Carbonate rock and gypsum salt rock combination zone analysis method and device

Abstract

The invention discloses a carbonate rock and gypsum salt rock combination zone analysis method and device, and the method comprises the steps: dividing a plurality of analysis units according to the similarity of a geological structure unit, a sedimentary facies belt and an oil-gas accumulation combination type in a research zone; the oil-gas reservoir-forming combination in each analysis unit has similar geological structures, sedimentary environments and reservoir-forming characteristics; predicting a space-time factor of hydrocarbon generation capacity in the research zone and a space-time factor of a sub-heterotypic structure zone; comprehensively analyzing and researching space-time factors of the in-zone Tibetan formation area by combining a structure evolution history, a deposition history, a thermal evolution history and a fluid evolution history; and selecting an exploration area according to space-time factors in the research area. According to the method, a region with favorable reservoir forming conditions can be selected as an exploration region, and a new thought and direction are provided for oil-gas exploration.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum geological exploration, and in particular to a zone analysis method and device for a combination of carbonate rock and gypsum salt rock. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. No statement herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] In the field of oil and gas exploration, carbonate-gypsum salt rock combinations have attracted considerable attention due to their unique geological characteristics and oil and gas accumulation conditions. Carbonate rocks possess complex pore structures and widely varying permeability, which provide excellent reservoir conditions for storing oil and gas. However, the formation of pores is influenced by a combination of factors, including the sedimentary environment and diagenesis. Gypsum salt, due to its dense structure and low permeability, is an ideal caprock, effectively preventing the upward escape of oil and gas and allowing it to accumulate within carbonate reservoirs. The fine characteristics of gypsum salt rock, including its mineral composition, bedding structure, and possible microfractures, significantly influence its sealing and stability.

[0004] However, traditional zone analysis methods often fail to fully utilize diverse geological information, making it difficult to analyze the enrichment of oil and gas reservoirs under the combined effects of reservoir and caprock. Therefore, there is an urgent need for innovative analytical methods that can comprehensively and accurately analyze the geological characteristics and oil and gas accumulation patterns of carbonate and gypsum-salt rock zones, overcome the shortcomings of traditional methods, and provide more powerful technical support for oil and gas exploration and development. Summary of the Invention

[0005] The present invention provides a method for analyzing carbonate and gypsum-salt rock zones, which is used to select areas with favorable reservoir formation conditions as exploration areas, providing new ideas and directions for oil and gas exploration. The method includes:

[0006] The study area was divided into multiple analysis units based on the similarity of geological structural units, sedimentary facies belts, and oil and gas accumulation assemblages within the study area. The oil and gas accumulation assemblages include rock assemblages with gypsum-salt rocks as caprocks and carbonate rocks as reservoirs. The similarity of the geological structure, sedimentary environment, and accumulation characteristics of the oil and gas accumulation assemblages within each analysis unit exceeded the corresponding threshold.

[0007] By analyzing the gas reservoir and gas source of each analysis unit, the distribution of source rocks and the period of oil and gas generation in the study area are predicted;

[0008] Based on the fault system of each analysis unit, the distribution of differentiated structural belts in the study area is predicted;

[0009] Based on the tectonic evolution history, sedimentary history, thermal evolution history and fluid evolution history of the differentiated tectonic belt, the geological processes and evolutionary events in the process of oil and gas accumulation are identified; based on the geological processes and evolutionary events in the process of oil and gas accumulation, the distribution of accumulation areas in the study area and the formation period of the accumulation areas are predicted;

[0010] Exploration areas are selected based on the temporal and spatial factors within the study area. Temporal factors include the period of oil and gas generation in source rocks and the period of formation of reservoirs, while spatial characteristics include the distribution of source rocks and the distribution of reservoirs.

[0011] The present invention also provides a zone analysis device for a combination of carbonate rock and gypsum salt rock, which is used to select areas with favorable reservoir formation conditions as exploration areas, providing new ideas and directions for oil and gas exploration. The device includes:

[0012] The analysis unit division module is used to divide the study area into multiple analysis units based on the similarity of geological structural units, sedimentary facies belts, and oil and gas accumulation combinations within the study area. Oil and gas accumulation combinations include rock combinations with gypsum salt rocks as cap rocks and carbonate rocks as reservoirs. The similarity between the geological structure, sedimentary environment, and accumulation characteristics of the oil and gas accumulation combinations within each analysis unit exceeds the corresponding threshold.

[0013] The source rock analysis module is used to: predict the distribution of source rocks and the period of oil and gas generation in the study area by performing gas reservoir dissection and gas source analysis on each analysis unit;

[0014] The module for analyzing differentiated structural belts is used to predict the distribution of differentiated structural belts in the study area based on the fault system of each analysis unit.

