Deep low-permeability sandstone reservoir treatment method, device, equipment and medium

Abstract

The invention relates to the technical field of oil-gas exploration and development, and discloses a deep low-permeability sandstone reservoir treatment method, device, equipment and medium, which can perform basic geological analysis on a deep low-permeability sandstone reservoir to generate macroscopic geological information. The method comprises the following steps: carrying out fine characterization treatment on a rock structure and a pore structure on a rock sample of a sedimentary microfacies in a deep low-permeability sandstone reservoir to obtain structural characterization information; performing diagenesis, pore-forming evolution law and dynamical mechanism analysis on the rock sample to obtain rock analysis information; determining a diagenesis transformation mechanism of the high-quality sedimentary microfacies in the deep low-permeability sandstone reservoir according to the structural characterization information and the rock analysis information; and based on the macrogeological information and the diagenetic transformation mechanism, establishing a differential quality reservoir cause mode of the deep low-permeability sandstone reservoir. The difference quality reservoir cause mode established by the invention can provide theoretical basis and guidance for searching high-quality reservoirs, and is beneficial to improving the success rate and benefit of oil-gas exploration and development.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas exploration and development, and in particular to a method, device, equipment and medium for treating a deep low-permeability sandstone reservoir. Background Art

[0002] As the supply of oil and gas resources becomes increasingly tight, with the deepening of shallow oil and gas exploration and development, the difficulty is increasing, and it has become an inevitable trend to shift the focus to deep layers.

[0003] Deep resources have great potential, but most of them have undergone complex evolutionary processes and strong diagenetic transformation. It is difficult to find relatively high-quality reservoirs under the background of deep burial, strong heterogeneity, and low porosity and permeability.

[0004] Therefore, there is an urgent need for a reservoir processing method that helps to find relatively high-quality reservoirs. Summary of the invention

[0005] The present invention provides a deep low-permeability sandstone reservoir processing method, device, equipment and medium to solve the defect of the related technology that it is difficult to find relatively high-quality reservoirs. The established differential quality reservoir genesis model can provide a theoretical basis and guidance for finding high-quality reservoirs, which is helpful to improve the success rate and benefits of oil and gas exploration and development.

[0006] In a first aspect, the present invention provides a method for treating a deep low-permeability sandstone reservoir, comprising: Conduct basic geological analysis of deep low-permeability sandstone reservoirs to generate macroscopic geological information; Performing fine characterization of rock fabric and pore structure on rock samples of sedimentary microfacies in the deep low-permeability sandstone reservoir to obtain structural characterization information; and analyzing the diagenesis, pore formation evolution law and dynamic mechanism of the rock samples to obtain rock analysis information; Determining the diagenetic transformation mechanism of the high-quality sedimentary microfacies in the deep low-permeability sandstone reservoir based on the structural characterization information and the rock analysis information; Based on the macroscopic geological information and the diagenetic transformation mechanism, a differential quality reservoir genesis model of the deep low-permeability sandstone reservoir is established.

[0007] Optionally, the basic geological analysis of the deep low-permeability sandstone reservoir to generate macroscopic geological information includes: Analyzing the structural evolution history and thermal burial history of the deep low-permeability sandstone reservoir to determine geological background information, wherein the geological background information includes reservoir diagenesis, pore formation and reservoir formation paleogeological background information; Conducting sedimentary environment analysis and core characterization on the deep low-permeability sandstone reservoir to determine the sedimentary microfacies type in the deep low-permeability sandstone reservoir; Conducting X-ray diffraction quantitative analysis on the deep low-permeability sandstone reservoir to identify the whole-rock mineral composition information; Conducting porosity and permeability tests on the deep low-permeability sandstone reservoir to determine the physical property characteristics of the main sedimentary microphases in the deep low-permeability sandstone reservoir; Determine basic information on production capacity by combining well logging, mud logging and drill pipe formation testing for the deep low-permeability sandstone reservoir; The geological background information, the sedimentary microfacies type, the whole rock mineral component information, the main sedimentary microfacies physical property characteristics and the basic production capacity information are determined as the macroscopic geological information.

[0008] Optionally, the rock sample of the sedimentary microfacies in the deep low-permeability sandstone reservoir is subjected to fine characterization processing of rock fabric and pore structure to obtain structural characterization information, including: Performing multi-scale heterogeneity characterization on the rock sample to obtain corresponding characterization information, wherein the characterization information includes objective structural, texture and composition characteristics of typical sedimentary microfacies in the deep low-permeability sandstone reservoir; Performing mineral genesis type and fabric characteristics analysis based on the rock sample to determine corresponding mineral analysis information, wherein the mineral analysis information includes mineral type, element characteristics, primary and secondary genesis and differential fabric characteristics of the same mineral; Classifying and quantitatively characterizing mineral pores according to the rock sample to obtain mineral classification information and quantitative information; The characterization information, the mineral analysis information, the mineral classification information and the quantification information are determined as the structural characterization information.

[0009] Optionally, the rock samples are subjected to diagenesis, pore formation evolution law and dynamic mechanism analysis to obtain rock analysis information, including: Conducting fluid inclusion analysis, optical microscopy and electron microscopy observations on the rock samples to determine corresponding analytical observation information, wherein the analytical observation information includes diagenetic difference characteristics, diagenetic types, sequences and paleo-temperature and pressure conditions of the sedimentary microfacies; Based on the rock samples, the water-rock reaction mechanism of fluid and rock mineral is analyzed to obtain chemical information associated with diagenetic characteristics and pore morphology, and determine the causal mechanism of the main diagenetic events; Based on the rock samples, the diagenetic phase types and pore difference evolution characteristics are analyzed to determine the pore difference evolution characteristics between diagenetic phases; The analytical observation information, the chemical information, the causal mechanism of the main diagenetic events and the differential evolution characteristics of the pores between the diagenetic phases are determined as the rock analysis information.

[0010] Optionally, determining the diagenetic transformation mechanism of the high-quality sedimentary microfacies in the deep low-permeability sandstone reservoir according to the structural characterization information and the rock analysis information includes: Determining the sedimentary factors of the sedimentary microfacies according to the structural characterization information, and determining the diagenetic factors of the sedimentary microfacies according to the rock analysis information; Based on the sedimentary factors, the control effect analysis of the development of high-quality sedimentary microfacies is carried out to obtain effect analysis information; and based on the diagenetic factors, the transformation mechanism analysis of high-quality sedimentary microfacies is carried out to obtain transformation mechanism information; The diagenetic transformation mechanism is determined according to the action analysis information and the transformation mechanism information.

