Logging rock mechanical parameter dynamic and static conversion method and related equipment

Abstract

The invention discloses a dynamic and static conversion method for logging rock mechanical parameters and related equipment, and provides a technical method for improving the dynamic and static conversion precision of the logging rock mechanical parameters on the premise of not adding multiple groups of extra experiments and establishing a complex parameter formula in consideration of the lithologic influence. The method comprises the following steps: firstly, creating a lithologic index Lit curve for a logging curve reflecting lithologic information; a lithology index Lit curve is used as a coefficient and multiplied by dynamic and static rock mechanical parameters to obtain corrected rock mechanical parameters, then dynamic and static rock mechanical parameter fitting is carried out on the corrected dynamic and static rock mechanical parameters to obtain a fitting formula, the formula with the highest fitting degree is preferably selected, then the static rock mechanical parameter value of the whole well section is calculated, and the static rock mechanical parameter value of the whole well section is calculated. And then dividing by the lithology index to restore the lithology so as to obtain the static rock mechanical parameters of the whole well section. The method is clear in steps, high in operability and fitting degree, controllable in result, free of additional devices and experimental work, and capable of saving time and cost.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum engineering, and specifically relates to a method for converting dynamic and static state of well logging rock mechanics parameters and related equipment. Background Art

[0002] With the large-scale development of unconventional oil and gas, the model of horizontal wells + large-scale hydraulic fracturing has achieved a breakthrough in production. Due to the rapid decline of unconventional oil and gas and the high cost of fracturing, refined fracturing and optimized fracturing scale are becoming increasingly important.

[0003] The real rock mechanical parameters of the sweet spot layer in unconventional oil reservoirs, such as Young's modulus, Poisson's ratio, and brittleness index, are of great significance to fracturing design. If dipole acoustic logging is available, direct fitting can be performed through the dipole acoustic P- and S-wave data, but it is often found that the relationship is rather chaotic and it is difficult to fit an effective P- and S-wave relationship. In addition, the lithology has a great influence on the P- and S-wave velocities, so the influence of lithology must be taken into account when interpreting rock mechanical parameters.

[0004] Different lithologies, such as shale, sandstone, limestone, and volcanic rock, are affected by the speed of sound wave transmission, and the calculated elastic moduli vary greatly. For the same lithology, different temperature and pressure conditions and different mineral contents will also result in different results. Therefore, the results obtained do not always have a good correlation. Taking sandstone reservoirs as an example, due to differences in rock particle size, mud content, and brittle mineral content, Young's modulus and Poisson's ratio show obvious changes. Therefore, lithology has a great influence on rock mechanical parameters. It is necessary to obtain a dynamic-static conversion formula through a single-well rock mechanical parameter logging interpretation model combined with test results calibration to reduce the error of dynamic-static conversion and provide reliability of interpretation.

[0005] So far, there are two commonly used methods for measuring rock mechanics parameters: dynamic method and static method. The geomechanical properties obtained by converting the propagation speed of ultrasonic waves in rocks measured by logging are called dynamic properties, and the mechanical properties obtained by static loading of rock samples in the laboratory and deformation are called static properties. Since logging data has the characteristics of high vertical resolution, good continuity, and economic reliability, how to establish a reasonable correlation, that is, to find a reasonable conversion method between dynamic and static rock mechanics parameters, is the key to accurately interpreting one-dimensional rock mechanics through logging. The usual practice is to fit the rock mechanics experiments of cores at corresponding depths with logging data, obtain dynamic and static fitting formulas, and convert the dynamic rock mechanics parameters of a single well into static rock mechanics parameters. This method has some problems in accuracy and cannot meet on-site needs.

[0006] Previous researchers have conducted experiments on limestone, granite, and sandstone, and obtained dynamic-static conversion formulas by studying the dynamic-static elastic parameter relationship. However, since the dynamic-static relationship between the dynamic and static elastic mechanical parameters obtained by the experiment is fitted through the intersection, the fitting degree is often not high, and the converted static rock mechanical parameters cannot meet the actual field use requirements. With the large-scale development of unconventional materials, this situation is becoming more and more common.

[0007] Rock mechanics experiments, through triaxial experiments and acoustic wave velocity experiments, obtain rock mechanics parameters under different lithologies. Compared with the rock mechanics parameters calculated using logging data, they are more accurate. However, in dynamic and static fitting, deviations in the fitting results are often found. Analysis shows that the influence of lithology is taken into account during rock mechanics experiments, while the influence of lithology is not fully considered when calculating rock mechanics parameters using logging data, resulting in large differences between the static rock mechanics parameters obtained from the coring experiment and the dynamic rock mechanics parameters interpreted from the corresponding logging data.

