Method and device for simulating diagenesis trap

Abstract

The invention discloses a method and a device for simulating diagenetic traps. The method for simulating the diagenetic traps comprises the following steps: collecting porosity and permeability parameters of underground diagenetic traps; based on the porosity and permeability parameters of the diagenetic trap, proportioning experimental materials; and making a diagenetic trap experimental model based on the experimental material in proportion. The quartz sand and the organic silicon powder are adopted as experimental materials, and the physical property difference of different diagenetic stages in the diagenetic trap forming process can be simulated by adjusting the volume ratio of the quartz sand to the organic silicon powder; the method can be applied to basic theory research of different types of diagenetic traps, and can guide actual exploration deployment.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum exploration, and in particular relates to a method and a device for simulating diagenetic traps. Background Art

[0002] Diagenetic traps develop in sedimentary basins and are closely related to the porosity and permeability differences caused by sedimentation. However, it is very difficult to simulate the formation and evolution of diagenetic traps in nature under laboratory conditions. The main reason is the lack of experimental materials that can similarly represent different reservoir-caprock combinations in diagenetic traps, and the inability to simulate the differences in physical properties of different diagenetic stages during the formation of diagenetic traps. Summary of the invention

[0003] In view of the above problems, the present invention discloses a method for simulating diagenetic traps, comprising the following steps:

[0004] Collect porosity and permeability parameters of downhole diagenetic traps;

[0005] Based on the porosity and permeability parameters of the diagenetic trap, proportioning the experimental materials;

[0006] Based on the proportioned experimental materials, a diagenetic trap experimental model is made.

[0007] Furthermore, the specific steps of collecting the porosity and permeability parameters of the downhole diagenetic trap are as follows:

[0008] Using core or logging data, test or calculate the porosity and permeability of different diagenetic traps, reservoirs and caprocks.

[0009] Furthermore, the specific steps of proportioning the experimental materials based on the porosity and permeability parameters of the diagenetic trap are as follows:

[0010] Obtain the porosity and permeability of quartz sand and silica powder in different volume ratios, and determine the relationship between different volume ratios and porosity and permeability;

[0011] The volume ratio of quartz sand and silica powder is proportioned based on the porosity and permeability parameters of the diagenetic trap.

[0012] Furthermore, the volume ratio of the quartz sand to the silicon powder is 1:1-4.

[0013] Furthermore, the porosity of the experimental material ranges from 2.1 to 5%.

[0014] Furthermore, the permeability range of the experimental material is 0.01 to 1 md.

[0015] Furthermore, the specific steps of making a diagenetic trap experimental model based on the experimental materials in the proportion are as follows:

[0016] Determine the scope and boundary of the diagenetic trap based on the peak and trough information in the seismic reflection profile;

[0017] Using the amplitude information of the seismic reflection profile, under the constraints of the porosity and permeability measured in multiple wells, an inversion is performed to obtain the porosity and permeability profile of the diagenetic trap;

[0018] Based on the well-proportioned experimental materials and the porosity and permeability profiles of the diagenetic trap, the strata with different porosities and permeabilities in the diagenetic trap are simulated to obtain the diagenetic trap experimental model.

[0019] The present invention also discloses a device for simulating diagenetic traps, comprising:

[0020] A collection unit for collecting porosity and permeability parameters of downhole diagenetic traps;

[0021] A proportioning unit, used for proportioning experimental materials based on the porosity and permeability parameters of the diagenetic trap;

[0022] A production unit is used to produce a diagenetic trap experimental model based on the proportioned experimental materials.

[0023] Furthermore, the collection unit is specifically used for:

[0024] Using core or logging data, test or calculate the porosity and permeability of different diagenetic traps, reservoirs and caprocks.

[0025] Furthermore, the proportioning unit is specifically used for:

[0026] Obtain the porosity and permeability of quartz sand and silica powder in different volume ratios, and determine the relationship between different volume ratios and porosity and permeability;

[0027] The volume ratio of quartz sand and silica powder is proportioned based on the porosity and permeability parameters of the diagenetic trap.

[0028] Compared with the prior art, the embodiments of the present invention have at least the following advantages: by using quartz sand and organosilicon powder as experimental materials and adjusting the volume ratio between quartz sand and organosilicon powder, the physical property differences at different diagenetic stages in the formation process of diagenetic traps can be simulated; it can be applied to the basic theoretical research of different types of diagenetic traps and guide actual exploration deployment.

