Method, device, equipment and medium for determining effective thickness of hydrocarbon source rock

Abstract

The present invention discloses a method, device, electronic device and medium for determining the effective thickness of hydrocarbon source rocks. The method comprises: respectively obtaining the measured effective thickness, lithological effective thickness and well logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in known areas; establishing a fitting relationship between the measured effective thickness and the well logging effective thickness; and calculating the measured effective thickness of hydrocarbon source rock samples in heterogeneous formations in unknown areas based on the fitting relationship between the measured effective thickness and the well logging effective thickness and the well logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in unknown areas. The present invention establishes a fitting relationship between the measured effective thickness and the well logging effective thickness based on the measured effective thickness, lithological effective thickness and well logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in known areas, and then calculates the measured effective thickness of hydrocarbon source rock samples in heterogeneous formations in unknown areas, thereby realizing accurate calculation of the effective thickness of hydrocarbon source rocks in heterogeneous formations.

Description

Technical Field

[0001] The invention belongs to the field of petroleum exploration and development, and specifically relates to a method, a device, an electronic device and a medium for determining the effective thickness of hydrocarbon source rocks in heterogeneous strata. Background Art

[0002] The effective thickness is also called the pure production layer, or the effective layer thickness. It refers to the thickness of the oil layer in the reservoir that has the capacity to produce industrial oil, that is, the thickness of the reservoir with movable oil in the industrial oil well.

[0003] In the process of calculating the geological resources of oil and gas using the genetic method, the effective thickness of the source rock in a certain stratigraphic unit is an important basic parameter. For the lower limit of the organic matter abundance (Toc) of carbonate source rocks, it is generally recognized that the formation of large-scale industrial oil and gas reservoirs must meet the Toc greater than 0.5% (Zhong Ningning, 2009, Liang Digang, 2000), that is, Toc greater than 0.5% is an effective source rock. After determining the Toc abundance lower limit, for conventional layered and homogeneous formations, the effective thickness of the source rock, mud-to-ground ratio and other parameters can be simply and directly obtained through the measured Toc data, and then the geological resources are calculated by the genetic method.

[0004] However, this method has the following defects: (1) In heterogeneous strata, source rocks are distributed in non-layered form, which is different from the conventional layered sandstone and mudstone lithology combination. When using the traditional method to determine the thickness of effective source rocks, in the nodular limestone, the eyeball part is elliptical and interacts with the eyelid part in three-dimensional space, which is not layered and orderly distributed. The Toc (organic carbon) test data obtained from the drilling core cannot be directly used to characterize the effective thickness of the source rock; (2) The amount of geological resource calculation is large and a lot of geological resources are required.

[0005] In summary, it is difficult to determine the effective thickness of source rocks in heterogeneous formations using traditional methods, which makes it difficult to calculate resource quantities. Therefore, it is particularly necessary to propose a method that can accurately calculate the effective thickness of source rocks in heterogeneous formations. Summary of the invention

[0006] The purpose of the present invention is to provide a determination method, device, electronic equipment and medium that can accurately calculate the effective thickness of hydrocarbon source rocks in non-mean formations.

[0007] In a first aspect, the present invention provides a method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations, comprising: respectively obtaining the measured effective thickness, lithological effective thickness and logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in a known area; establishing a fitting relationship between the measured effective thickness and the logging effective thickness based on the measured effective thickness, lithological effective thickness and logging effective thickness; calculating the measured effective thickness of hydrocarbon source rock samples in heterogeneous formations in an unknown area based on the fitting relationship between the measured effective thickness and the logging effective thickness and the logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in an unknown area.

[0008] Optionally, the lithological effective thickness includes a maximum lithological effective thickness and a minimum lithological effective thickness. When the measured effective thickness is less than or equal to the maximum lithological effective thickness and greater than or equal to the minimum lithological effective thickness, a fitting relationship between the measured effective thickness and the logging effective thickness is established.

[0009] Optionally, the fitting relationship between the measured effective thickness and the well logging effective thickness is:

[0010] h 实测 =k×h 测井

[0011] Among them, h 实测 is the measured effective thickness, k is the coefficient, h 测井 is the effective logging thickness.

[0012] Optionally, the measured effective thickness of hydrocarbon source rock samples in heterogeneous formations in a known area is obtained through actual measurement; and the lithological effective thickness of hydrocarbon source rock samples in heterogeneous formations in a known area is obtained through core measurement.

