Condensate oil-containing deep shale gas reservoir fracturing scheme making method and device

Abstract

The invention relates to a method and a device for formulating a fracturing scheme of a deep shale gas reservoir containing condensate oil. The fracturing scheme making method for the deep shale gas reservoir containing the gas condensate comprises the steps that first parameter data of effective hydrocarbon source rocks in a lithologic section are obtained; second parameter data is determined in a mapping relation according to the first parameter data, the mapping relation is the mapping relation between the first parameter data and the second parameter data, and the second parameter data is parameter data in the fracturing process; and according to the second parameter data, a fracturing scheme of the gas condensate-containing deep shale gas reservoir is determined.

Description

Technical Field

[0001] The present invention relates to the technical field of fracturing of deep shale condensate oil and gas reservoirs, and particularly relates to a method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil, a device for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil, an electronic device, and a storage medium. Background Art

[0002] In the related art, deep shale condensate oil and gas and deep shale gas usually follow the same type of construction pumping program, making it difficult to effectively exploit shale gas reservoirs containing deep condensate oil. Summary of the Invention

[0003] In view of this, the present invention provides a method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil, a device for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil, an electronic device, and a storage medium.

[0004] Specifically, the present invention is implemented by the following technical solutions:

[0005] According to a first aspect of the present invention, there is provided a method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil, which includes: obtaining first parameter data of effective hydrocarbon source rocks in a lithologic profile; determining second parameter data according to the first parameter data in a mapping relationship, where the mapping relationship is a mapping relationship between the first parameter data and the second parameter data, and the second parameter data is parameter data in a fracturing process; and determining a fracturing plan for a deep shale gas reservoir containing condensate oil according to the second parameter data.

[0006] The method for formulating a fracturing plan for a deep shale gas reservoir containing condensate mainly aims at a deep shale gas reservoir containing condensate. First, key data is obtained through existing logging data, that is, the first parameter data of the effective hydrocarbon source rock in the lithologic profile. Among them, the existing logging data is the data obtained by testing and interpreting using logging technology after the completion of the oil well. The logging data required for fracturing includes porosity, permeability, oil saturation, and brittle mineral content. The first parameter data can represent all the parameters of the effective hydrocarbon source rock in the lithologic profile, such as the thickness of the effective hydrocarbon source rock in the lithologic profile, permeability, oil saturation, etc. Further, after obtaining the first parameter data, the second parameter data is determined according to the first parameter data and the mapping relationship. Among them, the second parameter data is the parameter data in the fracturing process, such as the amount of fracturing fluid, the compressive strength grade of the proppant, etc. The mapping relationship refers to the mapping relationship between the first parameter data and the second parameter data, that is, each parameter data in the multiple first parameter data corresponds to a second parameter data respectively. According to the obtained first parameter data of the effective hydrocarbon source rock in the lithologic profile, the corresponding second parameter data in the fracturing process can be determined. Specifically, the fracturing difficulty can be analyzed based on the first parameter data of the effective hydrocarbon source rock, so as to determine the adopted fracturing process, and then the parameter data of the fracturing process, that is, the second parameter data, is determined by software calculation. Furthermore, after determining the second parameter data in the fracturing process, the fracturing plan for the deep shale gas reservoir containing condensate is determined according to the obtained second parameter data. Finally, the deep shale condensate oil and gas well is fractured using the finally obtained fracturing plan for the deep shale gas reservoir containing condensate. The method for formulating a fracturing plan for a deep shale gas reservoir containing condensate provided by the present invention can determine different fracturing process parameters according to the data information of the effective hydrocarbon source rock itself in different lithologic profiles, solve the problem of low production degree of condensate oil and gas in deep shale containing condensate, and improve the fracturing transformation effect.

[0007] In some embodiments, the first parameter data includes one or several combinations of the thickness of the effective hydrocarbon source rock in the lithologic profile, the porosity of the effective hydrocarbon source rock in the lithologic profile, the permeability of the effective hydrocarbon source rock in the lithologic profile, the oil saturation of the effective hydrocarbon source rock in the lithologic profile, the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile, and the temperature of the effective hydrocarbon source rock in the lithologic profile.

[0008] In this embodiment, the first parameter data may include the thickness of the effective hydrocarbon source rock in the lithologic profile, the porosity of the effective hydrocarbon source rock in the lithologic profile, the permeability of the effective hydrocarbon source rock in the lithologic profile, the oil saturation of the effective hydrocarbon source rock in the lithologic profile, the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile, and the temperature of the effective hydrocarbon source rock in the lithologic profile, etc. By obtaining the thickness, porosity, permeability, oil saturation, brittle mineral content, and temperature of the effective hydrocarbon source rock in the lithologic profile based on the existing logging data, and then determining the parameter data in the corresponding fracturing process according to the differences in the data of various parameters of the effective hydrocarbon source rock in the lithologic profile, personalized design is achieved.

[0009] In some embodiments, the second parameter data includes one or several combinations of the amount of fracturing fluid, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combination, the compressive strength grade of the proppant, and the viscosity of the slickwater.

