CN114113536B

CN114113536B - Shale oil resource amount prediction method and device

Info

Publication number: CN114113536B
Application number: CN202010868013.6A
Authority: CN
Inventors: 赵贤正; 周立宏; 蒲秀刚; 金凤鸣; 汪虎; 韩文中; 张伟; 时战楠; 李昊东; 董雄英
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2023-12-22
Anticipated expiration: 2040-08-26
Also published as: CN114113536A

Abstract

The application discloses a method and a device for predicting shale oil resource amount, and belongs to the technical field of shale oil development. The method comprises the following steps: and determining a second movable oil content based on the first movable oil content and the adsorbed oil content, generating a resource quantity distribution diagram of the target region based on the second movable oil content and the adsorbed oil content, dividing the resource quantity distribution diagram according to a numerical interval in which the second movable oil content is positioned to obtain a plurality of shale oil sets, and determining the recoverable resource quantity of the shale oil sets. The method for quantitatively predicting the shale oil resource quantity can calculate the total content of the movable oil, the actual movable oil content and the recoverable resource quantity, the total resource quantity of the shale oil can be evaluated by using the total content of the movable oil, the movable resource quantity of the shale oil can be evaluated by using the actual movable oil content, the recovery resource quantity of the shale oil can be evaluated by using the recoverable resource quantity, a set of resource quantity grading prediction methods are formed, and the accuracy and the practicability of resource quantity determination are improved.

Description

Shale oil resource amount prediction method and device

Technical Field

The application relates to the technical field of shale oil development, in particular to a method and a device for predicting shale oil resource quantity.

Background

In recent years, the yield of conventional oil and gas resources is continuously reduced, and the demand of crude oil is continuously increased by the rapid development of economy, so that the exploration and development of unconventional oil and gas resources are increasingly focused by various countries. Such as shale oil and gas. The united states has successfully changed from the hydrocarbon importation country to the hydrocarbon exportation country through the shale hydrocarbon revolution. Compared with the United states, the development of shale oil gas in China is slow, and particularly shale oil is still in the exploration period of exploration and development, so that a shale oil resource amount prediction method is very important.

Currently, the known methods for predicting the shale oil resource amount at home and abroad mainly comprise analogy methods, volume methods, cause methods and the like. The analogy method is to infer the resource condition of the shale oil to be developed according to the shale oil which is developed. The volumetric method is to determine the boundary value of the shale ore body by using various geological means, further calculate the volume of the shale ore body, and then estimate the shale oil resource amount by using the volume. The causative method is to obtain the total oil quantity of the well developed conventional oilfield basin by basin simulation method, and then determine the shale oil resource quantity according to the total oil quantity and the conventional oil resource quantity.

However, because the Chinese shale oil has larger differences with the American shale oil in aspects of reservoir characteristics, fluid properties, reservoir transformation characteristics and the like, the American resources cannot be compared, the data requirements of a volumetric method on shale ore bodies are higher, the accuracy of predicting the resource quantity is not high, and the causative method is only a general estimation of the resource quantity, and the accuracy and the practicability are not high.

Disclosure of Invention

The embodiment of the application provides a method and a device for predicting the shale oil resource amount, provides a method for quantitatively predicting the shale oil resource amount, forms a set of resource amount grading prediction method, and improves the accuracy and the practicability of resource amount determination. The technical scheme is as follows:

in one aspect, a method for predicting shale oil resource amount is provided, the method comprising:

acquiring first movable oil contents and adsorbed oil contents of a plurality of first-page rock oil samples of a target region, wherein the first movable oil contents are used for representing the total movable oil contents of the first-page rock oil samples;

determining a second movable oil content of the plurality of first sheet oil samples based on the first movable oil content and the adsorbed oil content of the plurality of first sheet oil samples, the second movable oil content being indicative of an actual movable oil content of the first sheet oil samples;

Generating a resource quantity distribution map of the target region based on the second movable oil content and the adsorbed oil content of the plurality of first shale oil samples, wherein the resource quantity distribution map is the movable oil content distribution map of the target region;

in the resource quantity distribution diagram, dividing according to the numerical intervals of the second movable oil contents of the first shale oil samples to obtain a plurality of shale oil sets, wherein the second movable oil contents of the shale oil samples in the shale oil sets correspond to the same numerical interval;

determining a target shale area, a target shale thickness, and a target second movable oil content of the plurality of shale oil collections, respectively, based on the shale area, the shale thickness, and the second movable oil content of the first shale oil sample in the plurality of shale oil collections;

a recoverable resource amount of the plurality of shale oil collections is determined based on the target shale area, the target shale thickness, and the target second movable oil content of the plurality of shale oil collections.

In one possible implementation, the process of obtaining the first movable oil content of the plurality of first sheet rock oil samples includes:

performing thermal decomposition on the plurality of first-page rock oil samples to obtain pyrolysis oil content of the plurality of first-page rock oil samples;

And correcting the pyrolysis oil content of the first plurality of rock oil samples based on a free oil correction coefficient to obtain a first movable oil content of the first plurality of rock oil samples, wherein the free oil correction coefficient is used for compensating the loss content of the free oil in the pyrolysis oil.

In one possible implementation manner, the process for obtaining the free oil correction coefficient includes:

obtaining a plurality of free oil loss rates of a plurality of second shale oil samples of the target region under different experimental conditions, wherein the different experimental conditions comprise at least one of different sealing degrees and different standing durations;

the free oil correction coefficient is determined based on an average loss rate of the plurality of free oil loss rates.

In one possible implementation, the determining the second movable oil content of the plurality of first sheet oil samples based on the first movable oil content and the adsorbed oil content of the plurality of first sheet oil samples comprises:

and determining the second movable oil content of the first rock oil samples based on the first movable oil content, the adsorbed oil content and the unit adsorption coefficient corresponding to the adsorbed oil content of the first rock oil samples, wherein the unit adsorption coefficient is used for indicating the content of the adsorbed oil capable of adsorbing the movable oil in unit mass.

In one possible implementation, the generating the resource quantity profile of the target zone based on the second mobile oil content and the adsorbed oil content of the plurality of first sheet oil samples includes:

determining a plurality of third shale oil samples belonging to the same plane and a plurality of fourth shale oil samples belonging to the same section in a plurality of first shale oil samples of the target region;

determining a first corresponding relation between the second movable oil content and the adsorbed oil content based on the second movable oil content and the adsorbed oil content of the plurality of third shale oil samples, and generating a planar resource quantity distribution map of the target region, wherein the planar resource quantity distribution map is the movable oil content distribution map of the target region on a plane;

and determining a second corresponding relation between the second movable oil content and the adsorbed oil content based on the second movable oil content and the adsorbed oil content of the fourth shale oil samples, and generating a profile resource quantity distribution map of the target region, wherein the profile resource quantity distribution map is the movable oil content distribution map of the target region on a profile.

In one possible implementation, the determining of the target shale area includes:

based on the planar resource quantity distribution diagram of the target region, respectively determining a plurality of first shale oil samples belonging to the same plane in the shale oil sets;

And carrying out weighted average on shale areas of the plurality of first shale oil samples belonging to the same plane to obtain target shale areas of the plurality of shale oil sets.