[0013] Optionally, the maximum value and the minimum value of the lithology effective thickness are measured respectively by random measurement method and eyelid measurement method.

[0014] Optionally, the Toc content of the heterogeneous formation source rock sample in the known area is greater than a first threshold value.

[0015] Optionally, the logging effective thickness of the heterogeneous formation source rock samples in a known area is obtained by a logging method.

[0016] In a second aspect, the present invention further provides an electronic device, comprising: a memory storing executable instructions; and a processor, wherein the processor runs the executable instructions in the memory to implement the above-mentioned method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations.

[0017] In a third aspect, the present invention further provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations.

[0018] In a fourth aspect, the present invention also provides a device for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations, comprising: an acquisition module, for respectively acquiring the measured effective thickness, lithological effective thickness and logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in a known area; a fitting relationship establishment module, for establishing a fitting relationship between the measured effective thickness and the logging effective thickness based on the measured effective thickness, lithological effective thickness and logging effective thickness of hydrocarbon source rock samples in the known area; and a measured effective thickness calculation module, for calculating the measured effective thickness of hydrocarbon source rock samples in heterogeneous formations in an unknown area based on the fitting relationship between the measured effective thickness and the logging effective thickness and the logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in an unknown area.

[0019] Optionally, the lithological effective thickness includes a maximum lithological effective thickness and a minimum lithological effective thickness. When the measured effective thickness is less than or equal to the maximum lithological effective thickness and greater than or equal to the minimum lithological effective thickness, a fitting relationship between the measured effective thickness and the logging effective thickness is established.

[0020] Optionally, the fitting relationship between the measured effective thickness and the well logging effective thickness is:

[0021] h 实测 =k×h 测井

[0022] Among them, h 实测 is the measured effective thickness, k is the coefficient, h 测井 is the effective logging thickness.

[0023] Optionally, the measured effective thickness of hydrocarbon source rock samples in heterogeneous formations in a known area is obtained through actual measurement; and the lithological effective thickness of hydrocarbon source rock samples in heterogeneous formations in a known area is obtained through core measurement.

[0024] Optionally, the effective thickness of the lithology is measured by random measurement method and eyelid measurement method respectively.

[0025] Optionally, the Toc content of the heterogeneous formation source rock sample in the known area is greater than a first threshold value.

[0026] Optionally, the logging effective thickness of the heterogeneous formation source rock samples in a known area is obtained by a logging method.

[0027] The beneficial effect of the present invention is that the method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations of the present invention is based on the measured effective thickness, lithological effective thickness and logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in known areas, establishes a fitting relationship between the measured effective thickness and the logging effective thickness, and then calculates the measured effective thickness of hydrocarbon source rock samples in heterogeneous formations in unknown areas, thereby realizing accurate calculation of the effective thickness of hydrocarbon source rocks in heterogeneous formations.

[0028] The present invention has other features and advantages, which will be apparent from or will be described in detail in the accompanying drawings and the following specific embodiments incorporated herein, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0030] Figure 1 A flow chart of a method for determining the effective thickness of hydrocarbon source rocks in a heterogeneous formation according to an embodiment of the present invention is shown.

[0031] Figure 2 A schematic diagram of a simple geometric model of nodular limestone is shown.

[0032] Figure 3 A diagram showing the lithological characteristics of nodular limestone is shown.

[0033] Figure 4 A Toc distribution contour map of the lower section of Maoling area is shown, showing a method for determining the effective thickness of source rocks in heterogeneous formations according to an embodiment of the present invention.

[0034] Figure 5 A block diagram of a device for determining the effective thickness of hydrocarbon source rocks in a heterogeneous formation according to an embodiment of the present invention is shown.

[0035] Description of Reference Numerals

[0036] 102, acquisition module; 104, fitting relationship establishment module; 106, measured effective thickness calculation module. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0038] The present invention provides a method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations, comprising: respectively obtaining the measured effective thickness, lithological effective thickness and well logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in known areas; establishing a fitting relationship between the measured effective thickness and the well logging effective thickness based on the measured effective thickness, lithological effective thickness and well logging effective thickness; and calculating the measured effective thickness of hydrocarbon source rock samples in heterogeneous formations in unknown areas based on the fitting relationship between the measured effective thickness and the well logging effective thickness and the well logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in unknown areas.

