Method and device for determining oil and gas resource quantity of broken basin

Abstract

The invention provides a method and a device for determining the oil and gas resource quantity of a broken basin. The method for determining the oil and gas resource quantity of the broken basin comprises the following steps: acquiring geometric characterization parameters of a target broken basin; wherein the geometric characterization parameters comprise the sunken area of the broken basin, the length on the plane, the width and the buried depth of the base; determining the petroleum resource quantity of the target broken basin according to the geometric representation parameters of the target broken basin and a pre-generated petroleum resource abundance calculation model; wherein the petroleum resource abundance calculation model is generated according to the length, the width, the base burying depth and the petroleum resource quantity on at least one other broken basin ground plane. According to the method, an effective method is provided for resource potential comparison among the fault basins with extremely low exploration degree, the defects in oil-gas exploration planning research are overcome, and the scientificity and the guiding effect of oil-gas exploration planning are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil and gas exploration, and particularly relates to a method and device for determining oil and gas resource quantity of a faulted basin. BACKGROUND

[0002] An important basic work in long-term planning research of oil and gas exploration is to compare resource quantity and resource abundance between different basins, and then according to the current exploration stage, through comprehensive research, to propose planning indexes such as proven reserves.

[0003] The patent application with the publication number CN109979005A discloses a physical simulation research method and device for faulted basin fan-shaped structure causes, and belongs to the technical field of physical simulation research of faulted basin fan-shaped structure causes. The method determines the evolution process of the fan-shaped structure by analyzing the spatial distribution, structural constraint and superposition, structural activity intensity and activity stage, and base structure distribution and activity characteristics of the faulted basin fan-shaped structure, and realizes the reproduction process of the fan-shaped structure under the extensional dynamic force through the approximation principle. Finally, the similarity and difference between the simulation experiment results and the examples are compared to determine the genetic mechanism of the fan-shaped structure development under the extensional stretching background. The geological elements of the fan-shaped structure development under the extensional stretching dynamic condition are reasonably represented, which provides a new research idea and technical means for the evolution process of the faulted basin fan-shaped structure. The fault activity characteristics and activity period are moved to the fan-shaped structure development causes, which improves the simulation experiment of the faulted basin fan-shaped structure.

[0004] The patent application with the publication number CN108490484A provides a method for dissecting a mature exploration area reserve blank area of a faulted basin, which includes: predicting remaining resource potential according to a geological Pareto probability model; predicting possible reservoir types according to reservoir distribution order; establishing a fine geological model based on seismic inversion dissection of exploration wells and development wells; combining evaluation of reservoir-forming conditions to determine reservoir enrichment elements; analyzing failure wells by positive and negative comparison to determine the reasons for reserve blank; establishing key technologies for exploring the blank area through targeted research; and coupling and quantitatively describing trap and reservoir elements to predict favorable exploration targets. The method for dissecting the reserve blank area of the mature exploration area of the faulted basin solves the problem of fine exploration of the reserve blank area, and has strong operability. Meanwhile, the method provides a basis for predicting favorable targets in the blank area.

[0005] For an oil and gas basin with extremely low exploration degree and which has not carried out resource evaluation, the above-mentioned comparative analysis work cannot be carried out, so it is difficult to provide planning basis, which affects the guiding role of oil and gas exploration planning. SUMMARY

[0006] An object of the present application is to provide a method for determining the oil and gas resource quantity of a rift basin. The present application conforms to the oil and gas geological rules of a rift basin, and a method for characterizing the oil and gas resource quantity of a rift basin by geometric parameters is established accordingly, which provides an effective technical method for comparing the resource potential between rift basins with extremely low exploration degrees, makes up for the deficiency in oil and gas exploration planning research, and improves the scientificity and guidance of oil and gas exploration planning.

[0007] Another object of the present application is to provide a device for determining the oil and gas resource quantity of a rift basin. Still another object of the present application is to provide an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method for determining the oil and gas resource quantity of a rift basin when executing the computer program. Still another object of the present application is to provide a readable medium having a computer program stored thereon, and the computer program implements the steps of the method for determining the oil and gas resource quantity of a rift basin when executed by a processor.

[0008] To solve the technical problems in the background art, the present application provides the following technical solutions.

[0009] In a first aspect, the present application provides a method for determining the oil and gas resource quantity of a rift basin, comprising:

[0010] obtaining geometric characterization parameters of a target rift basin; wherein the geometric characterization parameters comprise the concave area, length, width, and base burial depth of the rift basin;

[0011] determining the oil resource quantity of the target rift basin according to the geometric characterization parameters of the target rift basin and a pre-generated oil resource abundance calculation model; wherein the oil resource abundance calculation model is generated according to the length, width, base burial depth, and oil resource quantity of at least one other rift basin.

[0012] In some embodiments of the present application, the step of generating the oil resource abundance calculation model comprises:

[0013] generating concave geometric parameters of the other rift basin according to the geometric characterization parameters of the at least one other rift basin;

[0014] determining the oil geological resource abundance of the other rift basin according to the oil resource quantity and concave area of the other rift basin;

[0015] generating the oil resource abundance calculation model according to the concave geometric parameters of the other rift basin and the oil geological resource abundance of the other rift basin.

[0016] In some embodiments of the present application, the oil resource quantity of the target rift basin is determined according to the geometric characterization parameters of the target rift basin and a pre-generated oil resource abundance calculation model, comprising:

[0017] The oil resource abundance of the target rift basin is determined according to the length, width, and base burial depth on the plane of the target rift basin and the oil resource abundance calculation model.

