Geological engineering integrated parameter boundary determination method and system and computer equipment

Abstract

The invention provides a geological engineering integrated parameter boundary determination method and system and computer equipment, and belongs to the field of unconventional oil and gas reservoir development. The geological engineering integration parameter boundary determination method comprises the following steps: acquiring a single well recoverable reserve boundary value; determining a plurality of geological parameters and engineering parameters of the target area, and obtaining a range value of each geological parameter and a range value of each engineering parameter; obtaining a plurality of data volume files according to the range value of each geological parameter and the range value of each engineering parameter; inputting the plurality of data volume files into an oil reservoir numerical simulation model, simulating and operating simulation production schemes corresponding to the data volume files through the oil reservoir numerical simulation model, and obtaining single well recoverable reserves of the simulation production schemes in preset time; and according to the single-well recoverable reserve limit value and the single-well recoverable reserves of the plurality of simulation production schemes in the preset time, searching an optimal geological parameter limit value and an optimal engineering parameter limit value in the sample matrix.

Description

Technical Field

[0001] The present invention relates to the technical field of unconventional oil and gas reservoir development, and in particular to a method for determining geological and engineering integrated parameter limits, a geological and engineering integrated parameter limit determination system, a computer device and a computer-readable storage medium. Background Art

[0002] The production of unconventional oil and gas reservoirs is closely related to the geological conditions and the effect of reservoir transformation. At present, the boundaries are still mainly obtained by separating geology and engineering. That is, in terms of geology, reservoir description and reservoir numerical simulation are used to obtain the limits of parameters such as oil layer thickness, permeability, and saturation to optimize the "sweet spot" for well deployment; in terms of engineering, on the basis of the well locations determined by geology, modeling and fracturing numerical simulation are used to obtain the limits of parameters such as fracturing transformation volume to guide fracturing construction. The above-mentioned method of separately obtaining parameter limits by geology and engineering ignores the mutual relationship between the two and cannot be considered as a whole to obtain the globally optimal parameter limits.

[0003] In addition, the specific operation method for obtaining parameter limits is mainly single factor analysis, that is, when obtaining a specific parameter limit, the values ​​of other parameters are fixed to obtain the relationship curve between the target parameter and the production well output, and the limit value is obtained according to the shape of the curve. The limitation of using single factor analysis in multi-parameter problems is that it ignores the interaction between factors, and the reliability of the results obtained is not high, which is only applicable to the situation where the factors are independent of each other. Summary of the invention

[0004] In order to solve the above-mentioned technical defects, the present invention provides a method and system for determining the limits of geological and engineering integrated parameters, and computer equipment; the method for determining the limits of geological and engineering integrated parameters takes economic benefits as the starting point, analyzes geological parameters and engineering parameters as a whole, and obtains parameter limit values, which has the advantages of global optimization and high reliability.

[0005] The first aspect of the present invention provides a method for determining geological and engineering integrated parameter limits, which is applied to the development of unconventional oil and gas reservoirs, comprising:

[0006] Obtaining economic data of oil and gas reservoirs in the target area, and calculating the limit value of recoverable reserves of a single well in the target area based on the economic data;

[0007] Determine the geological parameters and engineering parameters of the target area, and obtain the range value of each geological parameter and the range value of each engineering parameter;

[0008] The range values ​​of each geological parameter and the range values ​​of each engineering parameter are sampled to obtain a sample matrix;

[0009] Obtain multiple data volume files according to the sample matrix;

[0010] Inputting a plurality of data body files into a reservoir numerical simulation model, simulating and running the simulated production schemes corresponding to the data body files through the reservoir numerical simulation model, and obtaining the recoverable reserves of a single well in a preset time for each simulated production scheme;

[0011] According to the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production schemes within a preset time, the optimal geological parameter limit value and engineering parameter limit value are searched in the sample matrix.

[0012] In an embodiment of the present invention, the economic data includes oil and gas prices in the target area and well construction costs in the target area;

[0013] The calculating of the single well recoverable reserves limit value of the target area based on the economic data includes:

[0014] According to the oil and gas prices in the target area and the well construction costs in the target area, the technical and economic limit evaluation method is used to calculate the limit value of recoverable reserves of a single well in the target area.

[0015] In the embodiment of the present invention, the sampling of the range values ​​of each geological parameter and the range values ​​of each engineering parameter to obtain a sample matrix includes:

[0016] Sampling the range value of each geological parameter to obtain a plurality of geological parameter samples;

[0017] Sampling the range value of each engineering parameter to obtain multiple engineering parameter samples;

[0018] A sample matrix is ​​formed according to a plurality of geological parameter samples and a plurality of engineering parameter samples.