[0039] Specifically, when the measured effective thickness of the hydrocarbon source rock sample in the heterogeneous formation in the known area is within the interval of the lithological effective thickness, a fitting relationship between the measured effective thickness and the well logging effective thickness is established, and the well logging effective thickness of the hydrocarbon source rock sample in the heterogeneous formation in the unknown area is substituted into the fitting relationship between the measured effective thickness and the well logging effective thickness to obtain the measured effective thickness of the hydrocarbon source rock sample in the heterogeneous formation in the unknown area.

[0040] As an optional scheme, the lithological effective thickness includes the maximum lithological effective thickness and the minimum lithological effective thickness. When the measured effective thickness is less than or equal to the maximum lithological effective thickness and greater than or equal to the minimum lithological effective thickness, a fitting relationship between the measured effective thickness and the logging effective thickness is established.

[0041] Specifically, the effective thickness measured randomly may be the maximum value of the lithological effective thickness, and the effective thickness measured by eye may be the minimum value of the lithological effective thickness. When the measured effective thickness is within the maximum and minimum value interval of the lithological effective thickness, it means that the measured effective thickness is within a reasonable range and is representative. Therefore, a fitting relationship between the measured effective thickness and the logging effective thickness is established.

[0042] As an optional solution, the fitting relationship between the measured effective thickness and the well logging effective thickness is:

[0043] h 实测 =k×h 测井

[0044] Among them, h 实测 is the measured effective thickness, k is the coefficient, h 测井 is the effective logging thickness.

[0045] Specifically, the logging effective thickness of the formation section not measured is substituted into the fitting relationship between the measured effective thickness and the logging effective thickness to obtain the measured effective thickness of the formation section not measured.

[0046] As an optional solution, the measured effective thickness of the hydrocarbon source rock samples in the heterogeneous formations in the known area is obtained through actual measurement; the lithological effective thickness of the hydrocarbon source rock samples in the heterogeneous formations in the known area is obtained through core measurement.

[0047] As an alternative, the maximum value and the minimum value of the lithology effective thickness are measured by random measurement method and eyelid measurement method respectively.

[0048] Specifically, the mud-to-ground ratio-effective thickness is determined by two methods: random measurement and eyeball measurement. The random measurement method measures the maximum effective thickness of the rock type, and the eyeball measurement method measures the minimum effective thickness of the rock type.

[0049] As an alternative, the Toc content of a hydrocarbon source rock sample from a heterogeneous formation in a known area is greater than a first threshold.

[0050] Specifically, the logging parameters related to Toc are used to fit the distribution curve, and the measured effective thickness, lithology effective thickness and logging effective thickness of the heterogeneous formation source rock samples of the effective section formation with Toc greater than 0.5% are taken.

[0051] As an optional solution, the logging effective thickness of the heterogeneous formation source rock samples in a known area is obtained by the well logging method.

[0052] Specifically, there are many methods for obtaining the effective thickness of source rocks using well logging methods, including the △LgR method, the multi-parameter fitting method, and so on.

[0053] The present invention also provides an electronic device, which includes: a memory storing executable instructions; and a processor running the executable instructions in the memory to implement the above-mentioned method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations.

[0054] The present invention also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations is implemented.

[0055] The present invention also provides a device for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations, comprising: an acquisition module, for respectively acquiring the measured effective thickness, lithological effective thickness and well logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in known areas; a fitting relationship establishment module, for establishing a fitting relationship between the measured effective thickness and the well logging effective thickness based on the measured effective thickness, lithological effective thickness and well logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in known areas; and a measured effective thickness calculation module, for calculating the measured effective thickness of hydrocarbon source rock samples in heterogeneous formations in unknown areas based on the fitting relationship between the measured effective thickness and the well logging effective thickness and the well logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in unknown areas.

[0056] Specifically, when the measured effective thickness of the hydrocarbon source rock sample in the heterogeneous formation in the known area is within the interval of the lithological effective thickness, a fitting relationship between the measured effective thickness and the well logging effective thickness is established, and the well logging effective thickness of the hydrocarbon source rock sample in the heterogeneous formation in the unknown area is substituted into the fitting relationship between the measured effective thickness and the well logging effective thickness to obtain the measured effective thickness of the hydrocarbon source rock sample in the heterogeneous formation in the unknown area.