[0018] The oil resource quantity of the target rift basin is determined according to the concave area of the target rift basin and the oil resource abundance of the target rift basin.

[0019] In some embodiments of the present application, the oil resource abundance of the target rift basin is determined according to the length, width, and base burial depth on the plane of the target rift basin and the oil resource abundance calculation model, comprising:

[0020] The concave geometric parameters of the target rift basin are determined according to the length, width, and base burial depth on the plane of the target rift basin.

[0021] The oil resource abundance of the target rift basin is determined according to the concave geometric parameters of the target rift basin and the oil resource abundance calculation model.

[0022] In some embodiments of the present application, the concave geometric parameters of the other rift basin are generated according to the geometric characterization parameters of the at least one other rift basin, comprising:

[0023] The concave geometric parameters of the other rift basin are generated according to the length, width, and base burial depth on the plane of the other rift basin.

[0024] In some embodiments of the present application, the concave geometric parameters of the other rift basin are generated according to the length, width, and base burial depth on the plane of the other rift basin, comprising:

[0025] The concave geometric parameters = the length on the plane / (the width on the plane × the base burial depth).

[0026] In some embodiments of the present application, the oil resource abundance calculation model is generated according to the concave geometric parameters of the other rift basin and the oil geology resource abundance of the other rift basin, comprising:

[0027] In a two-dimensional coordinate system, the concave geometric parameters of the other rift basin and the oil geology resource abundance of the other rift basin are fitted to generate the oil resource abundance calculation model.

[0028] In a second aspect, the present application provides a device for determining oil and gas resource quantity of a rift basin, comprising:

[0029] a geometric parameter acquisition module, configured to acquire geometric parameters of the target rift basin, wherein the geometric parameters comprise a concave area, a length, a width, and a buried depth of the target rift basin;

[0030] an oil resource quantity determination module, configured to determine the oil resource quantity of the target rift basin according to the geometric parameters of the target rift basin and a pre-generated oil resource abundance calculation model, wherein the oil resource abundance calculation model is generated according to the length, the width, the buried depth, and the oil resource quantity of at least one other rift basin.

[0031] In some embodiments of the present application, a device for determining oil and gas resource quantity of a rift basin further comprises:

[0032] an abundance calculation model generation module, configured to generate the oil resource abundance calculation model, wherein the abundance calculation model generation module comprises:

[0033] a geometric parameter generation unit, configured to generate geometric parameters of the at least one other rift basin according to the geometric parameters of the at least one other rift basin;

[0034] a resource abundance determination unit, configured to determine oil and gas resource abundance of the at least one other rift basin according to the oil resource quantity and the concave area of the at least one other rift basin;

[0035] an abundance calculation model generation unit, configured to generate the oil resource abundance calculation model according to the geometric parameters of the at least one other rift basin and the oil and gas resource abundance of the at least one other rift basin.

[0036] In some embodiments of the present application, the oil resource quantity determination module comprises:

[0037] a target resource abundance determination unit, configured to determine oil resource abundance of the target rift basin according to the length, the width, the buried depth, and the oil resource abundance calculation model of the target rift basin;

[0038] an oil resource quantity determination unit, configured to determine the oil resource quantity of the target rift basin according to the concave area and the oil resource abundance of the target rift basin.

[0039] In some embodiments of the present application, the target resource abundance determination unit comprises:

[0040] The target morphological parameter determination unit is configured to determine the depression geometric morphological parameter of the target rift basin according to the length, the width, and the basement burial depth on the plane of the target rift basin.

[0041] The target resource abundance determination sub-unit is configured to determine the petroleum resource abundance of the target rift basin according to the depression geometric morphological parameter of the target rift basin and a petroleum resource abundance calculation model.

[0042] In some embodiments of the present application, the other morphological parameter generation unit comprises:

[0043] The other morphological parameter generation sub-unit is configured to generate the depression geometric morphological parameter of the other rift basin according to the length, the width, and the basement burial depth on the plane of the other rift basin.

[0044] In some embodiments of the present application, the other morphological parameter generation sub-unit is configured to:

[0045] The depression geometric morphological parameter = the length on the plane / (the width on the plane x the basement burial depth).

[0046] In some embodiments of the present application, the abundance calculation model generation unit comprises:

[0047] The abundance calculation model generation sub-unit is configured to fit the depression geometric morphological parameter of the other rift basin and the petroleum geological resource abundance of the other rift basin in a two-dimensional coordinate system to generate the petroleum resource abundance calculation model.

[0048] In a third aspect, the present application provides a computer program product, comprising computer programs / instructions, which, when executed by a processor, implement the steps of the method for determining the oil and gas resource amount of a rift basin.

[0049] In a fourth aspect, the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for determining the oil and gas resource amount of a rift basin when executing the program.

[0050] In a fifth aspect, the present application provides a computer-readable storage medium, which stores a computer program, wherein the computer program, when executed by a processor, implements the steps of the method for determining the oil and gas resource amount of a rift basin.