[0008] Previous studies have found that the relationship between rock density and dynamic and static mechanical parameters of different lithologies is better than porosity, and the correlation between rock density and Vp is better than Vs; the relationship between rock density, porosity or longitudinal and transverse wave velocity and Young's modulus is better than Poisson's ratio; dynamic Vp / Vs has a certain correlation with rock pores and physical properties. Young's modulus, Poisson's ratio and density ρ are related through Vp and Vs, and Vp and Vs have different velocities in different lithology formations. Previous researchers have done a lot of experiments and studies to study the relationship between longitudinal and transverse wave velocities and lithology (Castagn et al., 2001). a1985, Han1986, Smith1987, Li Qingzhong1992, etc.), which confirmed that the longitudinal wave velocity changes faster than the shear wave velocity with the change of lithology; the acoustic wave data is used to calculate the rock mechanical parameters using the logging curve, and the acoustic wave velocity varies with the lithology and density. The density is taken into account in the Vp calculation formula, and the parameter characterization of the inverted lithological characteristics is lacking. Therefore, the present invention introduces GR, LID and RT that reflect the lithological characteristics to correct the rock mechanical parameters calculated by the logging curve, which is called the lithology index Lit.

[0009] He Shunyi et al. studied the method of obtaining rock mechanical parameters based on conventional logging data in 2008, and believed that the formulas for obtaining rock mechanical parameters can be established through regression between GR, AC, LID curves and Young's modulus and Poisson's ratio. Summary of the invention

[0010] The present invention provides a method for converting logging rock mechanics parameters from dynamic to static and related equipment, which solves the problem that the influence of lithology is not fully considered when calculating rock mechanics parameters using logging data, resulting in a large difference between the static rock mechanics parameters obtained from coring experiments and the dynamic rock mechanics parameters interpreted from the corresponding logging data.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A method for converting dynamic and static parameters of well logging rock mechanics parameters, comprising:

[0013] Obtain static rock mechanical parameters of the core;

[0014] According to the static rock mechanics parameters, the core depth information and the logging curve information corresponding to the core depth information are obtained, and the lithology index Lit curve is created;

[0015] Obtain dynamic rock mechanical parameters of the core;

[0016] According to the static rock mechanics parameters and the lithology index Lit curve, the corrected static rock mechanics parameters are obtained; according to the dynamic rock mechanics parameters and the lithology index Lit curve, the corrected dynamic rock mechanics parameters are obtained;

[0017] Calculate the static rock mechanical parameters of the entire well section according to the corrected static rock mechanical parameters and the corrected dynamic rock mechanical parameters;

[0018] The obtained static rock mechanical parameters of the entire well section are divided by the corresponding lithology index Lit to obtain the static rock mechanical parameters after lithology reduction.

[0019] Preferably, the static rock mechanics parameters of the core are obtained according to core experiments.

[0020] Preferably, the corrected static rock mechanics parameters are obtained by: multiplying the static rock mechanics parameters by the lithology index Lit curve at the same depth;

[0021] Corrected dynamic rock mechanics parameters: The dynamic rock mechanics parameters are also multiplied by the lithology index Lit curve at the same depth.

[0022] Preferably, the dynamic rock mechanics parameters of the core are obtained according to a regional model or an empirical formula.

[0023] Preferably, the method for calculating the static rock mechanics parameters of the entire well section is specifically as follows: fitting the static rock force parameters corrected by the lithology index Lit obtained from the core experiment with the dynamic rock mechanics parameters corrected by the lithology index Lit obtained from the corresponding depth logging, selecting the type with the highest fitting degree as the fitting formula used to fit the rock mechanics parameters of the entire well section, and calculating the static rock mechanics parameters of the entire well section.

[0024] Preferably, the lithology index Lit curve includes a Lit_GR curve, a Lit_LID curve and a Lit_RT curve.

[0025] Preferably, the lithology index Lit curve formula is:

[0026]

[0027] Where X is the value of the well logging curve that is closely related to lithology; Lit (log) is the lithology index.

