Composite segmentation method and device for ultra-deep gas reservoir thick reservoir reconstruction

Abstract

The embodiment of the present invention provides a composite segmentation method and device for transforming thick reservoirs in ultra-deep gas reservoirs, comprising the following steps: determining the fine stratification corresponding to the reservoir in the marker layer according to the reservoir characteristics of each reservoir in the marker layer, wherein each fine stratification includes at least one reservoir, and the difference between the reservoir characteristics of the reservoirs corresponding to each fine stratification is less than or equal to a preset threshold; determining the mechanical stratification corresponding to each fine stratification according to adjacent similar characteristics, wherein each mechanical stratification includes at least one fine stratification; determining the temporary plugging stratification corresponding to the mechanical stratification according to similar adjacent characteristics; and transforming the temporary plugging stratification. The composite segmentation method for transforming thick reservoirs in ultra-deep gas reservoirs provided by the embodiment of the present invention enables uniform transformation of the thick reservoirs in ultra-deep gas reservoirs during transformation, making the transformation of the thick reservoirs more complete and achieving a substantial increase in production of a single well.

Description

Technical Field

[0001] The present invention relates to the technical field of oil extraction, and in particular to a composite segmentation method and device for transforming a thick reservoir in an ultra-deep gas reservoir. Background Art

[0002] When developing mineral resources, it is necessary to transform the reservoir of the mineral resources in order to develop the mineral resources from the reservoir. However, due to the ultra-deep reservoir, the temperature, pressure and ground stress are relatively high, and the conventional downhole segmentation tools used for reservoir transformation are no longer applicable, making it difficult to mine.

[0003] In the prior art, for ultra-deep and thick reservoirs of this type, temporary plugging materials are usually used to perform stratification and then implement production improvement and transformation, thereby realizing the transformation of the reservoir. Since the stratification effect of temporary plugging materials is poor, only 2-3 layers can be divided, and the number of layers is small. Performing 2-3 layers of temporary plugging and stratification in thicker reservoirs cannot cover most of the reservoirs. In another transformation scheme, some wells can be constructed with 2 packers to achieve 2-layer separation, which can achieve effective stratification.

[0004] However, in the prior art, it is difficult to achieve uniform transformation of thick reservoirs, and artificial fractures cannot cover most of the reservoirs. Summary of the invention

[0005] The embodiment of the present invention provides a method and device for composite segmentation of ultra-deep gas reservoir thick reservoir transformation, which is used to solve the problem that the amount of erosion obtained in the prior art is often smaller than the actual amount of erosion and has a large error.

[0006] On the one hand, an embodiment of the present invention provides a method for composite segmentation of ultra-deep gas reservoir thick reservoir reformation, the method comprising the following steps:

[0007] Determine the fine stratification corresponding to the reservoir in the marker layer according to the reservoir characteristics of each reservoir in the marker layer, wherein each fine stratification includes at least one reservoir, and the difference between the reservoir characteristics of the reservoirs corresponding to the fine stratifications is less than or equal to a preset threshold;

[0008] Determine the mechanical layers corresponding to each fine layer according to adjacent similar features, each mechanical layer including at least one fine layer;

[0009] Determine the temporary blocking layer corresponding to the mechanical layer according to similar adjacent features;

[0010] The temporary blocking layers are transformed.

[0011] The step of determining the first reference well in the reference wells specifically includes determining the reference well corresponding to the minimum erosion amount and the maximum formation thickness in the reference wells as the first reference well.

[0012] Wherein, before determining the fine stratification corresponding to the reservoir in the marker layer according to the reservoir characteristics of each reservoir in the marker layer, it also includes: selecting a marker layer corresponding to the target layer from the geological research area;

[0013] The reservoir characteristics of the marker layer are obtained, and the reservoir characteristics include the horizontal principal stress of the reservoir.

[0014] Among them, according to the reservoir characteristics of each reservoir in the marker layer, the fine stratification corresponding to the reservoir in the marker layer is determined, specifically including:

[0015] According to the horizontal principal stress value of each reservoir, the fine layer corresponding to the reservoir in the marker layer is determined, wherein the difference between the horizontal principal stress values ​​of the reservoirs corresponding to each fine layer is less than or equal to a preset threshold.

[0016] Among them, the horizontal principal stress value of the reservoir is the minimum horizontal principal stress value of the reservoir.