In one possible implementation, the determining of the target shale thickness includes:

based on the profile resource quantity distribution diagram of the target region, respectively determining a plurality of first shale oil samples belonging to the same profile in the shale oil sets;

and carrying out weighted average on the shale thicknesses of the plurality of first shale oil samples belonging to the same section to obtain target shale thicknesses of the plurality of shale oil sets.

In one possible implementation, the determining the amount of the recoverable resource for the plurality of shale oil collections based on the target shale area, the target shale thickness, and the target second movable oil content for the plurality of shale oil collections comprises:

and determining the product of the target shale area, the target shale thickness, the target second movable oil content and the shale density of the target region of the plurality of shale oil sets as the recoverable resource quantity of the plurality of shale oil sets.

In one possible implementation, the method further includes:

acquiring the volume content of a plurality of minerals in a plurality of first-page rock oil samples of the target region based on the plurality of first-page rock oil samples, wherein the plurality of minerals comprise at least one of quartz, feldspar, dolomite, calcite and zeolite;

Determining a friability index of the plurality of first sheet rock oil samples based on the volume content of the plurality of minerals, the friability coefficient of the plurality of minerals, and the total volume of the plurality of first sheet rock oil samples, the friability index being indicative of the rock friability of the first sheet rock oil samples.

In one aspect, a device for predicting shale oil resource amount is provided, the device comprising:

the acquisition module is used for acquiring first movable oil contents and adsorbed oil contents of a plurality of first-page rock oil samples of a target region, wherein the first movable oil contents are used for representing the total movable oil contents of the first-page rock oil samples;

a movable oil content determination module for determining a second movable oil content of the plurality of first-page rock oil samples based on the first movable oil content and the adsorbed oil content of the plurality of first-page rock oil samples, the second movable oil content being indicative of an actual movable oil content of the first-page rock oil samples;

the generation module is used for generating a resource quantity distribution map of the target region based on the second movable oil content and the adsorbed oil content of the plurality of first rock oil samples, wherein the resource quantity distribution map is the movable oil content distribution map of the target region;

the dividing module is used for dividing the resource quantity distribution diagram according to the numerical intervals of the second movable oil contents of the plurality of first shale oil samples to obtain a plurality of shale oil sets, wherein the second movable oil contents of the shale oil samples in the shale oil sets correspond to the same numerical interval;

The shale oil set determining module is used for determining target shale areas, target shale thicknesses and target second movable oil contents of the plurality of shale oil sets respectively based on shale areas, shale thicknesses and second movable oil contents of first shale oil samples in the plurality of shale oil sets;

the recoverable resource amount determination module is used for determining recoverable resource amounts of the plurality of shale oil sets based on the target shale area, the target shale thickness and the target second movable oil content of the plurality of shale oil sets.

In one possible implementation, the pyrolysis oil content of the plurality of first-page rock oil samples is obtained by thermal decomposition of the plurality of first-page rock oil samples, and the apparatus further includes a correction module for correcting the pyrolysis oil content of the plurality of first-page rock oil samples based on a free oil correction coefficient, so as to obtain a first movable oil content of the plurality of first-page rock oil samples, where the free oil correction coefficient is used for compensating for a loss content of free oil in the pyrolysis oil.

In one possible implementation, the apparatus further includes:

the loss rate acquisition module is used for acquiring a plurality of free oil loss rates of a plurality of second shale oil samples of the target region under different experimental conditions, wherein the different experimental conditions comprise at least one of different sealing degrees and different standing durations;

And the correction coefficient determining module is used for determining the free oil correction coefficient based on the average loss rate of the plurality of free oil loss rates.

In one possible implementation manner, the movable oil content determining module is configured to determine the second movable oil content of the plurality of first rock oil samples based on the first movable oil content, the adsorbed oil content, and a unit adsorption coefficient corresponding to the adsorbed oil content, where the unit adsorption coefficient is used to indicate a content capable of adsorbing the movable oil per unit mass of the adsorbed oil.

In one possible implementation, the generating module includes:

the sample determining submodule is used for determining a plurality of third shale oil samples belonging to the same plane and a plurality of fourth shale oil samples belonging to the same section in a plurality of first shale oil samples of the target region;

the generation submodule is used for determining a first corresponding relation between the second movable oil content and the adsorbed oil content based on the second movable oil content and the adsorbed oil content of the plurality of third shale oil samples, and generating a plane resource quantity distribution map of the target region, wherein the plane resource quantity distribution map is a movable oil content distribution map of the target region on a plane;

The generation submodule is further used for determining a second corresponding relation between the second movable oil content and the adsorbed oil content based on the second movable oil content and the adsorbed oil content of the fourth shale oil samples, and generating a profile resource quantity distribution map of the target region, wherein the profile resource quantity distribution map is a movable oil content distribution map of the target region on a profile.

In one possible implementation, the apparatus further includes:

the sample determining module is used for respectively determining a plurality of first shale oil samples belonging to the same plane in the shale oil sets based on the plane resource quantity distribution map of the target region;

and the weighted average module is used for weighted averaging the shale areas of the plurality of first shale oil samples belonging to the same plane to obtain target shale areas of the plurality of shale oil sets.

In one possible implementation, the apparatus further includes:

the sample determining module is further used for respectively determining a plurality of first shale oil samples belonging to the same profile in the shale oil sets based on the profile resource quantity distribution map of the target region;

and the weighted average module is also used for weighted averaging the shale thicknesses of the plurality of first shale oil samples belonging to the same section to obtain target shale thicknesses of the plurality of shale oil sets.

In one possible implementation, the recoverable resource amount determination module is configured to determine, as the recoverable resource amount of the plurality of shale oil collections, a product of the target shale area, the target shale thickness, the target second movable oil content, and the shale density of the target zone.

In one possible implementation, the apparatus further includes:

the volume content acquisition module is used for acquiring the volume content of a plurality of minerals in a plurality of first-page rock oil samples based on the plurality of first-page rock oil samples of the target region, wherein the plurality of minerals comprise at least one of quartz, feldspar, dolomite, calcite and zeolite;

a brittleness index determination module for determining a brittleness index of the plurality of first sheet rock oil samples based on the volume content of the plurality of minerals, the brittleness coefficient of the plurality of minerals, and the total volume of the plurality of first sheet rock oil samples, the brittleness index being used to represent rock brittleness of the first sheet rock oil samples.

In one possible implementation manner, the partitioning module is further configured to partition, in the resource quantity distribution map of the target region, based on the second movable oil content, the adsorbed oil content, and the brittleness index of the first plurality of rock oil samples, to obtain a plurality of shale oil sets.

In one aspect, a terminal is provided that includes a processor and a memory having at least one instruction stored therein that is loaded and executed by the processor to implement the above-described method of predicting shale oil resource amount.

In one aspect, a computer readable storage medium is provided, wherein at least one instruction is stored in the computer readable storage medium, and the at least one instruction is loaded and executed by a processor to implement the method for determining a target address of a drilling platform.