[0015] The reservoir analysis module is used to: identify the geological processes and evolutionary events in the process of oil and gas accumulation based on the tectonic evolution history, sedimentary history, thermal evolution history, and fluid evolution history of the differentiated tectonic belt; and predict the distribution of reservoirs within the study area and the formation period of the reservoirs based on the geological processes and evolutionary events in the process of oil and gas accumulation;

[0016] The exploration area selection module is used to select exploration areas based on the time and space factors within the study area. The time factors include the period of oil and gas generation in the source rocks and the period of formation of the reservoirs. The spatial characteristics include the distribution of source rocks and the distribution of the reservoirs.

[0017] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned carbonate rock and gypsum salt rock combination zone analysis method is implemented.

[0018] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method for zone analysis of the combination of carbonate rock and gypsum salt rock is implemented.

[0019] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the above-mentioned zone analysis method for the combination of carbonate rock and gypsum salt rock.

[0020] Compared with the technical solutions in the prior art that do not fully utilize multiple geological information and have difficulty in analyzing the enrichment of oil and gas reservoirs under the combined action of reservoirs and caprocks, the embodiments of the present invention divide the oil and gas accumulation combination into different analysis units based on geological structural factors, sedimentary facies factors, and the combined characteristics of oil and gas accumulation. This makes the geological characteristics and accumulation conditions within the analysis units more similar and consistent, providing a reasonable basis for subsequent analysis; gas reservoir dissection and gas source analysis are carried out on the analysis units to provide rich information for the establishment of oil and gas accumulation models; the relationship between caprocks and oil and gas migration is reflected by predicting differentiated structural zones; through the analysis of "four histories" (tectonic evolution history, sedimentary history, thermal evolution history, and fluid evolution history), the various geological processes and evolutionary events in the oil and gas accumulation process are understood, and the distribution and formation period of the accumulation area are predicted; finally, a comprehensive analysis is performed on the distribution of source rocks, hydrocarbon generation capacity, and the spatiotemporal factors of oil and gas migration. Areas with favorable accumulation conditions can be selected as exploration areas, thereby improving exploration efficiency and success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 This is a flow chart of a method for zone analysis of a combination of carbonate rock and gypsum salt rock in an embodiment of the present invention;

[0023] Figure 2 This is a graph showing the relationship between methane content and ethane content in natural gas according to an embodiment of the present invention;

[0024] Figure 3 Graph showing the relationship between methane content and dryness coefficient in natural gas according to an embodiment of the present invention;

[0025] Figure 4 is a sedimentary evolution diagram of a group of connected wells in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the "Four Histories" analysis results of the research zone in the embodiment of the present invention;

[0027] Figure 6 Schematic diagram of a zone analysis device for a combination of carbonate rock and gypsum salt rock according to an embodiment of the present invention;

[0028] Figure 7 This is another schematic diagram of the zone analysis device for a combination of carbonate rock and gypsum salt rock in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0030] In the field of oil and gas exploration, accurately identifying favorable oil and gas enrichment zones is key to improving exploration efficiency and success rates. Traditional methods have limitations when analyzing carbonate-gypsum rock combinations, making it difficult to comprehensively and accurately assess their complex geological characteristics and oil and gas accumulation conditions.

[0031] Figure 1 The flowchart of the method for zone analysis of carbonate rock and gypsum salt rock combination in the embodiment of the present invention is as follows. In order to overcome the shortcomings of the traditional method, the embodiment of the present invention proposes a method for zone analysis of carbonate rock and gypsum salt rock combination, such as Figure 1 As shown, the method includes the following steps:

[0032] Step 101: Divide the study area into multiple analysis units based on the similarity of geological structural units, sedimentary facies belts, and oil and gas accumulation combination types within the study area; the oil and gas accumulation combination includes a rock combination with gypsum salt rock as the cap rock and carbonate rock as the reservoir; the similarity between the geological structure, sedimentary environment, and accumulation characteristics of the oil and gas accumulation combination in each analysis unit exceeds a corresponding threshold;

[0033] Step 102: Predict the distribution of source rocks and the period of oil and gas generation in the study area by performing gas reservoir dissection and gas source analysis on each analysis unit;

[0034] Step 103: predict the distribution of differentiated structural zones within the study area based on the fault systems of each analysis unit;

[0035] Step 104: Identify the geological processes and evolutionary events in the oil and gas accumulation process based on the tectonic evolution history, sedimentary history, thermal evolution history, and fluid evolution history of the differentiated tectonic belt; and predict the distribution of the accumulation areas and the formation period of the accumulation areas within the study area based on the geological processes and evolutionary events in the oil and gas accumulation process.