[0019] In the embodiment of the present invention, the step of obtaining a plurality of data volume files according to the sample matrix includes:

[0020] Set the data volume file to be generated with geological parameters and engineering parameters as variable parameters;

[0021] Extract the parameter values ​​of the geological parameters in the sample matrix and assign them to the geological parameters in the data volume file to be generated;

[0022] Extracting the parameter values ​​of the engineering parameters corresponding to the parameter values ​​of the geological parameters in the sample matrix, and assigning them to the engineering parameters in the data volume file to be generated;

[0023] Generate a data volume file based on the data volume file to be generated after the assignment is completed.

[0024] In the embodiment of the present invention, the inputting of multiple data files into the reservoir numerical simulation model, simulating and running the simulated production schemes corresponding to the data files through the reservoir numerical simulation model, and obtaining the recoverable reserves of a single well in each simulated production scheme within a preset time include:

[0025] Inputting multiple data volume files into the reservoir numerical simulation model as simulated production plans respectively;

[0026] Each simulated production plan is run through the reservoir numerical simulation model, and the recoverable reserves of a single well within the preset time corresponding to each simulated production plan are output.

[0027] In the embodiment of the present invention, searching for the optimal geological parameter limit value and engineering parameter limit value in the sample matrix according to the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production schemes within a preset time includes:

[0028] Compare the recoverable reserves of each single well with the limit value of recoverable reserves of the single well respectively, and obtain multiple comparison results;

[0029] Selecting multiple comparison results that meet preset comparison results from multiple comparison results as preferred comparison results; and obtaining multiple single-well recoverable reserves corresponding to the preferred comparison results;

[0030] Obtaining a plurality of corresponding data volume files according to the obtained single well recoverable reserves corresponding to the plurality of preferred comparison results;

[0031] Querying the parameter values ​​of geological parameters and engineering parameters of a plurality of corresponding data volume files in the sample matrix;

[0032] The data volume file having the minimum parameter values ​​of the geological parameters and the engineering parameters in multiple corresponding data volume files is selected as the optimal data volume file, and the parameter values ​​of the geological parameters in the optimal data volume file are used as the geological parameter limit values, and the parameter values ​​of the engineering parameters in the optimal data volume file are used as the engineering parameter limit values.

[0033] In the embodiment of the present invention, the preset comparison result is: the recoverable reserves of a single well is greater than the limit value of the recoverable reserves of a single well.

[0034] The second invention of the present invention provides a geological engineering integrated parameter limit determination system, comprising:

[0035] A calculation unit, used to obtain economic data of oil and gas reservoirs in a target area, and calculate a limit value of recoverable reserves of a single well in the target area based on the economic data;

[0036] A data volume file generating unit is used to determine the geological parameters and engineering parameters of the target area, obtain the range value of each geological parameter and the range value of each engineering parameter, sample the range value of each geological parameter and the range value of each engineering parameter to obtain a sample matrix, and generate a data volume file according to the sample matrix;

[0037] The reservoir numerical simulation model simulates and runs the simulated production schemes corresponding to the input data body files according to the input data body files, and obtains the recoverable reserves of a single well in a preset time for each simulated production scheme;

[0038] The geological and engineering parameter limit value determination unit is used to search for the optimal geological parameter limit value and engineering parameter limit value in the sample matrix according to the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production plans within a preset time.

[0039] A third aspect of the present invention provides a computer device, comprising:

[0040] Memory;

[0041] Processor; and

[0042] Computer programs;

[0043] Wherein, the computer program is stored in a memory and is configured to be executed by a processor to implement the geological-engineering integrated parameter limit determination method as described above.

[0044] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the method for determining geological-engineering integrated parameter limits as described above.

[0045] Through the above technical scheme, economic data in the target area are collected, and economic benefits are taken as the starting point. The geological parameters and engineering parameters are taken as an overall parameter to conduct an overall analysis of their impact on the recoverable reserves of a single well. On the one hand, the mutual influence between the geological parameter limits and the engineering parameter limits is avoided, and the global optimal parameter limit value can be obtained. On the other hand, the limitations of single factor analysis are avoided, and the reliability of the parameter limit results is improved, which has good promotion and application value.

[0046] Other features and advantages of the technical solution of the present invention will be described in detail in the specific implementation section below. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0048] Figure 1 It is a flow chart of a method for determining geological-engineering integrated parameter limits provided by an embodiment of the present invention;

[0049] Figure 2 It is a cross-plot of "oil saturation-permeability" parameters provided by an embodiment of the present invention;

[0050] Figure 3 It is a parameter cross-plot of "oil saturation-effective thickness" provided by an embodiment of the present invention;

[0051] Figure 4 It is a parameter cross-plot of "oil saturation-fracture transformation volume" provided by an embodiment of the present invention;