[0017] Among them, the mechanical layer corresponding to each fine layer is determined according to adjacent similar features, specifically including:

[0018] According to the minimum horizontal principal stress value corresponding to each reservoir in the same fine layer, the minimum horizontal principal stress value of the corresponding fine layer is obtained;

[0019] According to the minimum horizontal principal stress values ​​of each fine layer, multiple fine layers are determined to be the same mechanical layer, wherein the difference between the minimum horizontal principal stress values ​​of the corresponding fine layers in the same mechanical layer is less than or equal to a preset threshold.

[0020] Among them, the temporary blocking layer corresponding to the mechanical layer is determined according to similar adjacent features, specifically including:

[0021] According to the minimum horizontal principal stress value corresponding to each fine layer in the same mechanical layer, the fine layers of the selected layer in the mechanical layer are merged and layered, and multiple fine layers in the mechanical layer are determined as the same temporary blocking layer.

[0022] The merging and stratification specifically includes: stratifying each mechanical layer into at least two temporary blocking layers.

[0023] Among them, the temporary plugging layer is transformed, specifically including: setting a reservoir transformation seam for each temporary plugging layer.

[0024] Among them, after the temporary plugging layer is transformed, it also includes: multi-segment reservoir transformation of mechanical layer and temporary plugging layer.

[0025] On the other hand, an embodiment of the present invention further provides a composite segmented device for transforming a thick reservoir in an ultra-deep gas reservoir, the device comprising:

[0026] A formation acquisition module is used to select a marker layer corresponding to a target layer from a geological research area and obtain reservoir characteristics of the marker layer;

[0027] A fine stratification module is used to determine the fine stratification corresponding to the reservoir in the marker layer according to the reservoir characteristics of each reservoir in the marker layer, wherein each fine stratification includes at least one reservoir, and the difference between the reservoir characteristics of the reservoirs corresponding to the fine stratifications is less than or equal to a preset threshold;

[0028] A mechanical layering module, used to determine the mechanical layers corresponding to each fine layer according to adjacent similar features, each mechanical layer including at least one fine layer;

[0029] A temporary blocking and diversion layering module is used to determine the temporary blocking layer corresponding to the mechanical layering according to similar adjacent features;

[0030] The stratum transformation module is used to transform the temporary plugging layers.

[0031] The embodiment of the present invention provides a composite segmentation method for transforming a thick reservoir in an ultra-deep gas reservoir, which obtains the reservoir characteristics of each reservoir in the marker layer, and finely stratifies each reservoir according to the reservoir characteristics, performs secondary stratification on the reservoir characteristics of the fine stratification by similar adjacent characteristics, determines the mechanical stratification corresponding to each fine stratification, and then re-stratifies the mechanical stratification into temporary plugging stratification, and finally performs stratified transformation on each temporary plugging stratification. Among them, by finely stratifying each reservoir, mechanically stratifying again according to the reservoir characteristics of the fine stratification, and finally temporarily plugging the mechanical stratification, and transforming within the temporary plugging stratification, the thick reservoir in the ultra-deep gas reservoir can achieve uniform transformation of the reservoir during transformation, and artificial fractures can cover most of the reservoir, and more expected artificial fractures can be obtained, so that the transformation of the thick reservoir is more sufficient, and a substantial increase in single well production can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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 labor.

[0033] Figure 1 A schematic diagram of a composite segmentation method for transforming a thick reservoir in an ultra-deep gas reservoir provided by an embodiment of the present invention Figure 1 ;

[0034] Figure 2 A schematic diagram of a composite segmentation method for transforming a thick reservoir in an ultra-deep gas reservoir provided by an embodiment of the present invention Figure 2 ;

[0035] Figure 3 A schematic diagram of the structure of a composite segmented device for transforming a thick reservoir in an ultra-deep gas reservoir provided by an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the hardware structure of a composite segmented equipment for transforming a thick reservoir in an ultra-deep gas reservoir provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] 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.

[0038] In the prior art, for ultra-deep and thick reservoirs of this type of working condition, temporary plugging materials are usually used to perform stratification and then implement production improvement transformation to achieve the transformation of the reservoir. Since the stratification effect of temporary plugging materials is poor, only 2-3 layers can be divided, and the number of layers is small. Performing 2-3 layers of temporary plugging and stratification in thicker reservoirs cannot cover most of the reservoirs. In another transformation scheme, some wells can be constructed with 2 packers to achieve 2-layer separation, which can achieve effective stratification. However, when this type of method is used for thicker reservoirs, it is difficult to achieve uniform transformation of the reservoir, and artificial fractures cannot cover most of the reservoir.