[0011] Optionally, the high-quality sedimentary microfacies development control analysis based on the sedimentary factors to obtain the effect analysis information includes: Based on the above sedimentary factors, the physical property differences between similar diagenetic backgrounds and different sedimentary microfacies are compared to clarify the high-quality sedimentary microfacies types under the control of structure, texture and composition, and serve as the above-mentioned action analysis information; The high-quality sedimentary microfacies transformation mechanism analysis based on the diagenetic factors to obtain transformation mechanism information includes: Based on the diagenetic factors, the physical property differences of different diagenetic phases of high-quality sedimentary microfacies are compared, and the diagenetic transformation mechanism of temperature, pressure and fluid on high-quality sedimentary microfacies is clarified, and used as the transformation mechanism information.

[0012] Optionally, the establishing of a differential quality reservoir genesis model of the deep low-permeability sandstone reservoir based on the macroscopic geological information and the diagenetic transformation mechanism includes: In combination with the macroscopic geological information and the diagenetic transformation mechanism, the effectiveness of different diagenetic phase reservoirs within the sedimentary microfacies in the deep low-permeability sandstone reservoir is determined and used as the genetic model of the differential quality reservoirs; wherein the effectiveness includes high quality, effective and / or dense.

[0013] In a second aspect, the present invention provides a deep low-permeability sandstone reservoir processing device, comprising: Geological analysis unit, used to conduct basic geological analysis of deep low-permeability sandstone reservoirs to generate macroscopic geological information; A characterization processing unit is used to perform fine characterization processing of rock fabric and pore structure on rock samples of sedimentary microfacies in the deep low-permeability sandstone reservoir to obtain structural characterization information; A mechanism analysis unit, used to analyze the diagenesis, pore formation evolution law and dynamic mechanism of the rock sample to obtain rock analysis information; a mechanism determination unit, for determining the diagenetic transformation mechanism of the high-quality sedimentary microfacies in the deep low-permeability sandstone reservoir according to the structural characterization information and the rock analysis information; A model building unit is used to build a differential quality reservoir genesis model of the deep low permeability sandstone reservoir based on the macro geological information and the diagenetic transformation mechanism.

[0014] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the deep low-permeability sandstone reservoir processing method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0015] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method for processing a deep low-permeability sandstone reservoir according to the first aspect or any corresponding embodiment thereof.

[0016] The deep low-permeability sandstone reservoir processing method, device, equipment and medium provided by the present invention can perform basic geological analysis on deep low-permeability sandstone reservoirs to generate macroscopic geological information; perform fine characterization of rock fabric and pore structure on rock samples of sedimentary microfacies in deep low-permeability sandstone reservoirs to obtain structural characterization information; and perform diagenetic and pore-forming evolution laws and dynamic mechanism analysis on rock samples to obtain rock analysis information; determine the diagenetic transformation mechanism of high-quality sedimentary microfacies in deep low-permeability sandstone reservoirs based on structural characterization information and rock analysis information; and establish a differential quality reservoir genesis model for deep low-permeability sandstone reservoirs based on macroscopic geological information and diagenetic transformation mechanism. The differential quality reservoir genesis model established by the present invention can provide a theoretical basis and guidance for finding high-quality reservoirs, and help improve the success rate and benefits of oil and gas exploration and development. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or 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.

[0018] Figure 1 A flowchart of a deep low-permeability sandstone reservoir treatment method provided by an embodiment of the present invention; Figure 2 A schematic diagram of a technical route for a deep low-permeability sandstone reservoir treatment method provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a deep low-permeability sandstone reservoir treatment device provided by an embodiment of the present invention; Figure 4A schematic diagram of the structure of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0020] In order to solve the defect of the difficulty in finding relatively high-quality reservoirs in related technologies, the deep low-permeability sandstone reservoir processing method, device, equipment and medium provided in this embodiment can perform basic geological analysis on deep low-permeability sandstone reservoirs to generate macroscopic geological information; perform fine characterization of rock fabric and pore structure on rock samples of sedimentary microfacies in deep low-permeability sandstone reservoirs to obtain structural characterization information; and analyze the diagenetic and pore-forming evolution laws and dynamic mechanisms of rock samples to obtain rock analysis information; determine the diagenetic transformation mechanism of high-quality sedimentary microfacies in deep low-permeability sandstone reservoirs based on structural characterization information and rock analysis information; and establish a differential quality reservoir genesis model for deep low-permeability sandstone reservoirs based on macroscopic geological information and diagenetic transformation mechanisms. The differential quality reservoir genesis model established by the present invention can provide a theoretical basis and guidance for finding high-quality reservoirs, and help improve the success rate and benefits of oil and gas exploration and development.

[0021] Combine the following Figure 1-Figure 2 The present invention describes a method for treating a deep low-permeability sandstone reservoir.

[0022] like Figure 1 As shown, this embodiment proposes a first method for treating a deep low-permeability sandstone reservoir, which may include the following steps: S101. Conduct basic geological analysis on deep low-permeability sandstone reservoirs to generate macroscopic geological information.

[0023] Optionally, step S101 may include: Analyze the structural evolution history and thermal burial history of deep low-permeability sandstone reservoirs to determine the geological background information, including reservoir diagenesis, pore formation and reservoir formation paleogeological background information; Conduct sedimentary environment analysis and core characterization on deep low-permeability sandstone reservoirs to determine the sedimentary microfacies types in deep low-permeability sandstone reservoirs; Conduct quantitative X-ray diffraction analysis on deep low-permeability sandstone reservoirs to identify the mineral composition information of the whole rock; Conduct porosity and permeability tests on deep low-permeability sandstone reservoirs to determine the physical properties of the main sedimentary microfacies in deep low-permeability sandstone reservoirs; Combine logging, mud logging and drill pipe formation testing for deep low-permeability sandstone reservoirs to determine basic information on production capacity; The geological background information, sedimentary microfacies types, whole-rock mineral composition information, physical properties of the main sedimentary microfacies and basic information on production capacity are identified as macroscopic geological information.