[0029] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A flow chart showing a method for simulating a diagenetic trap according to an embodiment of the present invention is shown;

[0032] Figure 2 A seismic reflection profile of a diagenetic trap according to an embodiment of the present invention is shown;

[0033] Figure 3 A schematic diagram of a diagenetic trap experimental model according to an embodiment of the present invention is shown;

[0034] Figure 4 A schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Figure 1 FIG. 4 is a flow chart showing a method for simulating a diagenetic trap according to an embodiment of the present invention. Figure 1 As shown, a method for simulating diagenetic traps proposed by the present invention comprises the following steps:

[0037] Collect porosity and permeability parameters of downhole diagenetic traps;

[0038] Based on the porosity and permeability parameters of the diagenetic trap, proportioning the experimental materials;

[0039] Based on the proportioned experimental materials, a diagenetic trap experimental model is produced;

[0040] Based on the diagenetic trap experimental model, structural deformation and oil and gas filling experiments were carried out.

[0041] The present invention collects porosity and permeability data of diagenetic traps in target areas, and produces a diagenetic trap experimental model that meets physical property requirements by adjusting the ratio of experimental materials, so as to simulate the porosity and permeability of reservoir caprocks of different diagenetic traps.

[0042] In some embodiments, the specific steps of collecting the porosity and permeability parameters of the downhole diagenetic trap are as follows:

[0043] Using core or logging data, test or calculate the porosity and permeability of different diagenetic traps, reservoirs and caprocks.

[0044] Through core testing or logging data calculation, the porosity and permeability of different diagenetic trap reservoirs and caprocks can be obtained, providing an accurate data basis for the subsequent preparation of experimental materials and improving the accuracy of the diagenetic trap experimental model.

[0045] In some embodiments, the specific steps of mixing experimental materials based on the porosity and permeability parameters of the diagenetic trap are as follows:

[0046] The porosity and permeability of quartz sand and silica powder in different volume ratios are obtained, and the quantitative relationship between different volume ratios and porosity and permeability is determined; among them, quartz sand and silica powder need to be mixed evenly before measurement.

[0047] The volume ratio of quartz sand and silica powder is proportioned based on the porosity and permeability parameters of the actual underground diagenetic trap.

[0048] In some embodiments, the volume ratio of the quartz sand to the silicon powder is 1:1-4.

[0049] When the volume ratio of quartz sand and silica powder is 1:1 to 4, the experimental materials representing different diagenetic stages can accurately simulate the porosity and permeability of the diagenetic trap reservoir caprock.

[0050] In some embodiments, the porosity of the experimental material ranges from 2.1 to 5%.

[0051] In some embodiments, the permeability of the experimental material ranges from 0.01 to 1 md.

[0052] In one embodiment, when the volume ratio of quartz sand to silica powder is 1:1, a rock with a porosity of 5% and a permeability of 1 md in the sedimentary diagenesis stage can be simulated;

[0053] In one embodiment, when the volume ratio of quartz sand to silica powder is 1:2, a rock with a porosity of 4% and a permeability of 0.3 md in the sedimentary diagenesis stage can be simulated;

[0054] In one embodiment, when the volume ratio of quartz sand to silica powder is 1:3, a rock with a porosity of 3% and a permeability of 0.2 md in the sedimentary diagenesis stage can be simulated;

[0055] In one embodiment, when the volume ratio of quartz sand to silicon powder is 1:4, a rock with a porosity of 2.1% and a permeability of 0.01 md in the sedimentary diagenesis stage can be simulated.

[0056] Although the volume ratios of quartz sand and silicon powder are 1:1, 1:2, 1:3, and 1:4 respectively, the present invention is not limited thereto, and the volume ratios of quartz sand and silicon powder can be various combinations, such as 1:1.1, 1:1.9, 1:3.2, 1:4.5, etc. Those skilled in the art can comprehensively consider the ratios of the present invention and the actual application conditions, as long as the simulation method of the present invention can be implemented.