[0039] Therefore, the embodiment of the present invention proposes a composite segmentation method for transforming a thick reservoir in an ultra-deep gas reservoir. Figure 1 A schematic diagram of a composite segmentation method for transforming a thick reservoir in an ultra-deep gas reservoir provided by an embodiment of the present invention Figure 1 .like Figure 1 As shown, the method comprises the following steps:

[0040] Step 101: Determine fine stratification corresponding to the reservoir in the marker layer according to reservoir characteristics of each reservoir in the marker layer, wherein each fine stratification includes at least one reservoir, and the difference between reservoir characteristics of the reservoirs corresponding to each fine stratification is less than or equal to a preset threshold.

[0041] Specifically, each reservoir in the marker layer is distinguished according to its reservoir characteristics, and then each reservoir is finely stratified, wherein each fine stratification includes at least one reservoir. For example, when there are 15 reservoirs in the marker layer, they can be divided into 15 fine strata during fine stratification, or reservoirs with small differences in reservoir characteristics and adjacent to each other can be divided into the same fine stratification. For example, when there are 15 reservoirs in the marker layer, and the reservoir characteristics of the first 4 reservoirs are similar, the first 4 reservoirs can be divided into the same fine stratification. It should be noted that the difference between the reservoir characteristics of the reservoirs corresponding to each fine stratification is less than or equal to a preset threshold, that is, the selected range of adjacent reservoirs in the same fine stratification is limited. For example, when the difference in reservoir characteristics between adjacent reservoirs is less than or equal to 1, the adjacent reservoirs with a difference in reservoir characteristics less than or equal to 1 can be regarded as the same fine stratification. Among them, the preset threshold can be 1 or other values, and this embodiment does not limit this.

[0042] It should be noted that different types of reservoirs have different characteristic parameter values, and the size of each parameter comprehensively reflects the inherent characteristics of the reservoir. There are many types of reservoir characteristics, such as porosity, permeability, mud content, sand layer thickness, carbonate content, and horizontal principal stress, which are not limited in this embodiment.

[0043] Step 102: Determine the mechanical layers corresponding to each fine layer according to adjacent similar features, where each mechanical layer includes at least one fine layer.

[0044] Specifically, after multiple reservoirs are finely stratified, multiple fine strata are mechanically stratified. Each fine stratum also has corresponding reservoir characteristics. Based on similar adjacent characteristics and the reservoir characteristics corresponding to each fine stratum, the fine strata are mechanically stratified. Among them, adjacent similar characteristics, that is, adjacent different geological layers, may have similar mechanical properties, and they should be incorporated into the same geostress layer. When mechanical stratification is performed, the fine strata are also re-stratified based on this, and each mechanical stratification includes at least one fine stratum.

[0045] Step 103: Determine the temporary blocking layer corresponding to the mechanical layer according to similar adjacent features.

[0046] Specifically, the mechanical stratification is further stratified into temporary plugging stratification according to similar adjacent features. The temporary plugging stratification is to treat the strata by using temporary plugging agents, etc., and temporarily reduce the permeability between adjacent strata on both sides of the temporary plugging strata or temporarily plug high permeability oil layers.

[0047] Step 104, transform the temporary blocking layer.

[0048] Specifically, reservoir transformation is a series of engineering and technical measures taken on the reservoir to increase the production of oil and gas wells. It may include various media fracturing technologies or various matrix acidizing technologies, so that artificial fractures appear in the temporary plugging layers, thereby increasing the production of oil and gas wells.

[0049] Among them, by performing multiple stratifications on each reservoir and each layer according to the reservoir characteristics between them, more artificial fractures can be obtained when performing reservoir transformation compared with the reservoir transformation in the prior art. For example, in the prior art, temporary plugging materials are usually used for stratification before implementing production improvement transformation, and the temporary plugging materials can only be divided into 2-3 layers, and the number of layers is small. Performing 2-3 layers of temporary plugging stratification in thicker reservoirs cannot cover most of the reservoirs. In an embodiment of the present application, by stratifying the reservoir multiple times and performing temporary plugging stratification on the mechanical layers after completing the mechanical stratification, the embodiment of the present application can provide at least four artificial fractures when performing reservoir transformation, and can cover more reservoirs more evenly, thereby further increasing the production of oil and gas wells.