[0010] In this embodiment, the second parameter data may be the amount of fracturing fluid, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combination, the compressive strength grade of the proppant, and the viscosity of the slickwater, etc. By determining different amounts of fracturing fluid, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combination, the compressive strength grade of the proppant, and the viscosity of the slickwater according to various different parameters of the effective hydrocarbon source rock in the lithologic profile, the requirements for determining the fracturing plan of the gas reservoir are met.

[0011] In some embodiments, the mapping relationships include: the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithologic profile and the amount of fracturing fluid and the range of construction displacement; the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile and the sand-fluid ratio in the proppant and the range of proppant particle size combination; the mapping relationship between the thickness of the effective hydrocarbon source rock in the lithologic profile and the compressive strength grade of the proppant; the mapping relationship between the temperature of the effective hydrocarbon source rock in the lithologic profile and the viscosity of the slickwater.

[0012] In this embodiment, the mapping relationship between the first parameter data and the second parameter data may include: the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithologic profile and the range of the fracturing fluid volume and the construction displacement; the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile and the range of the sand-fluid ratio in the proppant and the proppant particle size combination; the mapping relationship between the thickness of the effective hydrocarbon source rock in the lithologic profile and the compressive strength grade of the proppant; and the mapping relationship between the temperature of the effective hydrocarbon source rock in the lithologic profile and the viscosity of the slickwater, etc. For example: after obtaining the permeability of the effective hydrocarbon source rock in the lithologic profile, the range of the fracturing fluid volume and the construction displacement in the fracturing plan for the gas reservoir can be determined according to the permeability of the effective hydrocarbon source rock in the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithologic profile and the range of the fracturing fluid volume and the construction displacement; after obtaining the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile, the corresponding range of the sand-fluid ratio in the proppant and the proppant particle size combination can be determined according to the brittle mineral content in the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile and the range of the sand-fluid ratio in the proppant and the proppant particle size combination, where the proppant particle size combination may include: 100 / 200 mesh quartz sand, 70 / 140 mesh quartz sand, and 40 / 70 mesh ceramsite; after obtaining the thickness of the effective hydrocarbon source rock in the lithologic profile, the formation closure pressure of the reservoir can be predicted according to the thickness of the effective hydrocarbon source rock, and the compressive strength grade of the proppant can be determined according to the formation closure pressure; after obtaining the temperature of the effective hydrocarbon source rock in the lithologic profile, where the temperature of the effective hydrocarbon source rock can be predicted or obtained by measurement, and then the configuration parameters of the slickwater fracturing fluid system, i.e., the viscosity of the slickwater, can be determined according to the temperature of the effective hydrocarbon source rock. By establishing a mapping relationship between the first parameter data and the second parameter data, personalized fracturing process parameter settings can be realized according to the differences in reservoir permeability, brittle mineral content, formation closure pressure, and temperature.

[0013] According to a second aspect of the present invention, there is provided a device for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil. The device for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil includes: an acquisition module, where the acquisition module is used to acquire the first parameter data of the effective hydrocarbon source rock in the lithologic profile; a determination module, where the determination module is used to determine the second parameter data according to the first parameter data in the mapping relationship, where the mapping relationship is the mapping relationship between the first parameter data and the second parameter data, and the second parameter data is the parameter data in the fracturing process; and a formulation module, where the formulation module is used to determine the fracturing plan for the deep shale gas reservoir containing condensate oil according to the second parameter data.

[0014] The device for formulating a fracturing plan for a deep shale gas reservoir containing condensate mainly includes: an acquisition module, a determination module, and a formulation module. Among them, the device for formulating a fracturing plan for a deep shale gas reservoir containing condensate mainly targets deep shale gas reservoirs containing condensate. First, the acquisition module obtains key data through existing logging data, that is, the first parameter data of the effective hydrocarbon source rock in the lithologic profile. Among them, the existing logging data is the data obtained by testing and interpreting using logging technology after the completion of the oil well. The logging data required for fracturing includes porosity, permeability, oil saturation, and brittle mineral content. The first parameter data can represent all the parameters of the effective hydrocarbon source rock in the lithologic profile, such as the thickness of the effective hydrocarbon source rock in the lithologic profile, permeability, oil saturation, etc. Further, after obtaining the first parameter data, the determination module determines the second parameter data according to the first parameter data and the mapping relationship. Among them, the second parameter data is the parameter data in the fracturing process, such as the amount of fracturing fluid, the compressive strength grade of the proppant, etc. The mapping relationship refers to the mapping relationship between the first parameter data and the second parameter data, that is, each parameter data in the multiple first parameter data corresponds to a second parameter data respectively. According to the obtained first parameter data of the effective hydrocarbon source rock in the lithologic profile, the second parameter data in the corresponding fracturing process can be determined. Specifically, the difficulty of fracturing can be analyzed based on the first parameter data of the effective hydrocarbon source rock, so as to determine the fracturing process adopted, and then the parameter data of the fracturing process, that is, the second parameter data, is determined through software calculation. Furthermore, after determining the second parameter data in the fracturing process, the formulation module determines the fracturing plan for the gas reservoir according to the obtained second parameter data. Finally, the deep shale condensate oil and gas well is fractured using the finally obtained fracturing plan for the deep shale gas reservoir containing condensate. The method for formulating a fracturing plan for a deep shale gas reservoir containing condensate provided by the present invention can determine different fracturing process parameters according to the data information of the effective hydrocarbon source rock in different lithologic profiles, solve the problem of low utilization degree of deep shale condensate oil and gas containing condensate, and improve the fracturing transformation effect.