[0028] A dynamic-static conversion system for logging rock mechanical parameters, comprising:

[0029] Static parameter acquisition module: obtain static rock mechanics parameters of the core;

[0030] Lit curve acquisition module: obtains core depth information and logging curve information corresponding to the core depth information according to static rock mechanics parameters, and creates lithology index Lit curve;

[0031] Dynamic parameter acquisition module: obtain dynamic rock mechanics parameters of the core;

[0032] Correction module: obtain the corrected static rock mechanics parameters according to the static rock mechanics parameters and the lithology index Lit curve, and obtain the corrected dynamic rock mechanics parameters according to the dynamic rock mechanics parameters and the lithology index Lit curve;

[0033] Full well section calculation module: calculates the static rock mechanics parameters of the full well section according to the corrected static rock mechanics parameters and the corrected dynamic rock mechanics parameters;

[0034] Conversion module: Divide the obtained static rock mechanical parameters of the entire well section by the corresponding lithology index Lit to obtain the static rock mechanical parameters after reducing the lithology.

[0035] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method for dynamic-static conversion of well logging rock mechanical parameters are implemented.

[0036] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for dynamic-static conversion of logging rock mechanical parameters are implemented.

[0037] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a method for dynamic-static conversion of logging rock mechanics parameters and related equipment. Due to different lithologies, the static rock mechanics obtained by experiment and the dynamic rock mechanics parameters interpreted by logging have large differences in fitting accuracy during fitting, and the accuracy of dynamic-static conversion is not high. In order to meet the needs of the field, the general practice is to perform dynamic-static conversion by doing many groups of experimental data, which requires a long experimental time and high cost, and also depends on the accuracy of the experiment; secondly, it depends on and considers multiple groups of parameters, establishes cumbersome formula derivation and combination, and is difficult to calculate quickly. Taking into account the above-mentioned lithology influence, the present invention proposes a technical method for improving the accuracy of dynamic-static conversion of logging rock mechanics parameters without adding additional multiple groups of experiments and establishing complex parameter formulas. First, a lithology index Lit curve is created for the logging curve reflecting lithology information; the lithology index Lit curve is used as a coefficient to obtain the corrected rock mechanics parameters, and then the static rock mechanics parameter value of the entire well section is calculated according to the corrected dynamic and static rock mechanics parameters, and then divided by the lithology index to restore the lithology, thereby obtaining the static rock mechanics parameters of the entire well section. The method has clear steps, high operability and fitting degree, controllable results, no additional equipment and experimental work are required, and time and cost are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a flow chart of a method for converting dynamic and static well logging rock mechanical parameters according to the present invention;

[0039] Figure 2 This is a block diagram of a dynamic-static conversion system for well logging rock mechanical parameters of the present invention;

[0040] Figure 3 This is a fitted diagram of the static Young's modulus Lit (RT) after correction according to an embodiment of the present invention;

[0041] Figure 4 This is a corrected fitting diagram of the dynamic and static Young's modulus Lit(GR) of an embodiment of the present invention;

[0042] Figure 5 This is a direct fitting diagram of the static Young's modulus of the experiment and the dynamic Young's modulus of the logging according to the embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0047] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Limited by the number of coring wells, the number of corings and the experimental costs, it is generally difficult to obtain the static rock mechanics parameters obtained from the experiment of the complete target layer of a single well, so the rock mechanics data interpreted from the logging data becomes very important. How to control the quality of the model interpreted by logging and improve the accuracy of the interpretation involves calibrating and converting the rock mechanics data obtained from the experiment and logging to static and dynamic data, so as to obtain an interpretation model suitable for the entire well section or the entire area. Therefore, the present invention takes into account the influence of reservoir lithology and adopts a method of eliminating the influence of lithology before fitting and restoring lithology after fitting, thereby improving the accuracy of dynamic and static conversion and the accuracy of logging interpretation of rock mechanics.

[0050] like Figure 1 As shown, the present invention provides a method for dynamic-static conversion of well logging rock mechanical parameters, comprising:

[0051] S101 obtains static rock mechanical parameters of the core;

[0052] S102 obtains core depth information and logging curve information corresponding to the core depth information according to static rock mechanics parameters, and creates a lithology index Lit curve;

[0053] S103 obtains dynamic rock mechanics parameters of the core;

[0054] S104 obtains corrected static rock mechanics parameters according to the static rock mechanics parameters and the lithology index Lit curve, and obtains corrected dynamic rock mechanics parameters according to the dynamic rock mechanics parameters and the lithology index Lit curve;

[0055] S105 calculates the static rock mechanical parameters of the entire well section according to the corrected static rock mechanical parameters and the corrected dynamic rock mechanical parameters;

[0056] S106 divides the obtained static rock mechanical parameters of the entire well section by the corresponding lithology index Lit to obtain the static rock mechanical parameters after lithology reduction.