[0024] Specifically, this embodiment can carry out basic geological work in deep reservoirs.

[0025] Among them, in carrying out basic geological work on deep reservoirs, this embodiment can identify the paleogeological background of reservoir diagenesis, pore formation and reservoir formation through analysis of tectonic evolution history and thermal burial history, and divide the main sedimentary microfacies of Pinghu Formation sandstone, such as estuary bars, underwater diversion channels, tidal channels, sand flats and mixed flats, through comprehensive logging, mud logging, DST capacity testing, and obtain basic information such as daily oil, gas and water production and formation pressure.

[0026] S102. Perform detailed characterization of rock fabric and pore structure on rock samples of sedimentary microfacies in deep low-permeability sandstone reservoirs to obtain structural characterization information.

[0027] Optionally, step S102 may include: Perform multi-scale heterogeneity characterization on rock samples to obtain corresponding characterization information, including objective structural, texture and composition characteristics of typical sedimentary microfacies in deep low-permeability sandstone reservoirs; Analyze the mineral genesis type and fabric characteristics based on rock samples to determine the corresponding mineral analysis information, which includes mineral type, element characteristics, primary and secondary genesis of the same mineral, and differential fabric characteristics; Classify and quantify mineral pores based on rock samples to obtain mineral classification and quantitative information; Characterization information, mineral analysis information, mineral classification information and quantification information are identified as structural characterization information.

[0028] Specifically, in the characterization of multi-scale heterogeneity, this embodiment can carry out continuous transition characterization from macroscopic sedimentary structural characteristics to micro-regional matrix surface distribution through core description, optical microscopy observation, combined with electron microscopy imaging stitching and in-situ energy spectrum identification, to identify the objective structure, structure and composition characteristics of typical sedimentary microfacies.

[0029] Specifically, in the present embodiment, when analyzing the mineral genesis type and structural characteristics, the combined technology of cathode luminescence, electron microscopy and energy spectrum can be used to accurately determine the mineral type and element characteristics, distinguish between the primary and secondary genesis of the same mineral and clarify the different structural characteristics.

[0030] Specifically, in the classification and quantitative characterization of mineral pores, this embodiment can be based on heterogeneity characterization, and by statistically analyzing the stable distribution intervals of mineral micro-regions, construct a characterization surface (stratification) to meet the characterization quantitative requirements; through the identification and extraction of minerals and associated pores (surface content, quantity, surface ratio and pore size), the characterization classification requirements can be met to obtain mineral classification information and quantitative information.

[0031] It should be noted that in the present embodiment, during the process of fine characterization of rock fabric and pore structure, the following process may be performed: (1) Conduct detailed observation and description of cores of typical sedimentary microfacies, characterize the heterogeneity characteristics of the core scale (centimeter) based on the spatial variation of sedimentary structural characteristics such as lithology, color, and grain size at the core scale, and classify several bedding types (massive, layered, and laminated combinations) at the core scale; (2) The samples were made into rock slices and single-sided argon ion polished to achieve the same-field observation of optical microscopy (single polarized light + orthogonal light) and electrical microscopy (surface energy spectrum + backscattering + secondary electrons + cathode luminescence); (3) Determine the core scale bedding type. If it is layered or laminated, an optical microscope is required to identify and count the rhythmic combination, density, and thickness of the laminates, quantitatively characterize the laminated combination characteristics, and characterize the optical microscope scale (mm); heterogeneity characteristics; if it is massive bedding, it is determined to be homogeneous, and observation and statistics (particles, interstitial materials, particle size, and sorting) can be directly performed under an electrical microscope; (4) The detailed characterization of mineral fabric and pore structure is based on the bedding type as the statistical unit, which serves as the hub of the core scale (cm), optical microscope scale (mm), and electron microscope scale (micrometer), so as to achieve a continuous transition characterization from macroscopic (centimeter scale) to microscopic (micrometer scale) and systematically characterize the multi-scale heterogeneity of low-permeability sandstone; (5) Use the combined technique of cathodoluminescence-electron microscopy-energy spectrum to accurately determine the mineral type and elemental characteristics using energy spectrum, and combine cathodoluminescence to distinguish the primary and secondary origins of the same mineral; (6) On this basis, the origin and structure of sedimentary minerals and the origin and structure of diagenetic minerals are refined through the mineral morphology under electron microscope, and the origin and structure of minerals are clarified, such as whether quartz is terrigenous quartz, secondary enlarged quartz, or secondary microcrystalline quartz; (7) Use electron microscope imaging stitching technology to achieve compatibility between large field of view and high resolution, and simultaneously combine the in-situ surface energy spectrum of the micro-region to construct a micro-region characterization surface (characterization surface: the matrix distribution is unstable when it is smaller than this field of view, and the matrix distribution is stable and unchanged when it is larger than this field of view), to meet quantitative statistical needs (representative); (8) Within the characterization domain, image processing software is used to distinguish, identify and extract microscopic reservoir minerals and pores based on the differences in energy spectrum color and electron microscope grayscale to meet the needs of classification statistics; the surface information of minerals and pores in the micro-region is identified, such as mineral surface content, pore number, surface ratio, pore size and other attribute parameters, to clarify the surface characteristics of minerals and pores in the micro-region.

[0032] S103. Analyze the diagenesis, pore formation evolution law and dynamic mechanism of the rock samples to obtain rock analysis information.

[0033] Optionally, step S103 may include: Conduct fluid inclusion analysis, optical microscopy and electron microscopy observations on rock samples to determine the corresponding analytical observation information, including the diagenetic difference characteristics, diagenetic type, sequence and paleo-temperature and pressure conditions of sedimentary microfacies; Analyze the water-rock reaction mechanism of fluids and rocks based on rock samples to obtain chemical information associated with diagenetic characteristics and pore morphology, and determine the causal mechanism of major diagenetic events; Analyze the diagenetic phase type and pore difference evolution characteristics based on rock samples to determine the pore difference evolution characteristics between diagenetic phases; The analytical observation information, chemical information, the causal mechanisms of major diagenetic events and the evolutionary characteristics of pore differences between diagenetic phases are determined as rock analysis information.