According to the technical scheme provided by the embodiment of the application, the method for quantitatively predicting the shale oil resource quantity is provided, the total content of movable oil, the actual movable oil content and the recoverable resource quantity can be calculated, the total resource quantity of the shale oil can be evaluated by utilizing the total content of the movable oil, the movable resource quantity of the shale oil can be evaluated by utilizing the actual movable oil content, the recoverable resource quantity can be evaluated by utilizing the recoverable resource quantity, a set of resource quantity grading prediction methods are formed, in addition, the resource quantity type of a resource distribution map of the shale oil is divided, the resource quantity evaluation from a single sample to a type set is realized, the evaluation of shale oil with different resource quantity types is realized, abundant resource data is provided for technicians, the follow-up exploration and recovery of the shale oil are facilitated, and the accuracy and the practicability of the predicted shale oil resource quantity are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method for predicting shale oil resource amount provided by an embodiment of the present application;

FIG. 2 is a flow chart of a method for predicting shale oil resource amount provided by an embodiment of the present application;

FIG. 3 is a schematic diagram showing oil mass change of a shale oil sample before and after standing for 24 hours according to an embodiment of the present application;

fig. 4 is a schematic diagram of a correspondence relationship between a first movable oil content and an adsorbed oil content according to an embodiment of the present application;

FIG. 5 is a schematic illustration of the calculation of a second movable oil content provided in an embodiment of the present application;

FIG. 6 is a flow chart of a method for predicting shale oil resource amount provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of a resource amount distribution diagram provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of a planar resource amount distribution diagram according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of a device for predicting shale oil resource amount according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the application provides a method for predicting the shale oil resource amount, which can be applied to the technical field of shale oil development and is particularly used for predicting the total resource amount, the movable resource amount and the recoverable resource amount of shale oil in a certain region or a certain research area. In the implementation process, a technician collects shale oil samples below an oil well by using sampling tools such as a sampling shovel, a pointed steel shovel and a sampling barrel, selects a certain shale oil sample from the shale oil samples, divides the shale oil samples into a first shale oil sample and a second shale oil sample, can determine the total resource amount, the movable resource amount and the recoverable resource amount of the shale oil by using the method for predicting the shale oil resource amount provided by the embodiment of the application, and divides the shale oil in a research area into types, so that the movable resource amount and the recoverable resource amount of each type of shale oil are obtained, and abundant data support and theoretical reference are provided for subsequent shale oil development.

It should be noted that, the method for predicting the shale oil resource amount provided in the embodiment of the present application may be executed by a terminal, and the corresponding process is: after the sampling is completed, the technician respectively performs experimental measurement on the first shale oil sample and the second shale oil sample, and then inputs the experimental data obtained by measurement into the terminal, so that the terminal can obtain the experimental data, and further, the terminal comprehensively calculates the experimental data according to the experimental data and the shale oil resource quantity prediction method provided by the embodiment of the application, so that the processes of calculating the content of the movable oil, generating a resource quantity distribution map, dividing the resource quantity distribution map, calculating the recoverable resource quantity and the like can be realized, the movable resource quantity and the recoverable resource quantity of each resource quantity type shale oil are further obtained, and resource data support is provided for the technician, so that the follow-up exploration and exploitation of the shale oil are facilitated.

Fig. 1 is a flowchart of a method for predicting shale oil resource amount according to an embodiment of the present application. Referring to fig. 1, this embodiment includes:

101. a first movable oil content and an adsorbed oil content of a plurality of first sheet oil samples of a target zone are obtained, the first movable oil content being used to represent a total movable oil content of the first sheet oil samples.

102. A second movable oil content of the plurality of first sheet oil samples is determined based on the first movable oil content and the adsorbed oil content of the plurality of first sheet oil samples, the second movable oil content being indicative of an actual movable oil content of the first sheet oil samples.

103. And generating a resource quantity distribution map of the target region based on the second movable oil content and the adsorbed oil content of the plurality of first shale oil samples, wherein the resource quantity distribution map is the movable oil content distribution map of the target region.

104. In the resource quantity distribution diagram, dividing according to the numerical intervals of the second movable oil contents of the first shale oil samples to obtain a plurality of shale oil sets, wherein the second movable oil contents of the shale oil samples in the shale oil sets correspond to the same numerical interval.

105. The target shale area, target shale thickness, and target second movable oil content of the plurality of shale oil collections are determined based on the shale area, shale thickness, and second movable oil content of the first shale oil sample of the plurality of shale oil collections, respectively.

106. A recoverable resource amount of the plurality of shale oil collections is determined based on the target shale area, the target shale thickness, and the target second movable oil content of the plurality of shale oil collections.

Fig. 2 is a flowchart of a method for predicting shale oil resource amount according to an embodiment of the present application. Referring to fig. 2, this embodiment includes:

201. a plurality of first shale oil samples and a plurality of second shale oil samples of a target zone are obtained.

The target region is used for representing the region where shale oil to be developed is located. Both the first shale oil sample and the second shale oil sample are used to represent shale oil samples within the target zone. Both the first shale oil sample and the second shale oil sample are fresh samples within the target zone. It should be noted that the first shale oil sample and the second shale oil sample are substantially the same, and are named differently only based on the different uses of the shale oil samples, the first shale oil sample is used for determining the subsequent shale oil resource amount, and the second shale oil sample is used for determining the subsequent free oil correction coefficient.

In one possible implementation manner, a technician samples by drilling and airtight coring, that is, by using a coring tool with an inner cylinder filled with a special sealing liquid, drills into a shale oil ore body of a target region, and acquires a plurality of shale oil samples of the target region, that is, acquires a plurality of first shale oil samples and a plurality of second shale oil samples. Through airtight coring mode, can prevent mud to infest shale oil sample, can guarantee shale oil sample's integrality simultaneously.

202. And based on a standing experiment of a plurality of second shale oil samples of the target region, acquiring free oil correction coefficients of the second shale oil samples, wherein the free oil correction coefficients are used for compensating the loss content of free oil in pyrolysis oil.

The pyrolysis oil refers to an oil-containing product obtained by thermal decomposition of shale oil. The shale oil is mainly in the form of free oil (movable oil) which is a part of oil which can flow in the shale reservoir and can be extracted from the shale reservoir by the existing oil extraction process, and adsorbed oil (immovable oil) which is a part of oil which cannot flow in the shale reservoir and cannot be extracted from the shale reservoir by the existing oil extraction process.

In one possible implementation, after a technician obtains a plurality of second shale oil samples of a target region, obtains a plurality of free oil loss rates of the plurality of second shale oil samples of the target region under different experimental conditions, and determines the free oil correction factor based on an average loss rate of the plurality of free oil loss rates.

In the following, it is exemplified how to determine the free oil correction factor based on the average loss rate, for example, if the average loss rate is 20%, the ratio of the remaining oil (i.e., pyrolysis oil) excluding the lost free oil is 1-20% = 80%, and if the loss content of the free oil in the pyrolysis oil is to be compensated, that is, if the original total oil amount is to be determined based on the pyrolysis oil, the free oil correction factor is determined by 80% ×125% = 1 or 1/80% = 125%, then 125% is the free oil correction factor in this example.

