Natural gas generation potential determination method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses a natural gas generation potential determination method and device, electronic equipment and a storage medium. The method comprises the following steps: determining hydrocarbon gas component contents of a target sample under different temperature conditions, and determining natural gas generation potentials of the target sample under different temperature conditions according to the hydrocarbon gas component contents; determining adamantane yields of the target sample under different temperature conditions, and determining adamantane indexes of the target sample under different temperature conditions according to the adamantane yields; determining an adamantane index-natural gas generation potential fitting formula of the target sample according to the natural gas generation potential and the adamantane index; and determining a target adamantane index of a to-be-evaluated sample, and determining the natural gas generation potential of the to-be-evaluated sample according to the adamantane index-natural gas generation potential fitting formula and the target adamantane index. By adopting the scheme, the prediction problem of evaluating the natural gas generation potential in the deep high-over mature stage is solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of petroleum geological exploration, and in particular to a method, device, electronic device and storage medium for determining natural gas generation potential. Background Art

[0002] Evaluation of the natural gas generation potential in the high-overmature stage is one of the most important evaluation indicators in oil and gas exploration and is currently a common concern in the petroleum industry. It is particularly important under the special conditions of domestic oil and gas reservoirs.

[0003] The commonly used methods for evaluating the gas generation potential in the high-overmature evolution stage are the kerogen hydrogen mass balance method, the rock pyrolysis (Rock-Eval) method, and the gold tube closed pyrolysis method. However, these methods have many defects. For example, the kerogen hydrogen mass balance method only uses the balance of C and H elements to represent the transformation balance of the entire organic matter, which is very one-sided; the rock pyrolysis method is a rapid heating method and the temperature is usually below 600℃, so some hydrocarbons are not completely pyrolyzed, resulting in a very low amount of natural gas generated in the high-overmature evolution stage; the gold tube closed pyrolysis method establishes the relationship between EasyRo and gas generation, which has a poor indication of thermal maturity for actual geological samples, especially high-overmature marine source rocks and crude oil. Summary of the invention

[0004] The embodiments of the present invention provide a method, device, electronic device and storage medium for determining natural gas generation potential, so as to solve the prediction problem of evaluating natural gas generation potential in deep high-overmature stage, provide an important reference basis for oil and gas exploration and development, and have very good application prospects.

[0005] In a first aspect, an embodiment of the present invention provides a method for determining natural gas generation potential, comprising:

[0006] The hydrocarbon gas component content of the target sample under different temperature conditions, and the natural gas generation potential of the target sample under different temperature conditions is determined based on the hydrocarbon gas component content; the target sample includes a kerogen sample of a target hydrocarbon source rock and a target crude oil sample;

[0007] adamantane yield of the target sample under different temperature conditions, and determining the adamantane index of the target sample under different temperature conditions based on the adamantane yield;

[0008] According to the natural gas generation potential and the adamantane index, the adamantane index-natural gas generation potential fitting formula of the target sample is determined;

[0009] The target adamantane index of the sample to be evaluated is determined, and the natural gas generation potential of the sample to be evaluated is determined based on the adamantane index-natural gas generation potential fitting formula and the target adamantane index.

[0010] In a second aspect, an embodiment of the present invention further provides a device for determining natural gas generation potential, comprising:

[0011] A gas component content determination module is used to determine the hydrocarbon gas component content of a target sample under different temperature conditions, and determine the natural gas generation potential of the target sample under different temperature conditions based on the hydrocarbon gas component content; the target sample includes a kerogen sample of a target hydrocarbon source rock and a target crude oil sample;

[0012] an adamantane index determination module, for determining the adamantane yield of the target sample under different temperature conditions, and determining the adamantane index of the target sample under different temperature conditions according to the adamantane yield;

[0013] A fitting formula determination module is used to determine the adamantane index-natural gas generation potential fitting formula of the target sample based on the natural gas generation potential and the adamantane index;

[0014] The natural gas generation potential determination module is used to determine the target adamantane index of the sample to be evaluated, and determine the natural gas generation potential of the sample to be evaluated based on the adamantane index-natural gas generation potential fitting formula and the target adamantane index.

[0015] In a third aspect, an embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0016] one or more processors;

[0017] A storage device for storing one or more programs;

[0018] When the one or more programs are executed by the one or more processors, the one or more processors implement the method for determining natural gas generation potential described in any embodiment of the present invention.

[0019] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for determining the natural gas generation potential described in any embodiment of the present invention.