[0034] Specifically, this embodiment can perform diagenetic difference and diagenetic sequence characteristic analysis. In the process of performing diagenetic difference and diagenetic sequence characteristic analysis, fluid inclusion analysis, optical microscopy, and electron microscopy observations can be used to clarify the diagenetic difference characteristics, diagenetic type, sequence, and paleotemperature and pressure conditions of the same sedimentary microfacies.

[0035] Specifically, in the analysis of the water-rock reaction mechanism between fluids and rocks and minerals, this embodiment can use micro-area in-situ Raman, isotope, and element testing to obtain chemical information associated with diagenetic characteristics and pore morphology, and determine the causal mechanism of major diagenetic events.

[0036] Specifically, in the present embodiment, when conducting a study on diagenetic phase types and pore difference evolution characteristics, the diagenetic phase types of the same sedimentary microphase can be divided through the study of diagenetic types, diagenetic differences, and water-rock reaction mechanisms, combined with the static characterization of pore structure, to clarify the pore difference evolution characteristics between diagenetic phases.

[0037] Specifically, in this embodiment, the following process may be performed in the study of diagenesis, pore formation evolution law and dynamic mechanism: (1) Taking the same sedimentary microfacies as the basic research unit, using the same sample or parallel samples that have been finely characterized as the test object, capturing the fluid inclusion information in the sample, restoring the ancient temperature and ancient pressure conditions, and clarifying the time and environment of the diagenetic event; (2) Through the combination of cathodoluminescence-electron microscopy-energy spectrum and photoelectric combination, the diagenetic types and sequence combinations of compaction, cementation, dissolution, etc. experienced during the diagenetic process of the same sedimentary microfacies can be clarified, and the diagenetic types and diagenetic difference characteristics within the same sedimentary microfacies can be identified; (3) Through in-situ laser Raman, energy spectrum and probe in micro-areas under the microscope, isotopes, major elements and trace elements are obtained, and the water-rock reaction mechanism of fluid and rock minerals in the main diagenetic events is clarified by integrating the microscopic diagenetic phenomena and associated pore morphology, such as the determination of fluid source (organic acid, hydrothermal fluid, atmospheric water), the source of quartz secondary enlarged silica at different stages, and the source of calcium in multi-stage and polymorphic carbonate cements; (4) Based on the diagenetic type and diagenetic difference characteristics of the same sedimentary microfacies, the diagenetic facies type of the same sedimentary microfacies is classified from the perspective of genesis, combined with the determination of the water-rock reaction mechanism of the diagenetic event; (5) Based on the classified and quantitative pore attribute parameters, the pore development and extinction process of different diagenetic phase types within the same sedimentary microfacies is restored through formula calculation method, and the differences in pore evolution characteristics between different diagenetic phases are compared.

[0038] S104. Determine the diagenetic transformation mechanism of high-quality sedimentary microfacies in deep low-permeability sandstone reservoirs based on structural characterization information and rock analysis information.

[0039] Optionally, step S104 may include: Determine the sedimentary factors of sedimentary microfacies based on structural characterization information, and determine the diagenetic factors of sedimentary microfacies based on rock analysis information; Based on sedimentary factors, the control effect analysis of high-quality sedimentary microfacies development is carried out to obtain effect analysis information; and based on diagenetic factors, the transformation mechanism analysis of high-quality sedimentary microfacies is carried out to obtain transformation mechanism information; The diagenetic transformation mechanism is determined based on the action analysis information and transformation mechanism information.

[0040] Optionally, the above-mentioned high-quality sedimentary microfacies development control analysis based on sedimentary factors is performed to obtain effect analysis information, including: Based on sedimentary factors, the physical property differences of similar diagenetic backgrounds and different sedimentary microfacies are compared to clarify the high-quality sedimentary microfacies types controlled by structure, texture and composition, and use them as information for action analysis.

[0041] The above-mentioned high-quality sedimentary microfacies transformation mechanism analysis based on diagenetic factors is used to obtain transformation mechanism information, including: Based on diagenetic factors, the physical property differences of different diagenetic phases of high-quality sedimentary microfacies are compared, and the diagenetic transformation mechanism of temperature, pressure and fluid on high-quality sedimentary microfacies is clarified and used as the transformation mechanism information.

[0042] Specifically, in analyzing the control of sedimentary factors on the development of high-quality sedimentary microfacies, this embodiment can compare the differences in physical properties of similar diagenetic backgrounds and different sedimentary microfacies, and clarify the types of high-quality sedimentary microfacies controlled by structure, structure, and composition.

[0043] Specifically, in the present embodiment, when analyzing the mechanism of diagenetic factors on the transformation of high-quality sedimentary microfacies, the physical property differences of different diagenetic phases of high-quality sedimentary microfacies can be compared, and the diagenetic transformation mechanism of temperature, pressure, and fluid on high-quality sedimentary microfacies can be clarified.

[0044] Specifically, this embodiment can compare the surface mineral fabrics, surface pore properties and porosity and permeability differences of similar diagenetic backgrounds and different sedimentary microfacies, clarify the influence mechanism of composition (particles, fillings), structure (grain size, sorting), texture (stratification, laminar combination) and other lithological conditions that are conducive to preserving primary pores and forming secondary pores on pore evolution, illustrate the control of sedimentary factors on the development of high-quality sedimentary microfacies, and clarify the types of high-quality sedimentary microfacies.

[0045] Specifically, this embodiment can compare the surface mineral structure, surface pore properties and porosity and permeability differences of the same sedimentary microfacies with different diagenetic backgrounds, clarify the influence mechanism of geological conditions such as abnormal temperature, abnormal pressure, and fluids with different properties on pore development that overcome primary pore loss and promote secondary pore development, and clarify the transformation mechanism of diagenetic factors on high-quality sedimentary microfacies.

[0046] S105. Based on macroscopic geological information and diagenetic transformation mechanism, a reservoir genesis model of different qualities of deep low-permeability sandstone reservoirs is established.

[0047] Optionally, step S105 may include: Combining macroscopic geological information and diagenetic transformation mechanisms, the effectiveness of different diagenetic facies reservoirs within sedimentary microfacies in deep low-permeability sandstone reservoirs is determined and used as a genetic model for reservoirs of different qualities; among which effectiveness includes high-quality, effective and / or dense.