[0051] As can be known from the above description, the embodiment of the present application provides a method and device for determining the oil and gas resource quantity of a faulted basin, and the method for determining the oil and gas resource quantity of the corresponding faulted basin comprises the following steps: firstly, acquiring the geometric characteristic parameters of the target faulted basin; wherein the geometric characteristic parameters comprise the concave area, the length on the plane, the width, and the buried depth of the base of the faulted basin; and finally, determining the oil resource quantity of the target faulted basin according to the geometric characteristic parameters of the target faulted basin and a pre-generated oil resource abundance calculation model; wherein the oil resource abundance calculation model is generated according to the length on the plane, the width, the buried depth of the base, and the oil resource quantity of at least one other faulted basin.

[0052] The device for determining the oil and gas resource quantity of the corresponding faulted basin comprises: a set characteristic parameter acquisition module, which is used for acquiring the geometric characteristic parameters of the target faulted basin; wherein the geometric characteristic parameters comprise the concave area, the length on the plane, the width, and the buried depth of the base of the faulted basin; and an oil resource quantity determination module, which is used for determining the oil resource quantity of the target faulted basin according to the geometric characteristic parameters of the target faulted basin and a pre-generated oil resource abundance calculation model; wherein the oil resource abundance calculation model is generated according to the length on the plane, the width, the buried depth of the base, and the oil resource quantity of at least one other faulted basin.

[0053] The present application establishes a method for characterizing the oil and gas resource quantity of a faulted basin by using geometric shape parameters, so as to lay a foundation for the research and preparation of long-term planning in oil and gas exploration. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0055] Figure 1 FIG. 1 is a flowchart of a method for determining the oil and gas resource quantity of a faulted basin according to an embodiment of the present application;

[0056] Figure 2 FIG. 2 is a graph showing the relationship between the length-width ratio and the oil resource abundance of a faulted basin in eastern China according to an embodiment of the present application;

[0057] Figure 3 FIG. 3 is another flowchart of a method for determining the oil and gas resource quantity of a faulted basin according to an embodiment of the present application;

[0058] Figure 4 FIG. 4 is a flowchart of step 300 of a method for determining the oil and gas resource quantity of a faulted basin according to an embodiment of the present application;

[0059] Figure 5 A flowchart of step 200 of the method for determining the oil and gas resource quantity of a faulted basin in an embodiment of the present application;

[0060] Figure 6 A flowchart of step 201 of the method for determining the oil and gas resource quantity of a faulted basin in an embodiment of the present application;

[0061] Figure 7 A graph of the relationship between the geometric characteristic parameters and the oil resource abundance of the faulted basins in eastern China in an embodiment of the present application;

[0062] Figure 8 A flowchart of the method for determining the oil and gas resource quantity of a faulted basin in a specific embodiment of the present application;

[0063] Figure 9 A logic diagram of the method for determining the oil and gas resource quantity of a faulted basin in a specific embodiment of the present application;

[0064] Figure 10 A graph of the relationship between the sagging length-depth ratio and the oil resource abundance of the faulted basins in eastern China in a specific embodiment of the present application;

[0065] Figure 11 A graph of the fitting precision analysis of the oil resource quantity of the faulted basins in eastern China in a specific embodiment of the present application;

[0066] Figure 12 A block diagram of the device for determining the oil and gas resource quantity of a faulted basin in an embodiment of the present application;

[0067] Figure 13 A structural diagram of the electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0068] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0069] Those skilled in the art will appreciate that embodiments of the application can be provided as methods, systems, or computer program products. Accordingly, the application can be embodied in the form of entire hardware embodiments, entire software embodiments, or embodiments combining software and hardware aspects. Furthermore, the application can be embodied in the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk memory, CD-ROMs, optical memory, etc.) having computer usable program code embodied thereon.

[0070] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification and in the claims and the above description of the drawings are intended to cover both the exclusive and the non-exclusive inclusion of the steps or elements listed, such that the processes, methods, systems, products or devices that comprise or have the listed steps or elements do not have to include all of them, but can include only those that are clearly listed, or only those that are inherent to these processes, methods, products or devices. The embodiments and features of the embodiments in the present application can be combined with each other, provided that there is no conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0071] In the technical solutions of the present application, the acquisition, storage, use, processing, etc. of data comply with relevant provisions of laws and regulations.

[0072] Embodiment one:

[0073] The embodiments of the present application provide a specific implementation of a method for determining the oil and gas resource quantity of a rift basin, referring to Figure 1 , and specifically comprising the following contents:

[0074] Step 100: Obtain the geometric characterization parameters of the target rift basin; wherein the geometric characterization parameters include the concave area, length on the plane, width, and base burial depth of the rift basin.

[0075] Step 200: Determine the oil resource quantity of the target rift basin according to the geometric characterization parameters of the target rift basin and a pre-generated oil resource abundance calculation model; wherein the oil resource abundance calculation model is generated according to the length on the plane, width, base burial depth, and oil resource quantity of at least one other rift basin.

[0076] From the above description, the embodiment of the present application provides a method for determining the oil and gas resource quantity of a rift basin, comprising: first, obtaining the geometric characterization parameters of the target rift basin; wherein the geometric characterization parameters include the concave area, the length on the plane, the width, and the basement burial depth of the rift basin; and finally, determining the oil resource quantity of the target rift basin according to the geometric characterization parameters of the target rift basin and a pre-generated oil resource abundance calculation model; wherein the oil resource abundance calculation model is generated according to the length on the plane, the width, and the basement burial depth of at least one other rift basin and the oil resource quantity.

[0077] The present application uses geometric parameters to establish a method for characterizing the oil and gas resource quantity of a rift basin, thereby laying a foundation for the research and preparation of long-term planning in oil and gas exploration.