[0057] As an optional scheme, the lithological effective thickness includes the maximum lithological effective thickness and the minimum lithological effective thickness. When the measured effective thickness is less than or equal to the maximum lithological effective thickness and greater than or equal to the minimum lithological effective thickness, a fitting relationship between the measured effective thickness and the logging effective thickness is established.

[0058] Specifically, the effective thickness measured randomly may be the maximum effective thickness of the lithology, and the effective thickness measured by eye may be the minimum effective thickness of the lithology. When the measured effective thickness is within the maximum and minimum range of the lithology effective thickness, it means that the measured effective thickness is within a reasonable range and is representative. Therefore, a fitting relationship between the measured effective thickness and the logging effective thickness is established.

[0059] As an optional solution, the fitting relationship between the measured effective thickness and the well logging effective thickness is:

[0060] h 实测 =k×h 测井

[0061] Among them, h 实测 is the measured effective thickness, k is the coefficient, h 测井 is the effective logging thickness.

[0062] Specifically, the logging effective thickness of the formation section not measured is substituted into the fitting relationship between the measured effective thickness and the logging effective thickness to obtain the measured effective thickness of the formation section not measured.

[0063] As an optional solution, the measured effective thickness of the hydrocarbon source rock samples in the heterogeneous formations in the known area is obtained through actual measurement; the lithological effective thickness of the hydrocarbon source rock samples in the heterogeneous formations in the known area is obtained through core measurement.

[0064] As an alternative, the maximum value and the minimum value of the lithology effective thickness are measured by random measurement method and eyelid measurement method respectively.

[0065] Specifically, the mud-to-ground ratio-effective thickness is determined by two methods: random measurement and eyeball measurement. The random measurement method measures the maximum effective thickness of the rock type, and the eyeball measurement method measures the minimum effective thickness of the rock type.

[0066] As an alternative, the Toc content of a hydrocarbon source rock sample from a heterogeneous formation in a known area is greater than a first threshold.

[0067] Specifically, the logging parameters related to Toc are used to fit the distribution curve, and the measured effective thickness, lithology effective thickness and logging effective thickness of the heterogeneous formation source rock samples of the effective section formation with Toc greater than 0.5% are taken.

[0068] As an optional solution, the logging effective thickness of the heterogeneous formation source rock samples in a known area is obtained by the well logging method.

[0069] Specifically, there are many methods for obtaining the effective thickness of source rocks using well logging methods, including the △LgR method, the multi-parameter fitting method, and so on.

[0070] Embodiment 1

[0071] Figure 1 A flow chart of a method for determining the effective thickness of hydrocarbon source rocks in a heterogeneous formation according to an embodiment of the present invention is shown. Figure 2 A schematic diagram of a simple geometric model of nodular limestone is shown.

[0072] Figure 3 A diagram showing the lithological characteristics of nodular limestone is shown. Figure 4 A Toc distribution contour map of the lower section of Maoling area is shown, showing a method for determining the effective thickness of source rocks in heterogeneous formations according to an embodiment of the present invention.

[0073] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the method for determining the effective thickness of the heterogeneous formation source rock includes:

[0074] Step 1: respectively obtain the measured effective thickness, lithological effective thickness and logging effective thickness of the heterogeneous formation source rock samples in the known area;

[0075] Step 2: Based on the measured effective thickness, lithological effective thickness and well logging effective thickness, a fitting relationship between the measured effective thickness and the well logging effective thickness is established;

[0076] Step 3: Based on the fitting relationship between the measured effective thickness and the well logging effective thickness and the well logging effective thickness of the heterogeneous formation source rock sample in the unknown area, calculate the measured effective thickness of the heterogeneous formation source rock sample in the unknown area.

[0077] Among them, the lithological effective thickness includes the maximum lithological effective thickness and the minimum lithological effective thickness. When the measured effective thickness is less than or equal to the maximum lithological effective thickness and greater than or equal to the minimum lithological effective thickness, a fitting relationship between the measured effective thickness and the logging effective thickness is established.

[0078] Among them, the fitting relationship between the measured effective thickness and the well logging effective thickness is:

[0079] h 实测 =k×h 测井

[0080] Among them, h 实测 is the measured effective thickness, k is the coefficient, h 测井 is the effective logging thickness.

[0081] Among them, the measured effective thickness of the hydrocarbon source rock samples in the heterogeneous formations in the known area is obtained through actual measurement; and the lithological effective thickness of the hydrocarbon source rock samples in the heterogeneous formations in the known area is obtained through the core measurement method.