[0020] The embodiment of the present invention provides a method, device, electronic device and storage medium for determining natural gas generation potential, by determining the hydrocarbon gas component content of the target sample under different temperature conditions, and determining the natural gas generation potential of the target sample under different temperature conditions according to the hydrocarbon gas component content; the target sample includes a kerogen sample of a target hydrocarbon source rock and a target crude oil sample; determining the adamantane yield of the target sample under different temperature conditions, and determining the adamantane index of the target sample under different temperature conditions according to the adamantane yield; determining the adamantane index-natural gas generation potential fitting formula of the target sample according to the natural gas generation potential and the adamantane index; determining the target adamantane index of the sample to be evaluated, and determining the natural gas generation potential of the sample to be evaluated according to the adamantane index-natural gas generation potential fitting formula and the target adamantane index. Using the technical solution of the embodiment of the present invention, a thermal simulation experiment is performed on the hydrocarbon source rock or crude oil sample, and the gas components and the yield of adamantane compounds under different temperature conditions are determined. By calculating the trimethylmonoadamantane index, the fitting formula of adamantane parameters and natural gas generation potential of different samples is obtained, which can be extended to the evaluation of natural gas generation potential of adjacent wells or adjacent areas. Based on the quantitative analysis and parameter evaluation of adamantane compounds, a fitting relationship between the adamantane index and the natural gas generation potential was established using thermal simulation experiments, which solved the difficult problem of predicting the natural gas generation potential in the high-overmature stage of deep layers, provided an important reference basis for oil and gas exploration and development, and has very good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts. In the drawings:

[0022] Figure 1 is a flow chart of a method for determining natural gas generation potential provided in an embodiment of the present invention;

[0023] Figure 2 1 is a relationship diagram between adamantane index TMAI-1 and maturity (EasyRo) provided in an embodiment of the present invention;

[0024] Figure 3 is a relationship diagram between a measured vitrinite reflectance (Ro) and a calculated equivalent vitrinite reflectance provided in an embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of a fitting formula of the natural gas generation potential and the adamantane index TMAI-1 of a kerogen sample of a target hydrocarbon source rock provided in an embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of a fitting formula between the natural gas generation potential of a target crude oil sample and the adamantane index TMAI-1 provided in an embodiment of the present invention;

[0027] Figure 6 is a schematic structural diagram of a natural gas generation potential determination device provided in an embodiment of the present invention;

[0028] Figure 7 It is a structural schematic diagram of an electronic device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0031] Among them, the acquisition, storage, use and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations.

[0032] Figure 1 This is a flow chart of a method for determining natural gas generation potential provided in an embodiment of the present invention. This embodiment is applicable to the case of determining the generation potential of high-overmature natural gas. The method of this embodiment can be executed by a natural gas generation potential determination device, which can be implemented in hardware and / or software. The device can be configured in a server for determining natural gas generation potential. The method specifically includes the following steps:

[0033] S110, determining the hydrocarbon gas component content of the target sample under different temperature conditions, and determining the natural gas generation potential of the target sample under different temperature conditions based on the hydrocarbon gas component content.

[0034] Wherein, the target sample includes a kerogen sample of a target source rock and a target crude oil sample. In the embodiment of the invention, the kerogen sample of the target source rock in region A is taken as an example to determine the natural gas generation potential of the adjacent region of the kerogen sample of the target source rock. Taking the target crude oil sample of well B, the natural gas generation potential of the adjacent wells to well B is determined. The embodiment of the present invention can determine the natural gas generation potential of the adjacent regions or adjacent wells of the current region or current well by determining the natural gas generation potential of the current region or current well.

[0035] In the embodiment of the present invention, a thermal simulation experiment is performed on the target sample to measure the content of hydrocarbon gas components under different temperature conditions, and the natural gas generation potential of the target sample is determined based on the content of the hydrocarbon gas components.

[0036] As an optional but non-limiting implementation, the determining of the hydrocarbon gas component content of the target sample under different temperature conditions, and determining the natural gas generation potential of the target sample under different temperature conditions based on the hydrocarbon gas component content, includes but is not limited to steps A1-A3:

[0037] Step A1: Pre-treat the target source rock sample to obtain target kerogen.

[0038] Step A2: Divide the target kerogen into at least two groups of kerogen samples, conduct thermal simulation experiments on the at least two groups of kerogen samples under different temperature conditions, and determine the contents of at least two hydrocarbon gas components in the at least two groups of kerogen samples under different temperature conditions.