[0048] Specifically, in the process of establishing the genetic model of reservoirs with different qualities, this embodiment can integrate the macro geological background, micro diagenetic pore formation dynamic mechanism and production capacity test to clarify the effectiveness of reservoirs of different diagenetic phases in the same sedimentary microphase. The effectiveness can include high quality, effectiveness and density.

[0049] Specifically, this embodiment can integrate the macro geological background (tectonic evolution history, thermal burial history), micro diagenetic pore-forming dynamic mechanism and production capacity test, establish the correspondence between the diagenetic phase type and production capacity after the transformation of high-quality sedimentary microfacies, divide the dominant, effective and tight reservoir types, establish the genetic model of reservoirs with different qualities, and guide further exploration and development in the study area.

[0050] It is understandable that the differential quality reservoir genesis model established in this embodiment can be used to clarify the formation conditions of high-quality reservoirs and understand which factors are conducive to the development of high-quality reservoirs under a specific geological environment. For example, a specific sedimentary phase belt may be conducive to the formation of reservoirs with good physical properties, and a specific diagenesis may increase the porosity and permeability of the reservoir. It can also be used to predict the distribution of high-quality reservoirs. According to the laws summarized in the genesis model, the possible distribution areas of high-quality reservoirs can be predicted in the study area. This helps to narrow the exploration scope and improve exploration efficiency. It can also be used to guide exploration and development strategies. Knowing the formation conditions and distribution laws of high-quality reservoirs, more targeted exploration and development strategies can be formulated. For example, in the exploration stage, we can focus on areas with high-quality reservoir development conditions; in the development stage, we can adopt different development methods according to the differences in reservoir quality to improve oil and gas recovery. It can also be used to reduce exploration risks. Through an in-depth understanding of the genesis of reservoirs, we can better evaluate the potential and risks of exploration targets, avoid blind exploration, and reduce exploration costs and risks.

[0051] The deep low-permeability sandstone reservoir processing method proposed in this embodiment can perform basic geological analysis on deep low-permeability sandstone reservoirs to generate macroscopic geological information; perform fine characterization of rock fabric and pore structure on rock samples of sedimentary microfacies in deep low-permeability sandstone reservoirs to obtain structural characterization information; and perform diagenetic and pore-forming evolution laws and dynamic mechanism analysis on rock samples to obtain rock analysis information; determine the diagenetic transformation mechanism of high-quality sedimentary microfacies in deep low-permeability sandstone reservoirs based on structural characterization information and rock analysis information; and establish a differential quality reservoir genesis model for deep low-permeability sandstone reservoirs based on macroscopic geological information and diagenetic transformation mechanism. The differential quality reservoir genesis model established in this embodiment can provide a theoretical basis and guidance for finding high-quality reservoirs, and help improve the success rate and benefits of oil and gas exploration and development.

[0052] This embodiment proposes another method for treating a deep low-permeability sandstone reservoir. The technical route of the method can be as follows: Figure 2 shown.

[0053] like Figure 2 As shown, this embodiment can first accumulate the project in the early stage, determine the seismic data, well logging data, logging data, core data, experimental data, thermal burial history, sedimentary mode, porosity and permeability characteristics and mineral components of the deep low-permeability sandstone reservoir, conduct capacity testing for the deep low-permeability sandstone reservoir, and then determine the macroscopic geological laws. This embodiment can also supplement typical sedimentary microfacies samples, perform fine characterization of rock fabric and pore structure, and perform research on the evolution law and dynamic mechanism of diagenesis and pore formation.

[0054] Among them, in the present embodiment, in the fine characterization of rock fabric and pore structure, core description, optical microscope observation, electron microscope splicing, energy spectrum identification and cathode luminescence can be performed respectively to determine the sedimentary structure, sedimentary minerals, diagenetic minerals, primary pores and secondary pores, and then determine the composition, structure and structure of the sedimentary microfacies, and then determine the sedimentary factors of the sedimentary microfacies. In the present embodiment, in the study of diagenetic pore evolution law and dynamic mechanism, photoelectric co-electrochemical analysis, Raman identification, inclusions, element analysis and isotope analysis can be performed respectively to determine the diagenetic type, diagenetic sequence, fluid source, ion exchange and paleotemperature and pressure, determine the fluid, temperature and pressure information, and then determine the diagenetic factors of the sedimentary microfacies. In the present embodiment, according to the sedimentary factors and diagenetic factors of the sedimentary microfacies, the diagenetic transformation mechanism of high-quality sedimentary microfacies can be determined, and then according to the diagenetic transformation mechanism of high-quality sedimentary microfacies and macroscopic geological laws, the differential quality reservoir genesis model is established.

[0055] It should be noted that the inventors of the present invention proposed a micro-region characterization method for the mineral composition and pore structure of low-permeability sandstone reservoirs through a microscopic research approach combining static characterization and dynamic analysis, deepened the research on the diagenesis and pore formation evolution laws and dynamic mechanisms of low-permeability sandstone reservoirs, and revealed the control factors and action mechanisms of effective reservoir development, which has important theoretical guidance significance and practical production value for deepening deep-layer oil and gas exploration and development. This embodiment can be applied to oil and gas exploration of low-permeability sandstone reservoirs in offshore basins, and also has important promotion and reference significance for oil and gas exploration of clastic rock reservoirs.

[0056] Most deep reservoirs have undergone complex evolutionary processes and strong diagenetic transformation. The sedimentary environment cannot fully explain the causes of the heterogeneity of the current reservoirs, indicating that the well deployment idea with high-quality sedimentary facies as favorable prediction targets is not applicable in deep exploration, and cannot meet the needs of the geological complexity and particularity of deep clastic reservoirs, and there is a great prediction risk. However, in the context of deep burial depth and complex evolution, the difference characteristics and transformation mechanism of high-quality sedimentary microfacies with high porosity and permeability after diagenetic evolution are not studied in depth, which restricts the further exploration and development of deep reservoirs.

[0057] Deep resources have great potential, and 63.3% of the proven and controlled recoverable reserves are distributed in clastic rocks, which are important exploration and development targets. However, most deep reservoirs have undergone complex evolutionary processes and strong diagenetic transformation. It is difficult to find relatively high-quality reservoirs under the background of deep burial, strong heterogeneity, and low porosity and permeability.