[0082] Among them, the maximum value and the minimum value of the effective thickness of the lithology are measured by random measurement method and eyelid measurement method respectively.

[0083] Among them, the Toc content of the heterogeneous formation source rock samples in the known area is greater than the first threshold.

[0084] Among them, the logging effective thickness of the heterogeneous formation source rock samples in the known area is obtained by the logging method.

[0085] Take the four wells in the study area as an example. The thickness of the nodular limestone formation in the lower section of Mao in Jiaoye 30-6 well is 49.35m, with 274 measured data points and a data point density of 5.95 points / m; the thickness of the nodular limestone formation in the lower section of Mao in Jiaoye 66-1 well is 51.78m, with 175 measured data points and a data point density of 3.36 points / m; the thickness of the nodular limestone formation in the lower section of Mao in Jiaoye 34-8 well is 45.44m, with 116 measured data points and a data point density of 2.57 points / m; the thickness of the nodular limestone formation in the lower section of Mao in Pingqiao 1 well is 41m, with 44 measured data points and a data point density of 1.0 points / m.

[0086] The mud-to-ground ratios obtained from the four wells were 59.4%, 65.8%, 74.3% and 70%, respectively, and the corresponding effective thicknesses of the source rocks were 29.31m, 34.07m, 33.76m and 28.7m, respectively.

[0087] Core measurements were conducted on the Jiaoye 30-6 well, and the mud-to-ground ratio-effective thickness was determined by random measurement and eyeball measurement. The mud-to-ground ratio obtained by random measurement was 64.5%, and the corresponding effective thickness of the source rock was 31.83m;

[0088] Through eyeball measurement, the sand-to-ground ratio was obtained to be 55.64%, the corresponding mud-to-ground ratio was 44.36%, and the effective thickness of the source rock was 21.89 m;

[0089] There are many fitting methods for obtaining Toc data using logging methods, including △LgR method, multi-parameter fitting method, etc. The U-Toc fitting method is used for logging evaluation in this area, and the mud-to-ground ratio of the nodular limestone formation in the lower section of Mao is 59.42%, and the corresponding effective thickness of the source rock is 29.32m.

[0090] Since the formation thickness of the lower Mao section of Well 30-6 is 49.35m and the sampling point density is 5.95 points / m, it basically meets the standard of systematic sampling, and the measured mud-to-ground ratio data is 59.4%. The mud-to-ground ratio data calculated by the logging curve fitting method is 88.3%. The mud-to-ground ratio measured by the core is 44.36% and 64.5%.

[0091] The eyeball measurement method in core measurement represents the maximum distribution of the eyeball, that is, the invalid source rock (55.64%), corresponding to the lower limit of the mud-land ratio, and the minimum mud-land ratio is about 44.36%. According to the field nodular limestone lithology model, the model is built as follows Figure 2 As shown, the eyeball is generally elliptical, with a long diameter of about 10cm and a short diameter of about 6cm. According to the volume formula,

[0092] The eyeball is calculated to account for about 52% of the rock volume. On this basis, the eyeball volume is calculated to be 44.36% × 52% ≈ 23%, and the eyelid mud-ground ratio is 77%. This is basically consistent with the ground ratio of 64.5% obtained by random rock measurement.

[0093] The mud-ground ratio obtained by logging fitting is 88.3%, which represents the maximum possible distribution value of the mud-ground ratio, because radioactive logging obtains the maximum cumulative volume and radioactivity intensity of all mudstones within 35-45 cm of the wellbore.

[0094] The measured data of Jiaoye 36-6 well is 59.4%. Because of the high density of data points, it basically reaches the density of system sampling and is representative.

[0095] Comprehensive analysis shows that the lower limit of the mud-ground ratio in the lower section of Maoxia in this area is 44.36%, and the upper limit is 70% (survey method) -88.3% (well logging method). The actual drilling test analysis data of the mud-ground ratio of 59.4% is within a reasonable range.

[0096] Therefore, the fitting relationship between the actual test data and the logging data is established, and the 59.4% of the system sampling is used as the average mud-ground ratio, the logging data 88.3% × K (mud-ground ratio recovery coefficient) = 59.4%, and the K value of 67.2% is used as the basis for determining the mud-ground ratio of other well points. The mud-ground ratio of other well points and the effective thickness of the source rock are also determined.