[0052] Figure 5 It is a structural block diagram of a geological engineering integrated parameter limit determination system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the technical solutions and advantages of the embodiments of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the process of realizing the present invention, the inventors found that the current boundary determination is still mainly based on the separation of geology and engineering, that is, in terms of geology, through reservoir description and reservoir numerical simulation, the parameters such as oil layer thickness, permeability, saturation, etc. are determined to optimize the "sweet spot" for well deployment; in terms of engineering, on the basis of the well location determined by geology, through modeling and fracturing numerical simulation, the parameters such as fracturing transformation volume are determined to guide fracturing construction; the above-mentioned method of separately determining the parameter boundaries of geology and engineering ignores the mutual relationship between the two, and cannot be considered as a whole to obtain the globally optimal parameter boundaries. In addition, the current specific operation method for obtaining parameter boundaries is mainly single factor analysis, that is, when obtaining a specific parameter boundary, the values ​​of other parameters are fixed to obtain the relationship curve between the target parameter and the production well output, and the boundary value is obtained according to the shape of the curve. The limitation of using single factor analysis in multi-parameter problems is that it ignores the interaction between factors, and the reliability of the obtained results is not high, and it is only applicable to situations where the factors are independent of each other.

[0056] In response to the above problems, an embodiment of the present invention provides a method for determining the limits of geological and engineering integrated parameters, which is applied to the development of unconventional oil and gas reservoirs, including: obtaining economic data of oil and gas reservoirs in the target area, and calculating the limit value of recoverable reserves of a single well in the target area based on the economic data; determining multiple geological parameters and multiple engineering parameters in the target area, and obtaining the range value of each geological parameter and the range value of each engineering parameter; sampling the range value of each geological parameter and the range value of each engineering parameter to obtain a sample matrix; obtaining multiple data body files according to the sample matrix; inputting the multiple data body files into a reservoir numerical simulation model, simulating and running the simulated production plans corresponding to the data body files through the reservoir numerical simulation model, and obtaining the recoverable reserves of a single well for each simulated production plan within a preset time; searching for the optimal geological parameter limit value and engineering parameter limit value in the sample matrix according to the limit value of recoverable reserves of a single well and the recoverable reserves of a single well for multiple simulated production plans within a preset time. The present invention collects economic data in the target area, takes economic benefits as the starting point, and conducts an overall analysis of the influence of geological parameters and engineering parameters on the recoverable reserves of a single well as an overall parameter. On the one hand, it avoids the mutual influence between the geological parameter limits and the engineering parameter limits, and can obtain the globally optimal parameter limit value. On the other hand, it avoids the limitations of single-factor analysis, improves the reliability of the parameter limit results, and has good promotion and application value.

[0057] Figure 1 Flow chart of a method for determining geological engineering integrated parameter limits provided by an embodiment of the present invention. Figure 1 As shown, this embodiment provides a method for determining the limit of geological and engineering integrated parameters, comprising the following steps:

[0058] S1. Obtaining economic data of oil and gas reservoirs in the target area, and calculating the limit value of recoverable reserves of a single well in the target area based on the economic data;

[0059] S2. Determine multiple geological parameters and multiple engineering parameters of the target area, obtain the range value of each geological parameter and the range value of each engineering parameter; sample the range value of each geological parameter and the range value of each engineering parameter to obtain a sample matrix; obtain multiple data volume files according to the sample matrix;

[0060] S3. Inputting a plurality of data body files into the reservoir numerical simulation model, simulating and running the simulated production schemes corresponding to the data body files through the reservoir numerical simulation model, and obtaining the recoverable reserves of a single well in each simulated production scheme within a preset time;

[0061] S4. Based on the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production plans within a preset time, search for the optimal geological parameter limit value and engineering parameter limit value in the sample matrix.

[0062] In step S1, the economic data includes oil and gas prices in the target area and well construction costs in the target area;

[0063] The calculating of the single well recoverable reserves limit value of the target area based on the economic data includes:

[0064] According to the oil and gas prices in the target area and the well construction costs in the target area, the technical and economic limit evaluation method is used to calculate the limit value of recoverable reserves of a single well in the target area.

[0065] In step S2, the range values ​​of each geological parameter and the range values ​​of each engineering parameter are sampled to obtain a sample matrix, including:

[0066] Sampling the range value of each geological parameter to obtain a plurality of geological parameter samples;

[0067] Sampling the range value of each engineering parameter to obtain multiple engineering parameter samples;

[0068] A sample matrix is ​​formed according to a plurality of geological parameter samples and a plurality of engineering parameter samples.

[0069] In this embodiment, the geological parameters include permeability, saturation and effective thickness. The engineering parameters are the fracturing transformation volume. The engineering parameters are the engineering parameters of the project that can be realized under the current technical conditions in the target area.

[0070] Specifically, a random sampling method is used to extract n (recommended to be greater than 1000) values ​​from each parameter range to form a one-dimensional vector, that is, the permeability vector K = (k 1 ,k 2 ,……,kn ), saturation vector S = (s 1 ,s 2 ,……,s n ), effective thickness vector H = (h 1 ,h 2 ,……,h n ), the fracturing transformation volume vector V = (v 1 ,v 2 ,……,v n ).