Optionally, the different experimental conditions include at least one of different degrees of occlusion and different periods of rest. The process of obtaining the correction coefficient of the free oil is described in detail below:

in a possible implementation manner, taking different experimental conditions as an example of a sealing degree 0 and a sealing degree 100%, that is, taking an example of an open experimental condition and a closed experimental condition, the corresponding process of obtaining the free oil correction coefficient is as follows: under the open experimental condition, crushing a part of shale oil samples in the plurality of second shale oil samples to obtain a first crushed sample, crushing another part of shale oil samples in the plurality of second shale oil samples under the closed experimental condition to obtain a second crushed sample, and weighing the first crushed sample and the second crushed sample to obtain the original quality of the first crushed sample and the second crushed sample. Then, the first crushed sample is kept stand for a target period of time under the open experimental condition, wherein the target period of time is a fixed period of time, such as 24 hours, and the second crushed sample is kept stand for the same period of time as the target period of time under the closed experimental condition. And weighing the first crushed sample and the second crushed sample again after the standing is finished, so as to obtain the mass of the first crushed sample and the second crushed sample after the standing. And calculating the mass difference between the original mass and the rest mass of the first crushed sample and the second crushed sample respectively, calculating to obtain the loss content of the free oil in the first crushed sample and the second crushed sample, calculating the mass ratio of the loss content of the free oil in the original mass according to the loss content of the free oil and the original mass, calculating to obtain the first free oil loss rate under the open experimental condition and the second free oil loss rate under the closed experimental condition, calculating the average loss rate of the first free oil loss rate and the second free oil loss rate, and further determining the free oil correction coefficient based on the average loss rate. In the process, under the experimental conditions of different sealing degrees, the free oil loss rates corresponding to the different sealing degrees can be obtained, and then the free oil correction coefficient is determined according to the average loss rates of the different sealing degrees, so that the reliability and the authenticity of experimental results are improved in consideration of different sealing conditions, the experimental errors are reduced, and the accuracy and the reliability of correction are improved when the on-site actual measurement data are corrected subsequently.

In another possible implementation manner, taking different experimental conditions as a standing time period of 0 hour, a standing time period of 24 hours and a standing time period of 48 hours as examples, the corresponding process of obtaining the free oil correction coefficient is as follows: and crushing the plurality of second shale oil samples to obtain crushed samples of the plurality of second shale oil samples, dividing the crushed samples into three parts, and weighing the three parts of crushed samples respectively to obtain the original quality of the three parts of crushed samples. Next, a part of the crushed samples was left to stand for 0 hour, another part of the crushed samples was left to stand for 24 hours, and another part of the crushed samples was left to stand for 48 hours. And weighing the three parts of crushed samples again after the standing is finished, so as to obtain the mass of the three parts of crushed samples after the standing. And respectively calculating mass difference values between the original mass and the rest mass of the three-part crushed sample, calculating to obtain the loss content of the free oil in the three-part crushed sample, calculating the mass ratio of the loss content of the free oil in the original mass according to the loss content of the free oil and the original mass, calculating to obtain the loss rate of the free oil of the three-part crushed sample, calculating the average loss rate of the free oil of the three-part crushed sample, and further determining the free oil correction coefficient based on the average loss rate. In the process, under the experimental conditions of different standing time periods, the free oil loss rate corresponding to the different standing time periods can be obtained, and then the free oil correction coefficient is determined according to the average loss rate of the different standing time periods, so that the reliability and the authenticity of an experimental result are improved in consideration of the different standing time periods, the experimental error is reduced, and the accuracy and the reliability of correction are improved when the on-site actual measurement data are corrected subsequently.

It should be understood that the above process is described by taking different sealing degrees and different standing durations as examples, and of course, the technician can also obtain the free oil correction coefficient under the experimental conditions of different sealing degrees and different standing durations. In addition, the above process is a process of obtaining the free oil correction coefficient under different experimental conditions, and in another possible implementation manner, the technician can also determine the free oil correction coefficient based on a plurality of free oil loss rates of a plurality of second shale oil samples under the same experimental conditions. The embodiment of the application does not limit what mode is selected to obtain the free oil correction coefficient. In the embodiment of the application, the change of the movable oil content between the underground shale oil and the overground shale oil is simulated by using an experimental method, the correction coefficient of the free oil is determined, and then the correction is carried out according to the correction coefficient of the free oil, so that the total movable oil content in the underground shale oil is obtained, and the total resource amount of the shale oil can be accurately calculated.

After the second shale oil samples are kept stand for a target period, if two (or more than two) cases with great difference of free oil loss exist, the free oil loss rates of the two cases (or more than two) are calculated respectively, the free oil correction rates of the two (or more than two) cases are calculated according to the free oil loss rates of the two (or more than two) cases, and then the average free oil correction rate is calculated according to the free oil correction rates of the two (or more than two) cases, and the average free oil correction rate is used as the free oil correction coefficient.

For example, fig. 3 is a schematic diagram of oil mass change before and after the shale oil sample is left to stand for 24 hours, and fig. 3 is an example of leaving 10 groups of second shale oil samples to stand for 24 hours, and as shown in fig. 3, the free oil loss rate of the 10 groups of second shale oil samples after leaving for 24 hours can be approximately divided into 2 types, and the free oil loss of the type one and the type two is greatly different. The free oil loss rate of the shale oil sample of the type I after standing for 24 hours is about 20 percent on average, the free oil correction rate can be calculated to be 125 percent, the free oil loss rate of the shale oil sample of the type II after standing for 24 hours is about 47 percent on average, the free oil correction rate can be calculated to be 189 percent, the average free oil correction rate is calculated according to the 125 percent and the 47 percent of the two free oil correction rates, and the average free oil correction rate is 157 percent and is taken as the free oil correction coefficient.

203. Based on the free oil correction coefficient, a first movable oil content of a plurality of first-page rock oil samples of the target region is obtained, wherein the first movable oil content is used for representing the total movable oil content of the first-page rock oil samples.

The first movable oil content is used to represent the total movable oil content of the first rock oil sample, and the total movable oil content is the movable oil content in a state close to the stratum, and can be also called the total retention oil content.

In one possible implementation manner, a technician weighs the first plurality of rock oil samples to obtain the original mass of the first plurality of rock oil samples, then thermally decomposes the first plurality of rock oil samples, so that organic matters in the first plurality of rock oil samples are thermally decomposed, and the thermally decomposed steam is condensed to obtain a thermally decomposed product, weighs the thermally decomposed product to obtain the mass of the thermally decomposed product, and determines the mass ratio of the mass of the thermally decomposed product in the original mass, namely, the pyrolysis oil content of the first plurality of rock oil samples is obtained. And correcting the pyrolysis oil content of the first plurality of rock oil samples based on the free oil correction coefficient, so as to obtain the first movable oil content of the first plurality of rock oil samples.

Optionally, the determining process of the first movable oil content is: a first mobile oil content of the plurality of first sheet oil samples is determined based on the pyrolysis oil content, the free oil correction factor, and equation (1) for the plurality of first sheet oil samples.

In the method, in the process of the invention,a first mobile oil content in mg/g, S, of a first sheet of a rock oil sample ₁ The pyrolysis oil content of the first shale oil sample is mg/g, K _{School and school} The free oil correction coefficient is free of units, and the average value is 1.5.

204. And obtaining the adsorbed oil content of a plurality of first-page rock oil samples of the target region.

Wherein, the adsorbed oil content refers to the content of residual total organic carbon in shale oil. It should be appreciated that the adsorbed oil within the shale oil is capable of adsorbing the mobile oil, bringing it into an adsorbed oil form.

In one possible implementation, a technician measures oxygen consumption of the plurality of first-page rock oil samples by means of an oxidation method, approximates the oxygen consumption to the organic matter content in the shale oil, and can obtain adsorbed oil content of the plurality of first-page rock oil samples. Optionally, a TOC analyzer is used to measure the adsorbed oil content of the first sheet of rock oil sample.