[0039] Step A3: Determine the natural gas generation potential of the at least two groups of kerogen samples under different temperature conditions based on the contents of the at least two hydrocarbon gas components.

[0040] Among them, the kerogen sample of the target source rock is the target kerogen obtained by pre-treating the target source rock, and the pre-treatment may refer to crushing the target source rock sample to obtain sample powder; removing inorganic impurities in the sample powder to obtain a treated sample; and obtaining the target kerogen from the treated sample through heavy liquid flotation.

[0041] The target kerogen is divided into groups, and a thermal simulation experiment is performed on the target kerogen at different temperatures in different groups to obtain multiple groups of hydrocarbon gases; the component contents of the multiple groups of hydrocarbon gases are determined; the component contents of the hydrocarbon gases of the target kerogen are shown in Table 1. The hydrocarbon gases include but are not limited to C1, C2, C3, C4 and C5.

[0042] Table 1 Hydrocarbon gas component content of target kerogen

[0043]

[0044] According to the hydrocarbon gas component content of the target kerogen, the natural gas generation potential of the target kerogen under different temperature conditions is determined respectively. In the embodiment of the present invention, the natural gas generation potential of the target kerogen is determined by the sum of the hydrocarbon gas component content of the kerogen and the maximum gas production. The formula for determining the natural gas generation potential of the target kerogen is:

[0045]

[0046] The sum of the hydrocarbon gas component contents may refer to the sum of the hydrocarbon gas component contents under different temperature conditions, and the maximum gas production may refer to selecting the maximum hydrocarbon gas component content from the sum of the hydrocarbon gas component contents under all temperature conditions as the maximum gas production. For example, as shown in Table 1, when determining the natural gas generation potential of the target kerogen when R0=1.02, the sum of the hydrocarbon gas component contents when R0=1.02 is determined to be 46.62 ml / g, and the maximum gas production is 156.97 ml / g, then the natural gas generation potential of the target kerogen when R0=1.02 is:

[0047]

[0048] In an optional scheme of an embodiment of the present invention, two sets of temperature rising programs are used to carry out a thermal simulation experiment on the target sample; the hydrocarbon gas component content of the target kerogen at different vitrinite reflectance R0 is obtained through the two sets of temperature rising programs.

[0049] As an optional but non-limiting implementation, the determining of the hydrocarbon gas component content of the target sample under different temperature conditions, and determining the natural gas generation potential of the target sample under different temperature conditions based on the hydrocarbon gas component content, further includes but is not limited to steps B1-B2:

[0050] Step B1: Divide the target crude oil sample into at least two groups of crude oil samples, conduct thermal simulation experiments on the at least two groups of crude oil samples under different temperature conditions, and determine the contents of at least two hydrocarbon gas components in the at least two groups of crude oil samples under different temperature conditions.

[0051] Step B2: determining the natural gas generation potential of the at least two groups of crude oil samples under different temperature conditions based on the contents of the at least two hydrocarbon gas components.

[0052] The target crude oil samples are grouped, and thermal simulation experiments are performed on the target crude oil samples at different temperatures in different groups to obtain multiple groups of hydrocarbon gases; the component contents of the multiple groups of hydrocarbon gases are determined; the hydrocarbon gas component contents of the target crude oil samples are shown in Table 2. The hydrocarbon gases include but are not limited to C1, C2, C3, C4 and C5.

[0053] Among them, according to the hydrocarbon gas component content of the target crude oil sample, the natural gas generation potential of the target crude oil sample under different temperature conditions is determined respectively. In the embodiment of the present invention, the natural gas generation potential of the target crude oil sample is determined by the sum of the hydrocarbon gas component content of the target crude oil sample and the maximum gas production. The formula for determining the natural gas generation potential of the target crude oil sample is the same as the formula for determining the natural gas generation potential of the target kerogen, which is:

[0054]

[0055] Wherein, the sum of the hydrocarbon gas component contents may refer to the sum of the hydrocarbon gas component contents under different temperature conditions, and the maximum gas production may refer to selecting the maximum hydrocarbon gas component content from the sum of the hydrocarbon gas component contents under all temperature conditions as the maximum gas production. For example, as shown in Table 2, when determining the natural gas generation potential of the target crude oil sample when the equivalent vitrinite reflectance EasyR0=0.57, the sum of the hydrocarbon gas component contents when EasyR0=0.57 is determined to be 0.29 ml / g, and the maximum gas production is 536.33 ml / g, then the natural gas generation potential of the target crude oil sample when EasyR0=0.57 is:

[0056]

[0057] Table 2 Hydrocarbon gas component content of target crude oil samples

[0058]

[0059] S120, determining the adamantane yield of the target sample under different temperature conditions, and determining the adamantane index of the target sample under different temperature conditions based on the adamantane yield.

