A method and apparatus for modeling a diagenetic trap

Abstract

The application discloses a method and device for simulating a diagenetic trap, and the method for simulating the diagenetic trap comprises the following steps: collecting porosity and permeability parameters of a diagenetic trap under a well; proportioning experimental materials based on the porosity and permeability parameters of the diagenetic trap; and manufacturing a diagenetic trap experimental model based on the proportioned experimental materials. The application adopts quartz sand and organic silicon powder as the experimental materials, adjusts the volume ratio between the quartz sand and the organic silicon powder, can simulate the physical property difference of different diagenetic stages in the formation process of the diagenetic trap, can be applied to the basic theoretical 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 within sedimentary basins and are closely related to differences in porosity and permeability caused by sedimentation. However, simulating the formation and evolution of diagenetic traps in nature under laboratory conditions is currently very difficult. This is primarily due to a lack of experimental materials that can accurately represent the different reservoir-caprock combinations found in diagenetic traps, and an inability to simulate the differences in physical properties at 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, the experimental materials are proportioned;

[0006] Based on the proportioned experimental materials, a diagenetic trap experimental model was 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 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 fume at different volume ratios, and determine the relationship between different volume ratios and porosity and permeability;

[0011] The volume ratio of quartz sand and silica fume is determined 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 of the experimental material ranges from 0.01 to 1 md.

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

[0016] Determine the scope and boundaries of diagenetic traps based on the peak and trough information in seismic reflection profiles;

[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, strata with different porosity and permeability 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, configured to proportion experimental materials based on the porosity and permeability parameters of the diagenetic trap;

[0022] The 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 to:

[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 to:

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

[0027] The volume ratio of quartz sand and silica fume is determined 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 during the formation of diagenetic traps can be simulated; the embodiments of the present invention 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 in part will become apparent from the description, or will be 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 is a brief introduction to 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 any creative work.

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

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

[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] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 making creative efforts shall fall within the scope of protection of the present invention.

[0036] Figure 1 FIG. 1 is a flow chart showing a method for simulating diagenetic traps according to an embodiment of the present invention. Figure 1 As shown, the present invention proposes a method for simulating diagenetic traps, comprising 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, the experimental materials are proportioned;

[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 application collects porosity and permeability data of the target area of the rock cycle trap, and adjusts the proportion of the experimental material to make the rock cycle experimental model meeting the physical property requirements, which is used to simulate the porosity and permeability of different rock cycle traps.

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

[0043] The porosity and permeability of different rock cycle traps are tested or calculated by using core or logging data.

[0044] The porosity and permeability of different rock cycle traps are calculated by core testing or logging data, which provides accurate data basis for subsequent preparation of experimental materials and improves the accuracy of the rock cycle experimental model.

[0045] In some embodiments, the specific steps of adjusting the proportion of the experimental material based on the porosity and permeability parameters of the rock cycle trap are as follows:

[0046] The porosity and permeability of different volume proportions of quartz sand and silicon powder are obtained, and the quantitative relationship between different volume proportions and porosity and permeability is determined; wherein the quartz sand and silicon powder need to be mixed uniformly before measurement.

[0047] Based on the porosity and permeability parameters of the actual rock cycle trap underground, the volume proportion of quartz sand and silicon powder is adjusted.

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

[0049] When the volume proportion of quartz sand and silicon powder is 1:1-4, the experimental material representing different rock stages can accurately simulate the porosity and permeability of the rock cycle trap.

[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 proportion of quartz sand and silicon powder is 1:1, the rock with a porosity of 5% and a permeability of 1 md in the sedimentary rock stage can be simulated.

[0053] In one embodiment, when the volume proportion of quartz sand and silicon powder is 1:2, the rock with a porosity of 4% and a permeability of 0.3 md in the sedimentary rock 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 silica 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 above description uses quartz sand and silica fume volume ratios of 1:1, 1:2, 1:3, and 1:4 as examples, the present invention is not limited thereto. Various combinations of quartz sand and silica fume volume ratios can be used, such as 1:1.1, 1:1.9, 1:3.2, and 1:4.5. Those skilled in the art can comprehensively consider the ratios of the present invention and actual application scenarios, 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 for making a diagenetic trap experimental model based on the experimental materials in the proportion are as follows:

[0058] Determine the scope and boundaries of diagenetic traps based on the peak and trough information in seismic reflection profiles;

[0059] 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. For example, the inversion can be performed under the constraints of the porosity and permeability measured in three wells; wherein wells 1, 2, and 3 are spaced apart, 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, strata with different porosity and permeability in the diagenetic trap are simulated to obtain the diagenetic trap experimental model.

