and the contact angle provided by an embodiment of the present application; FIG.

FIG. 8 is a schematic diagram of the comparison between the layer-by-layer self-absorption amount and the self-absorption time of 7 target samples provided in the embodiments of the present application;

FIG. 9 is a schematic diagram of the comparison between the self-absorption amount and the self-absorption time of 7 target samples provided by the embodiments of the present application;

Fig. 10 is a schematic diagram of a wettability evaluation parameter acquisition device provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of a terminal device provided by an embodiment of the present application.

Embodiments of the present invention

In the following description, for the purpose of illustration rather than limitation, specific details such as a specific system structure and technology are proposed for a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from obstructing the description of this application.

In order to illustrate the technical solution of the present application, specific embodiments are used for description below.

Referring to FIG. 1, an embodiment of the present application provides a method for obtaining wettability evaluation parameters, including:

Step S101: Obtain spontaneous imbibition experiment data obtained by performing a spontaneous imbibition experiment on a target sample.

Wettability is one of the important parameters for understanding the characteristics of oil and gas reservoirs. It is of great significance to effectively determine the degree of rock wettability to guess the oil reservoir, the oil-water ratio after water channeling, the enhanced oil recovery and the remaining oil saturation. . The method for obtaining wettability evaluation parameters provided in the embodiments of the present application is based on a spontaneous imbibition experiment. Firstly, shale of a shale reservoir is obtained and a target sample is made, and then a spontaneous imbibition experiment is performed on the target sample.

In some embodiments, the target sample may be a regular columnar or cubic shale sample.

In some embodiments, before the spontaneous imbibition experiment is performed on the target sample, it also includes pretreatment of the target sample. For example, the target sample is cleaned first, and then the target sample is dried in an oven or a blast dryer at 60°C. At least 48h to reach a constant initial water saturation state and eliminate the influence of water saturation on the spontaneous imbibition behavior of the target sample.

In some embodiments, when the spontaneous imbibition experiment is performed on the target sample in the embodiments of the present application, the spontaneous imbibition experiment can be performed by using the device and method disclosed in the prior art. The spontaneous imbibition experiment can accurately obtain the experimental data that the water absorption of the target sample changes with the self-absorption time. At the same time, it can also obtain the water absorption rate, capillary force, water absorption, and ion dissolution data of the target sample.

Step S102: According to the spontaneous imbibition experiment data, the Debye model is used to determine the wettability evaluation parameters of the target sample.

For rock porous media, the spontaneous imbibition process is mainly composed of capillary force and gravity (flow resistance). In the initial stage of self-priming, the gravity factor has little effect on the self-priming volume or self-priming height. At this time, the gravity factor can be ignored, capillary force plays a leading role, and the self-priming volume at this stage is generally linear with the square root of the self-priming time However, the duration of this stage is different for different types of rock samples, reflecting the wettability and porosity characteristics of the rock samples themselves. However, after a certain self-priming time, the obstructive effect of gravity on self-priming cannot be ignored, otherwise the self-priming behavior will quickly approach infinity. Therefore, the influence of gravity becomes more and more important, except for the increase in gravity. In addition, the driving pressure difference also pushes the fluid to continuously advance from the bottom of the target sample to a higher position, that is, more and more capillary force will be consumed in the upward transport of the fluid, which makes the self-absorption rate increase over time The data points of the experimental measurement gradually deviate from the straight line, and the performance is similar to the Debye type "capacitor charging voltage curve" which increases rapidly and then slowly increases and tends to saturation.

According to the characteristics of the self-absorption rate of the target sample as a Debye-type "capacitor charging voltage curve" over time, the embodiment of the present application determines the wettability evaluation parameters of the target sample based on the spontaneous imbibition experiment combined with the Debye model, regardless of the direction of inhalation of the liquid. And the influence of fluid type, strong applicability, few parameters, simple calculation process and high accuracy. The wettability evaluation parameters calculated by the above method can effectively reflect the physical mechanism of the spontaneous imbibition of the target sample, can accurately and conveniently evaluate the wettability of the rock, and improve the development effect of oil and gas reservoirs.

In some embodiments, step S102 may include:

Step S1021: Establish a Debye model;

Step S1022: Fit the spontaneous imbibition experimental data with the Debye model, and determine the wettability evaluation parameters of the target sample.

Take the wettability evaluation parameter as the unknown parameter in the Debye model, and use the Debye model to fit the continuous experimental data obtained in the spontaneous imbibition experiment. For example, the spontaneous imbibition experiment data includes self-absorption time and self-absorption amount , The Debye model is used to fit the self-absorption time and the corresponding self-absorption amount, and the value of the unknown parameter in the Debye model is obtained as the wettability evaluation parameter of the target sample.