[0060] Among them, adamantane may refer to an experimental product obtained when a thermal simulation experiment is performed on a target sample. Adamantane is obtained from the experimental product, and the adamantane yield of the target sample under different temperature conditions is determined; and the adamantane index of the target sample under different temperature conditions is determined based on the adamantane yield. A larger parameter of the adamantane index indicates more thorough thermal cracking, and the amount of gas generated by the target sample will also increase accordingly.

[0061] As an optional but non-limiting implementation, the step of determining the adamantane yield of the target sample under different temperature conditions, and determining the adamantane index of the target sample under different temperature conditions based on the adamantane yield, includes but is not limited to steps C1-C3:

[0062] Step C1: obtaining an experimental product obtained when a target sample is subjected to a thermal simulation experiment, and immersing the experimental product in a preset solution to obtain a fusion liquid.

[0063] Step C2: obtaining the supernatant of the fusion liquid for quantitative analysis to respectively determine the yields of at least two adamantane compounds contained in the experimental product.

[0064] Step C3: determining the adamantane index of the target sample under different temperature conditions according to the yields of the at least two adamantane compounds.

[0065] Among them, the experimental product obtained when the target sample is subjected to a thermal simulation experiment is obtained; the experimental product is immersed in an isooctane solution to which an internal standard is added, and is allowed to stand for 12 hours after ultrasonic treatment; the supernatant is taken for GC-MS-MS quantitative analysis to calculate the yield of adamantane compounds. The yield of adamantane compounds is the ratio of the absolute amount of adamantane (ug) to the corresponding amount of sample loaded (g). Among them, the yield of adamantane compounds of the target sample is shown in Table 3 and Table 4.

[0066] After determining the yield of the adamantane compound of the target sample, the adamantane index of the target sample is determined. In the embodiment of the present invention, the trimethyl monoadamantane index is determined as an example. The trimethyl monoadamantane index calculation formula is:

[0067]

[0068] Among them, TMAI-1 is trimethyl monoadamantane index, and adamantane compounds include but are not limited to 1,3,5-TMA, 1,3,5-TMA cis and 1,3,5-TMA trans .

[0069] In an optional scheme of the embodiment of the present invention, the evolution characteristics of the adamantane maturity parameters during the thermal evolution of marine source rocks and coal-bearing mudstones are compared. The results show that the evolution characteristics of TMAI-1 (trimethylmonoadamantane index) in marine shale and coal-bearing mudstone are similar, and have a good linear relationship (R2=0.8496) with the equivalent vitrinite reflectance (EasyRo, %) calculated by the simulation experiment (e.g. Figure 2 At the same time, the vitrinite reflectance (Ro) in coal-bearing mudstone can be used to establish a relationship with EasyRo to realize the calculation of the maturity (Ro) of marine shale samples by the adamantane maturity parameter (e.g. Figure 3)。

[0070] Table 3 Yields of Adamantane Compounds in the Target Kerogen

[0071]

[0072] Table 4 Schematic Table of Yields of Adamantane Compounds in the Target Crude Oil Sample

[0073]

[0074] S130. Determine the fitting formula of the adamantane index - natural gas generation potential for the target sample based on the natural gas generation potential and the adamantane index.

[0075] Among them, after determining the natural gas generation potential of the target sample and the adamantane index, determine the fitting formula of the target sample based on the natural gas generation potential and the adamantane index. For example, taking the adamantane index TMAI - 1 as the abscissa and the natural gas generation potential as the ordinate, establish the fitting formula of the adamantane index - natural gas generation potential for the target sample.

[0076] As an optional but non - limiting implementation manner, the step of determining the fitting formula of the adamantane index - natural gas generation potential for the target sample based on the natural gas generation potential and the adamantane index includes, but is not limited to, steps D1 - D3:[[]]

[0077] Step D1: Determine at least two vitrinite reflectances of the kerogen sample of the target source rock under different temperature conditions.

[0078] Step D2: Group the natural gas generation potential and the adamantane index of the kerogen sample of the target source rock according to the at least two vitrinite reflectances.