Optionally, after obtaining the first movable oil content and the adsorbed oil content of the plurality of first shale oil samples through steps 201 to 204, a corresponding relationship between the first movable oil content and the adsorbed oil content may be further generated, and according to the corresponding relationship between the first movable oil content and the adsorbed oil content, a geological dessert of the target region may be rapidly evaluated, where the geological dessert refers to a shale oil reservoir. For example, according to the correspondence between the first movable oil content and the adsorbed oil content, a technician can quickly learn the movable oil amount lower limit of the shale oil, can quickly determine the movable oil amount range of the shale oil, and the like. Optionally, the correspondence is in the form of a curve. For example, FIG. 4 is a schematic diagram showing the correspondence between the first movable oil content and the adsorbed oil content according to the embodiment of the present application, FIG. 4 is a scatter diagram according to the first movable oil content and the adsorbed oil content, as shown in FIG. 4, the abscissa of FIG. 4 is the adsorption of the first sheet of the rock oil sample The additional oil content, the ordinate is the first movable oil content of the first sheet of rock oil sample, three straight lines are included in FIG. 4, respectively straight line S ₁ ^* =100 mg/gTOC, straight line S ₁ ^* =200 mg/gctoc and straight line S ₁ ^* =300 mg/gctoc, where 100mg/g, 200mg/g and 300mg/g are the slopes of the three lines, respectively. Alternatively, the slope of a straight line, such as line S, can be determined from the point through which the straight line passes ₁ ^* By passing point (5, 5) with 100mg/gTOC, the slope of the straight line is determined to be 100mg/g based on the 5mg/g on the ordinate and 5% on the abscissa of point (5, 5). And according to straight line S ₁ ^* When the second movable oil amount lower limit is 0mg/g, the first movable oil amount lower limit of shale oil is 100mg/g.

205. A second movable oil content of the plurality of first sheet oil samples is determined based on the first movable oil content and the adsorbed oil content of the plurality of first sheet oil samples, the second movable oil content being indicative of an actual movable oil content of the first sheet oil samples.

In one possible implementation, the second movable oil content of the plurality of first sheet oil samples is determined based on the first movable oil content, the adsorbed oil content, and a unit adsorption factor corresponding to the adsorbed oil content, where the unit adsorption factor is used to indicate a content capable of adsorbing movable oil per unit mass of adsorbed oil.

Optionally, the determining process of the second movable oil content is: determining a second movable oil content of the plurality of first sheet oil samples based on the first movable oil content, the adsorbed oil content, the unit adsorption factor corresponding to the adsorbed oil content, and formula (2).

Wherein S is _{Movable device} A second mobile oil content in mg/g for the first sheet of rock oil sample,a first mobile oil content in mg/g, K for a first sheet of a rock oil sample _{Suction pipe} The unit is adsorption coefficient, the unit is mg/g, TOC is adsorption oil content of the first shale oil sample, and the unit is%.

Optionally, according to the adsorbed oil content of the first shale oil sample, determining the content of the organic carbon capable of adsorbing the movable oil in unit mass, and determining the unit adsorption coefficient corresponding to the adsorbed oil content. Typically, the unit adsorption factor takes a value of 100.

Through the process, the movable resource amount of the shale oil can be evaluated according to the determined second movable oil content (actual movable oil content), and the second movable oil content (actual movable oil content) is determined according to the total movable oil content because the first movable oil content is used for representing the total movable oil content in the shale oil, so that the accuracy of determining the second movable oil content (actual movable oil content) is improved, a new calculation method of the actual movable oil content is innovated, and the practicability of a calculation result is improved.

It should be noted that the embodiments of the present application also provide another method for calculating the content of the second movable oil. It should be understood that the lower limit of the second movable oil amount means that the second movable oil content is equal to 0, and according to the formula (2), the lower limit of the second movable oil amount corresponds to S ₁ *＝K _{Suction pipe} * TOC. FIG. 5 is a schematic diagram showing calculation of the second movable oil content according to the embodiment of the present application, wherein FIG. 5 shows the adsorbed oil content TOC of the first-page rock oil sample on the abscissa and the first movable oil content S of the first-page rock oil sample on the ordinate ₁ ^* . Fig. 5 shows a straight line S ₁ *＝K _{Suction pipe} * TOC, the straight line S ₁ *＝K _{Suction pipe} * TOC is used to represent the second movable oil amount lower limit. Since the second movable oil content can be expressed as any point M on the equivalent line to a straight line S ₁ *＝K _{Suction pipe} * The TOC distance is then determined from point M to straight line S according to equation (3) ₁ *＝K _{Suction pipe} * Distance of TOC.

Wherein D is the point M on the equivalent line to the straight line S in FIG. 5 ₁ *＝K _{Suction pipe} * Distance of TOC, S ₁ ^* The unit of the first movable oil content is mg/g, the unit of TOC is the adsorption oil content of the first rock oil sample, and the unit is K _{Suction pipe} The unit is adsorption coefficient, and the unit is mg/g.

In the formula, θ is a straight line S in FIG. 5 ₁ *＝K _{Suction pipe} * The angle between TOC and abscissa is also the point M to the straight line S ₁ *＝K _{Suction pipe} * The angle between the straight line where the TOC distance is located and the ordinate, K _{Suction pipe} The unit is adsorption coefficient, and the unit is mg/g.

Substituting formula (1) and formula (4) into formula (3) yields formula (5):

S _{movable device} ＝L (5)

Where L is the intercept of the equivalent line at which point M in FIG. 5 lies. By the deduction of the formula, a method for calculating the content of the second movable oil is obtained, and by the method, the content of the second movable oil can be rapidly determined by combining with fig. 5, so that the efficiency of calculating the content of the second movable oil is improved.

The embodiment of the present application does not limit the manner in which the second movable oil content is calculated.

206. And generating a resource quantity distribution map of the target region based on the second movable oil content and the adsorbed oil content of the plurality of first shale oil samples, wherein the resource quantity distribution map is the movable oil content distribution map of the target region.

In one possible implementation manner, in a plurality of first shale oil samples of the target region, a plurality of third shale oil samples belonging to the same plane and a plurality of fourth shale oil samples belonging to the same section are determined, based on the second movable oil content and the adsorbed oil content of the plurality of third shale oil samples, a first corresponding relation between the second movable oil content and the adsorbed oil content is determined, and a planar resource quantity distribution map of the target region is generated, wherein the planar resource quantity distribution map is a movable oil content distribution map of the target region on a plane. And determining a second corresponding relation between the second movable oil content and the adsorbed oil content based on the second movable oil content and the adsorbed oil content of the fourth shale oil samples, and generating a profile resource quantity distribution map of the target region, wherein the profile resource quantity distribution map is the movable oil content distribution map of the target region on a profile. In the process, a plane resource quantity distribution map is generated according to shale oil samples belonging to the same plane, a profile resource quantity distribution map is generated according to shale oil samples belonging to the same profile, more abundant resource data is provided by generating the resource quantity distribution maps of the plane and the profile, and a technician can know the resource quantity distribution of the shale oil plane and the resource quantity distribution of the profile through the resource quantity distribution maps of the plane and the profile.