[0078] Embodiment two:

[0079] For step 100, a rift basin is formed under the action of crustal extension or stretching, and is bounded by a series of parallel faults, and the middle block sinks to form a basin. This extension is caused by the relative movement between the crustal plates or the upward flow of the mantle to the crust.

[0080] During the development of the rift basin, the crust is stretched, causing the rocks on it to break and move along the faults. Faults usually occur in pairs, forming along the two edges of the basin, causing the middle block to drop relative to the edge block, thereby forming a lower area. The rift basin can be narrow and long, or a relatively wide area, with a length ranging from tens of kilometers to hundreds of kilometers.

[0081] The sediments in the rift basin are very rich because the low-lying area is easy to accumulate sediments eroded from highlands. Over time, these sediments can accumulate into sedimentary layers with considerable thickness.

[0082] Step 100 can be performed by obtaining the area of the concave area, the length on the plane, the width, the basement burial depth (i.e. the thickness of the sedimentary strata), and the oil and gas geological resource quantity through geological industry mapping, oil and gas resource evaluation, etc., and unifying the units of measurement of each parameter.

[0083] For step 200, oil resource abundance refers to the richness of oil in a certain area, which is usually closely related to geological features, historical depositional environment, input of organic matter, preservation conditions, and later geological processes in the area. Specifically:

[0084] Source rock: Sedimentary rock (such as shale and mudstone) rich in organic matter can produce oil and gas under certain temperature and pressure. The type of source rock, the type and content of organic matter are one of the key factors determining the oil resource abundance.

[0085] Maturity: Organic matter must be subjected to appropriate temperature and pressure to be converted into petroleum. This process, called pyrolysis, occurs at depths of thousands of meters underground, as the depth and temperature of the formation increase.

[0086] Migration and trapping: The formed petroleum needs to migrate to geological structures that can store oil and gas, such as traps such as faults, folds, unconformities, and salt domes.

[0087] Preservation conditions: If the formation where the oil and gas reservoir is located is not destroyed by subsequent geological processes, such as excessive formation dip, fracture development, etc., the oil and gas can be well preserved.

[0088] See Figure 2 , statistics of 36 depressions in 6 faulted basins in eastern China (Note: In faulted basins, the first structural unit is the basin, the second structural unit is the depression, and the third structural unit is the depression; With the continuous deepening and refinement of exploration, in actual work, the depressions in faulted basins are also called faulted basins), it is found that the ratio of the length and width of the depression and the oil resource abundance of the depression show a clear negative correlation, that is, the larger the value of length / width, the smaller the resource abundance. The ratio of the length and depth of the depression and the oil resource abundance of the depression also show a clear negative correlation, that is, the larger the value of length / depth, the smaller the resource abundance.

[0089] As can be seen, the length, width, and depth of the faulted basin, which represent the geometry of the depression, can also be used to represent the resource status of the depression. The geological law reflected by this understanding is that in the plane, the longer and narrower the faulted basin, the smaller the area of the lake basin water body, and the less conducive to the aggregation of organic matter and organisms that generate oil and gas; In the vertical direction, the shallower the faulted basin is buried, the thinner the sedimentary strata, and the lower the degree of thermal evolution of organic matter, the less the total amount of oil and gas generated. Therefore, the length, width, and depth of the depression in the faulted basin, which represent the geometry of the depression, can be used to establish a method for representing the amount of oil and gas resources in the faulted basin through certain parameter combinations (oil resource abundance calculation model).

[0090] In some embodiments of the present application, see Figure 3 A method for determining the amount of oil and gas resources in a faulted basin, further comprising:

[0091] Step 300: generating the oil resource abundance calculation model, see Figure 4 Step 300 includes:

[0092] Step 301: generating the depression geometry parameter of the other faulted basin according to the geometry representation parameter of the at least one other faulted basin;

[0093] Specifically, the length, width, and depth parameters are combined to form the geometry parameter of the depression:

[0094] recess geometry parameter = length / (width x depth)

[0095] wherein the parameter measurement units are: length: km. width: km. depth: km. recess geometry parameter: dimensionless.

[0096] Step 302: determining the petroleum geologic resource abundance of the other rift basin according to the petroleum resource amount of the other rift basin and the recess area of the other rift basin;

[0097] Specifically, the geologic resource abundance of the recess is calculated by using the two parameters of the petroleum geologic resource amount and the recess area:

[0098] petroleum geologic resource abundance = petroleum geologic resource amount / recess area

[0099] Step 303: generating the petroleum resource abundance calculation model according to the recess geometry parameter of the other rift basin and the petroleum geologic resource abundance of the other rift basin.

[0100] In some embodiments of the present application, referring to Figure 5 , step 200 comprises:

[0101] Step 201: determining the petroleum resource abundance of the target rift basin according to the length, width, base burial depth on the plane of the target rift basin and the petroleum resource abundance calculation model;

[0102] Specifically, first, the geometry parameter of the target rift basin is generated according to the length, width, base burial depth on the plane of the target rift basin:

[0103] recess geometry parameter = length / (width x depth)

[0104] Then, the geometry parameter of the target rift basin is substituted into the petroleum resource abundance calculation model to generate the petroleum resource abundance of the target rift basin.

[0105] Step 202: determining the petroleum resource amount of the target rift basin according to the recess area of the target rift basin and the petroleum resource abundance of the target rift basin.

[0106] Specifically, the petroleum resource amount of the target rift basin is determined by multiplying the recess area of the target rift basin by the petroleum resource abundance of the target recess basin.