[0036] Step 105: Select an exploration area based on the time and space factors within the study area. The time factors include: the period of oil and gas generation in the source rocks and the period of formation of the reservoirs. The space characteristics include: the distribution of source rocks and the distribution of the reservoirs.

[0037] Compared with the technical solutions in the prior art that do not fully utilize multiple geological information and have difficulty in analyzing the enrichment of oil and gas reservoirs under the combined action of reservoirs and caprocks, the embodiments of the present invention divide the oil and gas accumulation combination into different analysis units based on geological structural factors, sedimentary facies factors, and the combined characteristics of oil and gas accumulation. This makes the geological characteristics and accumulation conditions within the analysis units more similar and consistent, providing a reasonable basis for subsequent analysis; gas reservoir dissection and gas source analysis are carried out on the analysis units to provide rich information for the establishment of oil and gas accumulation models; the relationship between caprocks and oil and gas migration is reflected by predicting differentiated structural zones; through the analysis of "four histories" (tectonic evolution history, sedimentary history, thermal evolution history, and fluid evolution history), the various geological processes and evolutionary events in the oil and gas accumulation process are understood, and the distribution and formation period of the accumulation area are predicted; finally, a comprehensive analysis is performed on the distribution of source rocks, hydrocarbon generation capacity, and the spatiotemporal factors of oil and gas migration. Areas with favorable accumulation conditions can be selected as exploration areas, thereby improving exploration efficiency and success rate.

[0038] When faced with oil and gas accumulation zones, traditional analysis methods usually do not take into account the different characteristics of reservoirs and caprocks, nor do they make full use of a variety of geological information. Take the carbonate-gypsum salt rock combination zone as an example: on the one hand, the traditional method does not take into account the complex pore structure of the carbonate reservoir and the fine characteristics of the gypsum salt rock caprock in the analysis; on the other hand, the traditional method does not fully integrate a variety of geological data to accurately identify and predict favorable zones for oil and gas accumulation. The embodiment of the present invention divides the analysis units within the study zone according to the geological structural factors, sedimentary phase factors, and the combined characteristics of oil and gas accumulation, so that the internal geological characteristics and accumulation conditions of the research object have higher similarity and consistency, providing a reasonable basis for subsequent analysis.

[0039] In the embodiment of the present invention, a plurality of analysis units are divided within the study area based on the similarity of the geological structural units, sedimentary facies belts, and oil and gas accumulation combination types within the study area; the oil and gas accumulation combination within each analysis unit has similar geological structure, sedimentary environment, and accumulation characteristics.

[0040] In one embodiment, the thickness of gypsum salt rock, the relationship between gypsum salt rock and carbonate rock, and the distribution of gypsum salt rock are analyzed to determine the type of oil and gas reservoir combination; the oil and gas reservoir combination types include: compact oil and gas reservoir combination and remote oil and gas reservoir combination.

[0041] For example, seismic profiles, drilling revelations, and analysis of typical structural reservoir formations indicate that the Cambrian reservoirs (the main oil and gas-bearing strata) in the study area are primarily composed of the Longwangmiao to Xixiangchi Formations, capped by gypsum-salt rocks, Ordovician limestone, and mixed sedimentary rocks. During the Early and Middle Cambrian Longwangmiao-Gaotai Formation depositional period, the central portion of the study area was located in the evaporative lagoonal facies region above the paleohigh. Gypsum-salt rock deposits were absent or only thin layers were observed within the Longwangmiao-Gaotai Formation sedimentary assemblage. Grain-beach facies deposits of the Longwangmiao Formation and mixed sedimentary facies deposits of the Gaotai Formation intercalated with contemporaneous gypsum-salt layers in a finger-like pattern. However, the southeastern portion of the study area, located within a large evaporative lagoonal facies region, contains thick and high-purity gypsum-salt rocks, with only thin layers of grain-beach facies or dolomite. During the deposition period of the Xixiangchi Formation in the Middle and Upper Cambrian, the climate was humid, the evaporative lagoon gradually disappeared, and only thin layers of gypsum salt layers were visible in some local areas, while large sets of thick dolomite deposits developed.