It should be understood that, when drilling and sampling, a technician can record the sampling point positions of a plurality of first shale oil samples, and then after the sampling is finished, according to the sampling point positions corresponding to the plurality of first shale oil samples, a plurality of third shale oil samples belonging to the same plane and a plurality of fourth shale oil samples belonging to the same section can be determined. For example, the plurality of third shale oil samples in the same plane may be a plurality of shale oil samples on a zone plane of the target zone, and the plurality of fourth shale oil samples in the same section may be a plurality of shale oil samples in a single well longitudinal direction.

207. In the resource quantity distribution diagram, dividing according to the numerical intervals of the second movable oil contents of the first shale oil samples to obtain a plurality of shale oil sets, wherein the second movable oil contents of the shale oil samples in the shale oil sets correspond to the same numerical interval.

The numerical range refers to a movable oil content range of the second movable oil content. Alternatively, the value interval in which the second movable oil content is located may be set manually by a skilled person.

In one possible implementation manner, in the plane resource quantity distribution diagram and the section resource quantity distribution diagram, the numerical intervals where the second movable oil contents of the plurality of first shale oil samples are located are divided according to the numerical intervals, so that a plurality of shale oil sets on the plane and a plurality of shale oil sets on the section are obtained.

208. The target shale area, target shale thickness, and target second movable oil content of the plurality of shale oil collections are determined based on the shale area, shale thickness, and second movable oil content of the first shale oil sample of the plurality of shale oil collections, respectively.

Optionally, the determining process of the target shale area is as follows: and respectively determining a plurality of first shale oil samples belonging to the same plane in the plurality of shale oil sets based on the plane resource quantity distribution map of the target region, and carrying out weighted average on shale areas of the plurality of first shale oil samples belonging to the same plane to obtain target shale areas of the plurality of shale oil sets.

Optionally, the determining process of the target shale thickness is: and respectively determining a plurality of first shale oil samples belonging to the same section in the plurality of shale oil sets based on the section resource quantity distribution map of the target region, and carrying out weighted average on the shale thicknesses of the plurality of first shale oil samples belonging to the same section to obtain target shale thicknesses of the plurality of shale oil sets.

Optionally, the determining process of the target second movable oil content is: and carrying out weighted average on the second movable oil contents of the first shale oil samples based on the first shale oil samples of the target region to obtain target second movable oil contents of the shale oil sets.

In the process, the target shale area, the target shale thickness and the target second movable oil content of the shale oil set are obtained in a weighted average mode, a representative target value is effectively determined, and the accuracy of subsequent calculation of the recoverable resource quantity is improved.

209. A recoverable resource amount of the plurality of shale oil collections is determined based on the target shale area, the target shale thickness, and the target second movable oil content of the plurality of shale oil collections.

In one possible implementation, a product of a target shale area, a target shale thickness, a target second movable oil content, and a shale density of the target zone for the plurality of shale oil collections is determined as a recoverable resource quantity for the plurality of shale oil collections.

Optionally, the determining process of the available resource amount is: the amount of recoverable resources for the plurality of shale oil collections is determined based on the target shale area, the target shale thickness, the target second movable oil content, the shale density of the target zone, and equation (6).

Q＝0.1×S×h×ρ×S _{Movable device} (6)

Wherein Q is the amount of recoverable resources of the shale oil set, S is the target shale area of the shale oil set, h is the target shale thickness of the shale oil set, ρ is the shale density of the target region, S _{Movable device} A target second mobile oil content for the shale oil collection.

According to the technical scheme provided by the embodiment of the application, the method for quantitatively predicting the shale oil resource quantity is provided, the total content of movable oil, the actual movable oil content and the recoverable resource quantity can be calculated, the total resource quantity of the shale oil can be evaluated by utilizing the total content of the movable oil, the movable resource quantity of the shale oil can be evaluated by utilizing the actual movable oil content, the recoverable resource quantity can be evaluated by utilizing the recoverable resource quantity, a set of resource quantity grading prediction methods are formed, in addition, the resource quantity type of a resource distribution map of the shale oil is divided, the resource quantity evaluation from a single sample to a type set is realized, the evaluation of shale oil with different resource quantity types is realized, abundant resource data is provided for technicians, the follow-up exploration and recovery of the shale oil are facilitated, and the accuracy and the practicability of the predicted shale oil resource quantity are improved. The application establishes an evaluation method of the recoverable resources of the shale oil, provides a new means for grading and quantitatively evaluating the shale oil resources, fills up the blank in the field, establishes a calculation method of the recoverable resources amount suitable for the lake-phase shale, and provides quantitative data support for the exploration and development of the lake-phase shale oil.

Fig. 6 is a flowchart of a method for predicting shale oil resource amount according to an embodiment of the present application. Referring to fig. 6, this embodiment includes:

601. a plurality of first shale oil samples and a plurality of second shale oil samples of a target zone are obtained.

602. And based on a standing experiment of a plurality of second shale oil samples of the target region, acquiring free oil correction coefficients of the second shale oil samples, wherein the free oil correction coefficients are used for compensating the loss content of free oil in pyrolysis oil.

603. Based on the free oil correction coefficient, a first movable oil content of a plurality of first-page rock oil samples of the target region is obtained, wherein the first movable oil content is used for representing the total movable oil content of the first-page rock oil samples.

604. And obtaining the adsorbed oil content of a plurality of first-page rock oil samples of the target region.

605. A second movable oil content of the plurality of first sheet oil samples is determined based on the first movable oil content and the adsorbed oil content of the plurality of first sheet oil samples, the second movable oil content being indicative of an actual movable oil content of the first sheet oil samples.

606. And generating a resource quantity distribution map of the target region based on the second movable oil content and the adsorbed oil content of the plurality of first shale oil samples, wherein the resource quantity distribution map is the movable oil content distribution map of the target region.

It should be noted that, the contents of steps 601 to 606 are the same as those of steps 201 to 206, and will not be repeated.

607. The method includes obtaining a volume content of a plurality of minerals in the plurality of first sheet oil samples, the plurality of minerals including at least one of quartz, feldspar, dolomite, calcite, and zeolite.

In one possible implementation manner, through a total rock X-ray diffraction analysis algorithm, a total rock X-ray diffraction analysis is performed on a plurality of first-page rock oil samples of the target region, so as to obtain the volume contents of a plurality of minerals in the plurality of first-page rock oil samples.

608. Determining a friability index of the plurality of first sheet rock oil samples based on the volume content of the plurality of minerals, the friability coefficient of the plurality of minerals, and the total volume of the plurality of first sheet rock oil samples, the friability index being indicative of the rock friability of the first sheet rock oil samples.

Wherein the friability index is used to represent the rock friability of the first sheet of rock oil sample. The larger the brittleness index, the more brittle the rock, and the smaller the brittleness index, the less brittle the rock. It should be appreciated that the more brittle the rock, the easier the shale oil is extracted and the better the development.

In the examples of the present application, the brittleness coefficient table of the different minerals is shown in table 1.

TABLE 1

Mineral material	Quartz	Feldspar	Dolomite (Dolomite)	Calcite	Zeolite
						Coefficient of brittleness	1	0.3	0.73	0.49	0.51

Alternatively, taking various minerals including quartz, feldspar, dolomite, calcite and zeolite as examples, the brittleness index of the first sheet of rock oil sample was determined by: the friability index of the first sheet of rock oil sample is determined based on the volume content of the plurality of minerals in the first sheet of rock oil sample, the friability coefficient of the plurality of minerals, the total volume of the plurality of first sheet of rock oil samples, and equation (7).