[0107] In some embodiments of the present application, referring to Figure 6 , step 201 comprises:

[0108] Step 2011: determining the depression geometry parameter of the target rift basin according to the length, width and base burial depth on the plane of the target rift basin;

[0109] Step 2012: determining the oil resource abundance of the target rift basin according to the depression geometry parameter of the target rift basin and the oil resource abundance calculation model.

[0110] In some embodiments of the present application, step 301 comprises:

[0111] generating the depression geometry parameter of the other rift basin according to the length, width and base burial depth on the plane of the other rift basin.

[0112] In some embodiments of the present application, step 3011 can be implemented according to the following formula:

[0113] depression geometry parameter = length on the plane / (width on the plane x base burial depth).

[0114] In some embodiments of the present application, step 303 comprises:

[0115] fitting the depression geometry parameter of the other rift basin and the oil geological resource abundance of the other rift basin in a two-dimensional coordinate system to generate the oil resource abundance calculation model.

[0116] Specifically, in a two-dimensional coordinate system, the depression geometry parameter is taken as the horizontal coordinate and the oil and gas geological resource abundance is taken as the vertical coordinate, and a relationship chart can be established. For example, for 36 depressions in 6 rift basins in eastern China, a good power function relationship is presented between them, as shown in Figure 7 The relationship is:

[0117] oil geological resource abundance = 6.4477 x depression geometry parameter -1.588

[0118] The method for determining the oil and gas resource amount of a rift basin provided by the embodiments of the present application establishes a model between the length, width, depth and other parameters representing the depression geometry characteristics of the rift basin and the oil and gas geological resource abundance. The data of 36 depressions in 6 rift basins in eastern China are verified, and the multiple correlation coefficient reaches 0.861, which indicates that the mathematical relationship has strong correlation. For the 36 rifts, the relative error between the calculated oil geological resource amount and the resource evaluation result is 37.6%, which indicates that the present application has good reliability.

[0119] The method for determining the amount of oil and gas resources in a rift basin provided by this invention not only follows the oil and gas geological laws of rift basins, but also provides an effective technical method for comparing the resource potential between rift basins with very low exploration levels. It makes up for the deficiencies in oil and gas exploration planning and research, and improves the scientific nature and guiding role of oil and gas exploration planning.

[0120] Example 3:

[0121] In one specific embodiment, the present invention also provides a specific implementation of a method for determining the oil and gas resources of a rift basin, see [link to implementation details]. Figure 8 as well as Figure 9 Specifically, it includes the following steps.

[0122] The method proposed in this invention for characterizing the oil and gas resources of rift basins using geometric morphology parameters is based on the statistical results of a large number of rift basins in eastern China, which found that there is a good mathematical relationship between the geometric morphology of rift basins and their resource abundance.

[0123] like Figure 2 As shown, this invention statistically analyzed 36 depressions in six rift basins in eastern China and found a clear negative correlation between the ratio of depression length to width and the abundance of oil resources in the depression; that is, the larger the length / width ratio, the lower the resource abundance. Figure 10 As shown, the ratio of depression length to depth also shows a clear negative correlation with the abundance of oil resources in the depression, that is, the larger the length / depth value, the smaller the resource abundance.

[0124] Therefore, the length, width, and depth that characterize the geometry of a rift basin can also be used to characterize its resource status. This understanding reflects the geological principle that, in plan view, the narrower and longer the rift basin, the smaller the lake basin area, which is less conducive to the accumulation of organic matter and organisms that generate oil and gas; vertically, the shallower the rift basement, the thinner the sedimentary strata, the lower the degree of thermal evolution of organic matter, and the less oil and gas is generated.

[0125] Therefore, it can be seen that the length, width, and depth of the depression geometry in the rift basin are related to the amount of oil and gas resources in the rift basin. Thus, by combining certain parameters, a method can be established to characterize the amount of oil and gas resources in the rift basin.

[0126] Step S1: Determine the basic parameters of the depression in the rift basin.

[0127] Using methods such as geological industrial mapping and oil and gas resource assessment, five parameters were obtained: the area of ​​the depression, its length and width in plan view, the burial depth of the basement (i.e., the thickness of the sedimentary strata), and the amount of oil and gas geological resources. The units of measurement for each parameter were standardized. The basic parameters of the depression in the rift basin are shown in Table 1.

[0128] Table 1 Basic parameters of main faulted basins in eastern China

[0129]

[0130]

[0131]

[0132] Step S2: Calculating the geological resource abundance of the depression in the faulted basin.

[0133] Specifically, the geological resource abundance of the depression is calculated by using the oil and gas geological resource amount and the depression area.

[0134] Oil and gas geological resource abundance = oil and gas geological resource amount / depression area

[0135] Wherein, the measurement units of the parameters are as follows: oil and gas geological resource amount: petroleum - ten thousand tons, natural gas - hundred million cubic meters; depression area: square kilometers; oil and gas geological resource abundance: petroleum - ten thousand tons / square kilometers, natural gas - hundred million cubic meters / square kilometers. The calculation results of the geological resource abundance and the geometric shape parameters of the main faulted basins in eastern China are shown in Table 2.

[0136] Table 2 Calculation results of geological resource abundance and geometric shape parameters of main faulted basins in eastern China

[0137]

[0138]

[0139] Step S3: Calculating the geometric shape parameters of the depression in the faulted basin.