[0015] In some embodiments, the first parameter data includes one or several combinations of the thickness of the effective hydrocarbon source rock in the lithologic profile, the porosity of the effective hydrocarbon source rock in the lithologic profile, the permeability of the effective hydrocarbon source rock in the lithologic profile, the oil saturation of the effective hydrocarbon source rock in the lithologic profile, the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile, and the temperature of the effective hydrocarbon source rock in the lithologic profile.

[0016] In this embodiment, the first parameter data may include the thickness of the effective hydrocarbon source rock in the lithology profile, the porosity of the effective hydrocarbon source rock in the lithology profile, the permeability of the effective hydrocarbon source rock in the lithology profile, the oil saturation of the effective hydrocarbon source rock in the lithology profile, the brittle mineral content of the effective hydrocarbon source rock in the lithology profile, and the temperature of the effective hydrocarbon source rock in the lithology profile, etc. By obtaining the thickness, porosity, permeability, oil saturation, brittle mineral content, and temperature of the effective hydrocarbon source rock in the lithology profile based on the existing logging data, and then determining the parameter data in the corresponding fracturing process according to the differences in the data of various parameters of the effective hydrocarbon source rock in the lithology profile, personalized design is achieved.

[0017] In some embodiments, the second parameter data includes one or several combinations of the fracturing fluid volume, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combinations, the compressive strength grade of the proppant, and the viscosity of the slickwater.

[0018] In this embodiment, the second parameter data may be the fracturing fluid volume, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combinations, the compressive strength grade of the proppant, and the viscosity of the slickwater, etc. By determining different fracturing fluid volumes, ranges of construction displacement, sand-fluid ratios in the proppant, ranges of proppant particle size combinations, compressive strength grades of the proppant, and viscosities of the slickwater according to various different parameters of the effective hydrocarbon source rock in the lithology profile, the requirements for determining the fracturing plan for the gas reservoir are met.

[0019] In some embodiments, the mapping relationships include: the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithology profile and the fracturing fluid volume and the range of construction displacement; the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithology profile and the sand-fluid ratio in the proppant and the range of proppant particle size combinations; the mapping relationship between the thickness of the effective hydrocarbon source rock in the lithology profile and the compressive strength grade of the proppant; the mapping relationship between the temperature of the effective hydrocarbon source rock in the lithology profile and the viscosity of the slickwater.

[0020] In this embodiment, the mapping relationship between the first parameter data and the second parameter data may include: the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithology profile and the range of the fracturing fluid volume and the construction displacement; the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithology profile and the range of the sand-fluid ratio in the proppant and the proppant particle size combination; the mapping relationship between the thickness of the effective hydrocarbon source rock in the lithology profile and the compressive strength grade of the proppant; and the mapping relationship between the temperature of the effective hydrocarbon source rock in the lithology profile and the viscosity of the slickwater, etc. For example: after obtaining the permeability of the effective hydrocarbon source rock in the lithology profile, the range of the fracturing fluid volume and the construction displacement in the fracturing plan for the gas reservoir can be determined according to the permeability of the effective hydrocarbon source rock in the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithology profile and the range of the fracturing fluid volume and the construction displacement; after obtaining the brittle mineral content of the effective hydrocarbon source rock in the lithology profile, the corresponding range of the sand-fluid ratio in the proppant and the proppant particle size combination can be determined according to the brittle mineral content in the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithology profile and the range of the sand-fluid ratio in the proppant and the proppant particle size combination, where the proppant particle size combination may include: 100 / 200 mesh quartz sand, 70 / 140 mesh quartz sand, and 40 / 70 mesh ceramsite; after obtaining the thickness of the effective hydrocarbon source rock in the lithology profile, the formation closure pressure of the reservoir can be predicted according to the thickness of the effective hydrocarbon source rock, and the compressive strength grade of the proppant can be determined according to the formation closure pressure; after obtaining the temperature of the effective hydrocarbon source rock in the lithology profile, where the temperature of the effective hydrocarbon source rock can be predicted or obtained by measurement, and then the configuration parameters of the slickwater fracturing fluid system, i.e., the viscosity of the slickwater, can be determined according to the temperature of the effective hydrocarbon source rock. By establishing a mapping relationship between the first parameter data and the second parameter data, personalized fracturing process parameter settings can be realized according to the differences in reservoir permeability, brittle mineral content, formation closure pressure, and temperature.

[0021] According to a third aspect of the present invention, there is provided an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of the method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil in the first aspect or any possible implementation manner of the first aspect are implemented.

[0022] According to a fourth aspect of the present invention, there is provided a readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil in the first aspect or any possible implementation manner of the first aspect are implemented.

[0023] The technical solution provided by the present invention at least brings the following beneficial effects:

[0024] By implementing the method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil provided by the present invention, the problem of great construction difficulty in deep shale condensate oil and gas reservoirs is solved, the problem that it is difficult to effectively utilize the deep shale condensate oil and gas reservoir after fracturing is effectively solved, and the effect of efficiently fracturing and transforming the deep shale condensate oil and gas reservoir is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present invention and, together with the specification, are used to explain the principles of the present invention.