[0079] Step D3: Determine the fitting formula of the adamantane index - natural gas generation potential for the kerogen sample of the target source rock under different groups according to the natural gas generation potential and the adamantane index of the kerogen sample of the target source rock.

[0080] Among them, determine the vitrinite reflectance of the kerogen sample of the target source rock under different temperature conditions, group the kerogen sample of the target source rock through the vitrinite reflectance, so as to determine the fitting formula of the adamantane index - natural gas generation potential for the kerogen sample of the target source rock under different thermal evolution degrees. The size of the vitrinite reflectance characterizes the maturity of the target sample. For example, when R0 < 2%, the target sample is in the low - maturity stage; when 2% < R0, the target sample is in the high - maturity stage.

[0081] In an optional solution of the embodiment of the present invention, the natural gas generation potential of the kerogen sample of the target hydrocarbon source rock is used as the ordinate and the adamantane index is used as the abscissa to establish a fitting formula for the kerogen sample of the target hydrocarbon source rock:

[0082] When R0=1.0~2.0%, y=-121.38x+80.048, R 2 =0.7343;

[0083] When R0=2.0~2.5%, y=-20.325x+41.191, R 2 =0.5994.

[0084] In the embodiment of the present invention, when determining the adamantane index-natural gas generation potential fitting formula of the kerogen sample of the target source rock, according to Figure 4 The scatter plots shown determine the fitting formulas for the kerogen samples of the two target source rocks at the low-maturity stage and the high-maturity stage, respectively.

[0085] As an optional but non-limiting implementation, the determination of the adamantane index-natural gas generation potential fitting formula of the target sample based on the natural gas generation potential and the adamantane index also includes but is not limited to steps E1-E3:

[0086] Step E1: Determine at least two equivalent vitrinite reflectances of the target crude oil sample under different temperature conditions.

[0087] Step E2: grouping the natural gas generation potential and the adamantane index of the target crude oil sample according to the at least two equivalent vitrinite reflectances.

[0088] Step E3: According to the natural gas generation potential and the adamantane index of the target crude oil sample, the adamantane index-natural gas generation potential fitting formula of the target crude oil sample in different groups is determined.

[0089] Among them, the vitrinite reflectance of the kerogen samples of the target crude oil samples under different temperature conditions is determined, and the target crude oil samples of the target source rock are grouped by the equivalent vitrinite reflectance to determine the adamantane index-natural gas generation potential fitting formula of the target crude oil samples under different thermal evolution degrees. Figure 5 As shown in the figure, the natural gas generation potential of the target crude oil sample is taken as the ordinate and the adamantane index is taken as the abscissa, and the fitting formula of the target crude oil sample is established:

[0090] When EasyR0=0.5~2.0%, y=-1366.9x+411.14, R 2 =0.6167;

[0091] When EasyR0=2.0~3.0%, y=-44.327x+47.565, R 2 =0.9582.

[0092] S140, determining a target adamantane index of the sample to be evaluated, and determining the natural gas generation potential of the sample to be evaluated according to the adamantane index-natural gas generation potential fitting formula and the target adamantane index.

[0093] Among them, after determining the diamond index-natural gas generation potential fitting formula of the target sample, the natural gas generation potential of other samples in the adjacent area of ​​the target sample can be determined based on the diamond index-natural gas generation potential fitting formula. For example, determine the crude oil sample to be evaluated in the well adjacent to the target crude oil sample; determine the diamond index of the crude oil sample to be evaluated, and determine the natural gas generation potential of the crude oil sample to be evaluated based on the diamond index-natural gas generation potential fitting formula of the target crude oil sample.

[0094] As an optional but non-limiting implementation, the determination of the target adamantane index of the sample to be evaluated, and the determination of the natural gas generation potential of the sample to be evaluated according to the adamantane index-natural gas generation potential fitting formula and the target adamantane index include but are not limited to steps F1-F3:

[0095] Step F1: Determine the equivalent vitrinite reflectance or vitrinite reflectance of the sample to be evaluated.

[0096] Step F2: determining a target adamantane index-natural gas generation potential fitting formula according to the equivalent vitrinite reflectance.

[0097] Step F3: Determine the natural gas generation potential of the sample to be evaluated based on the target adamantane index-natural gas generation potential fitting formula and the target adamantane index.