In some embodiments, the spontaneous imbibition experiment data includes self-priming time and self-priming amount, and the Debye model is:

in,

Is the self-priming time,

Is the self-priming volume,

Is the self-priming saturation value;

Is the weighting coefficient of the capillary force,

Is the weight coefficient of gravity;

Is the time threshold of capillary force,

Is the time threshold of gravity,

Is the relaxation time. Self-priming volume can be self-priming weight or self-priming height, dimensions are g and mm respectively; self-priming time

The dimension of can be min; self-absorption saturation value

The dimension of can be g; the force weight (the weight coefficient of the capillary force

And the weight coefficient of gravity

) Represents the relative contribution of capillary force and gravity, dimensionless; self-priming time threshold (time threshold of capillary force

And gravity time threshold

) And relaxation time

The physical mechanism of the spontaneous imbibition of the dominant target sample is determined from the time, and the dimension can be min.

Since the amount of self-priming at the initial stage of self-priming is generally linear with the square root of the self-priming time, after a period of time, the behavior is similar to the Debye type "capacitor charging voltage curve" that increases rapidly and then slowly increases and tends to saturation. The Debye model of the application example uses a second-order Debye decay function to fit the experimental data of spontaneous imbibition, and the second-order Debye decay function can be used to describe the relationship between the self-absorption amount and the self-absorption time in the whole time period. The second-order Debye attenuation function is used to fit the experimental data of spontaneous imbibition. The calculation process is simple and the degree of fit is high. There is no need to perform mathematical transformation of the experimental data of spontaneous imbibition and piecewise function fitting to obtain the slope respectively, and the calculated wetting The performance evaluation parameters are simple and effective, with few types, and can accurately evaluate the wettability of the target sample. At the same time, the method for obtaining wettability evaluation parameters provided by the embodiments of the present application realizes the organic integration of mathematical feature analysis and mechanism description, and can be widely used to evaluate the self-absorption characteristics and relative wettability of rocks.

In some embodiments, the wettability evaluation parameters may include one or more of self-priming saturation value, capillary force weighting coefficient, gravity weighting coefficient, capillary force time threshold, and gravity time threshold. .

The above-mentioned wettability evaluation parameters have clear physical meanings, and do not involve fluid characteristic parameters and the target sample's own characteristic parameters (such as viscosity, surface tension, porosity, density, permeability, saturation, contact angle, size parameters, etc.), It can well reflect the wettability of the target sample, and the wettability of the target sample can be evaluated according to the wettability evaluation parameters obtained by the above-mentioned wettability evaluation method. Among them, the self-absorption saturation value

And relaxation time

The larger, the better the wettability. Time threshold of gravity

The larger the value, the better the wettability; the weight coefficient of gravity

The larger the value, the better the wettability; the time threshold of capillary force

And capillary force

The evaluation effect is usually the opposite, the time threshold of capillary force action

The smaller the value, the better the wettability; the weight coefficient of capillary force

The smaller the value, the better the wettability. The above-mentioned multiple wettability evaluation parameters complement each other, have good reproducibility, and can be used to accurately and conveniently evaluate the wettability of the target sample. At the same time, this method can also be used for the evaluation of relative wettability. The relative wettability of different target samples is evaluated according to the evaluation parameter values of different target samples for extensive comparison.

Hereinafter, the method for obtaining wettability evaluation parameters provided in the above application examples is verified in conjunction with specific examples.

Seven different shale cubes were selected as target samples, and they were marked as M-1, M-3, M-5, M-7, M-11, M-13, and M-14. The 7 target samples were respectively subjected to forward self-absorption (bedding and self-absorption, fluid suction direction parallel to the rock bedding) and reverse self-absorption (bedding self-absorption through bedding, fluid suction direction perpendicular to the rock bedding) permeation In the suction experiment, the self-absorption liquid is ^{distilled water with a density of 1.0g/cm 3} , and the experimental data of the self-absorption amount (g) and self-absorption time (min) over 20h are continuously collected. Then use the above-mentioned Debye model to fit the experimental data to obtain the wettability evaluation parameters, including the self-absorption saturation value

, Force weight, self-priming time threshold and relaxation time

. At the same time, in order to verify the accuracy of the above method, a contact angle experiment was performed on 7 target samples to obtain the contact angle of the target sample. Refer to Table 1 for specific data.

Table 1 The wettability evaluation parameter table of the target sample

Among them, DW stands for self-absorbent liquid as distilled water, P stands for bedding, and T stands for through bedding.