[0140] The geometric shape parameters of the depression are calculated by using the length, width and depth.

[0141] Depression geometric shape parameter = length / (width x depth)

[0142] Wherein, the measurement units of the parameters are as follows: length: kilometers; width: kilometers; depth: kilometers; depression geometric shape parameter: dimensionless.

[0143] Step S4: Generating a calculation model of petroleum resource abundance.

[0144] Specifically, a mathematical relationship between the geometric shape parameters of the depression in the faulted basin and the oil and gas geological resource abundance is established.

[0145] In a two-dimensional coordinate system, the relationship between the concave geometry parameters and the oil and gas geological resource abundance can be established. For example, in the 36 concaves in the 6 faulted basins in the east of China, the relationship between the two is a good power function, as shown in Figure 7 The oil resource abundance calculation model is:

[0146] Oil geological resource abundance = 6.4477 x faulted geometry characteristic parameter -1.588

[0147] Step S5: obtaining the oil and gas resource amount of the faulted basin.

[0148] For example, in the faulted basins in the east of China, the length, width and depth of the concave are obtained through geological industrial mapping, and the oil geological resource abundance of the concave can be obtained by using the relationship established in step 4, and then the oil resource amount of the concave can be obtained by multiplying the concave area, as shown in Table 3.

[0149] Table 3 Error analysis table of calculation results of oil geological resources in main faulted basins in the east of China

[0150]

[0151]

[0152] Step S6: effect verification.

[0153] By comparing the calculation results and the resource evaluation results, the average relative error of the oil geological resource amount of the 36 concaves is 37.6%, which can meet the accuracy requirement of oil and gas exploration planning research, as shown in Table 3, Figure 11 .

[0154] As can be seen from the above description, the embodiment of the present application provides a method for determining the oil and gas resource amount of a faulted basin, based on the statistical analysis of the faulted basins in the east of China, first, the oil and gas geological resource abundance of the concave in the faulted basin is obtained, and the length, width and depth of the concave are used to form the geometric characteristic parameter (length / (width x depth)) of the concave; secondly, in a two-dimensional coordinate system, the faulted geometric characteristic parameter is used as the horizontal coordinate, and the oil and gas geological resource abundance is used as the vertical coordinate, and a mathematical relationship for obtaining the oil and gas geological resource abundance of the concave by using the faulted geometric characteristic parameter is fitted; thirdly, the oil and gas resource abundance of the concave is obtained by using the mathematical relationship, and then the oil and gas geological resource amount of the concave can be obtained by multiplying the concave area.

[0155] The method for determining the oil and gas resource quantity of a faulted basin provided by the embodiment of the present application conforms to the oil and gas geological law of the faulted basin, and a method for representing the oil and gas resource quantity of the faulted basin by using geometric parameters is established, which provides an effective technical method for comparing the resource potential between faulted basins with extremely low exploration degree, makes up for the deficiency in the oil and gas exploration planning research, and improves the scientificity and guidance of the oil and gas exploration planning.

[0156] Embodiment four:

[0157] Based on the same inventive concept, the embodiment of the present application further provides a device for determining the oil and gas resource quantity of a faulted basin, which can be used to realize the method described in the above embodiments, as follows. Since the device for determining the oil and gas resource quantity of a faulted basin solves the problem by the similar principle as the method for determining the oil and gas resource quantity of a faulted basin, the implementation of the device for determining the oil and gas resource quantity of a faulted basin can be referred to the implementation of the method for determining the oil and gas resource quantity of a faulted basin, and the repeated parts will not be described herein. The term "unit" or "module" used below can be a combination of software and / or hardware that realizes the predetermined function. Although the system described in the following embodiments is preferably realized by software, the realization by hardware or the combination of software and hardware is also possible and conceived.

[0158] The embodiment of the present application provides a specific implementation of a device for determining the oil and gas resource quantity of a faulted basin, which can realize the method for determining the oil and gas resource quantity of a faulted basin, as follows. Figure 12 The device for determining the oil and gas resource quantity of a faulted basin comprises:

[0159] A geometric representation parameter acquisition module 10 is configured to acquire geometric representation parameters of a target faulted basin, wherein the geometric representation parameters comprise a concave area, a length on a plane, a width, and a buried depth of a basement of the faulted basin.

[0160] An oil resource quantity determination module 20 is configured to determine an oil resource quantity of the target faulted basin according to the geometric representation parameters of the target faulted basin and a pre-generated oil resource abundance calculation model, wherein the oil resource abundance calculation model is generated according to the length on the plane, the width, the buried depth of the basement, and the oil resource quantity of at least one other faulted basin.

[0161] In some embodiments of the present application, the device for determining the oil and gas resource quantity of a faulted basin further comprises:

[0162] An abundance calculation model generation module is configured to generate the oil resource abundance calculation model, and the abundance calculation model generation module comprises:

[0163] a further morphological parameter generation unit configured to generate a depression geometric morphological parameter of the further rift basin according to the geometric characterization parameter of the at least one further rift basin;

[0164] a further resource abundance determination unit configured to determine a petroleum geology resource abundance of the further rift basin according to the petroleum resource quantity and the depression area of the further rift basin;

[0165] an abundance calculation model generation unit configured to generate the petroleum resource abundance calculation model according to the depression geometric morphological parameter of the further rift basin and the petroleum geology resource abundance of the further rift basin.