[0098] In an optional scheme of the embodiment of the present invention, since the target diamond index-natural gas generation potential fitting formula required for different maturity of the sample to be evaluated is different, it is also necessary to determine the equivalent vitrinite reflectance or vitrinite reflectance of the sample to be evaluated. For example, if the sample to be evaluated is a kerogen sample to be evaluated, the vitrinite reflectance of the kerogen sample to be evaluated is determined; the required first diamond index-natural gas generation potential fitting formula is determined based on the vitrinite reflectance of the kerogen sample to be evaluated; the natural gas generation potential of the kerogen sample to be evaluated is determined based on the first diamond index-natural gas generation potential fitting formula and the target diamond index of the kerogen sample to be evaluated. If the sample to be evaluated is a crude oil sample to be evaluated, the equivalent vitrinite reflectance of the crude oil sample to be evaluated is determined; the required second diamond index-natural gas generation potential fitting formula is determined based on the equivalent vitrinite reflectance of the crude oil sample to be evaluated; the natural gas generation potential of the crude oil sample to be evaluated is determined based on the second diamond index-natural gas generation potential fitting formula and the target diamond index of the crude oil sample to be evaluated.

[0099] The embodiment of the present invention provides a method for determining natural gas generation potential, by determining the hydrocarbon gas component content of the target sample under different temperature conditions, and determining the natural gas generation potential of the target sample under different temperature conditions according to the hydrocarbon gas component content; the target sample includes a kerogen sample of a target source rock and a target crude oil sample; determining the adamantane yield of the target sample under different temperature conditions, and determining the adamantane index of the target sample under different temperature conditions according to the adamantane yield; determining the adamantane index-natural gas generation potential fitting formula of the target sample according to the natural gas generation potential and the adamantane index; determining the target adamantane index of the sample to be evaluated, and determining the natural gas generation potential of the sample to be evaluated according to the adamantane index-natural gas generation potential fitting formula and the target adamantane index. Using the technical solution of the embodiment of the present invention, a thermal simulation experiment is performed on the source rock or crude oil sample, and the gas components and the yield of adamantane compounds under different temperature conditions are determined. By calculating the trimethylmonoadamantane index, a fitting formula of adamantane parameters and natural gas generation potential of different samples is obtained, which can be extended to the evaluation of natural gas generation potential of adjacent wells or adjacent areas. Based on the quantitative analysis and parameter evaluation of adamantane compounds, a fitting relationship between the adamantane index and the natural gas generation potential was established using thermal simulation experiments, which solved the difficult problem of predicting the natural gas generation potential in the high-overmature stage of deep layers, provided an important reference basis for oil and gas exploration and development, and has very good application prospects.

[0100] Figure 6: is a schematic diagram of a natural gas generation potential determination device provided in an embodiment of the present invention. The technical solution of this embodiment can be applied to the case of determining the generation potential of high-overmature natural gas. The device can be implemented by software and / or hardware and is generally integrated on any electronic device with network communication function, including but not limited to: servers, computers, personal digital assistants and other devices. Figure 6 As shown, the natural gas generation potential determination device provided in this embodiment may include: a gas component content determination module 610, a diamond index determination module 620, a fitting formula determination module 630 and a natural gas generation potential determination module 640; wherein,

[0101] The gas component content determination module 610 is used to determine the hydrocarbon gas component content of the target sample under different temperature conditions, and determine the natural gas generation potential of the target sample under different temperature conditions based on the hydrocarbon gas component content; the target sample includes a kerogen sample of a target hydrocarbon source rock and a target crude oil sample;

[0102] an adamantane index determination module 620, for determining the adamantane yield of the target sample under different temperature conditions, and determining the adamantane index of the target sample under different temperature conditions according to the adamantane yield;

[0103] A fitting formula determination module 630 is used to determine the adamantane index-natural gas generation potential fitting formula of the target sample according to the natural gas generation potential and the adamantane index;

[0104] The natural gas generation potential determination module 640 is used to determine the target adamantane index of the sample to be evaluated, and determine the natural gas generation potential of the sample to be evaluated based on the adamantane index-natural gas generation potential fitting formula and the target adamantane index.

[0105] Based on the above embodiment, optionally, the gas component content determination module includes:

[0106] Pre-treating the target source rock sample to obtain the target kerogen;

[0107] Dividing the target kerogen into at least two groups of kerogen samples, subjecting the at least two groups of kerogen samples to thermal simulation experiments under different temperature conditions, respectively, and determining the contents of at least two hydrocarbon gas components of the at least two groups of kerogen samples under different temperature conditions;

[0108] Based on the contents of the at least two hydrocarbon gas components, the natural gas generation potential of the at least two groups of kerogen samples under different temperature conditions is determined.