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in related technologies, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or related technologies. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic flow chart of the method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil provided by an embodiment of the present invention;

[0028] Figure 2 It is a schematic block diagram of the device for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil provided by an embodiment of the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0030] Figure 1 It is a schematic flow chart of the method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil provided by an embodiment of the present invention. The method may include the following steps:

[0031] S102: Obtain first parameter data of effective hydrocarbon source rocks in the lithologic profile;

[0032] S104: Determine second parameter data according to the first parameter data in the mapping relationship, where the mapping relationship is the mapping relationship between the first parameter data and the second parameter data, and the second parameter data is the parameter data in the fracturing process;

[0033] S106: Determine a fracturing plan for the deep shale gas reservoir containing condensate oil according to the second parameter data.

[0034] The method for formulating a fracturing plan for a deep shale gas reservoir containing condensate mainly aims at a deep shale gas reservoir containing condensate. First, key data is obtained through existing logging data, that is, the first parameter data of the effective hydrocarbon source rock in the lithologic profile. Among them, the existing logging data is the data obtained by testing and interpreting using logging technology after the completion of the oil well. The logging data required for fracturing includes porosity, permeability, oil saturation, and brittle mineral content. The first parameter data can represent all the parameters of the effective hydrocarbon source rock in the lithologic profile, such as the thickness, permeability, and oil saturation of the effective hydrocarbon source rock in the lithologic profile. Further, after obtaining the first parameter data, the second parameter data is determined according to the first parameter data and the mapping relationship. Among them, the second parameter data is the parameter data in the fracturing process, such as the volume of fracturing fluid and the compressive strength grade of the proppant. The mapping relationship refers to the mapping relationship between the first parameter data and the second parameter data, that is, each parameter data in the multiple first parameter data corresponds to a second parameter data respectively. According to the obtained first parameter data of the effective hydrocarbon source rock in the lithologic profile, the second parameter data in the corresponding fracturing process can be determined. Specifically, the difficulty of fracturing can be analyzed according to the first parameter data of the effective hydrocarbon source rock, so as to determine the fracturing process adopted, and then the parameter data of the fracturing process, that is, the second parameter data, is determined by software calculation. Furthermore, after determining the second parameter data in the fracturing process, the fracturing plan for the deep shale gas reservoir containing condensate is determined according to the obtained second parameter data. Finally, the deep shale condensate oil and gas well is fractured using the finally obtained fracturing plan for the deep shale gas reservoir containing condensate. The method for formulating a fracturing plan for a deep shale gas reservoir containing condensate provided by the present invention can determine different fracturing process parameters according to the data information of the effective hydrocarbon source rock itself in different lithologic profiles, solve the problem of low utilization degree of deep shale condensate oil and gas, and improve the fracturing transformation effect.

[0035] Further, the first parameter data includes one or several combinations of the thickness of the effective hydrocarbon source rock in the lithologic profile, the porosity of the effective hydrocarbon source rock in the lithologic profile, the permeability of the effective hydrocarbon source rock in the lithologic profile, the oil saturation of the effective hydrocarbon source rock in the lithologic profile, the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile, and the temperature of the effective hydrocarbon source rock in the lithologic profile.

[0036] In this embodiment, the first parameter data may include the thickness of the effective hydrocarbon source rock in the lithology profile, the porosity of the effective hydrocarbon source rock in the lithology profile, the permeability of the effective hydrocarbon source rock in the lithology profile, the oil saturation of the effective hydrocarbon source rock in the lithology profile, the brittle mineral content of the effective hydrocarbon source rock in the lithology profile, and the temperature of the effective hydrocarbon source rock in the lithology profile, etc. By obtaining the thickness, porosity, permeability, oil saturation, brittle mineral content, and temperature of the effective hydrocarbon source rock in the lithology profile based on the existing logging data, and then determining the parameter data in the corresponding fracturing process according to the differences in the data of various parameters of the effective hydrocarbon source rock in the lithology profile, personalized design is achieved.

[0037] Further, the second parameter data includes one or several combinations of the fracturing fluid volume, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combinations, the compressive strength grade of the proppant, and the viscosity of the slickwater.

[0038] In this embodiment, the second parameter data may be the fracturing fluid volume, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combinations, the compressive strength grade of the proppant, and the viscosity of the slickwater, etc. By determining different fracturing fluid volumes, ranges of construction displacement, sand-fluid ratios in the proppant, ranges of proppant particle size combinations, compressive strength grades of the proppant, and viscosities of the slickwater according to various different parameters of the effective hydrocarbon source rock in the lithology profile, the requirements for determining the fracturing plan for the gas reservoir are met.

[0039] Further, the mapping relationships include: the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithology profile and the fracturing fluid volume and the range of construction displacement; the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithology profile and the sand-fluid ratio in the proppant and the range of proppant particle size combinations; the mapping relationship between the thickness of the effective hydrocarbon source rock in the lithology profile and the compressive strength grade of the proppant; the mapping relationship between the temperature of the effective hydrocarbon source rock in the lithology profile and the viscosity of the slickwater.