[0050] The embodiment of the present invention provides a composite segmentation method for transforming a thick reservoir in an ultra-deep gas reservoir, which obtains the reservoir characteristics of each reservoir in the marker layer, and finely stratifies each reservoir according to the reservoir characteristics, performs secondary stratification on the reservoir characteristics of the fine stratification by similar adjacent characteristics, determines the mechanical stratification corresponding to each fine stratification, and then re-stratifies the mechanical stratification into temporary plugging stratification, and finally performs stratified transformation on each temporary plugging stratification. Among them, by finely stratifying each reservoir, mechanically stratifying again according to the reservoir characteristics of the fine stratification, and finally temporarily plugging the mechanical stratification, and transforming within the temporary plugging stratification, the thick reservoir in the ultra-deep gas reservoir can achieve uniform transformation of the reservoir during transformation, and artificial fractures can cover most of the reservoir, and more expected artificial fractures can be obtained, so that the transformation of the thick reservoir is more sufficient, and a substantial increase in single well production can be achieved.

[0051] In order to enable those skilled in the art to more clearly understand the technical solution provided by the embodiment of the present invention, the method for composite segmentation of ultra-deep gas reservoir thick reservoir transformation provided by the embodiment of the present invention is described in detail through specific examples below. Figure 2 A schematic diagram of a composite segmentation method for transforming a thick reservoir in an ultra-deep gas reservoir provided by an embodiment of the present invention Figure 2 .like Figure 2 As shown, in another embodiment of the present invention, before determining the fine stratification corresponding to the reservoir in the marker layer according to the reservoir characteristics of each reservoir in the marker layer, the method further includes:

[0052] Step 201: Select a marker layer corresponding to a target layer from a geological research area; obtain reservoir characteristics of the marker layer, wherein the reservoir characteristics include horizontal principal stress of the reservoir.

[0053] It should be noted that the marker layer of the target layer in the geological study area is the reservoir to be measured, and the reservoir characteristics of the marker layer can be obtained by seismic exploration, gravity exploration, magnetic exploration, electrical exploration, geochemical exploration, geophysical logging and other methods. In this embodiment, the reservoir characteristics include the horizontal principal stress of the reservoir. There are differences in the distribution of geostress in the vertical and horizontal directions. The solution of the maximum and minimum horizontal principal stresses is an important key to solving the geostress problem. Summarizing the advantages and disadvantages of different research methods for the maximum or minimum horizontal principal stress is conducive to guiding the adaptation methods under different measurement environments, thereby improving the overall accuracy of geostress measurement and guiding the optimization of process parameters. Among them, the calculation or measurement method of geostress can be divided into direct measurement and indirect measurement, such as stress recovery method, stress relief method, strain recovery method, hydraulic fracturing method, etc., among which hydraulic fracturing method is relatively more applicable, and this embodiment does not limit this.

[0054] Optionally, the horizontal principal stress value of the reservoir is a minimum horizontal principal stress value of the reservoir.

[0055] When obtaining reservoir characteristics, the number of reservoirs is usually determined based on the logging interpretation results table, and the geostress is calculated based on the logging data. The minimum horizontal geostress is selected here. As shown in Table 1, 15 reservoirs are confirmed according to the logging interpretation results table, and the minimum horizontal geostress value of each reservoir is different.

[0056] Table 1 - Minimum horizontal geostress values ​​of well logging reservoirs

[0057] Logging reservoir Minimum horizontal ground stress value Reservoir 1 100 Reservoir 2 101 Reservoir 3 100 Reservoir 4 102 Reservoir 5 105 Reservoir 6 106 Reservoir 7 105 Reservoir 8 110 Reservoir 9 109 Reservoir 10 107 Reservoir 11 107 Reservoir 12 106 Reservoir 13 115 Reservoir 14 114 Reservoir 15 117

[0058] Optionally, according to the reservoir characteristics of each reservoir in the marker layer, the fine stratification corresponding to the reservoir in the marker layer is determined, specifically including:

[0059] According to the horizontal principal stress value of each reservoir, the fine layer corresponding to the reservoir in the marker layer is determined, wherein the difference between the horizontal principal stress values ​​of the reservoirs corresponding to each fine layer is less than or equal to a preset threshold.

[0060] In the process of fine stratification, reservoirs with similar and adjacent minimum horizontal stress values ​​are divided into the same fine layer according to the minimum horizontal stress value of each layer. As shown in Table 2, if the minimum horizontal stress values ​​of reservoirs 1 to 4 are in the range of 100 to 102, reservoirs 1 to 4 are divided into the same fine layer; similarly, 15 reservoirs are divided into 5 fine layers.