[0071] The four parameter vectors are sequentially organized into an n×4 sample matrix F=[K, S, H, V].

[0072] In step S2, the step of obtaining a plurality of data volume files according to the sample matrix includes:

[0073] Set the data volume file to be generated with geological parameters and engineering parameters as variable parameters;

[0074] Extract the parameter values ​​of the geological parameters in the sample matrix and assign them to the geological parameters in the data volume file to be generated;

[0075] Extracting the parameter values ​​of the engineering parameters corresponding to the parameter values ​​of the geological parameters in the sample matrix, and assigning them to the engineering parameters in the data volume file to be generated;

[0076] Generate a data volume file based on the data volume file to be generated after the assignment is completed.

[0077] Specifically, a single well numerical simulation data file is written as a data file to be generated, in which permeability, saturation, effective thickness and fracturing transformation volume are set as variable parameters. Furthermore, the fracturing transformation volume is replaced by the total length of the fracture.

[0078] Write a file operation computer program to assign the four parameters in the sample matrix F to the data volume file to be generated row by row, and obtain n data volume files, which are simulated production plans for n single well values. The geological parameters and engineering parameters in each simulated production plan vary randomly.

[0079] In step S3, the multiple data files are input into the reservoir numerical simulation model, and the simulated production schemes corresponding to the data files are simulated and run by the reservoir numerical simulation model to obtain the recoverable reserves of a single well in a preset time for each simulated production scheme, including:

[0080] Inputting multiple data volume files into the reservoir numerical simulation model as simulated production plans respectively;

[0081] Each simulated production plan is run through the reservoir numerical simulation model, and the reservoir numerical simulation model outputs the recoverable reserves of a single well within the preset time corresponding to each simulated production plan.

[0082] The above n data files are run by reservoir numerical simulation software. After the run is completed, the 15-year single-well recoverable reserves (i.e. recoverable reserves) data of each simulated production plan are obtained through data sorting, and then n "geological engineering parameters-single-well recoverable reserves" samples are obtained; among them, the "geological engineering parameters-single-well recoverable reserves" samples include geological engineering parameters and the single-well recoverable reserves corresponding to the geological engineering parameters.

[0083] In step S4, according to the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production schemes within a preset time, searching for the optimal geological parameter limit value and engineering parameter limit value in the sample matrix includes:

[0084] Compare the recoverable reserves of each single well with the limit value of recoverable reserves of the single well respectively, and obtain multiple comparison results;

[0085] Selecting multiple comparison results that meet preset comparison results from multiple comparison results as preferred comparison results; and obtaining multiple single-well recoverable reserves corresponding to the preferred comparison results;

[0086] Obtaining a plurality of corresponding data volume files according to the obtained single well recoverable reserves corresponding to the plurality of preferred comparison results;

[0087] Querying the parameter values ​​of geological parameters and engineering parameters of a plurality of corresponding data volume files in the sample matrix;

[0088] The data volume file having the minimum parameter values ​​of the geological parameters and the engineering parameters in multiple corresponding data volume files is selected as the optimal data volume file, and the parameter values ​​of the geological parameters in the optimal data volume file are used as the geological parameter limit values, and the parameter values ​​of the engineering parameters in the optimal data volume file are used as the engineering parameter limit values.

[0089] In step S4, the preset comparison result is: the recoverable reserves of a single well is greater than the limit value of the recoverable reserves of a single well.

[0090] Specifically, a parameter limit search computer program is written to search within the parameter range for a solution in which the recoverable reserves of a single well are greater than the recoverable reserves limit. The minimum parameter value corresponding to the solution is the optimal parameter value, and the optimal parameter value is the parameter limit value.

[0091] Write a computer program to search for solutions with recoverable reserves of a single well greater than the recoverable reserves limit value within the parameter range. The minimum parameter values ​​corresponding to the solutions include:

[0092] Set the search step size of the four parameters δk, δs, δh, and δv. The recommended step size is 1 / 100 of the absolute value of the maximum and minimum values ​​of the parameters. The smaller the step size, the more accurate the parameter boundary value is, but the higher the computer performance requirement is.

[0093] For n samples of “geological engineering parameters-recoverable reserves of a single well”, all samples are searched from the minimum parameter value to the maximum parameter value in step size. The search end conditions must be met at the same time: ① The recoverable reserves of all samples are greater than the recoverable reserves limit; ② The number of samples that meet condition ① is the largest.

[0094] The four parameter values ​​at the end of the output search are the geological parameter limit values ​​and the engineering parameter limit values.

[0095] In this embodiment, the method further includes step S5.

[0096] S5. Draw parameter cross plots to visually display parameter limit values ​​and their meanings.