[0097] Calculate the gas-bearing area of ​​the lower section of the reef dam main area, 230km 2 The resource volume is 70.6 billion cubic meters. It is clear that the area is a shallow, large, medium-abundance, medium-to-low productivity transitional oil and gas reservoir.

[0098] like Figure 3 As shown, the lithological characteristics of the heterogeneous marlstone (nodular limestone) formation in Fuling area.

[0099] The part encircled by the dotted line is the eyeball structure, the lithology is mainly mudstone limestone, the Toc content is low, generally less than 0.2%, and it is distributed in three states: isolated, intermittent, and continuous; the dark part is the eyelid part, the lithology is mainly gray marl limestone, that is, it is mainly composed of mud, and the Toc content is high, generally between 0.8-1.2%. The comprehensive analysis table of the mud-land ratio of the lower section of Mao in Fuling area is shown in the following table. The measured effective thickness of Well 30-6 is greater than the minimum value of the lithology effective thickness and less than the maximum value of the lithology effective thickness, and the fitting relationship between the measured effective thickness and the well logging effective thickness is established. The well logging effective thickness of Well 66-1, Well 34-8 and Pingqiao 1 is obtained, and the well logging effective thickness is substituted into the fitting relationship between the measured effective thickness and the well logging effective thickness to obtain the measured effective thickness.

[0100]

[0101] Embodiment 2

[0102] Figure 5 A block diagram of a device for determining the effective thickness of hydrocarbon source rocks in a heterogeneous formation according to an embodiment of the present invention is shown.

[0103] like Figure 5 As shown, the device for determining the effective thickness of the heterogeneous formation source rock comprises:

[0104] An acquisition module 102 is used to respectively acquire the measured effective thickness, lithology effective thickness and logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in a known area;

[0105] A fitting relationship establishment module 104 is used to establish a fitting relationship between the measured effective thickness and the well logging effective thickness based on the measured effective thickness, lithology effective thickness and well logging effective thickness of the heterogeneous formation source rock samples in the known area;

[0106] The measured effective thickness calculation module 106 calculates the measured effective thickness of the heterogeneous formation source rock sample in the unknown area based on the fitting relationship between the measured effective thickness and the well logging effective thickness and the well logging effective thickness of the heterogeneous formation source rock sample in the unknown area.

[0107] Among them, the lithological effective thickness includes the maximum lithological effective thickness and the minimum lithological effective thickness. When the measured effective thickness is less than or equal to the maximum lithological effective thickness and greater than or equal to the minimum lithological effective thickness, a fitting relationship between the measured effective thickness and the logging effective thickness is established.

[0108] Among them, the fitting relationship between the measured effective thickness and the well logging effective thickness is:

[0109] h 实测 =k×h 测井

[0110] Among them, h 实测 is the measured effective thickness, k is the coefficient, h 测井 is the effective logging thickness.

[0111] Among them, the measured effective thickness of the hydrocarbon source rock samples in the heterogeneous formations in the known area is obtained through actual measurement; and the lithological effective thickness of the hydrocarbon source rock samples in the heterogeneous formations in the known area is obtained through the core measurement method.

[0112] Among them, the maximum value and the minimum value of the effective thickness of the lithology are measured by random measurement method and eyelid measurement method respectively.

[0113] Among them, the Toc content of the heterogeneous formation source rock samples in the known area is greater than the first threshold.

[0114] Among them, the logging effective thickness of the heterogeneous formation source rock samples in the known area is obtained by the logging method.

[0115] Embodiment 3

[0116] The present disclosure provides an electronic device, which includes: a memory storing executable instructions; a processor running the executable instructions in the memory to implement the above-mentioned method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations.

[0117] An electronic device according to an embodiment of the present disclosure includes a memory and a processor.

[0118] The memory is used to store non-temporary computer-readable instructions. Specifically, the memory may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may, for example, include random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may, for example, include read-only memory (ROM), hard disk, flash memory, etc.

[0119] The processor may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions. In one embodiment of the present disclosure, the processor is used to run the computer-readable instructions stored in the memory.

[0120] Those skilled in the art should be able to understand that in order to solve the technical problem of how to obtain a good user experience, the present embodiment may also include well-known structures such as a communication bus and an interface, and these well-known structures should also be included in the protection scope of the present disclosure.

[0121] For detailed description of this embodiment, reference may be made to the corresponding descriptions in the aforementioned embodiments, which will not be repeated here.

[0122] Embodiment 4

[0123] The present disclosure provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations.