[0061] Table 2 - Well logging reservoir fine stratification table

[0062]

[0063] The difference between the horizontal principal stress values ​​of each reservoir corresponding to each fine layer is less than or equal to the preset threshold value. In the above data, the difference between the minimum horizontal principal stress values ​​of the reservoirs in the first fine layer is not greater than 2, and the difference between the minimum horizontal principal stress values ​​of the reservoirs in the second fine layer is not greater than 1. Each preset threshold value may be different in each fine layer, and the specific preset threshold value is determined according to the minimum horizontal stress value of each reservoir in the fine layer, which is not limited in this embodiment.

[0064] Optionally, determining the mechanical layer corresponding to each fine layer according to adjacent similar features specifically includes:

[0065] According to the minimum horizontal principal stress value corresponding to each reservoir in the same fine layer, the minimum horizontal principal stress value of the corresponding fine layer is obtained; according to the minimum horizontal principal stress value of each fine layer, multiple fine layers are determined as the same mechanical layer, wherein the difference between the minimum horizontal principal stress values ​​of each corresponding fine layer in the same mechanical layer is less than or equal to a preset threshold.

[0066] Specifically, after each reservoir is finely layered, the same fine layer includes several adjacent reservoirs. According to the reservoir characteristics of the reservoirs in the same fine layer, the reservoir characteristics corresponding to the same fine layer can be obtained. As shown in Table 3, the first fine layer has four reservoirs, and the minimum horizontal geostress value of each reservoir fluctuates between 100 and 102. At this time, the middle value 101 can be selected as the minimum horizontal geostress value of the first fine layer. Similarly, the second fine layer, the third fine layer, the fourth fine layer and the fifth fine layer are all related to the minimum horizontal geostress value of the corresponding reservoir, please refer to the data in the table below. In addition, after determining the minimum horizontal geostress value of each fine layer, each fine layer is mechanically layered. The same mechanical layer includes multiple fine layers, and the difference between the minimum horizontal principal stress values ​​of each fine layer corresponding to the same mechanical layer is less than or equal to the preset threshold.

[0067] Table 3 - Well logging reservoir mechanical stratification table

[0068]

[0069] Among them, mechanical stratification refers to stratification achieved by packers, and fine stratification is re-stratified by multiple packers. As shown in the above table, based on similar adjacent characteristics, the difference between the minimum horizontal stress values ​​of the first fine layer and the second fine layer is 4, so the first fine layer and the second fine layer are used as the first mechanical layer; the difference between the minimum horizontal stress values ​​of the third fine layer, the fourth fine layer and the fifth fine layer is 3 at the minimum and 8 at the maximum, so they can be used as the second mechanical layer.

[0070] Optionally, determining the temporary blocking layer corresponding to the mechanical layer according to similar adjacent features specifically includes:

[0071] According to the minimum horizontal principal stress value corresponding to each fine layer in the same mechanical layer, the fine layers of the selected layer in the mechanical layer are merged and layered, and multiple fine layers in the mechanical layer are determined as the same temporary blocking layer as the temporary blocking layer design in the mechanical layer; the fine layer analysis in each mechanical layer is completed, and the temporary blocking layer design is carried out for the mechanical layer as a whole.

[0072] It can be understood that determining multiple fine layers within the mechanical layer as the same layer of temporary blocking layer means re-stratifying the fine layers on the basis of the mechanical layer. As shown in Table 4, the first mechanical layer includes the first fine layer and the second fine layer. When the first mechanical layer is temporarily blocked, a temporary blocking layer is set at the junction between the first fine layer and the second fine layer in the first mechanical layer to complete the temporary blocking layer in the first mechanical layer. Similarly, when the second mechanical layer is temporarily blocked, it is re-stratified according to the fine layers in the second mechanical layer, and it is divided into upper and lower parts through the temporary blocking layer to complete the temporary blocking layer design of the entire mechanical layer.

[0073] Table 4- Well logging reservoir temporary plugging stratification table

[0074]

[0075] Optionally, merge and layer, including:

[0076] Each mechanical layer is divided into at least two temporary blocking layers.