[0097] The recoverable reserves of single wells in n schemes are plotted on the graph in the form of scattered points, with the horizontal and vertical coordinates being parameter 1 and parameter 2 (the other two parameters are represented by parameter 3 and parameter 4), and the point size representing the recoverable reserves. A solid black point represents that the recoverable reserves of a single well in this scheme are less than the recoverable reserves limit, and a hollow point represents that the recoverable reserves of a single well in this scheme are greater than the recoverable reserves limit.

[0098] Draw a vertical line with the horizontal axis equal to the limit value of parameter 1 and a horizontal line with the vertical axis equal to the limit value of saturation on the graph;

[0099] For the points in the upper right area, all solution points with parameter 3 less than the limit value and parameter 4 less than the limit value are eliminated, and the upper right area is all solution points that meet the requirement that recoverable reserves are greater than the recoverable reserves limit;

[0100] Repeat the above steps to draw Figure 2-4 The "oil saturation-permeability" parameter cross-plot, "oil saturation-effective thickness" parameter cross-plot, and "oil saturation-fracturing transformation volume" parameter cross-plot are shown. Figure 2 is a cross-plot of "oil saturation-permeability" parameters provided by an embodiment of the present invention, Figure 3 is a cross-plot of "oil saturation-effective thickness" parameters provided by an embodiment of the present invention, Figure 4 It is a cross-plot of "oil saturation-fracture stimulation volume" parameters provided by an embodiment of the present invention.

[0101] Figure 5 1 is a structural block diagram of a geological engineering integrated parameter limit determination system provided by an embodiment of the present invention. Figure 5As shown, the present embodiment provides a geological-engineering integrated parameter limit determination system, comprising: a calculation unit, used to obtain economic data of oil and gas reservoirs in a target area, and calculate the limit value of recoverable reserves of a single well in the target area based on the economic data; a data volume file generation unit, used to determine the geological parameters and engineering parameters of the target area, obtain the range value of each geological parameter and the range value of each engineering parameter, sample the range value of each geological parameter and the range value of each engineering parameter to obtain a sample matrix, and generate a data volume file according to the sample matrix; an oil reservoir numerical simulation model, based on multiple input data volume files, simulates and runs simulated production plans corresponding to the data volume files to obtain recoverable reserves of a single well in multiple simulated production plans within a preset time; a geological-engineering parameter limit value determination unit, used to search for the optimal geological parameter limit value and engineering parameter limit value in the sample matrix according to the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production plans within a preset time.

[0102] The geological engineering integrated parameter limit determination system is implemented by the geological engineering integrated parameter limit determination method as described above, and the method comprises:

[0103] S1. Obtaining economic data of oil and gas reservoirs in the target area, and calculating the limit value of recoverable reserves of a single well in the target area based on the economic data;

[0104] S2. Determine multiple geological parameters and multiple engineering parameters of the target area, obtain the range value of each geological parameter and the range value of each engineering parameter; sample the range value of each geological parameter and the range value of each engineering parameter to obtain a sample matrix; obtain multiple data volume files according to the sample matrix;

[0105] S3. Inputting a plurality of data body files into the reservoir numerical simulation model, simulating and running the simulated production schemes corresponding to the data body files through the reservoir numerical simulation model, and obtaining the recoverable reserves of a single well in each simulated production scheme within a preset time;

[0106] S4. Based on the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production plans within a preset time, search for the optimal geological parameter limit value and engineering parameter limit value in the sample matrix.

[0107] In step S1, the economic data includes oil and gas prices in the target area and well construction costs in the target area;

[0108] The calculating of the single well recoverable reserves limit value of the target area based on the economic data includes:

[0109] According to the oil and gas prices in the target area and the well construction costs in the target area, the technical and economic limit evaluation method is used to calculate the limit value of recoverable reserves of a single well in the target area.

[0110] In step S2, the range values ​​of each geological parameter and the range values ​​of each engineering parameter are sampled to obtain a sample matrix, including:

[0111] Sampling the range value of each geological parameter to obtain a plurality of geological parameter samples;

[0112] Sampling the range value of each engineering parameter to obtain multiple engineering parameter samples;

[0113] A sample matrix is ​​formed according to a plurality of geological parameter samples and a plurality of engineering parameter samples.

[0114] In this embodiment, the geological parameters include permeability, saturation and effective thickness. The engineering parameters are the fracturing transformation volume. The engineering parameters are the engineering parameters of the project that can be realized under the current technical conditions in the target area.

[0115] Specifically, a random sampling method is used to extract n (recommended to be greater than 1000) values ​​from each parameter range to form a one-dimensional vector, that is, the permeability vector K = (k 1 ,k 2, ……,k n ), saturation vector S = (s 1 ,s 2 ,……,s n ), effective thickness vector H = (h 1 ,h 2 ,……,h n ), the fracturing transformation volume vector V = (v 1 ,v 2 ,……,v n ).