[0042] In summary, the reservoirs within the Longwangmiao Formation and the gypsum-salt layers are coeval sedimentary layers and can be classified as intersalt layers, serving as analytical units for the Cambrian intersalt reservoir-forming system. The reservoirs within the Xixiangchi Formation, located above the gypsum-salt layers, can be classified as suprasalt layers, serving as analytical units for the Cambrian suprasalt reservoir-forming system. Influenced by differences in reservoir-caprock configuration and hydrocarbon supply conditions across regions, the Longwangmiao Formation develops mixed-source, lateral-reservoir, fault-dissolution-type and lower-source, upper-reservoir, near-source, dissolved-pore-type reservoir-forming assemblages, while the Xixiangchi Formation develops mixed-source, lateral-reservoir, fault-dissolution-type and lower-source, upper-reservoir, distant-source, dissolved-pore-type reservoir-forming assemblages.

[0043] Among them, in the mixed-source, lateral-reservoir, fault-dissolution type reservoir-forming combination, the contact relationship between the gypsum-salt rock cap rock and the carbonate rock reservoir is weak, the oil and gas source and the reservoir are far apart, and the migration and accumulation of oil and gas are mainly through faults or caves, which belongs to the remote oil and gas reservoir-forming combination; in the lower-source, upper-reservoir, near-source, dissolution-pore type reservoir-forming combination, the gypsum-salt rock cap rock and the carbonate rock reservoir are closely adjacent, the oil and gas source and the reservoir are relatively close, and the migration and accumulation of oil and gas are usually carried out through dissolution pores, which belongs to the compact oil and gas reservoir-forming combination; in the mixed-source, lateral-reservoir, fault-dissolution type reservoir-forming combination, there is a certain distance between the gypsum-salt rock cap rock and the carbonate rock reservoir, the oil and gas source and the reservoir are far apart, and the migration and accumulation of oil and gas are mainly carried out through dissolution pores, which belongs to the remote oil and gas reservoir-forming combination.

[0044] In the embodiment of the present invention, the distribution of source rocks and the period of oil and gas generation in the source rocks in the study area are predicted through gas reservoir dissection and gas source analysis of each analysis unit.

[0045] For example, experimental analysis of natural gas composition, carbon and hydrogen isotopes in each analytical unit is carried out, and the experimental analysis results are comprehensively compared with the composition and maturity of the source rock. Among them, natural gas composition (such as methane and ethane content) and dryness coefficient are key indicators. Figure 2This is a graph showing the relationship between methane and ethane content in natural gas, as used in an example of the present invention. Methane content reflects the primary component of natural gas, while the content of heavier hydrocarbons like ethane indicates the maturity and thermal evolution of organic matter. The relationship between methane and ethane content helps identify the source and generation mechanism of natural gas, such as oil-derived or coal-derived gas. Figure 3 This is a graph showing the relationship between methane content and dryness coefficient in natural gas, according to an embodiment of the present invention. The natural gas dryness coefficient (the ratio of methane to total hydrocarbons) indicates the methane enrichment level in natural gas. The relationship between methane content and dryness coefficient can be used to assess the maturity and evolution stage of natural gas. A higher dryness coefficient indicates greater natural gas maturity.

[0046] exist Figure 2 and Figure 3 Among them, Gao-Mo (new well), Gao-Mo (old well), West 1, West 2, Heshen 1, Moshen 1, Guangtan 2 and Nanchong 1 are the names of the wells. Figure 2 and Figure 3 The gas source analysis results shown in the figure show that most of the natural gas discovered in the Sinian-Cambrian is crude oil cracking gas. The gas sources in the central and western parts of the study area are mainly from the black highly overmature sapropelic shale and carbonaceous mudstone of the Qiongzhusi Formation and Maidiping Formation of the Lower Cambrian, followed by the thin layer of black overmature sapropelic shale of the Deng 3 Member of the Dengying Formation of the Upper Sinian System; while the gas sources in the eastern and southern parts of the study area are mainly from the mud shale of the Qiongzhusi Formation of the Lower Cambrian, the black shale of the Deng 3 Member of the Dengying Formation of the Upper Sinian System, and the black mature shale of the Longmaxi Formation of the Silurian System.

[0047] In one embodiment, gas reservoir dissection and gas source analysis are performed on each analysis unit to determine the locations of multiple gas sources in the reservoir development area within the study area, and to analyze the multi-phase oil and gas filling paths and multi-phase oil and gas migration paths of the multiple gas sources; the multi-phase oil and gas filling paths and multi-phase oil and gas migration paths of the multiple gas sources are used to predict the distribution of source rocks in the study area and the oil and gas generation period of the source rocks.

[0048] Carbonate oil and gas exploration practices have confirmed that oil and gas enrichment patterns differ from those in clastic rocks and are not entirely controlled by secondary tectonic zones. Vertically, they are controlled by "oil and gas reservoir assemblages" and horizontally by large-scale differentiated structures within the craton, such as paleorifts, paleouplifts, tectonic hinge zones, paleoplatform margins, paleofault zones, and reservoir lithologic or physical property variation zones. These factors are particularly important in understanding the four primary controlling factors: source kitchens, paleotectonic morphology, reservoir type or lithofacies paleogeographic pattern, and drainage systems. Therefore, interpretation of paleorifts, paleouplifts, paleoplatform margins, and paleofault zones in the research area is crucial.