[0077] In this embodiment, mechanical stratification divides 15 reservoirs into two mechanical strata. On the basis of mechanical stratification, the two mechanical strata are further temporarily plugged. The temporary plugging agent is introduced into the first mechanical strata to be divided into two upper and lower temporary plugging strata. The temporary plugging agent is introduced into the second mechanical strata to be divided into another two upper and lower temporary plugging strata. The two mechanical strata are still separated by mechanical stratification.

[0078] In this embodiment, by performing temporary plugging stratification again on the mechanical stratification, a greater number of temporary plugging stratification can be achieved compared to the prior art, and most of the reservoirs can be covered.

[0079] Optionally, the temporary plugging layer can be modified, including:

[0080] A reservoir transformation fracture is set for each temporary plugging layer.

[0081] Among them, reservoir transformation is a general term for a series of engineering and technical measures taken on the reservoir in order to increase the production of oil and gas wells or the injection volume of water injection wells. It mainly focuses on the reservoir characteristics and production conditions, and studies the economical and effective technical measures that are compatible with them to improve the connectivity between the wellbore and the reservoir, so as to achieve the purpose of increasing production and injection. Reservoir transformation technology mainly includes fracturing technology and matrix acidizing technology, etc., which produce reservoir transformation seams to increase reservoir production. In this embodiment, as shown in Table 5, there are 4 temporary plugging layers separated in the mechanical layer, and a reservoir transformation seam is designed in each temporary plugging layer, that is, 4 reservoir transformation seams are designed in the entire reservoir. Among them, the first reservoir transformation seam covers reservoir 1-reservoir 4, the second reservoir transformation seam covers reservoir 5-reservoir 7, the third reservoir transformation seam covers reservoir 8-reservoir 12, and the fourth reservoir transformation seam covers reservoir 13-reservoir 15.

[0082] Table 5 - Well logging reservoir artificial fracture design table

[0083]

[0084] It can be seen that, in this embodiment, the four reservoir transformation fractures cover most of the reservoir and achieve uniform transformation of the reservoir, thereby further improving the production of the oil and gas well.

[0085] Optionally, after the temporary plugging layer is transformed, it also includes:

[0086] Step 206: Perform multi-segment reservoir transformation on the mechanical stratification and temporary plugging stratification.

[0087] Among them, after the temporary plugging layer is transformed and designed, a reservoir transformation seam is set in each temporary plugging layer to ensure that most of the reservoir is covered; when the reservoir transformation design and construction is carried out, multi-segment reservoir transformation can be carried out on the mechanical layer and the temporary plugging layer in turn, so as to obtain more artificial fractures than expected, make the transformation of the extremely thick reservoir more complete, and achieve a substantial increase in single well production.

[0088] The embodiment of the present invention also provides a composite segmented device for transforming a thick reservoir in an ultra-deep gas reservoir. Figure 3 The present invention provides a schematic diagram of the structure of a composite segmented device for transforming a thick reservoir in an ultra-deep gas reservoir. Figure 3 As shown, the composite segmented device 300 for transforming the ultra-deep gas reservoir with thick layers includes:

[0089] The formation acquisition module 301 is used to select a marker layer corresponding to a target layer from a geological research area and obtain reservoir characteristics of the marker layer;

[0090] A fine stratification module 302 is used to determine the fine stratification corresponding to the reservoir in the marker layer according to the reservoir characteristics of each reservoir in the marker layer, wherein each fine stratification includes at least one reservoir, and the difference between the reservoir characteristics of the reservoirs corresponding to the fine stratifications is less than or equal to a preset threshold;

[0091] A mechanical layering module 303, used to determine the mechanical layer corresponding to each fine layer according to adjacent similar features, each mechanical layer including at least one fine layer;

[0092] A temporary blocking layer module 304 is used to determine the temporary blocking layer corresponding to the mechanical layer according to similar adjacent features;

[0093] The formation transformation module 305 is used to transform the temporary plugging layer.

[0094] Optionally, the formation acquisition module 301 may be specifically used for:

[0095] According to the sequence of geological strata, a geological stratum with stratigraphic characteristics is selected from the geological strata located in the geological research area as the target stratum, and the stratigraphic characteristics of the target stratum are obtained, a well logging interpretation result table is obtained, and the number of reservoirs is determined.

[0096] Optionally, the fine stratification module 302 may be specifically used for:

[0097] According to the minimum horizontal principal stress value of each reservoir in the well logging interpretation result table obtained by the formation acquisition module 301, reservoirs with similar and adjacent minimum horizontal principal stress values ​​are divided into one layer, completing the fine stratification of the reservoir.