[0057] The static rock mechanical parameters of the core are obtained based on core experiments.

[0058] The corrected static rock mechanical parameters are obtained by multiplying the static rock mechanical parameters with the lithology index Lit curve at the same depth;

[0059] Corrected dynamic rock mechanics parameters: The dynamic rock mechanics parameters are also multiplied by the lithology index Lit curve at the same depth.

[0060] The dynamic rock mechanical parameters of the core are obtained based on regional models or empirical formulas.

[0061] The specific method for calculating the static rock mechanics parameters of the entire well section is as follows: the static rock force parameters corrected by the lithology index Lit obtained from the core experiment are fitted with the dynamic rock mechanics parameters corrected by the lithology index Lit obtained from the corresponding depth logging, and the type with the highest fitting degree is selected as the fitting formula used to fit the rock mechanics parameters of the entire well section to calculate the static rock mechanics parameters of the entire well section.

[0062] The lithology index Lit curve includes a Lit_GR curve, a Lit_LID curve and a Lit_RT curve.

[0063] The lithology index Lit curve formula is:

[0064]

[0065] Where X is the value of the well logging curve that is closely related to lithology; Lit (log) is the lithology index.

[0066] Another embodiment of the present invention provides a dynamic and static method for logging rock mechanics parameters, which can improve conversion accuracy, and specifically relates to rock mechanics experiments in unconventional fields and logging rock mechanics interpretation. The rock mechanics data obtained from experiments and logging are mainly multiplied by the lithology index Lit curve reflecting the lithology information, thereby improving the fitting accuracy, and then performing dynamic and static conversion, and then obtaining an interpretation model suitable for the entire well section or the entire area, thereby solving the problem that the difference between the dynamic rock mechanics and static rock mechanics results of logging interpretation is too large and does not conform to the actual underground situation. To achieve the above purpose, the present application provides a dynamic and static conversion method for logging rock mechanics parameters, the method comprising:

[0067] The first step is to measure the static rock mechanical parameters of the core based on the core experiment;

[0068] The second step is to select the logging curve reflecting the lithology information and create the lithology index Lit curve (such as Lit_GR, Lit_LID, Lit_RT, etc.) according to the core depth information and the corresponding logging curve information;

[0069] The formula of lithology index Lit curve is as follows:

[0070]

[0071] Where X is the logging curve value (continuous depth value) such as GR / RT which is closely related to lithology;

[0072] Lit (log), is the lithology index, which is a continuous curve, dimensionless, and has a value range of [0,1];

[0073] The third step is to calculate the dynamic rock mechanical parameters of the entire well section of a single well according to the regional model or empirical formula;

[0074] The fourth step is to multiply the static rock mechanical parameters obtained from the core experiment with the lithology index Lit curve at the same depth (named as Lit_GR, Lit_LID, Lit_RT corrected static rock mechanical parameters), and also multiply the dynamic rock mechanical parameters calculated for the entire well section with the lithology index Lit curve at the same depth (named as Lit_GR, Lit_LID, Lit_RT corrected dynamic rock mechanical parameters);

[0075] The fifth step is to fit the static rock force parameters corrected by the lithology index Lit obtained from the core experiment and the dynamic rock mechanics parameters corrected by the lithology index Lit obtained from the corresponding depth logging, and select the type with the highest degree as the fitting formula used to fit the rock mechanics parameters of the entire well section, and calculate the static rock mechanics parameters of the entire well section;

[0076] The sixth step is to divide the obtained static rock mechanical parameters of the entire well section by the corresponding lithology index Lit to obtain the static rock mechanical parameters after lithology reduction. The entire conversion process is clear and highly operable. It can improve the accuracy and efficiency of dynamic and static conversion without adding additional equipment, and can improve the accuracy of rock mechanical parameter calculation in unconventional reservoirs.

[0077] Another embodiment of the present invention provides a method for converting dynamic and static parameters of well logging rock mechanics parameters.