[0049] In the embodiment of the present invention, the distribution of differentiated structural zones within the study area is predicted based on the fault system of each analysis unit.

[0050] In one embodiment, seismic exploration technology and geological modeling methods are used to obtain the fault structural characteristics of each analysis unit; the fault structural characteristics include: the development and distribution pattern of folds, the development and distribution pattern of faults; the fault structural characteristics are analyzed to obtain the type, scale, and activity period of the fault; based on the relationship between the type of fault and oil and gas migration and oil and gas accumulation, the relationship between the scale of the fault and oil and gas migration and oil and gas accumulation, and the relationship between the activity period of the fault and oil and gas migration and oil and gas accumulation, the distribution of differentiated structural belts in the study area is predicted.

[0051] For example, by combining comprehensive sedimentary facies research with 2D and 3D seismic data, the unified stratigraphic division and comparison of the Sinian-Cambrian well-seismic data, seismic facies analysis, and detailed interpretation of stratigraphic thickness and deep structures in the study area were conducted. A Late Sinian-Early Cambrian intracratonic rift was discovered in the central area of ​​the study area. It extends in a NWW direction from the western part of the study area to the central and southern parts of the study area, with a width of 50-300 km and a length of 320 km from north to south. The area within the study area is 6×104 km2. 2 It not only caused the structural differential settlement of the platforms on both sides of the rift, leading to the difference in paleo-geomorphology, but also controlled the deposition of hill-shoal bodies in the platform margin belt during the Dengying period on both sides of the rift, resulting in the formation of two large sedimentary paleo-uplifts, which constituted the prototype of the paleo-uplift in the middle of the study area.

[0052] During the deposition period of the Qiongzhusi Formation in the early Cambrian, due to the enhanced regional extensional tectonic activity, the rifts within the craton were intensively active and subsided rapidly. The rifts were filled with huge thicknesses of mudstone and shale formed in a deep-water shelf environment. The mudstones and shales with high organic carbon content became the main hydrocarbon source in the central area and surrounding areas of the study area.

[0053] During the deposition of the Canglangpu Formation in the middle and late Early Cambrian, the regional extension of the geological unit in the study area shifted to compression, leading to a major shift in the tectonic pattern during the middle Early Cambrian. The amplitude of vertical differential movement decreased significantly, and the uplift-depression pattern began to disappear. Following the leveling and filling of the Qiongzhusi Stage, the differential tectonic subsidence between the intracratonic rift and its surrounding margins gradually disappeared. The two early sedimentary paleohighs were unified into a single large paleohigh, which exerted a significant control on sedimentation, as evidenced by the increasing thickness of the paleohigh towards the slope. This stage of evolution continued into the Silurian.

[0054] Based on the above analysis, it is believed that the differentiated structures within the Cambrian Craton that control the study area are mainly the rift in the central area of ​​the study area, the paleo-uplift in the middle of the study area, the fault zone trending northeast, and the location of the evaporative lagoon that controlled the development of the reservoir during the same period.

[0055] Lateral variations in lithofacies can reveal the continuity of reservoirs and caprocks, while vertical variations in lithofacies can reflect the evolution of the sedimentary environment and help identify key periods of oil and gas generation, migration, and accumulation. Analyzing the stability and changing trends of lithofacies formation conditions can estimate uncertainties in reservoir continuity, size, and preservation conditions, helping to mitigate exploration risks.

[0056] The sedimentary environment includes tectonic setting, lithofacies characteristics and paleogeographic environment, which can reveal the relationship between sedimentary patterns and oil and gas reservoirs. Specifically, the tectonic setting includes geological structures such as faults and folds, which can serve as channels or traps for oil and gas migration; lithofacies characteristics can determine the distribution of reservoirs and caprocks and their physical properties; and reconstructing the sedimentary environment in combination with the paleogeographic environment can determine the paths of oil and gas generation and migration.

[0057] In one embodiment, geological data, geophysical data, and geochemical data are used to analyze the tectonic background, lithofacies characteristics, and paleogeographic environment of each analysis unit, determine the sedimentary pattern of each analysis unit, and analyze the relationship between the sedimentary pattern and the oil and gas reservoirs; within the sequence framework, favorable lithofacies areas are divided based on the relationship between the sedimentary pattern and the oil and gas reservoirs.