[0098] Optionally, the mechanical delamination module 303 may be specifically used for:

[0099] The fine layers divided by the fine layering module 302 are re-layered according to adjacent similar features, and the number of fine layers is divided as mechanical layers.

[0100] Optionally, the temporary blocking layering module 304 may be specifically used for:

[0101] The fine layers within each mechanical layer are analyzed and processed, and based on the similar adjacent characteristics of the minimum horizontal stress values, the fine layers within the mechanical layer are merged and layered as the temporary plugging layer design within the mechanical layer.

[0102] Optionally, the formation transformation module 305 may be specifically used for:

[0103] Reservoir transformation fractures are designed in each temporary plugging layer to ensure that the reservoir transformation fractures cover most of the reservoir.

[0104] This embodiment is used to implement the above-mentioned method embodiments. The working process and working principle of each unit in this embodiment refer to the description in the above-mentioned method embodiments, which will not be repeated here.

[0105] The embodiment of the present invention provides a composite segmentation device for transforming thick reservoirs in ultra-deep gas reservoirs. The marker layer of the target layer is selected through the formation acquisition module and the logging interpretation result table is obtained. The reservoir is finely stratified through the fine stratification module, so that each reservoir is divided according to similar adjacent features, and the fine stratification is re-stratified through the mechanical stratification module. The mechanical stratification is then designed through the temporary plugging module, so that the temporary plugging stratification is transformed through the formation transformation module. The present invention provides a new composite segmentation technology for transforming thick reservoirs in ultra-deep gas reservoirs, so that the thick reservoirs in ultra-deep gas reservoirs can be uniformly transformed during the transformation, and artificial fractures can cover most of the reservoirs, and more expected artificial fractures can be obtained, so that the transformation of the thick reservoirs is more complete, and a substantial increase in production of a single well can be achieved.

[0106] The present invention also provides a composite segmentation device for transforming a thick reservoir in an ultra-deep gas reservoir, see Figure 4 As shown, the embodiment of the present invention is only Figure 4 This is just an example for explanation, and it does not mean that the present invention is limited to this.

[0107] Figure 4 A schematic diagram of the hardware structure of a composite segmentation device for transforming a thick reservoir in an ultra-deep gas reservoir according to an embodiment of the present invention is provided. Figure 4 As shown, the composite segmentation equipment 400 for transforming the ultra-deep gas reservoir thick reservoir provided in this embodiment includes:

[0108] Memory 401;

[0109] at least one processor 402; and

[0110] Computer programs;

[0111] Among them, the computer program is stored in the memory 401 and is configured to be executed by the processor 402 to implement the technical solution of any of the aforementioned method embodiments. Its implementation principle and technical effect are similar and will not be repeated here.

[0112] Optionally, the memory 401 may be independent or integrated with the processor 402 .

[0113] When the memory 401 is a device independent of the processor 402, the ultra-deep gas reservoir thick reservoir reconstruction composite segmentation device 400 further includes:

[0114] The bus 403 is used to connect the memory 401 and the processor 402 .

[0115] The embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, and the computer program is executed by the processor 402 to implement the various steps executed by the composite segmentation device 400 for transforming a thick reservoir in an ultra-deep gas reservoir in the above method embodiment.

[0116] 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 (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 by a hardware processor or implemented by a combination of hardware and software modules in the processor.

[0117] The memory may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk memory, and may also be a USB flash drive, a mobile hard disk, a read-only memory, a magnetic disk or an optical disk, etc.

[0118] 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.

[0119] The above storage medium 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 storage medium can be any available medium that can be accessed by a general or special purpose computer.

[0120] An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the storage medium can also exist as discrete components in an electronic device or a main control device.