Generally, a contact angle of <90° means wetting, and >90° means non-wetting. According to the contact angle data in Table 1, the samples M-1, M-3 and M-13 are partial water wet, M-5 and M-14 partial oil wet (non-water wet), M-7 and M-11 Nearly neutral (mixed) wetting. The order of wettability from strong to weak is: M-3 (M-1)>M-13>M-7 (M-11)>M-5 (M-14). Layered layered self-absorption saturation value

The wettability reflected by the value (from large to small) is as follows: M-3>M-1>M-7(M-13)>M-11>M-5>M-14, layer by layer Relaxation time

The wettability reflected by the value (from large to small) is as follows: M-3>M-13>M-1>M-7(M-11)>M-14(M-5), along the layer Weight coefficient of bedding gravity

The reflected wettability is as follows: M-3>M-1>M-13>M-7(M-11)>M-14(M-5), the time threshold of bedding gravity action

The wettability reflected in the order is: M-3>M-1(M-5)>M-7(M-11) M-13>M-14.

It can be seen from the above that the wettability of the target sample reflected by the above-mentioned wettability evaluation parameters is basically the same as the contact angle, M-1, M-3 and M-13 are partial water and wet, M-5 and M-14 partial oil Wet (non-water wetting), M-7 and M-11 are close to neutral (mixed) wetting. Similarly, according to Table 1, the weight coefficient of bedding capillary force

, Time threshold of bedding capillary force

、Self-absorption saturation value

, Trans-bedded relaxation time

, The wettability of the target sample reflected by the weight of the stratification force and the self-absorption time threshold of the stratification are basically the same as the contact angle.

It can be seen from the combination of Figure 2 and Figure 7 that the wettability evaluation parameters of the target sample reflected by the wettability evaluation parameters obtained by the method for obtaining the wettability evaluation parameters provided by the embodiments of the present application are basically consistent with the contact angle experiment results, and the target The wettability of the sample is accurately evaluated. Under certain circumstances, such as the force weight and self-absorption saturation value corresponding to the bedding

Compared with the contact angle, it can reflect the wettability of the target sample more accurately.

At the same time, referring to Figs. 4-9, the data of the bedding and the bedding are basically the same. It can be seen that the method provided by the embodiment of the present application is not affected by the direction of the inhaled fluid and has strong applicability.

It should be understood that the size of the sequence number of each step in the foregoing embodiment does not mean the order of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

Referring to FIG. 10, an embodiment of the present application also provides a wettability evaluation parameter acquisition device, including:

The data acquisition module 21 is used to acquire the spontaneous imbibition experiment data obtained by performing the spontaneous imbibition experiment on the target sample;

The parameter determination module 22 is used to determine the wettability evaluation parameters of the target sample by using the Debye model according to the spontaneous imbibition experiment data.

In some embodiments, the parameter determination module 22 may include:

The model establishment unit 221 is used to establish a Debye model;

The parameter determination unit 222 is configured to fit the spontaneous imbibition experimental data using the Debye model, and determine the wettability evaluation parameters of the target sample.

in,

Is the self-priming time,

Is the self-priming volume,

Is the self-priming saturation value;

Is the weighting coefficient of the capillary force,

Is the weight coefficient of gravity;

Is the time threshold of capillary force,

Is the time threshold of gravity,

Is the relaxation time.

In some embodiments, the wettability evaluation parameter includes one or more of self-priming saturation value, capillary force weighting coefficient, gravity weighting coefficient, capillary force time threshold, and gravity time threshold.

In some embodiments, the target sample is a regular columnar or cubic shale sample.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, only the division of the above functional units and modules is used as an example. In practical applications, the above functions can be allocated to different functional units and modules as needed. Module completion, that is, the internal structure of the terminal device is divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist alone physically, or two or more units can be integrated into one unit. The above-mentioned integrated units can be hardware-based Formal realization can also be realized in the form of a software functional unit. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present application. For the specific working process of the units and modules in the above-mentioned device, reference may be made to the corresponding process in the foregoing method embodiment, which will not be repeated here.

FIG. 11 is a schematic block diagram of a terminal device provided by an embodiment of the present application. As shown in FIG. 11, the terminal device 4 of this embodiment includes: one or more processors 40, a memory 41, and a computer program 42 stored in the memory 41 and running on the processor 40. When the processor 40 executes the computer program 42, the steps in the above embodiments of the method for obtaining wettability evaluation parameters are implemented, for example, steps S101 to S102 shown in FIG. 1. Alternatively, when the processor 40 executes the computer program 42, the functions of the modules/units in the above-mentioned wettability evaluation parameter acquisition device embodiment, such as the functions of the modules 21 to 22 shown in FIG. 10, are realized.

Exemplarily, the computer program 42 may be divided into one or more modules/units, and the one or more modules/units are stored in the memory 41 and executed by the processor 40 to complete the application. One or more modules/units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 42 in the terminal device 4. For example, the computer program 42 may be divided into a data acquisition module 21 and a parameter determination module 22.