[0040] In this embodiment, the mapping relationship between the first parameter data and the second parameter data may include: the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithology profile and the range of the fracturing fluid volume and the construction displacement rate; the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithology profile and the range of the sand - fluid ratio in the proppant and the proppant particle size combination; the mapping relationship between the thickness of the effective hydrocarbon source rock in the lithology profile and the compressive strength grade of the proppant; and the mapping relationship between the temperature of the effective hydrocarbon source rock in the lithology profile and the viscosity of the slickwater, etc. For example: after obtaining the permeability of the effective hydrocarbon source rock in the lithology profile, the range of the fracturing fluid volume and the construction displacement rate in the gas reservoir fracturing plan can be determined according to the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithology profile and the range of the fracturing fluid volume and the construction displacement rate; after obtaining the brittle mineral content of the effective hydrocarbon source rock in the lithology profile, the corresponding range of the sand - fluid ratio in the proppant and the proppant particle size combination can be determined according to the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithology profile and the range of the sand - fluid ratio in the proppant and the proppant particle size combination, where the proppant particle size combination may include: 100 / 200 - mesh quartz sand, 70 / 140 - mesh quartz sand, and 40 / 70 - mesh ceramsite; after obtaining the thickness of the effective hydrocarbon source rock in the lithology profile, the formation closure pressure of the reservoir can be predicted according to the thickness of the effective hydrocarbon source rock, and the compressive strength grade of the proppant can be determined according to the formation closure pressure; after obtaining the temperature of the effective hydrocarbon source rock in the lithology profile, where the temperature of the effective hydrocarbon source rock can be predicted or obtained by measurement, and then the configuration parameters of the slickwater fracturing fluid system, i.e., the viscosity of the slickwater, can be determined according to the temperature of the effective hydrocarbon source rock. By establishing the mapping relationship between the first parameter data and the second parameter data, personalized fracturing process parameter settings can be realized according to the differences in reservoir permeability, brittle mineral content, formation closure pressure, and temperature.

[0041] Exemplarily, the method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil provided by the present invention is as follows:

[0042] First, key data is obtained by interpreting the existing logging data, that is, the thickness, porosity, permeability, oil saturation, and brittle mineral content of the effective hydrocarbon source rock in the lithology profile. And according to the permeability and brittle mineral content range of the effective hydrocarbon source rock in the logging lithology profile, the optimization principle of the fracturing fluid volume and displacement rate of the reservoir is clarified. The range of the fracturing fluid volume and the construction displacement rate can be determined in the optimization principle. Among them, the optimization principle of the fracturing fluid volume and displacement rate of the reservoir refers to the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithology profile and the range of the fracturing fluid volume and the construction displacement rate, and the reservoir permeability refers to the permeability of the effective hydrocarbon source rock in the lithology profile. Specifically, as shown in Table 1,

[0043] Table 1

[0044]

[0045] Table 1 shows the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithology profile, the volume of fracturing fluid, and the range of construction displacement rate. Taking a reservoir thickness of 10 m as an example, when the reservoir permeability is less than 0.1 mD, the volume of fracturing fluid is generally greater than 5000 m 3 , and the construction displacement rate is 12 m 3 / min - 16 m 3 / min; when the reservoir permeability is between 0.1 mD and 1 mD, the volume of fracturing fluid is generally between 1500 m 3 -3000 m 3 , and the construction displacement rate is 10 m 3 / min - 12 m 3 / min; when the reservoir permeability is between 1 mD and 10 mD, the volume of fracturing fluid is generally between 500 m 3 -1000 m 3 , and the construction displacement rate is 8 m 3 / min - 10 m 3 / min; when the reservoir permeability is greater than 10 mD, the volume of fracturing fluid is generally less than 500 m 3 , and the construction displacement rate is 5 m 3 / min - 8 m 3 / min.

[0046] Furthermore, according to the brittle mineral content of the effective hydrocarbon source rock in the lithology profile, the preferred proppant principle is clarified. The preferred proppant principle can determine the range of sand - fluid ratio and proppant particle size combination: 100 / 200 - mesh quartz sand, 70 / 140 - mesh quartz sand, and 40 / 70 - mesh ceramsite; among them, the preferred proppant principle is the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithology profile, the sand - fluid ratio in the proppant, and the range of proppant particle size combination. Specifically, as shown in Table 2:

[0047] Table 2

[0048]

[0049] As can be seen from Table 2, the mapping relationship between the brittle mineral content in the lithology profile of the effective hydrocarbon source rock, the sand-fluid ratio in the proppant, and the range of proppant particle size combinations is as follows: when the brittle mineral content is greater than 75%, the sand-fluid ratio generally ranges from 6% to 14%, the proportion of 70 / 140 mesh quartz sand is 40% - 60%, and the proportion of 40 / 70 mesh ceramsite is 60% - 40%; when the brittle mineral content is between 50% and 75%, the sand-fluid ratio generally ranges from 4% to 14%, the proportion of 100 / 200 mesh quartz sand in the proppant combination is 10%, the proportion of 70 / 140 mesh quartz sand is 40% - 60%, and the proportion of 40 / 70 mesh ceramsite is 50% - 30%; when the brittle mineral content is between 25% and 50%, the sand-fluid ratio generally ranges from 4% to 14%, the proportion of 100 / 200 mesh quartz sand in the proppant combination is 10% - 20%, the proportion of 70 / 140 mesh quartz sand is 50% - 60%, and the proportion of 40 / 70 mesh ceramsite is 40% - 20%; when the brittle mineral content is less than 25%, the sand-fluid ratio generally ranges from 4% to 12%, the proportion of 100 / 200 mesh quartz sand in the proppant combination is 20% - 30%, the proportion of 70 / 140 mesh quartz sand is 60% - 70%, and the proportion of 40 / 70 mesh ceramsite is 20% - 10%.