[0121] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. Each unit may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite segmentation method for ultra-deep gas reservoir thick reservoir reconstruction, characterized in that: The following steps are involved: Determine, according to the reservoir characteristics of each reservoir in the marker layer, a fine layer corresponding to the reservoir in the marker layer, wherein each fine layer includes at least one reservoir, and the difference between the reservoir characteristics of the reservoirs corresponding to each fine layer is less than or equal to a preset threshold; Determine the mechanical layers corresponding to each of the fine layers according to adjacent similar features, each of the mechanical layers including at least one of the fine layers; Determine the temporary blocking layer corresponding to the mechanical layer according to adjacent similar features; Transforming the temporary plugging layer; Before determining the fine stratification corresponding to the reservoir in the marker layer according to the reservoir characteristics of each reservoir in the marker layer, the method further includes: selecting a marker layer corresponding to the target layer from the geological research area; Obtaining reservoir characteristics of the marker layer, wherein the reservoir characteristics include horizontal principal stress of the reservoir; Determining the fine stratification corresponding to the reservoir in the marker layer according to the reservoir characteristics of each reservoir in the marker layer specifically includes: Determine the fine stratification corresponding to the reservoir in the marker layer according to the horizontal principal stress value of each of the reservoirs, wherein the difference between the horizontal principal stress values ​​of the reservoirs corresponding to each of the fine stratifications is less than or equal to a preset threshold; The horizontal principal stress value of the reservoir is the minimum horizontal principal stress value of the reservoir; Determining the mechanical layer corresponding to each of the fine layers according to the adjacent similar features specifically includes: According to the minimum horizontal principal stress value corresponding to each reservoir in the same fine layer, the minimum horizontal principal stress value corresponding to the fine layer is obtained; According to the minimum horizontal principal stress values ​​of the respective fine layers, the plurality of fine layers are determined as the same layer of mechanical layers, wherein the difference between the minimum horizontal principal stress values ​​of the respective fine layers in the same layer of mechanical layers is less than or equal to a preset threshold; Determining the temporary blocking layer corresponding to the mechanical layer according to the adjacent similar features specifically includes: According to the minimum horizontal principal stress value corresponding to each of the fine layers in the same mechanical layer, the fine layers of the selected layer in the mechanical layer are merged and layered, and the multiple fine layers in the mechanical layer are determined as the temporary blocking layer of the same layer.

2. The composite segmentation method for ultra-deep gas reservoir thick reservoir reconstruction according to claim 1 is characterized in that: The merging and stratification specifically includes: Each of the mechanical layers is divided into at least two temporary blocking layers.

3. The composite segmentation method for ultra-deep gas reservoir thick reservoir reconstruction according to claim 1 is characterized in that: The transformation of the temporary blocking layer specifically includes: A reservoir transformation fracture is set for each temporary plugging layer.

4. The method according to claim 3, characterized in that After the temporary blocking layer is transformed, the method further includes: Multi-stage reservoir transformation is performed on the mechanical stratification and the temporary plugging stratification.

5. A composite segmented device for transforming ultra-deep gas reservoirs with thick layers, characterized in that: include: A formation acquisition module is used to select a marker layer corresponding to a target layer from a geological research area and obtain reservoir characteristics of the marker layer; A fine stratification module, used to determine the fine stratification corresponding to the reservoir in the marker layer according to the reservoir characteristics of each reservoir in the marker layer, wherein each fine stratification includes at least one reservoir, and the difference between the reservoir characteristics of the reservoirs corresponding to each fine stratification is less than or equal to a preset threshold; A mechanical layering module, used for determining the mechanical layers corresponding to each of the fine layers according to adjacent similar features, each of the mechanical layers including at least one of the fine layers; A temporary blocking and diverting layering module, used for determining the temporary blocking layer corresponding to the mechanical layering according to adjacent similar features; A stratum transformation module, used for transforming the temporary plugging layer; The fine stratification module is also used to select a marker layer corresponding to a target layer from a geological research area; obtain reservoir characteristics of the marker layer, wherein the reservoir characteristics include the horizontal principal stress of the reservoir; The fine stratification module is further used to determine the fine stratification corresponding to the reservoir in the marker layer according to the horizontal principal stress value of each of the reservoirs, wherein the difference between the horizontal principal stress values ​​of the reservoirs corresponding to each of the fine stratifications is less than or equal to a preset threshold value; The mechanical stratification module is further used to obtain the minimum horizontal principal stress value corresponding to the fine stratification according to the minimum horizontal principal stress value corresponding to each reservoir in the same fine stratification; The mechanical stratification module is further used to determine the plurality of fine strata as the same layer of mechanical strata according to the minimum horizontal principal stress values ​​of the respective fine strata, wherein the difference between the minimum horizontal principal stress values ​​of the corresponding fine strata in the same layer of mechanical strata is less than or equal to a preset threshold; The temporary blocking and diversion stratification module is also used to merge and stratify the fine strata of the selected layer in the mechanical stratification according to the minimum horizontal principal stress value corresponding to each fine stratification in the same mechanical stratification, and determine the multiple fine strata in the mechanical stratification as the temporary blocking stratification of the same layer.

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