Other modules or units will not be repeated here.

The terminal device 4 includes but is not limited to a processor 40 and a memory 41. Those skilled in the art can understand that FIG. 11 is only an example of a terminal device, and does not constitute a limitation on the terminal device 4. It may include more or less components than shown in the figure, or a combination of certain components, or different components. For example, the terminal device 4 may also include an input device, an output device, a network access device, a bus, and the like.

The processor 40 may be a central processing unit (Central Processing Unit, CPU), other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), Application Specific Integrated Circuit (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

The memory 41 may be an internal storage unit of the terminal device, such as a hard disk or memory of the terminal device. The memory 41 may also be an external storage device of the terminal device, such as a plug-in hard disk equipped on the terminal device, a smart memory card (Smart Media Card, SMC), Secure Digital (SD) card, Flash Card, etc. Further, the memory 41 may also include both an internal storage unit of the terminal device and an external storage device. The memory 41 is used to store the computer program 42 and other programs and data required by the terminal device. The memory 41 can also be used to temporarily store data that has been output or will be output.

In the above-mentioned embodiments, the description of each embodiment has its own focus. For parts that are not described in detail or recorded in an embodiment, reference may be made to related descriptions of other embodiments.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

In the embodiments provided in this application, it should be understood that the disclosed terminal device and method may be implemented in other ways. For example, the terminal device embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components can be combined. Or it can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated module/unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, this application implements all or part of the processes in the above-mentioned embodiments and methods, and can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When executed by the processor, the steps of the foregoing method embodiments can be implemented. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file, or some intermediate forms. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), electrical carrier signal, telecommunications signal, and software distribution media, etc. It should be noted that the content contained in computer-readable media can be appropriately added or deleted in accordance with the requirements of the legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to the legislation and patent practice, computer-readable media does not include It is the electric carrier signal and the telecommunications signal.

The above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still compare the previous embodiments. The recorded technical solutions are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the application, and shall be included in the application Within the scope of protection.

Claims

A method for obtaining wettability evaluation parameters, which is characterized in that it comprises:

Obtain the spontaneous imbibition experiment data obtained from the spontaneous imbibition experiment on the target sample;

According to the spontaneous imbibition experimental data, the Debye model is used to determine the wettability evaluation parameters of the target sample.
The method for obtaining wettability evaluation parameters according to claim 1, wherein the determining the wettability evaluation parameters of the target sample by using the Debye model according to the spontaneous imbibition experimental data comprises:

Establishing the Debye model;

The Debye model is used to fit the spontaneous imbibition experimental data to determine the wettability evaluation parameters of the target sample.
The method for obtaining wettability evaluation parameters according to any one of claims 1 to 2, wherein the experimental data of spontaneous imbibition includes self-priming time and self-priming, and the Debye model is:

in,
Is the self-priming time,
Is the self-priming volume,
Is the self-priming saturation value;
Is the weighting coefficient of the capillary force,
Is the weight coefficient of gravity;
Is the time threshold of capillary force,
Is the time threshold of gravity,
Is the relaxation time.
The method for obtaining wettability evaluation parameters according to any one of claims 1 to 2, wherein the wettability evaluation parameters include: self-absorption saturation value, weighting coefficient of capillary force, and weighting coefficient of gravity , One or more of the time threshold of capillary force and the time threshold of gravity.
The method for obtaining wettability evaluation parameters according to any one of claims 1 to 2, wherein the target sample is a regular columnar or cubic shale sample.
A wettability evaluation parameter acquisition device, which is characterized in that it comprises:

The data acquisition module is used to acquire the spontaneous imbibition experiment data obtained by the spontaneous imbibition experiment on the target sample;

The parameter determination module is used to determine the wettability evaluation parameters of the target sample by using the Debye model according to the spontaneous imbibition experimental data.
7. The wettability evaluation parameter acquisition device according to claim 6, wherein the parameter determination module comprises:

A model establishment unit for establishing the Debye model;

The parameter determination unit is configured to use the Debye model to fit the spontaneous imbibition experimental data and determine the wettability evaluation parameters of the target sample.
The wettability evaluation parameter acquisition device according to any one of claims 6 to 7, wherein the experimental data of spontaneous imbibition includes self-priming time and self-priming, and the Debye model is:

in,
Is the self-priming time,
Is the self-priming volume,
Is the self-priming saturation value;
Is the weighting coefficient of the capillary force,
Is the weight coefficient of gravity;
Is the time threshold of capillary force,
Is the time threshold of gravity,
Is the relaxation time.
A terminal device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program as claimed in claims 1 to 5. Steps of any one of the methods for obtaining wettability evaluation parameters.
A computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to realize the wettability evaluation according to any one of claims 1 to 5 Steps of the parameter acquisition method.