[0058] The inventors have studied the control factors of the physical properties of deep clastic reservoirs and found that sedimentation controls the original physical properties of the reservoirs, while diagenetic transformation increases the complexity of the reservoirs. The formation of high-quality reservoirs is controlled by temperature, pressure, and fluid factors under background conditions such as tectonic movement, sedimentary environment, and burial method, including the composition, structure, and structure of the original sediments, and the compaction, cementation, and dissolution associated with abnormally high pressure, hydrocarbon injection, thermal cycle convection, and gypsum-salt effect during the evolution process.

[0059] The inventors found through preliminary work that sedimentary factors cannot fully explain the causes of today's reservoir heterogeneity: adjacent wells, the same sedimentary microfacies physical properties, and production capacity are different, and there are often gas-dry interlayers and large vertical changes inside the sand body. This phenomenon shows that the deep clastic rocks have undergone strong transformation during the diagenesis period, and the reservoir heterogeneity has been further enhanced, indicating that the well deployment idea with high-quality sedimentary facies belts as favorable prediction targets is not applicable in deep exploration, and cannot meet the needs of the geological complexity and particularity of deep clastic reservoirs, and there is a great prediction risk.

[0060] Therefore, in order to clarify the diagenetic transformation mechanism of high-quality sedimentary microfacies in deep low-permeability sandstone, determine the effective reservoir types and characteristics after the high-quality sedimentary microfacies are diagenetically transformed, improve the success rate of exploration well prediction, and reduce exploration risks and costs, it is essential to carry out micro-area and in-situ research combining static characterization and dynamic analysis of reservoirs.

[0061] The inventors of the present invention take deep clastic reservoirs as the research object, adopt multidisciplinary comprehensive means such as petrology, petrography, optics, electricity, and chemistry, and through an overall technical route that combines geological analysis with experimental analysis, static characterization with dynamic analysis, and microscopic mechanism with macroscopic background, innovate the micro-region characterization method of mineral structure and pore structure of low-permeability sandstone reservoirs, deepen the research on the diagenesis and pore formation evolution laws and dynamic mechanisms of low-permeability sandstone reservoirs, reveal the controlling factors and action mechanisms of effective reservoir development, clarify the scientific issue of the diagenetic transformation mechanism of high-quality sedimentary microfacies, and finally establish a genetic model of differential quality reservoirs to guide further exploration and development in the study area.

[0062] Specifically, this embodiment can ensure the strategic security of national energy. At present, the external dependence of oil and natural gas is relatively high, and the security of oil and gas resources is one of the important security issues currently faced. The country's deep clastic reservoirs are widely distributed and of many types, with huge resource potential, and large-scale development has been achieved in many places. However, compared with the level of exploration and development in North America, there is still a certain gap. Therefore, achieving a comprehensive breakthrough in deep reservoirs is the only way to achieve sustained energy growth, which will have a significant impact on optimizing the proportion of energy consumption, accelerating the transformation of green energy, and ensuring strategic energy security.

[0063] Specifically, this embodiment can promote the practical application of research results. Research on deep clastic reservoirs is a global research hotspot. Taking offshore deep reservoirs as the research object, a static characterization method suitable for clastic reservoirs in a deep background is proposed to deepen the research on the diagenesis, pore formation evolution laws and dynamic mechanisms of deep clastic reservoirs, reveal the control factors and action mechanisms of effective reservoir development, and reduce exploration risks. It also has important practical application value for oil and gas exploration in deep clastic reservoirs in offshore exploration blocks.

[0064] Specifically, this embodiment can achieve the increase of oil and gas reserves and production in enterprises. This embodiment can further enhance the plan according to the enterprise action plan. At present, the domestic proven geological reserves of petroleum are required to increase significantly, and the realization of this plan urgently requires the rapid growth of offshore proven oil and gas reserves. Therefore, through the static micro-area characterization and dynamic reservoir formation analysis of offshore deep reservoirs, the main controlling factors for the formation of high-quality reservoirs are clarified, the distribution of high-quality reservoirs is predicted, and guidance is provided for the optimization of exploration targets. A breakthrough in deep reservoir exploration is achieved, and the level of reserve utilization is improved, which is of great significance to the increase of reserves and production of enterprises.

[0065] Specifically, this embodiment can improve the enterprise's exploration technology system. The inventor of the present invention reviewed the history of oil and gas exploration and development. The preferred favorable targets have shifted from structural closures to lithological closures, and from conventional high-porosity and permeability reservoirs to unconventional tight reservoirs, which is also accompanied by the innovation and expansion of research technology methods. The idea of ​​well site deployment with high-quality sedimentary facies belts as favorable prediction targets is not applicable in deep exploration, and there is a huge prediction risk. Therefore, in order to clarify the diagenetic transformation mechanism of high-quality sedimentary microfacies of deep low-permeability sandstone, implement the effective reservoir types and characteristics after the high-quality sedimentary microfacies are diagenetically transformed, improve the success rate of exploration well prediction, and reduce exploration risks and costs, it is indispensable to carry out micro-area and in-situ research combining static characterization and dynamic analysis of reservoirs. This is an application embodiment of multidisciplinary cross-integration, an important supplement to macroscopic geological exploration methods such as seismic and well logging, and an enrichment and improvement of the exploration technology system of complex oil and gas reservoir types.

[0066] like Figure 3 As shown, this embodiment provides a deep low-permeability sandstone reservoir processing device, which may include: The geological analysis unit 301 is used to perform basic geological analysis on the deep low-permeability sandstone reservoir to generate macroscopic geological information; The characterization processing unit 302 is used to perform fine characterization processing of rock fabric and pore structure on the rock sample of the sedimentary microfacies in the deep low-permeability sandstone reservoir to obtain structural characterization information; The mechanism analysis unit 303 is used to analyze the diagenesis, pore formation evolution law and dynamic mechanism of the rock sample to obtain rock analysis information; A mechanism determination unit 304 is used to determine the diagenetic transformation mechanism of the high-quality sedimentary microfacies in the deep low-permeability sandstone reservoir according to the structural characterization information and the rock analysis information; The model establishing unit 305 is used to establish a differential quality reservoir genesis model of the deep low permeability sandstone reservoir based on the macro geological information and the diagenetic transformation mechanism.

[0067] It should be noted that the processing of the geological analysis unit 301, the characterization processing unit 302, the mechanism analysis unit 303, the mechanism determination unit 304 and the model establishment unit 305 and the beneficial effects thereof can be respectively referred to in Figure 1 Steps S101 to S105 in the above are not described in detail.