[0050] Furthermore, according to the reservoir depth, i.e., the thickness of the effective hydrocarbon source rock, predict the formation closure pressure of the reservoir, clarify the preferred principle of the proppant compressive strength grade, and the compressive strength grade of the selected proppant can be determined in the preferred principle; specifically as shown in Table 3:

[0051] Table 3

[0052]

[0053] Table 3 shows the preferred principle of the compressive strength grade of different proppants under the formation closure pressure corresponding to different reservoir depths. When the formation closure pressure is less than 52 MPa, the minimum compressive strength grade of the selected proppant should be 52 MPa, and when the compressive strength grade is 52 MPa, the breakage rate ≤ 8.0%; when the formation closure pressure is between 52 MPa and 69 MPa, the minimum compressive strength grade of the selected proppant should be 69 MPa; when the formation closure pressure is between 69 and 86 MPa, the minimum compressive strength grade of the selected proppant should be 86 MPa, and when the compressive strength grade is 86 MPa, the breakage rate ≤ 8.0%; when the formation closure pressure is between 86 MPa and 103 MPa, the minimum compressive strength grade of the selected proppant should be 103 MPa, and when the compressive strength grade is 103 MPa, the breakage rate ≤ 8.0%.

[0054] Furthermore, according to the measured or predicted temperature data, clarify the configuration parameters of the slickwater fracturing fluid system; specifically as shown in Table 4, Table 4

[0055]

[0056] As can be seen from Table 4, the viscosities of the slickwater fracturing fluid system at different reservoir temperatures are shown. Among them, the variable-viscosity slickwater fracturing fluid system can be adjusted on-site. According to the viscosity range, it is divided into low-viscosity slickwater (v ≤ 5 mm 2 / s), medium-viscosity slickwater (5 mm 2 / s < v ≤ 10 mm 2 / s), and high-viscosity slickwater (10 mm 2 / s < v ≤ 20 mm 2 / s). When the reservoir temperature is 140°C, low-viscosity slickwater and medium-viscosity slickwater can be used in combination; when the reservoir temperature is 160°C, medium-viscosity slickwater and high-viscosity slickwater can be used in combination; when the reservoir temperature is 180°C, only high-viscosity slickwater can be used.

[0057] Finally, based on the above, the fracturing fluid volume, the range of construction displacement, the liquid ratio in the proppant, the range of proppant particle size combinations, the compressive strength grade of the proppant, and the viscosity of the slickwater fracturing fluid system are used to formulate a fracturing plan, and the formulated fracturing plan is used to perform fracturing operations on deep shale condensate gas wells.

[0058] Figure 2 FIG. is a schematic block diagram of a device for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil provided by an embodiment of the present invention. Among them, the device 20 for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil includes:

[0059] An acquisition module 202, configured to acquire first parameter data of effective hydrocarbon source rocks in a lithologic profile;

[0060] A determination module 204, configured to determine second parameter data according to the first parameter data in a mapping relationship, where the mapping relationship is a mapping relationship between the first parameter data and the second parameter data, and the second parameter data is parameter data in a fracturing process;

[0061] A formulation module 206, configured to determine a fracturing plan for a deep shale gas reservoir containing condensate oil according to the second parameter data.

[0062] The device 20 for formulating a fracturing plan for a deep shale gas reservoir containing condensate mainly includes: an acquisition module 202, a determination module 204, and a formulation module 206. Among them, the device 20 for formulating a fracturing plan for a deep shale gas reservoir containing condensate mainly targets the deep shale gas reservoir containing condensate. First, the acquisition module 202 obtains key data through existing well logging data, that is, the first parameter data of the effective hydrocarbon source rock in the lithologic profile. Among them, the existing well logging data is the data obtained by testing and interpreting using well logging technology after the completion of the oil well. The well logging data required for fracturing includes porosity, permeability, oil saturation, and brittle mineral content. The first parameter data can represent all the parameters of the effective hydrocarbon source rock in the lithologic profile, such as the thickness of the effective hydrocarbon source rock in the lithologic profile, permeability, oil saturation, etc. Further, after obtaining the first parameter data, the determination module 204 determines the second parameter data according to the first parameter data and the mapping relationship. Among them, the second parameter data is the parameter data in the fracturing process, such as the amount of fracturing fluid, the compressive strength grade of the proppant, etc. The mapping relationship refers to the mapping relationship between the first parameter data and the second parameter data, that is, each parameter data in the multiple first parameter data corresponds to a second parameter data respectively. According to the obtained first parameter data of the effective hydrocarbon source rock in the lithologic profile, the second parameter data in the corresponding fracturing process can be determined. Specifically, the difficulty level of fracturing can be analyzed according to the first parameter data of the effective hydrocarbon source rock, so as to determine the fracturing process adopted, and then the parameter data of the fracturing process, that is, the second parameter data, is determined through software calculation. Furthermore, after determining the second parameter data in the fracturing process, the formulation module 206 determines the fracturing plan for the deep shale gas reservoir containing condensate according to the obtained second parameter data. Finally, the deep shale condensate oil and gas well is fractured using the finally obtained fracturing plan for the deep shale gas reservoir containing condensate. The method for formulating a fracturing plan for a deep shale gas reservoir containing condensate provided by the present invention can determine different fracturing process parameters according to the data information of the effective hydrocarbon source rock in different lithologic profiles, solves the problem of low utilization degree of deep shale condensate oil and gas, and improves the fracturing transformation effect.