[0078] The following uses a coring well in a certain area as an example to explain this method in detail, and gives a specific application description on how to eliminate the influence of lithology and improve the accuracy of dynamic-static conversion:

[0079] The first step is to select a well with coring in the target layer and conduct uniaxial and triaxial rock mechanics tests on the cored samples, or select a well with rock mechanics tests already conducted in the target layer;

[0080] The second step is to conduct quality control on the rock mechanics experiment to ensure that the experimental results are reasonable; determine the static rock mechanics parameters at the core sampling test depth, such as static Young's modulus, static Poisson's ratio, static minimum horizontal principal stress, static maximum horizontal principal stress, etc.;

[0081] The third step is to interpret the logging data at the core sampling test depth according to the basic interpretation model to obtain dynamic rock mechanical parameters, such as static Young's modulus, static Poisson's ratio, static minimum horizontal principal stress, static maximum horizontal principal stress, etc.

[0082] The fourth step is to create a lithology index Lit curve (such as Lit(GR), Lit(LID), Lit(RT) and other curves) for the logging curve at the coring depth;

[0083] The formula of lithology index Lit curve is as follows:

[0084]

[0085] in:

[0086] X, is the logging curve value (continuous depth value) of GR / RT and other well logging curves that are closely related to lithology;

[0087] Lit (log), is the lithology index, which is a continuous curve, dimensionless, and has a value range of [0,1];

[0088] The fifth step is to obtain the corrected static rock mechanics parameters by multiplying the static rock mechanics and lithology index Lit curves;

[0089] Step 6: Similarly, the dynamic rock mechanical parameters at the coring depth are multiplied by the lithology index to obtain the corrected dynamic rock mechanical parameters; as shown in Tables 1 and 2;

[0090] Table 1 Schematic diagram of Lit(RT) correction for core experimental data and corresponding logging interpretation data (partial data) Table 2 Schematic diagram of Lit(GR) correction for core experimental data and corresponding logging interpretation data (partial data)

[0091]

[0092] The seventh step is to fit the corrected dynamic and static rock mechanics data in the table, select the type with the highest fitting degree as the fitting formula used to fit the rock mechanics parameters of the entire well section, and calculate the static rock mechanics parameters of the entire well section; Figure 3 , Figure 4 , Figure 5 As shown;

[0093] In the eighth step, the obtained static rock mechanical parameters of the entire well section are divided by the Lit lithology index to obtain the static rock mechanical parameters after lithology reduction.

[0094] It can be seen from the fitting diagram that the static rock mechanical parameters of the core experiment of this single well and the dynamic rock mechanical parameters of the corresponding logging depth have the highest fitting degree of the dynamic and static Young's modulus after normalization by Lit (RT) correction, which is better than the fitting effect of directly using experimental data and logging interpretation data. The static Young's modulus value of the entire well section (after Lit (RT) correction) can be obtained by using the fitting formula. The static Young's modulus value (after Lit (RT) correction) is divided by the Lit (RT) lithology index corresponding to each depth point to obtain the static Young's modulus value of the entire well section. The dynamic and static conversion formula of the Young's modulus of this single well is y = 1.0398x-0.1929 (R 2=0.9998). The Lit(GR) correction also meets the requirements. Here, the number of core experiments and lithology types need to be considered comprehensively.

[0095] Similarly, Poisson's ratio, maximum horizontal principal stress, and minimum horizontal principal stress can all go through the same processing process and obtain the corresponding conversion formula to obtain the most reasonable conversion formula and obtain the rock mechanics parameter value of the entire well section.

[0096] like Figure 2 The present invention also provides a dynamic-static conversion system for logging rock mechanical parameters, comprising:

[0097] Static parameter acquisition module: obtain static rock mechanics parameters of the core;

[0098] Lit curve acquisition module: obtains core depth information and logging curve information corresponding to the core depth information according to static rock mechanics parameters, and creates lithology index Lit curve;

[0099] Dynamic parameter acquisition module: obtain dynamic rock mechanics parameters of the core;

[0100] Correction module: obtain the corrected static rock mechanics parameters according to the static rock mechanics parameters and the lithology index Lit curve, and obtain the corrected dynamic rock mechanics parameters according to the dynamic rock mechanics parameters and the lithology index Lit curve;

[0101] Full well section calculation module: calculates the static rock mechanics parameters of the full well section according to the corrected static rock mechanics parameters and the corrected dynamic rock mechanics parameters;

[0102] Conversion module: Divide the obtained static rock mechanical parameters of the entire well section by the corresponding lithology index Lit to obtain the static rock mechanical parameters after reducing the lithology.