[0068] Optionally, the geological analysis unit 301 is further used for: Analyzing the structural evolution history and thermal burial history of the deep low-permeability sandstone reservoir to determine geological background information, wherein the geological background information includes reservoir diagenesis, pore formation and reservoir formation paleogeological background information; Conducting sedimentary environment analysis and core characterization on the deep low-permeability sandstone reservoir to determine the sedimentary microfacies type in the deep low-permeability sandstone reservoir; Conducting X-ray diffraction quantitative analysis on the deep low-permeability sandstone reservoir to identify the whole-rock mineral composition information; Conducting porosity and permeability tests on the deep low-permeability sandstone reservoir to determine the physical property characteristics of the main sedimentary microphases in the deep low-permeability sandstone reservoir; Determine basic information on production capacity by combining well logging, mud logging and drill pipe formation testing for the deep low-permeability sandstone reservoir; The geological background information, the sedimentary microfacies type, the whole rock mineral component information, the main sedimentary microfacies physical property characteristics and the basic production capacity information are determined as the macroscopic geological information.

[0069] Optionally, the characterization processing unit 302 is further configured to: Performing multi-scale heterogeneity characterization on the rock sample to obtain corresponding characterization information, wherein the characterization information includes objective structural, texture and composition characteristics of typical sedimentary microfacies in the deep low-permeability sandstone reservoir; Performing mineral genesis type and fabric characteristics analysis based on the rock sample to determine corresponding mineral analysis information, wherein the mineral analysis information includes mineral type, element characteristics, primary and secondary genesis and differential fabric characteristics of the same mineral; Classifying and quantitatively characterizing mineral pores according to the rock sample to obtain mineral classification information and quantitative information; The characterization information, the mineral analysis information, the mineral classification information and the quantification information are determined as the structural characterization information.

[0070] Optionally, the mechanism analysis unit 303 is further configured to: Conducting fluid inclusion analysis, optical microscopy and electron microscopy observations on the rock samples to determine corresponding analytical observation information, wherein the analytical observation information includes diagenetic difference characteristics, diagenetic types, sequences and paleo-temperature and pressure conditions of the sedimentary microfacies; Based on the rock samples, the water-rock reaction mechanism of fluid and rock mineral is analyzed to obtain chemical information associated with diagenetic characteristics and pore morphology, and determine the causal mechanism of the main diagenetic events; Based on the rock samples, the diagenetic phase types and pore difference evolution characteristics are analyzed to determine the pore difference evolution characteristics between diagenetic phases; The analytical observation information, the chemical information, the causal mechanism of the main diagenetic events and the differential evolution characteristics of the pores between the diagenetic phases are determined as the rock analysis information.

[0071] Optionally, the mechanism determination unit 304 is further configured to: Determining the sedimentary factors of the sedimentary microfacies according to the structural characterization information, and determining the diagenetic factors of the sedimentary microfacies according to the rock analysis information; Based on the sedimentary factors, the control effect analysis of the development of high-quality sedimentary microfacies is carried out to obtain effect analysis information; and based on the diagenetic factors, the transformation mechanism analysis of high-quality sedimentary microfacies is carried out to obtain transformation mechanism information; The diagenetic transformation mechanism is determined according to the action analysis information and the transformation mechanism information.

[0072] Optionally, the mechanism determination unit 304 is further configured to: Based on the above sedimentary factors, the physical property differences between similar diagenetic backgrounds and different sedimentary microfacies are compared to clarify the high-quality sedimentary microfacies types under the control of structure, texture and composition, and serve as the above-mentioned action analysis information; Optionally, the mechanism determination unit 304 is further configured to: Based on the diagenetic factors, the physical property differences of different diagenetic phases of high-quality sedimentary microfacies are compared, and the diagenetic transformation mechanism of temperature, pressure and fluid on high-quality sedimentary microfacies is clarified, and used as the transformation mechanism information.

[0073] Optionally, the mode establishing unit 305 is further configured to: In combination with the macroscopic geological information and the diagenetic transformation mechanism, the effectiveness of different diagenetic phase reservoirs within the sedimentary microfacies in the deep low-permeability sandstone reservoir is determined and used as the genetic model of the differential quality reservoirs; wherein the effectiveness includes high quality, effective and / or dense.

[0074] The deep low-permeability sandstone reservoir processing device proposed in this embodiment can perform basic geological analysis on deep low-permeability sandstone reservoirs to generate macroscopic geological information; perform fine characterization processing on rock fabric and pore structure of rock samples of sedimentary microfacies in deep low-permeability sandstone reservoirs to obtain structural characterization information; and perform diagenetic and pore-forming evolution laws and dynamic mechanism analysis on rock samples to obtain rock analysis information; determine the diagenetic transformation mechanism of high-quality sedimentary microfacies in deep low-permeability sandstone reservoirs based on structural characterization information and rock analysis information; and establish a differential quality reservoir genesis model for deep low-permeability sandstone reservoirs based on macroscopic geological information and diagenetic transformation mechanism. The differential quality reservoir genesis model established in this embodiment can provide a theoretical basis and guidance for finding high-quality reservoirs, and help improve the success rate and benefits of oil and gas exploration and development.

[0075] The deep low-permeability sandstone reservoir processing device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0076] The embodiment of the present invention also provides a computer device having the above Figure 3 The deep low-permeability sandstone reservoir treatment device shown.

[0077] See also Figure 4 , a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses for communication, and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 4 A processor 10 is taken as an example.

[0078] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0079] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0080] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function. The data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage devices. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0081] The memory 20 may include a volatile memory, such as a random access memory. The memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive. The memory 20 may also include a combination of the above-mentioned types of memory.

[0082] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0083] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0084] 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for treating a deep low-permeability sandstone reservoir, characterized in that: include: Conduct basic geological analysis of deep low-permeability sandstone reservoirs to generate macroscopic geological information; Performing fine characterization of rock fabric and pore structure on rock samples of sedimentary microfacies in the deep low-permeability sandstone reservoir to obtain structural characterization information; and analyzing the diagenesis, pore formation evolution law and dynamic mechanism of the rock samples to obtain rock analysis information; Determining the diagenetic transformation mechanism of the high-quality sedimentary microfacies in the deep low-permeability sandstone reservoir based on the structural characterization information and the rock analysis information; Based on the macroscopic geological information and the diagenetic transformation mechanism, a differential quality reservoir genesis model of the deep low-permeability sandstone reservoir is established.