[0057] Figure 3 Schematic diagram of a diagenetic trap experimental model according to an embodiment of the present invention is shown. Figure 3 As shown, the specific steps of making the diagenetic trap experimental model based on the experimental materials in proportion are as follows:

[0058] Determine the scope and boundary of the diagenetic trap based on the peak and trough information in the seismic reflection profile;

[0059] By using the amplitude information of the seismic reflection profile, under the constraints of the porosity and permeability measured in multiple wells, an inversion is performed to obtain the porosity and permeability profile of the diagenetic trap; illustratively, the inversion can be performed under the constraints of the porosity and permeability measured in three wells; wherein well 1, well 2 and well 3 are arranged at intervals, and well 2 passes through the diagenetic trap area;

[0060] Based on the well-proportioned experimental materials and the porosity and permeability profiles of the diagenetic trap, the strata with different porosities and permeabilities in the diagenetic trap are simulated to obtain the diagenetic trap experimental model.

[0061] Although the above description uses the inversion under the constraints of porosity and permeability measured in three wells as an example, the present invention is not limited thereto, and the porosity and permeability data measured in multiple wells can be used, such as four wells, five wells, six wells, seven wells, etc. Those skilled in the art can make comprehensive considerations based on the principles of the present invention and actual application situations, as long as the principles of the present invention can be implemented.

[0062] By using well-proportioned experimental materials and based on the diagenetic trap status described by seismic data, a diagenetic trap experimental model of the target area can be quickly and accurately produced, which can simulate the differences in physical properties at different diagenetic stages during the formation of diagenetic traps.

[0063] The produced diagenetic trap experimental model can simulate the structural deformation caused by structural compression or tension after the diagenetic trap is formed, and can be filled with oil and gas.

[0064] In some embodiments, based on the diagenetic trap experimental model, the specific steps of conducting the structural deformation and oil and gas filling experiment are as follows:

[0065] Based on the above-mentioned diagenetic trap experimental model, a series of experimental studies such as oil and gas filling (surface filling) and late structural deformation can be carried out.

[0066] The present invention is applied to the basic theoretical research on different types of diagenetic traps in the Junggar and Tarim basins, and provides guidance for exploration deployment.

[0067] Using core data, the porosity and permeability of reservoir caprocks in different diagenetic traps were tested. The porosity of the rocks outside the diagenetic trap was 3% and the permeability was 0.2md. The diagenetic trap area was divided into the left and right sides. The porosity of the rocks in the left area was 5% and the permeability was 1md. The porosity of the rocks in the right area was 4% and the permeability was 0.3md.

[0068] According to the porosity and permeability of different diagenetic trap reservoir caprocks, the volume ratios of quartz sand and silica powder were prepared as 1:1, 1:2, and 1:3, respectively;

[0069] like Figure 2 As shown, the scope and boundary of the diagenetic trap are determined based on the peak and trough information in the seismic reflection profile;

[0070] Using the amplitude information of the seismic reflection profile, under the constraints of the porosity and permeability measured in wells 1-3, an inversion was performed to obtain the porosity and permeability profile of the diagenetic trap;

[0071] Based on the well-proportioned experimental materials and the porosity and permeability profiles of the diagenetic trap, it is used to simulate the formations with different porosity and permeability in the diagenetic trap (such as Figure 3 As shown), a diagenetic trap experimental model is obtained; wherein, quartz sand and silicon powder with a volume ratio of 1:3 are used to simulate the peripheral strata of the diagenetic trap, and the diagenetic trap area is divided into a left area and a right area. Quartz sand and silicon powder with a volume ratio of 1:1 are used to simulate the left area of ​​the diagenetic trap, and quartz sand and silicon powder with a volume ratio of 1:2 are used to simulate the right area of ​​the diagenetic trap;

[0072] The oil and gas injection conduit is set below the diagenetic trap, and the dyed white oil (such as Figure 3 shown);

[0073] Observe whether the diagenetic trap experimental model is filled with dyed white oil. If the filling is successful, it means that the diagenetic trap may form an underground reservoir and a drilling well can be deployed. Otherwise, it is recommended not to drill a well.

[0074] Based on the above method for simulating diagenetic traps, the present invention further provides a device for simulating diagenetic traps, comprising:

[0075] A collection unit, used to collect porosity and permeability parameters of the downhole diagenetic trap;

[0076] A proportioning unit, used for proportioning experimental materials based on the porosity and permeability parameters of the diagenetic trap;

[0077] A production unit is used to produce a diagenetic trap experimental model based on the proportioned experimental materials.