[0058] By coupling chemostratigraphy with cyclostratigraphy, a more accurate, high-resolution sequence framework can be established, providing a framework for reservoir formation and evolution. For example, a Cambrian sequence stratigraphic framework for the study area was established based on core, field outcrop, drilling, seismic interpretation, and well logging data.

[0059] The Cambrian is mainly composed of sedimentary systems such as clastic shelf, mixed shelf, evaporative gentle slope platform, mixed evaporative restricted platform and evaporative restricted platform from bottom to top, with six third-order sequences developed, corresponding to the Maidiping Formation∈1m, Qiongzhusi Formation∈1q, Canglangpu Formation∈1c, Longwangmiao Formation∈2l, Gaotai Formation∈2g and Xixiangchi Formation∈3x (from bottom to top, the third-order sequence stratigraphic layers are numbered SQ1 to SQ6).

[0060] Figure 4 This is a sedimentary evolution diagram of a group of connected wells in an embodiment of the present invention. Figure 4 The GR curve and AC curve of drilling wells Moxi 8, Gaoshi 16, Hetan 1, Zuo 3, Jiaoshi 1, and Xiushan Donggaomiao are shown as they change with depth, as well as the lithologic characteristics at different depths. Figure 4As shown in Figure 3, the Cambrian carbonate-gypsum salt rock paragenesis system includes three regressive third-order sequence cycles (SQ4 to SQ6) that are shallowing upward. Each third-order sequence contains several secondary cycles. For example, the Longwangmiao Formation ∈2l contains 3 to 4 shallowing upward secondary cycles, the Gaotai Formation ∈2g contains 1 to 2 shallowing upward secondary cycles, and the Xixiangchi Formation ∈3x contains 3 to 4 shallowing upward secondary cycles. The gypsum salt rocks are mainly developed in the highstand areas of sequences SQ4 and SQ5 (i.e., Longwangmiao Formation ∈2l and Gaotai Formation ∈2g), and a few are developed in the Xixiangchi Formation ∈3x of sequence SQ6.

[0061] Analysis of the stratum filling, sedimentary facies and lateral distribution of gypsum salt rock within the sequence framework revealed that the top strata of the Cambrian above the paleo-uplift in the central part of the study area and in the surrounding areas are severely missing, with the thickness of the residual strata mostly less than 100 m. The developed sedimentary facies are mainly clastic shelf facies, mixed shelf facies, mixed platform facies and grain bank facies, and gypsum salt rock is not developed. The Cambrian sequence cycle in the eastern and southern parts of the study area is relatively complete, and its bottom strata have bottom-overlap characteristics. The sedimentary facies are mostly mixed shelf facies, evaporative ramp facies, and mixed evaporative restricted platform facies, and the thickness of gypsum salt rock can range from 50 to 700 m.

[0062] The results indicate that the stratigraphic filling of the Cambrian carbonate-gypsum-salt symbiosis within the study area exhibits a "bottom-overlapping, top-cutting" pattern, with thinner areas in the west and thicker areas in the east. Gypsum-salt accumulation is primarily located within the Longwangmiao and Gaotai Formations in the southern and eastern regions. The sedimentary facies development pattern, from bottom to top, includes three major sedimentary structural layers: the evaporative-carbonate ramp, the evaporative-mixed confined platform, and the evaporative-confined platform. Influenced by differences in paleogeographic patterns, paleoprovenances, paleoclimate changes, and sea-level fluctuations, these three sedimentary structural layers exhibit significant differences in sedimentary environment, evaporative tidal flats or evaporative lagoons, and grain bank distribution. Sedimentary environment changes, from bottom to top, progress in the order of open, long-term occlusion, evaporative salinization, and open; grain bank distribution changes in the order of large-scale "double banks," scattered banks, and ribbon-like banks; and the overall scale of evaporative lagoons and evaporative tidal flats has decreased.

[0063] In one embodiment, the spatial factors further include: the distribution of favorable lithofacies areas.

[0064] Within the same study area, different tectonic units exhibit differences in their subsidence history, hydrocarbon generation history, diagenetic history, temperature and pressure field variations, and reservoir formation history. By studying these differences, we can preliminarily predict the main directions of oil and gas migration and accumulation.

[0065] In an embodiment of the present invention, the geological processes and evolutionary events in the oil and gas accumulation process are identified based on the tectonic evolution history, sedimentary history, thermal evolution history and fluid evolution history of the differentiated tectonic belt; based on the geological processes and evolutionary events in the oil and gas accumulation process, the distribution of accumulation areas in the study area and the formation period of the accumulation areas are predicted.