[0124] According to the computer-readable storage medium of the embodiment of the present disclosure, non-transitory computer-readable instructions are stored thereon. When the non-transitory computer-readable instructions are executed by a processor, all or part of the steps of the above-mentioned methods of each embodiment of the present disclosure are executed.

[0125] The above-mentioned computer-readable storage media include, but are not limited to: optical storage media (e.g., CD-ROM and DVD), magneto-optical storage media (e.g., MO), magnetic storage media (e.g., magnetic tape or mobile hard disk), media with built-in rewritable non-volatile memory (e.g., memory card) and media with built-in ROM (e.g., ROM box).

[0126] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method for determining the effective thickness of source rocks in heterogeneous formations, characterized in that: include: Respectively obtain the measured effective thickness, lithology effective thickness and logging effective thickness of the heterogeneous formation source rock samples in the known area; Based on the measured effective thickness, lithological effective thickness and well logging effective thickness, a fitting relationship between the measured effective thickness and the well logging effective thickness is established; Calculate the measured effective thickness of the heterogeneous formation source rock sample in the unknown area based on the fitting relationship between the measured effective thickness and the well logging effective thickness and the well logging effective thickness of the heterogeneous formation source rock sample in the unknown area; Wherein, the lithology effective thickness includes the maximum lithology effective thickness and the minimum lithology effective thickness. When the measured effective thickness is less than or equal to the maximum lithology effective thickness and greater than or equal to the minimum lithology effective thickness, a fitting relationship between the measured effective thickness and the well logging effective thickness is established; Among them, the fitting relationship between the measured effective thickness and the well logging effective thickness is: h 实测 =k×h 测井 Among them, h 实测 is the measured effective thickness, k is the coefficient, h 测井 is the effective logging thickness; Among them, the measured effective thickness of the source rock samples of heterogeneous formations in known areas is obtained through actual measurement; the lithological effective thickness of the source rock samples of heterogeneous formations in known areas is obtained through core measurement method; The maximum value and the minimum value of the effective thickness of the lithology are measured by random measurement method and eyelid measurement method respectively; Among them, the logging effective thickness of the heterogeneous formation source rock samples in the known area is obtained by the logging method.

2. The method for determining the effective thickness of source rock in heterogeneous formation according to claim 1, characterized in that: The Toc content of the heterogeneous formation source rock sample in the known area is greater than the first threshold.

3. An electronic device, characterized in that: The electronic device comprises: A memory storing executable instructions; A processor, wherein the processor runs the executable instructions in the memory to implement the method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations as described in claim 1 or 2.

4. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the method for determining the effective thickness of hydrocarbon source rocks in heterogeneous formations as described in claim 1 or 2.

5. A device for determining the effective thickness of source rocks in heterogeneous formations, characterized in that: include: An acquisition module is used to obtain the measured effective thickness, lithology effective thickness and logging effective thickness of hydrocarbon source rock samples in heterogeneous formations in known areas; A fitting relationship establishment module is used to establish a fitting relationship between the measured effective thickness and the well logging effective thickness based on the measured effective thickness, lithology effective thickness and well logging effective thickness of the heterogeneous formation source rock sample in the known area; A measured effective thickness calculation module, which calculates the measured effective thickness of the heterogeneous formation source rock sample in the unknown area based on the fitting relationship between the measured effective thickness and the well logging effective thickness and the well logging effective thickness of the heterogeneous formation source rock sample in the unknown area; Wherein, the lithology effective thickness includes the maximum lithology effective thickness and the minimum lithology effective thickness. When the measured effective thickness is less than or equal to the maximum lithology effective thickness and greater than or equal to the minimum lithology effective thickness, a fitting relationship between the measured effective thickness and the well logging effective thickness is established; Among them, the fitting relationship between the measured effective thickness and the well logging effective thickness is: h 实测 =k×h 测井 Among them, h 实测 is the measured effective thickness, k is the coefficient, h 测井 is the effective logging thickness; Among them, the measured effective thickness of the source rock samples of heterogeneous formations in known areas is obtained through actual measurement; the lithological effective thickness of the source rock samples of heterogeneous formations in known areas is obtained through core measurement method; The maximum value and the minimum value of the effective thickness of the lithology are measured by random measurement method and eyelid measurement method respectively; Among them, the logging effective thickness of the heterogeneous formation source rock samples in the known area is obtained by the logging method.

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