[0109] Based on the above embodiment, optionally, the gas component content determination module further includes:

[0110] Dividing the target crude oil sample into at least two groups of crude oil samples, performing thermal simulation experiments on the at least two groups of crude oil samples under different temperature conditions, respectively, and determining the contents of at least two hydrocarbon gas components of the at least two groups of crude oil samples under different temperature conditions;

[0111] The natural gas generation potentials of the at least two groups of crude oil samples under different temperature conditions are determined respectively according to the contents of the at least two hydrocarbon gas components.

[0112] Based on the above embodiment, optionally, the adamantane index determination module includes:

[0113] Obtaining an experimental product obtained when a target sample is subjected to a thermal simulation experiment, and immersing the experimental product in a preset solution to obtain a fusion liquid;

[0114] Obtaining the supernatant of the fusion liquid for quantitative analysis to respectively determine the yields of at least two adamantane compounds contained in the experimental product;

[0115] The adamantane index of the target sample under different temperature conditions is determined according to the yields of the at least two adamantane compounds.

[0116] Based on the above embodiment, optionally, the fitting formula determination module includes:

[0117] Determine at least two vitrinite reflectances of kerogen samples of target source rocks under different temperature conditions;

[0118] grouping the natural gas generation potential and the adamantane index of the kerogen sample of the target source rock according to the at least two vitrinite reflectances;

[0119] According to the natural gas generation potential and the adamantane index of the kerogen samples of the target source rocks, the adamantane index-natural gas generation potential fitting formula of the kerogen samples of the target source rocks in different groups is determined.

[0120] Based on the above embodiment, optionally, the fitting formula determination module further includes:

[0121] Determine at least two equivalent vitrinite reflectances of the target crude oil sample under different temperature conditions;

[0122] grouping the natural gas generation potential and the adamantane index of the target crude oil sample according to the at least two equivalent vitrinite reflectances;

[0123] According to the natural gas generation potential and the adamantane index of the target crude oil samples, the adamantane index-natural gas generation potential fitting formula of the target crude oil samples under different groups is determined.

[0124] Based on the above embodiment, optionally, the natural gas generation potential determination module includes:

[0125] Determine the equivalent vitrinite reflectance or vitrinite reflectance of the sample to be evaluated;

[0126] Determining a target adamantane index-natural gas generation potential fitting formula according to the equivalent vitrinite reflectance;

[0127] The natural gas generation potential of the sample to be evaluated is determined based on the target diamond index-natural gas generation potential fitting formula and the target diamond index.

[0128] The natural gas generation potential determination device provided in the embodiment of the present invention can execute the natural gas generation potential determination method provided in any of the above-mentioned embodiments of the present invention, and has the corresponding functions and beneficial effects of executing the natural gas generation potential determination method. For detailed process, please refer to the relevant operations of the natural gas generation potential determination method in the above-mentioned embodiment.

[0129] Figure 7 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. The electronic device 10 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0130] like Figure 7 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0131] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0132] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a method for determining natural gas generation potential.

[0133] In some embodiments, the natural gas generation potential determination method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the natural gas generation potential determination method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the natural gas generation potential determination method in any other appropriate manner (e.g., by means of firmware).

[0134] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0135] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0136] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0137] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0138] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0139] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0140] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0141] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining natural gas generation potential, characterized in that: The method comprises: Determine the hydrocarbon gas component content of the target sample under different temperature conditions, and determine the natural gas generation potential of the target sample under different temperature conditions based on the hydrocarbon gas component content; the target sample includes a kerogen sample of a target hydrocarbon source rock and a target crude oil sample; Determining the adamantane yield of the target sample under different temperature conditions, and determining the adamantane index of the target sample under different temperature conditions based on the adamantane yield; According to the natural gas generation potential and the adamantane index, the adamantane index-natural gas generation potential fitting formula of the target sample is determined; The target adamantane index of the sample to be evaluated is determined, and the natural gas generation potential of the sample to be evaluated is determined based on the adamantane index-natural gas generation potential fitting formula and the target adamantane index.