[0116] The four parameter vectors are sequentially organized into an n×4 sample matrix F=[K, S, H, V].

[0117] In step S2, the step of obtaining a plurality of data volume files according to the sample matrix includes:

[0118] Set the data volume file to be generated with geological parameters and engineering parameters as variable parameters;

[0119] Extract the parameter values ​​of the geological parameters in the sample matrix and assign them to the geological parameters in the data volume file to be generated;

[0120] Extracting the parameter values ​​of the engineering parameters corresponding to the parameter values ​​of the geological parameters in the sample matrix, and assigning them to the engineering parameters in the data volume file to be generated;

[0121] Generate a data volume file based on the data volume file to be generated after the assignment is completed.

[0122] Specifically, a single well numerical simulation data file is written as a data file to be generated, in which permeability, saturation, effective thickness and fracturing transformation volume are set as variable parameters. Furthermore, the fracturing transformation volume is replaced by the total length of the fracture.

[0123] Write a file operation computer program to assign the four parameters in the sample matrix F to the data volume file to be generated row by row, and obtain n data volume files, which are simulated production plans for n single well values. The geological parameters and engineering parameters in each simulated production plan vary randomly.

[0124] In step S3, the multiple data files are input into the reservoir numerical simulation model, and the simulated production schemes corresponding to the data files are simulated and run by the reservoir numerical simulation model to obtain the recoverable reserves of a single well in a preset time for each simulated production scheme, including:

[0125] Inputting multiple data volume files into the reservoir numerical simulation model as simulated production plans respectively;

[0126] Each simulated production plan is run through the reservoir numerical simulation model, and the reservoir numerical simulation model outputs the recoverable reserves of a single well within the preset time corresponding to each simulated production plan.

[0127] The above n data files are run by reservoir numerical simulation software. After the run is completed, the 15-year single-well recoverable reserves (i.e. recoverable reserves) data of each simulated production plan are obtained through data sorting, and then n "geological engineering parameters-single-well recoverable reserves" samples are obtained; among them, the "geological engineering parameters-single-well recoverable reserves" samples include geological engineering parameters and the single-well recoverable reserves corresponding to the geological engineering parameters.

[0128] In step S4, according to the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production schemes within a preset time, searching for the optimal geological parameter limit value and engineering parameter limit value in the sample matrix includes:

[0129] Compare the recoverable reserves of each single well with the limit value of recoverable reserves of the single well respectively, and obtain multiple comparison results;

[0130] Selecting multiple comparison results that meet preset comparison results from multiple comparison results as preferred comparison results; and obtaining multiple single-well recoverable reserves corresponding to the preferred comparison results;

[0131] Obtaining a plurality of corresponding data volume files according to the obtained single well recoverable reserves corresponding to the plurality of preferred comparison results;

[0132] Querying the parameter values ​​of geological parameters and engineering parameters of a plurality of corresponding data volume files in the sample matrix;

[0133] The data volume file having the minimum parameter values ​​of the geological parameters and the engineering parameters in multiple corresponding data volume files is selected as the optimal data volume file, and the parameter values ​​of the geological parameters in the optimal data volume file are used as the geological parameter limit values, and the parameter values ​​of the engineering parameters in the optimal data volume file are used as the engineering parameter limit values.

[0134] In step S4, the preset comparison result is: the recoverable reserves of a single well is greater than the limit value of the recoverable reserves of a single well.

[0135] Specifically, a parameter limit search computer program is written to search within the parameter range for a solution in which the recoverable reserves of a single well are greater than the recoverable reserves limit. The minimum parameter value corresponding to the solution is the optimal parameter value, and the optimal parameter value is the parameter limit value.

[0136] Write a computer program to search for solutions with recoverable reserves of a single well greater than the recoverable reserves limit value within the parameter range. The minimum parameter values ​​corresponding to the solutions include:

[0137] Set the search step size of the four parameters δk, δs, δh, and δv. The recommended step size is 1 / 100 of the absolute value of the maximum and minimum values ​​of the parameters. The smaller the step size, the more accurate the parameter boundary value is, but the higher the computer performance requirement is.

[0138] For n samples of “geological engineering parameters-recoverable reserves of a single well”, all samples are searched from the minimum parameter value to the maximum parameter value in step size. The search end conditions must be met at the same time: ① The recoverable reserves of all samples are greater than the recoverable reserves limit; ② The number of samples that meet condition ① is the largest.

[0139] The four parameter values ​​at the end of the output search are the geological parameter limit values ​​and the engineering parameter limit values.

[0140] In this embodiment, the method further includes step S5.

[0141] S5. Draw parameter cross plots to visually display parameter limit values ​​and their meanings.