2. The method according to claim 1, characterized in that: The basic geological analysis of the deep low-permeability sandstone reservoir is performed to generate macroscopic geological information, including: Analyzing the structural evolution history and thermal burial history of the deep low-permeability sandstone reservoir to determine geological background information, wherein the geological background information includes reservoir diagenesis, pore formation and reservoir formation paleogeological background information; Conducting sedimentary environment analysis and core characterization on the deep low-permeability sandstone reservoir to determine the sedimentary microfacies type in the deep low-permeability sandstone reservoir; Conducting X-ray diffraction quantitative analysis on the deep low-permeability sandstone reservoir to identify the whole-rock mineral composition information; Conducting porosity and permeability tests on the deep low-permeability sandstone reservoir to determine the physical property characteristics of the main sedimentary microphases in the deep low-permeability sandstone reservoir; Determine basic information on production capacity by combining well logging, mud logging and drill pipe formation testing for the deep low-permeability sandstone reservoir; The geological background information, the sedimentary microfacies type, the whole rock mineral component information, the main sedimentary microfacies physical property characteristics and the basic production capacity information are determined as the macroscopic geological information.

3. The method according to claim 1, characterized in that The rock samples of the sedimentary microfacies in the deep low-permeability sandstone reservoir are subjected to fine characterization of rock fabric and pore structure to obtain structural characterization information, including: Performing multi-scale heterogeneity characterization on the rock sample to obtain corresponding characterization information, wherein the characterization information includes objective structural, texture and composition characteristics of typical sedimentary microfacies in the deep low-permeability sandstone reservoir; Performing mineral genesis type and fabric characteristics analysis based on the rock sample to determine corresponding mineral analysis information, wherein the mineral analysis information includes mineral type, element characteristics, primary and secondary genesis and differential fabric characteristics of the same mineral; Classifying and quantitatively characterizing mineral pores according to the rock sample to obtain mineral classification information and quantitative information; The characterization information, the mineral analysis information, the mineral classification information and the quantification information are determined as the structural characterization information.

4. The method according to claim 1, characterized in that: The rock samples are subjected to diagenesis, pore formation evolution law and dynamic mechanism analysis to obtain rock analysis information, including: Conducting fluid inclusion analysis, optical microscopy and electron microscopy observations on the rock samples to determine corresponding analytical observation information, wherein the analytical observation information includes diagenetic difference characteristics, diagenetic types, sequences and paleo-temperature and pressure conditions of the sedimentary microfacies; Based on the rock samples, the water-rock reaction mechanism of fluid and rock mineral is analyzed to obtain chemical information associated with diagenetic characteristics and pore morphology, and determine the causal mechanism of the main diagenetic events; Based on the rock samples, the diagenetic phase types and pore difference evolution characteristics are analyzed to determine the pore difference evolution characteristics between diagenetic phases; The analytical observation information, the chemical information, the causal mechanism of the main diagenetic events and the differential evolution characteristics of the pores between the diagenetic phases are determined as the rock analysis information.

5. The method according to claim 1, characterized in that Determining the diagenetic transformation mechanism of the high-quality sedimentary microfacies in the deep low-permeability sandstone reservoir based on the structural characterization information and the rock analysis information includes: Determining the sedimentary factors of the sedimentary microfacies according to the structural characterization information, and determining the diagenetic factors of the sedimentary microfacies according to the rock analysis information; Based on the sedimentary factors, the control effect analysis of the development of high-quality sedimentary microfacies is carried out to obtain effect analysis information; and based on the diagenetic factors, the transformation mechanism analysis of high-quality sedimentary microfacies is carried out to obtain transformation mechanism information; The diagenetic transformation mechanism is determined according to the action analysis information and the transformation mechanism information.

6. The method according to claim 5, characterized in that The high-quality sedimentary microfacies development control analysis based on the sedimentary factors to obtain the effect analysis information includes: Based on the above sedimentary factors, the physical property differences between similar diagenetic backgrounds and different sedimentary microfacies are compared to clarify the high-quality sedimentary microfacies types under the control of structure, texture and composition, and serve as the above-mentioned action analysis information; The high-quality sedimentary microfacies transformation mechanism analysis based on the diagenetic factors to obtain transformation mechanism information includes: Based on the diagenetic factors, the physical property differences of different diagenetic phases of high-quality sedimentary microfacies are compared, and the diagenetic transformation mechanism of temperature, pressure and fluid on high-quality sedimentary microfacies is clarified, and used as the transformation mechanism information.

7. The method according to claim 1, characterized in that The method of establishing a differential quality reservoir genesis model of the deep low-permeability sandstone reservoir based on the macroscopic geological information and the diagenetic transformation mechanism includes: In combination with the macroscopic geological information and the diagenetic transformation mechanism, the effectiveness of different diagenetic phase reservoirs within the sedimentary microfacies in the deep low-permeability sandstone reservoir is determined and used as the genetic model of the differential quality reservoirs; wherein the effectiveness includes high quality, effective and / or dense.

8. A deep low-permeability sandstone reservoir treatment device, characterized in that: include: Geological analysis unit, used to conduct basic geological analysis of deep low-permeability sandstone reservoirs to generate macroscopic geological information; A characterization processing unit is used to perform fine characterization processing of rock fabric and pore structure on rock samples of sedimentary microfacies in the deep low-permeability sandstone reservoir to obtain structural characterization information; A mechanism analysis unit, used to analyze the diagenesis, pore formation evolution law and dynamic mechanism of the rock sample to obtain rock analysis information; a mechanism determination unit, for determining the diagenetic transformation mechanism of the high-quality sedimentary microfacies in the deep low-permeability sandstone reservoir according to the structural characterization information and the rock analysis information; A model building unit is used to build a differential quality reservoir genesis model of the deep low permeability sandstone reservoir based on the macro geological information and the diagenetic transformation mechanism.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the deep low-permeability sandstone reservoir processing method according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the deep low-permeability sandstone reservoir processing method according to any one of claims 1 to 7.

Images