Wherein B is the brittleness index of the first shale oil sample, V _Quartz V for the volume content of quartz in the first shale oil sample _Feldspar V for the volume content of feldspar in the first sheet of rock oil sample _Calcite For the volume content of calcite in the first sheet of petrolatum sample, V _{Dolomite (Dolomite)} For the volume content of dolomite in the first sheet of rock oil sample, V _Zeolite For the volume content of zeolite in the first sheet of rock oil sample, V _Clay V for the volume content of quartz in the first shale oil sample _{Organic matter} Is the volume content of organic matters in the first shale oil sample. The above formula (7) is described by taking the numerical value of the decimal point of the brittleness coefficient as an example.

609. And in the resource quantity distribution diagram of the target region, dividing the resource quantity distribution diagram based on the second movable oil content, the adsorbed oil content and the brittleness index of the first rock oil samples to obtain a plurality of shale oil sets.

In one possible implementation, after the brittleness index of the first plurality of rock oil samples is calculated, a relationship between the adsorbed oil content and the brittleness index can be determined according to the adsorbed oil content of the first plurality of rock oil samples. And determining at least one adsorbed oil content interval value according to the relation between the brittleness index and the adsorbed oil content. And in the resource quantity distribution diagram of the target region, dividing according to the numerical interval corresponding to the at least one adsorbed oil content interval value to obtain a plurality of brittle characteristic sets. And dividing any one of the brittle characteristic sets according to a numerical interval in which the second movable oil content of the first shale oil samples in the any one of the brittle characteristic sets is located to obtain a plurality of shale oil sets corresponding to the any one of the brittle characteristic sets, and further obtaining a plurality of shale oil sets corresponding to the plurality of brittle characteristic sets.

In a specific example, the relationship between adsorbed oil content and brittleness index obtained by the above steps is: when the TOC of the adsorbed oil is less than 4%, the brittleness index is higher, namely the brittleness characteristics of medium and low organic matters are better, and when the TOC of the adsorbed oil is more than 4%, the brittleness index is lower, namely the brittleness characteristics of high organic matters are inferior. In this example, an adsorbed oil content interval value, namely, 4%, is obtained, and the value interval corresponding to the adsorbed oil content interval value is (0, 4%) and (4%, ++). Optionally, the technician can set two or more values of the adsorption oil content interval according to the relation between the brittleness index and the adsorption oil content, namely, subdividing the brittleness index, so that the brittleness set can be divided more accurately, and the accuracy of division is improved. For example, in the specific example described above, when 4% and 6% are set as the adsorbed oil content interval values, the value intervals corresponding to the adsorbed oil content interval values are (0, 4%), (4%, 6%) and (6%, ++), and the plurality of brittle characteristic sets are obtained by dividing the values according to the value intervals corresponding to the adsorbed oil content interval values.

Fig. 7 is a schematic diagram of a resource amount distribution diagram provided in an embodiment of the present application, fig. 7 is a resource amount distribution diagram made according to the scatter diagram of fig. 4, an abscissa of fig. 7 is an adsorbed oil content of a first sheet of a rock oil sample, an ordinate is a first movable oil content of the first sheet of the rock oil sample, a parabola can be determined according to a distribution of each point in the scatter diagram, and a distribution range of points (i.e., resource amounts) can be determined according to a second movable oil amount lower limit and the parabola, i.e., a region surrounded by the second movable oil amount lower limit and the parabola. FIG. 7 shows the second movable oil mass lower limit S _{Movable device} =0mg/g, first movable oil amount lower limit S ₁ * The shale oil of the target region is divided into 6 categories by the range value of 100mg/g, the adsorption oil content of 4%, 6% and the first movable oil content of 3mg/g and 6 mg/g. After the classification of 6 categories, the shale oil of the target region can be obtained through the comprehensive analysis of the first movable oil content and the brittleness indexDivided into 3 major classes and 8 minor classes. As shown in fig. 7, considering the first movable oil content and the brittleness index of the shale oil, since the larger the first movable oil content is, the larger the exploitation resource amount of the shale oil is, and the larger the brittleness index is (the smaller the corresponding adsorbed oil content is), the greater the exploitation resource amount of the shale oil is, i in the lower left corner of fig. 7 ₂ Class I and upper right corner ₂ Classes may be grouped into one class. In addition, the areas of shale oil address desserts are also shown in fig. 7, the areas surrounded by 6 categories in fig. 7 are real developable areas, the areas surrounded by the tangent line of the parabola and the vertical axis in fig. 7 are shale sand inclusion layers or gray cloud rocks, the tangent line of the parabola and the parabola in fig. 7 are S ₁ * The region surrounded by the line of =25 is the hydrocarbon discharge line, line S _{Movable device} The region enclosed by =0mg/g, horizontal axis and straight line toc=10 is a perspective that can be developed or modified in situ.

610. The target shale area, target shale thickness, and target second movable oil content of the plurality of shale oil collections are determined based on the shale area, shale thickness, and second movable oil content of the first shale oil sample of the plurality of shale oil collections, respectively.

611. A recoverable resource amount of the plurality of shale oil collections is determined based on the target shale area, the target shale thickness, and the target second movable oil content of the plurality of shale oil collections.

It should be noted that, the contents of steps 610 to 611 are the same as those of steps 208 to 209, and will not be described again.

According to a specific example in step 609, and steps 601-611 described above, a target shale area, a target shale thickness, a target second movable oil content, and a recoverable resource quantity for the plurality of shale oil collections are determined, as shown in table 2.

TABLE 2

For example, FIG. 8 is a schematic diagram of a planar resource amount distribution diagram according to an embodiment of the present application, FIG. 8 shows a study areaInner I ₁ 、Ⅰ ₂ 、Ⅱ ₁ 、Ⅱ ₂ 、Ⅲ ₁ 、Ⅲ ₂ A planar distribution of 6 resource quantity types. The technician can intuitively see the distribution of the resource quantity in the research area through the plane resource quantity distribution map. It should be understood that, fig. 8 illustrates the planar resource amount distribution map in the form of resource amount type labels, in fact, the planar resource amount distribution map of multiple colors can be generated, and one resource amount type corresponds to one color, so that the distribution of the resource amounts in the research area can be more intuitively embodied.

Any combination of the above optional solutions may be adopted to form an optional embodiment of the present application, which is not described herein in detail.

Fig. 9 is a schematic structural diagram of a device for predicting shale oil resource amount according to an embodiment of the present application, referring to fig. 9, the device includes:

an obtaining module 901, configured to obtain a first movable oil content and an adsorbed oil content of a plurality of first-page rock oil samples of a target region, where the first movable oil content is used to represent a total movable oil content of the first-page rock oil samples;

a movable oil content determination module 902 for determining a second movable oil content of the plurality of first sheet oil samples based on a first movable oil content and an adsorbed oil content of the plurality of first sheet oil samples, the second movable oil content being indicative of an actual movable oil content of the first sheet oil samples;

a generating module 903, configured to generate a resource quantity profile of the target region based on the second movable oil content and the adsorbed oil content of the plurality of first rock oil samples, where the resource quantity profile is the movable oil content profile of the target region;

the dividing module 904 is configured to divide the resource quantity distribution map according to a numerical interval in which the second movable oil contents of the plurality of first shale oil samples are located, so as to obtain a plurality of shale oil sets, where the second movable oil contents of the shale oil samples in the shale oil sets correspond to the same numerical interval;

A shale oil collection determination module 905 for determining a target shale area, a target shale thickness, and a target second movable oil content of the plurality of shale oil collections, respectively, based on the shale area, shale thickness, and second movable oil content of the first shale oil sample of the plurality of shale oil collections;

a recoverable resource amount determination module 906 for determining recoverable resource amounts for the plurality of shale oil collections based on the target shale area, the target shale thickness, and the target second movable oil content for the plurality of shale oil collections.