[0061] Although the above description uses the example of performing an inversion under the constraints of porosity and permeability measured by three wells as an example, the present invention is not limited to this example. The present invention can also utilize porosity and permeability data measured by multiple wells, such as four, five, six, or seven wells. Those skilled in the art can comprehensively consider the principles of the present invention and actual application scenarios, 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 physical property differences at different diagenetic stages during the formation of diagenetic traps.

[0063] The produced diagenetic trap experimental model can simulate the structural deformation of the diagenetic trap caused by structural compression or tension after its formation, 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 can be carried out on oil and gas filling (surface filling), late structural deformation, etc.

[0066] The present invention has been applied to the basic theoretical research on different types of diagenetic traps in basins such as the Junggar and Tarim Basins, and has provided guidance for exploration deployment.

[0067] Core data were used to test the porosity and permeability of the reservoir caprocks in different diagenetic traps. The porosity of the rocks surrounding the diagenetic trap was 3% and the permeability was 0.2 md / d. The diagenetic trap area was divided into a left side and a right side. The porosity of the rocks in the left area was 5% and the permeability was 1 md / d; the porosity of the rocks in the right area was 4% and the permeability was 0.3 md / d.

[0068] According to the porosity and permeability of different diagenetic trap reservoir caprocks, the volume ratios of quartz sand and silica fume are 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 profiles of the diagenetic trap;

[0071] Based on the porosity and permeability profiles of well-proportioned experimental materials and diagenetic traps, it is used to simulate strata with different porosity and permeability in diagenetic traps (such as Figure 3 ), and a diagenetic trap experimental model was obtained; wherein, quartz sand and silica powder with a volume ratio of 1:3 were used to simulate the strata surrounding the diagenetic trap, and the diagenetic trap area was divided into a left area and a right area. Quartz sand and silica powder with a volume ratio of 1:1 were used to simulate the left area of ​​the diagenetic trap, and quartz sand and silica powder with a volume ratio of 1:2 were 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 an exploratory well can be deployed. Otherwise, it is recommended not to drill a well.

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

[0075] A collection unit for collecting porosity and permeability parameters of downhole diagenetic traps;

[0076] a proportioning unit, configured to proportion experimental materials based on the porosity and permeability parameters of the diagenetic trap;

[0077] The 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 fume at different volume ratios, and determine the relationship between different volume ratios and porosity and permeability;

[0082] The volume ratio of quartz sand and silica fume is determined based on the porosity and permeability parameters of the diagenetic trap.

[0083] Figure 4 FIG. 1 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] During the specific implementation process, at least one processor 401 executes the computer-executable instructions stored in the memory 402, so that the 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. Its implementation principle and technical effects are similar and will not be repeated here in this embodiment.

[0086] In the above Figure 4In the illustrated embodiment, it should be understood that the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASICs), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the present invention may be directly executed by a hardware processor or 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 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be classified into address buses, data buses, and control buses. For ease of illustration, the buses in the drawings of this application are not limited to just one bus or just 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 memory 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 computer-readable storage medium can be any available medium that can be accessed by a general-purpose 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 an integral part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in a device as discrete components.

[0092] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[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 replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for simulating diagenetic traps, 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, the experimental materials are proportioned; Based on the proportioned experimental materials, a diagenetic trap experimental model is produced; The specific steps of proportioning 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 fume at different volume ratios, and determine the relationship between different volume ratios and porosity and permeability; Based on the porosity and permeability parameters of the diagenetic trap, the volume ratio of quartz sand and silica fume is proportional; The specific steps of making a diagenetic trap experimental model based on the experimental materials in the proportion are as follows: Determine the scope and boundaries of diagenetic traps based on the peak and trough information in seismic reflection profiles; 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, strata with different porosity and permeability in the diagenetic trap are simulated to obtain the diagenetic trap experimental model.

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 volume ratio of the quartz sand to the silicon powder is 1:1-4.

4. 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%.

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

6. 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, configured to proportion experimental materials based on the porosity and permeability parameters of the diagenetic trap; A manufacturing unit, used for manufacturing a diagenetic trap experimental model based on the proportioned experimental materials; The proportioning unit is specifically used for: Obtain the porosity and permeability of quartz sand and silica fume at different volume ratios, and determine the relationship between different volume ratios and porosity and permeability; Based on the porosity and permeability parameters of the diagenetic trap, the volume ratio of quartz sand and silica fume is proportional; The production unit is specifically used for: Determine the scope and boundaries of diagenetic traps based on the peak and trough information in seismic reflection profiles; 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, strata with different porosity and permeability in the diagenetic trap are simulated to obtain the diagenetic trap experimental model.

7. The device for simulating diagenetic trap according to claim 6, 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.

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