[0063] Further, the first parameter data includes one or several combinations of: the thickness of the effective hydrocarbon source rock in the lithologic profile, the porosity of the effective hydrocarbon source rock in the lithologic profile, the permeability of the effective hydrocarbon source rock in the lithologic profile, the oil saturation of the effective hydrocarbon source rock in the lithologic profile, the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile, and the temperature of the effective hydrocarbon source rock in the lithologic profile.

[0064] In this embodiment, the first parameter data may include the thickness of the effective hydrocarbon source rock in the lithology profile, the porosity of the effective hydrocarbon source rock in the lithology profile, the permeability of the effective hydrocarbon source rock in the lithology profile, the oil saturation of the effective hydrocarbon source rock in the lithology profile, the brittle mineral content of the effective hydrocarbon source rock in the lithology profile, and the temperature of the effective hydrocarbon source rock in the lithology profile, etc. By obtaining the thickness, porosity, permeability, oil saturation, brittle mineral content, and temperature of the effective hydrocarbon source rock in the lithology profile based on the existing logging data, and then determining the parameter data in the corresponding fracturing process according to the differences in the data of various parameters of the effective hydrocarbon source rock in the lithology profile, personalized design is achieved.

[0065] Furthermore, the second parameter data includes one or several combinations of the following: the amount of fracturing fluid, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combination, the compressive strength grade of the proppant, and the viscosity of the slickwater.

[0066] In this embodiment, the second parameter data may be the amount of fracturing fluid, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combination, the compressive strength grade of the proppant, and the viscosity of the slickwater, etc. By determining different amounts of fracturing fluid, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combination, the compressive strength grade of the proppant, and the viscosity of the slickwater according to various different parameters of the effective hydrocarbon source rock in the lithology profile, the requirements for determining the fracturing plan for the gas reservoir are met.

[0067] Furthermore, the mapping relationships include: the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithology profile and the amount of fracturing fluid and the range of construction displacement; the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithology profile and the sand-fluid ratio in the proppant and the range of proppant particle size combination; the mapping relationship between the thickness of the effective hydrocarbon source rock in the lithology profile and the compressive strength grade of the proppant; the mapping relationship between the temperature of the effective hydrocarbon source rock in the lithology profile and the viscosity of the slickwater.

[0068] In this embodiment, the mapping relationship between the first parameter data and the second parameter data may include: the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithologic profile and the range of the fracturing fluid volume and the construction displacement; the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile and the range of the sand - fluid ratio in the proppant and the proppant particle size combination; the mapping relationship between the thickness of the effective hydrocarbon source rock in the lithologic profile and the compressive strength grade of the proppant; and the mapping relationship between the temperature of the effective hydrocarbon source rock in the lithologic profile and the viscosity of the slickwater, etc. For example: after obtaining the permeability of the effective hydrocarbon source rock in the lithologic profile, the range of the fracturing fluid volume and the construction displacement in the fracturing plan for the gas reservoir can be determined according to the permeability of the effective hydrocarbon source rock in the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithologic profile and the range of the fracturing fluid volume and the construction displacement; after obtaining the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile, the corresponding range of the sand - fluid ratio in the proppant and the proppant particle size combination can be determined according to the brittle mineral content in the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile and the range of the sand - fluid ratio in the proppant and the proppant particle size combination, where the proppant particle size combination may include: 100 / 200 - mesh quartz sand, 70 / 140 - mesh quartz sand, and 40 / 70 - mesh ceramsite; after obtaining the thickness of the effective hydrocarbon source rock in the lithologic profile, the formation closure pressure of the reservoir can be predicted according to the thickness of the effective hydrocarbon source rock, and the compressive strength grade of the proppant can be determined according to the formation closure pressure; after obtaining the temperature of the effective hydrocarbon source rock in the lithologic profile, where the temperature of the effective hydrocarbon source rock can be predicted or obtained by measurement, and then the configuration parameters of the slickwater fracturing fluid system, i.e., the viscosity of the slickwater, can be determined according to the temperature of the effective hydrocarbon source rock. By establishing the mapping relationship between the first parameter data and the second parameter data, the personalized setting of fracturing process parameters is realized according to the differences in reservoir permeability, brittle mineral content, formation closure pressure, and temperature.

[0069] According to the third aspect of the present invention, there is provided an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of the method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil in the first aspect or any possible implementation manner of the first aspect are implemented.