2. The method according to claim 1, characterized in that The determining of the hydrocarbon gas component content of the target sample under different temperature conditions, and determining the natural gas generation potential of the target sample under different temperature conditions based on the hydrocarbon gas component content, includes: Pre-treating the target source rock sample to obtain the target kerogen; Dividing the target kerogen into at least two groups of kerogen samples, subjecting the at least two groups of kerogen samples to thermal simulation experiments under different temperature conditions, respectively, and determining the contents of at least two hydrocarbon gas components of the at least two groups of kerogen samples under different temperature conditions; Based on the contents of the at least two hydrocarbon gas components, the natural gas generation potential of the at least two groups of kerogen samples under different temperature conditions is determined.

3. The method according to claim 1, characterized in that The determining of the hydrocarbon gas component content of the target sample under different temperature conditions, and determining the natural gas generation potential of the target sample under different temperature conditions based on the hydrocarbon gas component content, further includes: Dividing the target crude oil sample into at least two groups of crude oil samples, performing thermal simulation experiments on the at least two groups of crude oil samples under different temperature conditions, respectively, and determining the contents of at least two hydrocarbon gas components of the at least two groups of crude oil samples under different temperature conditions; The natural gas generation potentials of the at least two groups of crude oil samples under different temperature conditions are determined respectively according to the contents of the at least two hydrocarbon gas components.

4. The method according to claim 2, characterized in that: The step of determining the adamantane yield of the target sample under different temperature conditions, and determining the adamantane index of the target sample under different temperature conditions according to the adamantane yield, comprises: Obtaining an experimental product obtained when a target sample is subjected to a thermal simulation experiment, and immersing the experimental product in a preset solution to obtain a fusion liquid; Obtaining the supernatant of the fusion liquid for quantitative analysis to respectively determine the yields of at least two adamantane compounds contained in the experimental product; The adamantane index of the target sample under different temperature conditions is determined according to the yields of the at least two adamantane compounds.

5. The method according to claim 1, characterized in that The method of determining the adamantane index-natural gas generation potential fitting formula of the target sample based on the natural gas generation potential and the adamantane index comprises: Determine at least two vitrinite reflectances of kerogen samples of target source rocks under different temperature conditions; grouping the natural gas generation potential and the adamantane index of the kerogen sample of the target source rock according to the at least two vitrinite reflectances; According to the natural gas generation potential and the adamantane index of the kerogen samples of the target source rocks, the adamantane index-natural gas generation potential fitting formula of the kerogen samples of the target source rocks in different groups is determined.

6. The method according to claim 1, characterized in that The step of determining the adamantane index-natural gas generation potential fitting formula of the target sample based on the natural gas generation potential and the adamantane index also includes: Determine at least two equivalent vitrinite reflectances of the target crude oil sample under different temperature conditions; grouping the natural gas generation potential and the adamantane index of the target crude oil sample according to the at least two equivalent vitrinite reflectances; According to the natural gas generation potential and the adamantane index of the target crude oil samples, the adamantane index-natural gas generation potential fitting formula of the target crude oil samples under different groups is determined.

7. The method according to claim 6, characterized in that The step of determining a target adamantane index of the sample to be evaluated, and determining the natural gas generation potential of the sample to be evaluated according to the adamantane index-natural gas generation potential fitting formula and the target adamantane index, comprises: Determine the equivalent vitrinite reflectance or vitrinite reflectance of the sample to be evaluated; Determining a target adamantane index-natural gas generation potential fitting formula according to the equivalent vitrinite reflectance; The natural gas generation potential of the sample to be evaluated is determined based on the target diamond index-natural gas generation potential fitting formula and the target diamond index.

8. A device for determining natural gas generation potential, characterized in that: The device comprises: A gas component content determination module is used to determine the hydrocarbon gas component content of a target sample under different temperature conditions, and determine the natural gas generation potential of the target sample under different temperature conditions based on the hydrocarbon gas component content; the target sample includes a kerogen sample of a target hydrocarbon source rock and a target crude oil sample; an adamantane index determination module, for determining the adamantane yield of the target sample under different temperature conditions, and determining the adamantane index of the target sample under different temperature conditions according to the adamantane yield; A fitting formula determination module is used to determine the adamantane index-natural gas generation potential fitting formula of the target sample based on the natural gas generation potential and the adamantane index; The natural gas generation potential determination module is used to determine the target adamantane index of the sample to be evaluated, and determine the natural gas generation potential of the sample to be evaluated based on the adamantane index-natural gas generation potential fitting formula and the target adamantane index.

9. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method for determining the natural gas generation potential as described in any one of claims 1-7.

10. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions are used to perform the natural gas production potential determination method as described in any one of claims 1-7 when executed by a computer processor.

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