[0066] Through the "Four Histories" study, the burial and thermal histories of Lower Cambrian source rocks in different regions within the study area were analyzed. Burial history provides the geological context for source rocks, while thermal history reveals their temperature variations. Oil and gas generation requires favorable temperature conditions, while thermal history determines the stages and timing of hydrocarbon generation, and burial history explains the geological context and processes.

[0067] Figure 5 This is a schematic diagram of the analysis results of the "Four Histories" of the research zone in the embodiment of the present invention. According to isotope geology, by analyzing the 40 Ar and 36 The ratio of Ar, 39 Ar and 36 The ratio of Ar can be used to analyze the formation process of geological samples and thus obtain the geological age at different depths. Figure 5 As shown, a geological sample 39 Ar / 36 The initial value of Ar was 409.5±9.6, and the mean squared weighted deviation (MSWD) was 0.89. Figure 5 The isochron of the isotope ratio can determine the age of the sample to be 125.8±8.2 (unit: million years Ma). Figure 5 The red dotted line in the middle is the GR curve, ranging from 0 to 200; the purple dotted line is the resistivity curve. Figure 5 The symbols for Chinese geological time periods are as follows: ∈ for Cambrian, O for Ordovician, S for Silurian, D for Devonian, C for Carboniferous, P for Permian, T for Triassic, J for Jurassic, K for Cretaceous, E for Paleogene, and Q for Quaternary. Figure 5 Ro refers to the vitrinite reflectance, which is an important indicator for measuring the maturity of organic matter. The higher the vitrinite reflectance, the higher the maturity of the organic matter and the greater the hydrocarbon generation potential. The sequence of filling types changing with geological time, the homogenization temperature of source rocks in different geological ages, the tectonic movements occurring in different geological ages (including the period and type of tectonic movements), the pore evolution history, the maturity of source rocks in different geological ages, the oil and gas accumulation process and the hydrocarbon generation in this process can all be found in Figure 5 .

[0068] For example, Figure 5As shown, the hydrocarbon generation evolution of source rocks can be divided into three distinct stages: a low-mature to mature stage before the end of the Permian, a peak hydrocarbon generation stage during the Permian-Triassic, and a post-Triassic stage of overmature dry gas generation. Paleohighs vary in tectonic location and burial depth, with thermal evolution of source rocks in high areas of paleohighs significantly lagging behind that in depressed areas. Inclusion studies reveal that the end of the Permian, end of the Triassic, and end of the Cretaceous were key periods for the formation of Cambrian natural gas accumulation. The O-T2 (T2 represents the Middle Triassic) represents the paleo-reservoir formation phase; the T3-end of the K (T3 represents the Late Triassic) represents the paleo-reservoir cracking and gas reservoir formation phase; and the end of the K to the present represents the gas reservoir destruction and adjustment phase. Combined with the tectonic evolution, distribution of hydrocarbon source kitchens and distribution of favorable lithofacies in the study area, it is preliminarily believed that the paleo-uplift in the middle of the study area, both sides of the rift in the central area of ​​the study area, the periphery of the evaporative lagoon and the area above the large fault zone superimposed on the grain beach are the dominant directions of oil and gas migration and accumulation, thus determining the reservoir-forming area.

[0069] In one embodiment, the location of the traps in the predicted reservoir area is identified, and the trap types and trap formation periods are analyzed; within the reservoir area of ​​the study zone, favorable areas for oil and gas reservoir preservation are divided according to the trap types and trap formation periods.

[0070] In one embodiment, the time factor further includes: the period of trap formation; the spatial factor further includes: the location of the trap and the distribution of favorable areas for oil and gas reservoir preservation.

[0071] Typically, the planar boundary types of oil and gas zones include: basin-tectonic unit boundaries, six types of structural differentiation within cratons, reservoir lithologic or physical property change boundaries, fault or stratigraphic pinchout zones, and oil and gas migration and accumulation unit boundaries. The delineation of oil and gas zones involves multidisciplinary knowledge. The present invention comprehensively analyzes spatiotemporal factors derived from multidisciplinary research to improve the accuracy of oil and gas zone delineation.

[0072] In the embodiment of the present invention, the exploration area is selected based on the time factors and spatial factors within the study area; wherein the time factors include: the period of oil and gas generation in the source rock and the period of formation of the reservoir, and the spatial characteristics include: the distribution of the source rock and the distribution of the reservoir.

[0073] For example, a spatiotemporal analysis was conducted on the Cambrian Longwangmiao and Xixiangchi Formations within the study area. Based on spatial factors such as the distribution of source rocks, reservoir-forming areas, favorable lithofacies, trap locations, and areas favorable for oil and gas reservoir preservation, combined with temporal factors such as the period of source rock oil and gas generation, reservoir formation, and trap formation, a comprehensive study was conducted to delineate oil and gas zones and select exploration areas.