[0103] A terminal device is provided in one embodiment of the present invention. The terminal device of this embodiment includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned method embodiments are implemented. Alternatively, when the processor executes the computer program, the functions of the modules / units in the above-mentioned device embodiments are implemented.

[0104] The computer program may be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to accomplish the present invention.

[0105] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0106] The processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0107] The memory may be used to store the computer programs and / or modules, and the processor implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory.

[0108] If the module / unit integrated in the terminal device 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, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0109] Although the embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative and instructive, rather than restrictive. Under the guidance of the specification, a person skilled in the art can also make many forms without departing from the scope of protection of the claims of the present invention, all of which belong to the scope of protection of the present invention.

Claims

1. A method for dynamic and static conversion of well logging rock mechanical parameters, characterized in that: include: Obtain static rock mechanical parameters of the core; According to the static rock mechanics parameters, the core depth information and the logging curve information corresponding to the core depth information are obtained, and the lithology index Lit curve is created; Obtain dynamic rock mechanical parameters of the core; According to the static rock mechanics parameters and the lithology index Lit curve, the corrected static rock mechanics parameters are obtained; according to the dynamic rock mechanics parameters and the lithology index Lit curve, the corrected dynamic rock mechanics parameters are obtained; Calculate the static rock mechanical parameters of the entire well section according to the corrected static rock mechanical parameters and the corrected dynamic rock mechanical parameters; The obtained static rock mechanical parameters of the entire well section are divided by the corresponding lithology index Lit to obtain the static rock mechanical parameters after lithology reduction.

2. A method for dynamic-static conversion of well logging rock mechanical parameters according to claim 1, characterized in that: The static rock mechanical parameters of the core are obtained based on core experiments.

3. The method for dynamic-static conversion of well logging rock mechanical parameters according to claim 1, characterized in that: The corrected static rock mechanical parameters are obtained by multiplying the static rock mechanical parameters with the lithology index Lit curve at the same depth; Corrected dynamic rock mechanics parameters: The dynamic rock mechanics parameters are also multiplied by the lithology index Lit curve at the same depth.

4. The method for dynamic-static conversion of well logging rock mechanical parameters according to claim 1, characterized in that: The dynamic rock mechanical parameters of the core are obtained based on regional models or empirical formulas.

5. The method for dynamic-static conversion of well logging rock mechanical parameters according to claim 1, characterized in that: The specific method for calculating the static rock mechanics parameters of the entire well section is as follows: the static rock force parameters corrected by the lithology index Lit obtained from the core experiment are fitted with the dynamic rock mechanics parameters corrected by the lithology index Lit obtained from the corresponding depth logging, and the type with the highest fitting degree is selected as the fitting formula used to fit the rock mechanics parameters of the entire well section to calculate the static rock mechanics parameters of the entire well section.

6. The method for dynamic-static conversion of well logging rock mechanical parameters according to claim 1, characterized in that: The lithology index Lit curve includes a Lit_GR curve, a Lit_LID curve and a Lit_RT curve.

7. The method for dynamic-static conversion of well logging rock mechanical parameters according to claim 1, characterized in that: The lithology index Lit curve formula is: Where X is the value of the well logging curve that is closely related to lithology; Lit (log) is the lithology index.

8. A dynamic and static conversion system for logging rock mechanical parameters, characterized in that: include: Static parameter acquisition module: obtain static rock mechanics parameters of the core; Lit curve acquisition module: obtains core depth information and logging curve information corresponding to the core depth information according to static rock mechanics parameters, and creates lithology index Lit curve; Dynamic parameter acquisition module: obtain dynamic rock mechanics parameters of the core; Correction module: obtain the corrected static rock mechanics parameters according to the static rock mechanics parameters and the lithology index Lit curve, and obtain the corrected dynamic rock mechanics parameters according to the dynamic rock mechanics parameters and the lithology index Lit curve; Full well section calculation module: calculates the static rock mechanics parameters of the full well section according to the corrected static rock mechanics parameters and the corrected dynamic rock mechanics parameters; Conversion module: Divide the obtained static rock mechanical parameters of the entire well section by the corresponding lithology index Lit to obtain the static rock mechanical parameters after reducing the lithology.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for dynamic-static conversion of logging rock mechanical parameters as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of a method for dynamic-static conversion of well logging rock mechanical parameters as described in any one of claims 1 to 7 are implemented.

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