[0166] In some embodiments of the present application, the petroleum resource quantity determination module comprises:

[0167] a target resource abundance determination unit configured to determine a petroleum resource abundance of the target rift basin according to the length, the width, the basement burial depth on the plane of the target rift basin and the petroleum resource abundance calculation model;

[0168] a petroleum resource quantity determination unit configured to determine a petroleum resource quantity of the target rift basin according to the depression area of the target rift basin and the petroleum resource abundance of the target rift basin.

[0169] In some embodiments of the present application, the target resource abundance determination unit comprises:

[0170] a target morphological parameter determination unit configured to determine a depression geometric morphological parameter of the target rift basin according to the length, the width, the basement burial depth on the plane of the target rift basin;

[0171] a target resource abundance determination sub-unit configured to determine a petroleum resource abundance of the target rift basin according to the depression geometric morphological parameter of the target rift basin and the petroleum resource abundance calculation model.

[0172] In some embodiments of the present application, the further morphological parameter generation unit comprises:

[0173] a further morphological parameter generation sub-unit configured to generate a depression geometric morphological parameter of the further rift basin according to the length, the width, the basement burial depth on the plane of the further rift basin.

[0174] In some embodiments of the present application, the further morphological parameter generation sub-unit is configured to:

[0175] the depression geometric morphological parameter = the length on the plane / (the width on the plane × the basement burial depth).

[0176] In some embodiments of the present application, the abundance calculation model generation unit comprises:

[0177] The abundance calculation model generation subunit is configured to fit the depression geometry parameters of the other rift basins and the petroleum geological resource abundance of the other rift basins in a two-dimensional coordinate system to generate the petroleum resource abundance calculation model.

[0178] From the above description, it can be known that the embodiment of the present application provides a device for determining the oil and gas resource quantity of a rift basin, which comprises: a compound acquisition module configured to acquire aromatic hydrocarbon compounds in liquid hydrocarbon simulation products of target crude oil; wherein the aromatic hydrocarbon compounds comprise phenanthrene, methylphenanthrene and dimethylphenanthrene+ethylphenanthrene; and a crude oil thermal cracking degree determination module configured to determine the thermal cracking degree of the target crude oil according to the weight of phenanthrene, the weight of methylphenanthrene and the weight of dimethylphenanthrene+ethylphenanthrene.

[0179] The embodiment of the present application provides a device for determining the oil and gas resource quantity of a rift basin, which establishes the relationship between the geochemical characteristics of aromatic hydrocarbon products and the thermal cracking degree in the thermal cracking process according to the thermal cracking degree of crude oil at different thermal evolution stages at different temperature points in the thermal simulation process, thereby establishing a quantitative identification method for the thermal cracking degree of crude oil, and dividing the crude oil into four different thermal cracking stages, i.e., <10%, 10-30%, 30-60% and >60% according to thermal alteration.

[0180] Embodiment five:

[0181] The embodiment of the present application also provides a specific implementation of an electronic device capable of realizing all steps in the method for determining the oil and gas resource quantity of a rift basin in the above-mentioned embodiments, which is described with reference to Figure 13 The electronic device specifically comprises the following contents:

[0182] A processor 1201, a memory 1202, a communications interface 1203 and a bus 1204;

[0183] The processor 1201, the memory 1202 and the communications interface 1203 are connected to each other through the bus 1204; the communications interface 1203 is configured to realize information transmission between the server-side device and the client-side device and other related devices;

[0184] The processor 1201 is configured to call the computer program in the memory 1202, and the processor realizes all steps in the method for determining the oil and gas resource quantity of a rift basin in the above-mentioned embodiments when executing the computer program, for example, the processor realizes the following steps when executing the computer program:

[0185] obtaining geometric characteristic parameters of the target faulted basin; wherein the geometric characteristic parameters comprise a recessed area, a length on a plane, a width, and a buried depth of a basement of the faulted basin;

[0186] determining the oil resource amount of the target faulted basin according to the geometric characteristic parameters of the target faulted basin and a pre-generated oil resource abundance calculation model; wherein the oil resource abundance calculation model is generated according to the length on the plane, the width, the buried depth of the basement, and the oil resource amount of at least one other faulted basin.

[0187] Embodiment six:

[0188] The embodiments of the present application also provide a computer readable storage medium capable of implementing all steps of the oil and gas resource amount determination method of the faulted basin in the above embodiments. The computer readable storage medium stores a computer program. When the computer program is executed by a processor, all steps of the oil and gas resource amount determination method of the faulted basin in the above embodiments are implemented. For example, when the computer program is executed by the processor, the following steps are implemented:

[0189] obtaining geometric characteristic parameters of the target faulted basin; wherein the geometric characteristic parameters comprise a recessed area, a length on a plane, a width, and a buried depth of a basement of the faulted basin;

[0190] determining the oil resource amount of the target faulted basin according to the geometric characteristic parameters of the target faulted basin and a pre-generated oil resource abundance calculation model; wherein the oil resource abundance calculation model is generated according to the length on the plane, the width, the buried depth of the basement, and the oil resource amount of at least one other faulted basin.

[0191] Each of the embodiments in the specification is described in a progressive manner, and the same and similar parts of each of the embodiments can be referred to each other. Each of the embodiments mainly describes the difference from other embodiments. Especially, for the hardware+program type embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiment.

[0192] The above describes specific embodiments of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be executed in an order different than the order in the embodiments and still achieve the desired result. In addition, the processes depicted in the figures do not necessarily require the particular order shown or sequential order to achieve the desired results. In certain implementations, multitasking and parallel processing can be advantageous or possible.