[0078] In some embodiments, the collection unit is specifically used to:

[0079] Using core or logging data, test or calculate the porosity and permeability of different diagenetic traps, reservoirs and caprocks.

[0080] In some embodiments, the proportioning unit is specifically used to:

[0081] Obtain the porosity and permeability of quartz sand and silica powder in different volume ratios, and determine the relationship between different volume ratios and porosity and permeability;

[0082] Based on the porosity and permeability parameters of the diagenetic trap, the volume ratio of quartz sand and silica powder is proportional.

[0083] Figure 4 FIG. 2 shows a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Figure 4 As shown, the electronic device provided by this embodiment includes: at least one processor 401 and a memory 402. The processor 401 and the memory 402 are connected via a bus 403.

[0084] In a specific implementation process, at least one processor 401 executes the computer-executable instructions stored in the memory 402, so that at least one processor 401 executes the method in the above method embodiment.

[0085] The specific implementation process of the processor 401 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0086] In the above Figure 4In the illustrated embodiment, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0087] The memory may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk storage.

[0088] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0089] An embodiment of the present invention further provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the method of the above method embodiment is implemented.

[0090] The computer-readable storage medium mentioned above can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0091] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0092] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0093] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for simulating a diagenetic trap, characterized in that: The following steps are involved: Collect porosity and permeability parameters of downhole diagenetic traps; Based on the porosity and permeability parameters of the diagenetic trap, proportioning the experimental materials; Based on the proportioned experimental materials, a diagenetic trap experimental model is made.

2. The method for simulating diagenetic trap according to claim 1, characterized in that: The specific steps of collecting the porosity and permeability parameters of the downhole diagenetic trap are as follows: Using core or logging data, test or calculate the porosity and permeability of different diagenetic traps, reservoirs and caprocks.

3. The method for simulating diagenetic trap according to claim 1, characterized in that: The specific steps of proportioning the experimental materials based on the porosity and permeability parameters of the diagenetic trap are as follows: Obtain the porosity and permeability of quartz sand and silica powder in different volume ratios, and determine the relationship between different volume ratios and porosity and permeability; The volume ratio of quartz sand and silica powder is proportioned based on the porosity and permeability parameters of the diagenetic trap.

4. The method for simulating diagenetic trap according to claim 3, characterized in that: The volume ratio of the quartz sand to the silicon powder is 1:1-4.

5. The method for simulating diagenetic trap according to claim 1, characterized in that: The porosity of the experimental materials ranged from 2.1 to 5%.

6. The method for simulating diagenetic trap according to claim 1, characterized in that: The permeability range of the experimental materials is 0.01 to 1 md.

7. The method for simulating diagenetic trap according to claim 1, characterized in that: The specific steps of making the diagenetic trap experimental model based on the experimental materials in proportion are as follows: Determine the scope and boundary of the diagenetic trap based on the peak and trough information in the seismic reflection profile; Using the amplitude information of the seismic reflection profile, under the constraints of the porosity and permeability measured in multiple wells, an inversion is performed to obtain the porosity and permeability profile of the diagenetic trap; Based on the well-proportioned experimental materials and the porosity and permeability profiles of the diagenetic trap, the strata with different porosities and permeabilities in the diagenetic trap are simulated to obtain the diagenetic trap experimental model.

8. A device for simulating diagenetic traps, characterized in that: include: A collection unit for collecting porosity and permeability parameters of downhole diagenetic traps; A proportioning unit, used for proportioning experimental materials based on the porosity and permeability parameters of the diagenetic trap; A production unit is used to produce a diagenetic trap experimental model based on the proportioned experimental materials.

9. The device for simulating diagenetic trap according to claim 8, characterized in that: The collecting unit is specifically used for: Using core or logging data, test or calculate the porosity and permeability of different diagenetic traps, reservoirs and caprocks.

10. The device for simulating diagenetic trap according to claim 8, characterized in that: The proportioning unit is specifically used for: Obtain the porosity and permeability of quartz sand and silica powder in different volume ratios, and determine the relationship between different volume ratios and porosity and permeability; The volume ratio of quartz sand and silica powder is proportioned based on the porosity and permeability parameters of the diagenetic trap.

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