[0142] The recoverable reserves of single wells in n schemes are plotted on the graph in the form of scattered points, with the horizontal and vertical coordinates being parameter 1 and parameter 2 (the other two parameters are represented by parameter 3 and parameter 4), and the point size representing the recoverable reserves. A solid black point represents that the recoverable reserves of a single well in this scheme are less than the recoverable reserves limit, and a hollow point represents that the recoverable reserves of a single well in this scheme are greater than the recoverable reserves limit.

[0143] Draw a vertical line with the horizontal axis equal to the limit value of parameter 1 and a horizontal line with the vertical axis equal to the limit value of saturation on the graph;

[0144] For the points in the upper right area, all solution points with parameter 3 less than the limit value and parameter 4 less than the limit value are eliminated, and the upper right area is all solution points that meet the requirement that recoverable reserves are greater than the recoverable reserves limit;

[0145] Repeat the above steps to draw Figure 2-4 The "oil saturation-permeability" parameter cross-plot, "oil saturation-effective thickness" parameter cross-plot, and "oil saturation-fracturing transformation volume" parameter cross-plot are shown. Figure 2 is a cross-plot of "oil saturation-permeability" parameters provided by an embodiment of the present invention, Figure 3 is a cross-plot of "oil saturation-effective thickness" parameters provided by an embodiment of the present invention, Figure 4 It is a cross-plot of "oil saturation-fracture stimulation volume" parameters provided by an embodiment of the present invention.

[0146] This embodiment also provides specific simulated production plan data and single well recoverable reserves data of simulated production plan operation as shown in Table 1:

[0147] Table 1: 1000 sets of "geological engineering parameters - single well recoverable reserves" sample data table

[0148]

[0149] According to the data in Table 1, a method for determining the limits of geological and engineering integrated parameters includes:

[0150] A: Under the conditions of oil price of USD 60 / barrel and well construction cost of RMB 12 million per well, the recoverable reserves limit of single well benefit development is 1.17×10 4 t;

[0151] B: The range values ​​of the four parameters of the target area are collected, with the permeability range of 0.1-0.5 mD, the saturation range of 0.3-0.65, the effective thickness range of 3-15 m, and the fracturing volume range of 50×10 4 ~250×10 4 m 3 ;

[0152] C: A 1000×4 sample matrix is ​​drawn from the parameter range using random sampling, as shown in the 2nd to 4th columns of Table 1.

[0153] D: Write numerical simulation data file, simulate horizontal section length of 1000m, vertical and horizontal wells are fracturing 10 sections, and other model parameters are based on the actual parameters of the target area;

[0154] E: Use a file operation computer program to assign the four parameters of each row in the sample matrix to the data body file, thereby obtaining a simulated production plan. After the assignment of 1000 rows is completed, 1000 simulated production plans are obtained;

[0155] F: Eclipse reservoir numerical simulation software was used to run 1000 simulated production plans, and the single well recoverable reserves of each plan were output, thereby obtaining 1000 sets of "geological engineering parameters-single well recoverable reserves" samples, as shown in Table 1;

[0156] G: The parameter limit search computer program was used to obtain the parameter limit values. The search steps of the four parameters were set to 1 / 100 of the absolute value of the parameter range. The search results were as follows: permeability limit value 0.3mD, saturation limit value 0.47, effective thickness limit value 8.2m, and fracturing stimulation volume limit value 150×10 4 m 3 ;

[0157] H: Draw parameter cross plots, such as Figure 2 , Figure 3 , Figure 4 As shown in the figure, the recoverable reserves of the schemes with a value greater than the parameter limit are all higher than the recoverable reserves limit by 1.17×10 4 t, indicating that the use of this set of parameter limits to optimize geological “sweet spots” and guide fracturing construction can achieve economically efficient development.

[0158] The embodiment of the present invention further provides a computer device, including: a memory, a processor and a computer program, wherein the computer program is stored in the memory and is configured to be executed by the processor to implement the above-mentioned geological-engineering integrated parameter limit determination method.

[0159] The embodiment of the present invention further provides a machine-readable storage medium having computer program instructions stored thereon, and the computer program instructions, when executed by a processor, implement the above-mentioned method for determining geological-engineering integrated parameter limits.

[0160] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present invention may be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0161] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0162] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0163] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0164] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0165] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for determining the limits of geological and engineering integrated parameters, applied to the development of unconventional oil and gas reservoirs, characterized in that: The method comprises: Obtaining economic data of oil and gas reservoirs in the target area, and calculating the limit value of recoverable reserves of a single well in the target area based on the economic data; Determine multiple geological parameters and multiple engineering parameters of the target area, and obtain the range value of each geological parameter and the range value of each engineering parameter; The range values ​​of each geological parameter and the range values ​​of each engineering parameter are sampled to obtain a sample matrix; Obtain multiple data volume files according to the sample matrix; Inputting a plurality of data body files into a reservoir numerical simulation model, simulating and running the simulated production schemes corresponding to the data body files through the reservoir numerical simulation model, and obtaining the recoverable reserves of a single well in a preset time for the plurality of simulated production schemes; According to the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production schemes within a preset time, the optimal geological parameter limit value and engineering parameter limit value are searched in the sample matrix.