In one possible implementation manner, the pyrolysis oil content of the first rock oil samples is obtained by thermal decomposition of the first rock oil samples, and the device further comprises a correction module, which is used for correcting the pyrolysis oil content of the first rock oil samples based on a free oil correction coefficient, so as to obtain a first movable oil content of the first rock oil samples, wherein the free oil correction coefficient is used for compensating the loss content of free oil in the pyrolysis oil.

In one possible implementation, the apparatus further includes:

In a possible implementation manner, the movable oil content determining module 902 is configured to determine the second movable oil content of the first plurality of rock oil samples based on the first movable oil content, the adsorbed oil content, and a unit adsorption coefficient corresponding to the adsorbed oil content, where the unit adsorption coefficient is used to indicate a content capable of adsorbing the movable oil per unit mass of the adsorbed oil.

In one possible implementation, the generating module 903 includes:

In one possible implementation, the apparatus further includes:

In one possible implementation, the recoverable resource amount determining module 906 is configured to determine, as the recoverable resource amount of the plurality of shale oil sets, a product of the target shale area, the target shale thickness, the target second movable oil content, and the shale density of the target zone.

In one possible implementation, the apparatus further includes:

the volume content acquisition module is used for acquiring the volume content of a plurality of minerals in the first rock oil samples based on the first rock oil samples of the target region, wherein the minerals comprise at least one of quartz, feldspar, dolomite, calcite and zeolite;

In a possible implementation manner, the partitioning module 904 is further configured to partition, in the resource quantity distribution map of the target region, based on the second movable oil content, the adsorbed oil content, and the brittleness index of the first plurality of rock oil samples, to obtain a plurality of shale oil sets.

It should be noted that: the device for predicting the shale oil resource amount provided in the above embodiment only illustrates the division of the above functional modules when predicting the shale oil resource amount, and in practical application, the above functional allocation may be completed by different functional modules according to needs, that is, the internal structure of the terminal is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the device for predicting the shale oil resource amount provided in the above embodiment belongs to the same concept as the method embodiment for predicting the shale oil resource amount, and the specific implementation process is detailed in the method embodiment, which is not described herein again.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.

Claims

1. A method for predicting shale oil resource quantity, the method comprising:

Determining a target shale area, a target shale thickness, and a target second movable oil content of the plurality of shale oil collections, respectively, based on the shale area, the shale thickness, and the second movable oil content of a first shale oil sample of the plurality of shale oil collections;

determining a recoverable resource quantity of the plurality of shale oil collections based on the target shale area, the target shale thickness, and the target second movable oil content of the plurality of shale oil collections;

wherein generating the resource amount profile of the target zone based on the second movable oil content and the adsorbed oil content of the plurality of first sheet rock oil samples comprises:

determining a first corresponding relation between the second movable oil content and the adsorbed oil content based on the second movable oil content and the adsorbed oil content of the plurality of third shale oil samples, and generating a planar resource quantity distribution map of the target region, wherein the planar resource quantity distribution map is a movable oil content distribution map of the target region on a plane;

and determining a second corresponding relation between the second movable oil content and the adsorbed oil content based on the second movable oil content and the adsorbed oil content of the fourth shale oil samples, and generating a profile resource quantity distribution map of the target region, wherein the profile resource quantity distribution map is a movable oil content distribution map of the target region on a profile.

2. The method of claim 1, wherein the obtaining of the first movable oil content of the plurality of first sheet oil samples comprises:

performing thermal decomposition on the plurality of first shale oil samples to obtain pyrolysis oil content of the plurality of first shale oil samples;

3. The method of claim 2, wherein the process of obtaining the free oil correction factor comprises:

4. The method of claim 1, wherein the determining a second movable oil content of the plurality of first shale oil samples based on the first movable oil content and the adsorbed oil content of the plurality of first shale oil samples comprises:

And determining the second movable oil content of the first plurality of rock oil samples based on the first movable oil content, the adsorbed oil content and the unit adsorption coefficient corresponding to the adsorbed oil content of the first plurality of rock oil samples, wherein the unit adsorption coefficient is used for representing the content of the adsorbed oil capable of adsorbing the movable oil in unit mass.

5. The method of claim 1, wherein the determining of the target shale area comprises:

based on the plane resource quantity distribution diagram of the target region, respectively determining a plurality of first shale oil samples belonging to the same plane in the shale oil sets;

6. The method of claim 1, wherein the determining of the target shale thickness comprises:

7. The method of claim 1, wherein in the resource quantity profile, the method further comprises, prior to dividing the resource quantity profile by a numerical interval in which the second movable oil content of the plurality of first shale oil samples is located, obtaining a plurality of shale oil collections:

determining a friability index of the plurality of first sheet rock oil samples based on the volume content of the plurality of minerals, the friability coefficient of the plurality of minerals, and the total volume of the plurality of first sheet rock oil samples, the friability index being indicative of the rock friability of the first sheet rock oil samples;

in the resource quantity distribution diagram, dividing according to a numerical interval where the second movable oil content of the first shale oil samples is located, and obtaining the shale oil sets includes:

and in the resource quantity distribution diagram of the target region, dividing the resource quantity distribution diagram based on the second movable oil content, the adsorbed oil content and the brittleness index of the first rock oil samples to obtain a plurality of shale oil sets.

8. A shale oil resource amount prediction apparatus, the apparatus comprising:

a movable oil content determination module for determining a second movable oil content of the plurality of first sheet oil samples based on a first movable oil content and an adsorbed oil content of the plurality of first sheet oil samples, the second movable oil content being indicative of an actual movable oil content of the first sheet oil samples;

the dividing module is used for dividing the resource quantity distribution diagram according to the numerical intervals of the second movable oil contents of the first shale oil samples to obtain a plurality of shale oil sets, wherein the second movable oil contents of the shale oil samples in the shale oil sets correspond to the same numerical interval;

The shale oil set determining module is used for respectively determining target shale areas, target shale thicknesses and target second movable oil contents of the plurality of shale oil sets based on shale areas, shale thicknesses and second movable oil contents of first shale oil samples in the plurality of shale oil sets;

a recoverable resource amount determination module for determining recoverable resource amounts of the plurality of shale oil collections based on the target shale area, the target shale thickness, and the target second movable oil content of the plurality of shale oil collections;

wherein, the generating module includes:

The generation submodule is used for determining a second corresponding relation between the second movable oil content and the adsorbed oil content based on the second movable oil content and the adsorbed oil content of the fourth shale oil samples, and generating a profile resource quantity distribution map of the target region, wherein the profile resource quantity distribution map is a movable oil content distribution map of the target region on a profile.