[0070] According to the fourth aspect of the present invention, there is provided a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil in the first aspect or any possible implementation manner of the first aspect are implemented.

[0071] Although this specification contains many specific implementation details, these should not be construed as limiting the scope of any invention or the scope of what is claimed, but rather as mainly describing the features of specific embodiments of a particular invention. Certain features described in multiple embodiments in this specification can also be implemented in combination in a single embodiment. On the other hand, the various features described in a single embodiment can also be implemented separately in multiple embodiments or in any suitable sub-combination. Additionally, although features may function in certain combinations as described above and were even initially claimed as such, one or more features from the claimed combination can in some cases be removed from that combination, and the claimed combination can be directed to a sub-combination or a variation of a sub-combination.

[0072] Similarly, although operations are depicted in the figures in a particular order, this should not be construed as requiring that the operations be performed in the particular order shown or sequentially, or that all of the illustrated operations be performed to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous. Additionally, the separation of the various device modules and components in the above embodiments should not be construed as requiring such separation in all embodiments, and it should be understood that the described program components and devices can generally be integrated together in a single software product or packaged into multiple software products.

[0073] Thus, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the appended claims. In some cases, the acts recited in the claims can be performed in a different order and still achieve the desired result. Additionally, the processes depicted in the figures are not necessarily in the particular order or sequential order shown to achieve the desired result. In some implementations, multitasking and parallel processing may be advantageous.

[0074] It should be noted that, in this context, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements that are inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0075] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. The present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil, characterized in that, it includes: Obtain the first parameter data of the effective hydrocarbon source rock in the lithologic profile; Determine the second parameter data according to the first parameter data in the mapping relationship, wherein the mapping relationship is the mapping relationship between the first parameter data and the second parameter data, and the second parameter data is the parameter data in the fracturing process; Determine the fracturing plan for the deep shale gas reservoir containing condensate oil according to the second parameter data.

2. The method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil according to claim 1, characterized in that, The first parameter data includes: One or several combinations of the thickness of the effective hydrocarbon source rock in the lithologic profile, the porosity of the effective hydrocarbon source rock in the lithologic profile, the permeability of the effective hydrocarbon source rock in the lithologic profile, the oil saturation of the effective hydrocarbon source rock in the lithologic profile, the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile, and the temperature of the effective hydrocarbon source rock in the lithologic profile.

3. The method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil according to claim 1, characterized in that, The second parameter data includes: One or several combinations of the fracturing fluid volume, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combination, the compressive strength grade of the proppant, and the viscosity of the slickwater.

4. The method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil according to any one of claims 1 to 3, characterized in that, The mapping relationship includes: The mapping relationship between the permeability of the effective hydrocarbon source rock in the lithologic profile and the fracturing fluid volume and the range of construction displacement; The mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile and the sand-fluid ratio in the proppant and the range of proppant particle size combination; The mapping relationship between the thickness of the effective hydrocarbon source rock in the lithologic profile and the compressive strength grade of the proppant; The mapping relationship between the temperature of the effective hydrocarbon source rock in the lithologic profile and the viscosity of the slickwater.

5. A device for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil, characterized in that, it includes: An acquisition module, which is used to acquire the first parameter data of the effective hydrocarbon source rock in the lithologic profile; A determination module, which is used to determine the second parameter data according to the first parameter data in the mapping relationship, wherein the mapping relationship is the mapping relationship between the first parameter data and the second parameter data, and the second parameter data is the parameter data in the fracturing process; A formulation module, which is used to determine the fracturing plan for the deep shale gas reservoir containing condensate oil according to the second parameter data.

6. The device for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil according to claim 5, characterized in that, The first parameter data includes: One or several combinations of the thickness of the effective hydrocarbon source rock in the lithologic profile, the porosity of the effective hydrocarbon source rock in the lithologic profile, the permeability of the effective hydrocarbon source rock in the lithologic profile, the oil saturation of the effective hydrocarbon source rock in the lithologic profile, the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile, and the temperature of the effective hydrocarbon source rock in the lithologic profile.

7. The device for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil according to claim 5, characterized in that, the second parameter data includes: One or several combinations of the fracturing fluid volume, the range of construction displacement, the sand-fluid ratio in the proppant, the range of proppant particle size combinations, the compressive strength grade of the proppant, and the viscosity of the slickwater.

8. The device for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil according to any one of claims 5 to 7, characterized in that, the mapping relationship includes: the mapping relationship between the permeability of the effective hydrocarbon source rock in the lithologic profile and the fracturing fluid volume and the range of construction displacement; the mapping relationship between the brittle mineral content of the effective hydrocarbon source rock in the lithologic profile and the sand-fluid ratio in the proppant and the range of proppant particle size combinations; the mapping relationship between the thickness of the effective hydrocarbon source rock in the lithologic profile and the compressive strength grade of the proppant; the mapping relationship between the temperature of the effective hydrocarbon source rock in the lithologic profile and the viscosity of the slickwater.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, when the processor executes the computer program, the steps of the method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil according to any one of claims 1 to 4 are implemented.

10. A readable storage medium, on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the steps of the method for formulating a fracturing plan for a deep shale gas reservoir containing condensate oil according to any one of claims 1 to 4 are implemented.

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