2. The method for determining the geological engineering integrated parameter limit according to claim 1, characterized in that: The economic data include oil and gas prices in the target area and well construction costs in the target area; The calculating of the single well recoverable reserves limit value of the target area based on the economic data includes: According to the oil and gas prices in the target area and the well construction costs in the target area, the technical and economic limit evaluation method is used to calculate the limit value of recoverable reserves of a single well in the target area.

3. The method for determining the geological engineering integrated parameter limit according to claim 1, characterized in that: The sample matrix is ​​obtained by sampling the range values ​​of each geological parameter and the range values ​​of each engineering parameter, including: Sampling the range value of each geological parameter to obtain a plurality of geological parameter samples; Sampling the range value of each engineering parameter to obtain multiple engineering parameter samples; A sample matrix is ​​formed according to a plurality of geological parameter samples and a plurality of engineering parameter samples.

4. The method for determining the geological-engineering integrated parameter limit according to claim 3, characterized in that: The method of obtaining a plurality of data volume files according to the sample matrix includes: Set the data volume file to be generated with geological parameters and engineering parameters as variable parameters; Extract the parameter values ​​of the geological parameters in the sample matrix and assign them to the geological parameters in the data volume file to be generated; Extracting the parameter values ​​of the engineering parameters corresponding to the parameter values ​​of the geological parameters in the sample matrix, and assigning them to the engineering parameters in the data volume file to be generated; Generate a data volume file based on the data volume file to be generated after the assignment is completed.

5. The method for determining the limit of geological and engineering integrated parameters according to claim 1, characterized in that: The method of inputting a plurality of data files into a reservoir numerical simulation model, simulating and running the simulated production schemes corresponding to the data files through the reservoir numerical simulation model, and obtaining the recoverable reserves of a single well in a preset time for the plurality of simulated production schemes includes: Inputting multiple data volume files into the reservoir numerical simulation model as simulated production plans respectively; Each simulated production plan is run through the reservoir numerical simulation model, and the recoverable reserves of a single well within the preset time corresponding to each simulated production plan are output.

6. The method for determining the geological-engineering integrated parameter limit according to claim 3, characterized in that: The searching for the optimal geological parameter limit value and engineering parameter limit value in the sample matrix according to the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production schemes within a preset time includes: Compare the recoverable reserves of each single well with the limit value of recoverable reserves of the single well respectively, and obtain multiple comparison results; Selecting multiple comparison results that meet preset comparison results from multiple comparison results as preferred comparison results; and obtaining multiple single-well recoverable reserves corresponding to the preferred comparison results; Obtaining a plurality of corresponding data volume files according to the obtained single well recoverable reserves corresponding to the plurality of preferred comparison results; Querying the parameter values ​​of geological parameters and engineering parameters of a plurality of corresponding data volume files in the sample matrix; The data volume file having the minimum parameter values ​​of the geological parameters and the engineering parameters in multiple corresponding data volume files is selected as the optimal data volume file, and the parameter values ​​of the geological parameters in the optimal data volume file are used as the geological parameter limit values, and the parameter values ​​of the engineering parameters in the optimal data volume file are used as the engineering parameter limit values.

7. The method for determining the limits of geological and engineering integrated parameters according to claim 6, characterized in that: The preset comparison result is: the recoverable reserves of a single well are greater than the limit value of the recoverable reserves of a single well.

8. A geological engineering integrated parameter limit determination system, characterized in that: include: A calculation unit, used to obtain economic data of oil and gas reservoirs in a target area, and calculate a limit value of recoverable reserves of a single well in the target area based on the economic data; A data volume file generating unit is used to determine the geological parameters and engineering parameters of the target area, obtain the range value of each geological parameter and the range value of each engineering parameter, sample the range value of each geological parameter and the range value of each engineering parameter to obtain a sample matrix, and generate a data volume file according to the sample matrix; The reservoir numerical simulation model is used to simulate and run the simulated production schemes corresponding to the inputted multiple data body files, and obtain the recoverable reserves of a single well in the multiple simulated production schemes within a preset time; The geological and engineering parameter limit value determination unit is used to search for the optimal geological parameter limit value and engineering parameter limit value in the sample matrix according to the single well recoverable reserves limit value and the single well recoverable reserves of multiple simulated production plans within a preset time.

9. A computer device, characterized in that: include: Memory; processor; as well as Computer programs; Wherein, the computer program is stored in a memory and is configured to be executed by a processor to implement the method for determining geological and engineering integrated parameter limits as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement the method for determining geological-engineering integrated parameter limits as described in any one of claims 1 to 7.

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