[0193] Although the method operations can be implemented as software (e.g., instructions stored in memory and executed by a processor), in other embodiments, the method operations can be implemented as hardware or a combination of software and / or hardware. For example, one or more of the method operations described herein can be implemented or supported by one or more computers, such as servers, workstations, storage devices, or the like and associated devices such as mobile phones, tablets, or the like and / or one or more hardware logic components such as ASICs, FPGAs, or the like.

[0194] For ease of description, the above apparatus is described as various modules for performing respective functions. Of course, the functions of the modules can be implemented in one or more software and / or hardware components, and the modules can be combined or integrated in another system, or some features can be ignored or not performed. Also, the coupling or direct coupling or communication connection between the modules shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other form.

[0195] Those skilled in the art will also appreciate that, in addition to being implemented in purely computer readable program code means, the controller can be implemented using logic programming, such that the controller is implemented in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers and embedded microcontrollers, etc. Thus, the controller can be considered as a hardware component, and the means for performing the various functions comprised therein can be considered as structures within the hardware component. Alternatively, or even additionally, the means for performing the various functions can be considered as both software modules implementing the method and structures within the hardware component.

[0196] In a typical arrangement, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0197] The memory can include non-persistent memory and / or volatile memory, such as random access memory (RAM) and / or cache memory, non-volatile memory, such as read-only memory (ROM), EPROM, and / or flash memory, etc. The memory is an example of computer readable media.

[0198] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. In particular, the system embodiments are described simply because they are basically similar to the method embodiments, and the relevant parts can be referred to the description of the method embodiments. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the specification. The illustrative description of the above terms in the specification does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0199] The above only describes the embodiments of the embodiments of the specification and does not limit the embodiments of the specification. The embodiments of the specification can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the specification shall be included in the scope of claims of the embodiments of the specification.

Claims

1. A method for determining the amount of oil and gas resources in a rift basin, characterized in that, include: Obtain the geometric characterization parameters of the target rift basin; wherein, the geometric characterization parameters include: the depression area, length and width in the plane, and basal burial depth of the rift basin; The oil resources of the target rift basin are determined based on the geometric characteristics of the target rift basin and a pre-generated oil resource abundance calculation model; wherein the oil resource abundance calculation model is generated based on the length, width, basement burial depth, and oil resource quantity of at least one other rift basin in the plane.

2. The method for determining the oil and gas resources of a rift basin according to claim 1, characterized in that, The steps for generating the oil resource abundance calculation model include: Generate the depression geometry parameters of the other rift basins based on the geometric characterization parameters of the at least one other rift basin. The abundance of petroleum geological resources in the other rift basins is determined based on the amount of petroleum resources and the area of ​​the depressions. The oil resource abundance calculation model is generated based on the depression geometry parameters of the other rift basins and the oil geological resource abundance of the other rift basins.

3. The method for determining the oil and gas resources of a rift basin according to claim 2, characterized in that, The oil resources of the target rift basin are determined based on its geometric characteristics and a pre-generated oil resource abundance calculation model, including: The oil resource abundance of the target rift basin is determined based on its length, width, basement burial depth on the plane, and the oil resource abundance calculation model. The amount of oil resources in the target rift basin is determined based on the depression area and the oil resource abundance of the target rift basin.

4. The method for determining the oil and gas resources of a rift basin according to claim 3, characterized in that, The oil resource abundance of the target rift basin is determined based on its length, width, basement burial depth, and the oil resource abundance calculation model, including: The depression geometry parameters of the target rift basin are determined based on its length, width, and basal burial depth on the plane. The oil resource abundance of the target rift basin is determined based on the depression geometry parameters and the oil resource abundance calculation model.

5. The method for determining the oil and gas resources of a rift basin according to claim 2, characterized in that, Generating the depression geometry parameters of the other rift basins based on the geometric characterization parameters of the at least one other rift basin includes: The depression geometry parameters of the other rift basins are generated based on their length, width, and basal burial depth on the plane.

6. The method for determining the oil and gas resources of a rift basin according to claim 5, characterized in that, The depression geometry parameters of the other rift basins are generated based on their length, width, and basement burial depth on the plane, including: The geometric parameters of the depression = length on the plane / (width on the plane × burial depth of the base).

7. The method for determining the oil and gas resources of a rift basin according to claim 2, characterized in that, The oil resource abundance calculation model is generated based on the depression geometry parameters and oil geological resource abundance of the other rift basins, including: In a two-dimensional coordinate system, the depression geometry parameters of the other rift basins are fitted with the oil geological resource abundance of the other rift basins to generate the oil resource abundance calculation model.

8. A device for determining the amount of oil and gas resources in a rift basin, characterized in that, include: The geometric characterization parameter acquisition module is used to acquire the geometric characterization parameters of the target rift basin; wherein, the geometric characterization parameters include: the depression area, length and width on the plane, and basal burial depth of the rift basin; The oil resource quantity determination module is used to determine the oil resource quantity of the target rift basin based on the geometric characterization parameters of the target rift basin and a pre-generated oil resource abundance calculation model; wherein, the oil resource abundance calculation model is generated based on the length, width, basement burial depth and oil resource quantity of at least one other rift basin in the plane.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the method for determining the oil and gas resources of a rift basin as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method for determining the amount of oil and gas resources in a rift basin as described in any one of claims 1 to 7.

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