[0074] Gypsum-salt-carbonate reservoir systems can be divided into supra-salt, inter-salt, and sub-salt systems. The Cambrian gypsum-salt-carbonate reservoir system in the study area can be divided into two major oil and gas reservoir systems: inter-salt and supra-salt. Oil and gas reservoir systems in different regions are controlled by different geological factors, so the parameters and criteria for analyzing oil and gas enrichment zones should also vary. For supra-salt reservoir systems, gas source kitchens (source rocks), oil and gas migration and traps, and preservation conditions are key; for inter-salt reservoir systems, high-quality reservoirs, gas source kitchens, lateral barriers, and localized caprocks are key; and for sub-salt reservoir systems, gas source kitchens, traps, and high-quality reservoirs are key.

[0075] Specifically, the time-space matching conditions of source-reservoir-cap in the central part of the study area are superior, making it the most favorable oil and gas accumulation area; the source-reservoir conditions in the eastern part of the study area are relatively good, but drilling of a well No. 5 Ke 1 in the east shows that the Longwangmiao reservoir has poor physical properties and the Xixiangchi Formation reservoir has good physical properties, but has undergone strong later transformation and poor preservation conditions; the southern part of the study area has been in a slope area of ​​tectonic adjustment for a long time, the Wangmiao reservoir has poor physical properties, and the Xixiangchi Formation has developed a granular beach reservoir with a certain scale, but has undergone strong later transformation and poor preservation conditions.

[0076] The present invention also provides a device for zonal analysis of a combination of carbonate and gypsum salt rock, as described in the following embodiments. Because the principles underlying the device are similar to those of the zonal analysis method for a combination of carbonate and gypsum salt rock, the implementation of the device can be referenced to the implementation of the zonal analysis method for a combination of carbonate and gypsum salt rock, and any repetitions will not be repeated.

[0077] Figure 6 Schematic diagram of the zone analysis device for carbonate rock and gypsum salt rock combination in the embodiment of the present invention. Figure 5 As shown, the device includes:

[0078] The analysis unit division module 601 is configured to divide the study area into multiple analysis units based on the similarity of geological structural units, sedimentary facies belts, and oil and gas accumulation combination types within the study area; the oil and gas accumulation combination includes a rock combination with gypsum salt rock as the cap rock and carbonate rock as the reservoir; and the similarity of the geological structure, sedimentary environment, and accumulation characteristics of the oil and gas accumulation combination within each analysis unit exceeds a corresponding threshold.

[0079] The source rock analysis module 602 is used to predict the distribution of source rocks and the period of oil and gas generation in the study area by performing gas reservoir analysis and gas source analysis on each analysis unit;

[0080] Differentiation tectonic belt analysis module 603 is used to predict the distribution of differentiation tectonic belts in the study area based on the fault system of each analysis unit;

[0081] The reservoir analysis module 604 is used to: identify the geological processes and evolutionary events in the process of oil and gas accumulation based on the tectonic evolution history, sedimentary history, thermal evolution history, and fluid evolution history of the differentiated tectonic belt; and predict the distribution of reservoirs within the study area and the formation period of the reservoirs based on the geological processes and evolutionary events in the process of oil and gas accumulation;

[0082] The exploration area selection module 605 is used to select an exploration area based on the time and space factors within the study area. The time factors include the period of oil and gas generation in the source rocks and the period of formation of the reservoirs. The space factors include the distribution of source rocks and the distribution of the reservoirs.

[0083] In one embodiment, the analysis unit division module 601 is further configured to:

[0084] The thickness of gypsum-salt rock, the relationship between gypsum-salt rock and carbonate rock, and the distribution of gypsum-salt rock are analyzed to determine the type of oil and gas accumulation combination; the oil and gas accumulation combination types include: compact oil and gas accumulation combination and remote oil and gas accumulation combination.

[0085] In one embodiment, the source rock analysis module 602 is specifically configured to:

[0086] Conduct gas reservoir dissection and gas source analysis on each analysis unit, determine the locations of multiple gas sources in the reservoir development zone within the study area, and analyze the multi-stage oil and gas filling paths and multi-stage oil and gas migration paths of multiple gas sources;

[0087] By using the multi-stage oil and gas injection paths and multi-stage oil and gas migration paths of multiple gas sources, the distribution of source rocks and the oil and gas generation period of the source rocks in the study area are predicted.

[0088] In one embodiment, the differentiation structure band analysis module 603 is specifically used to:

[0089] Using seismic exploration technology and geological modeling methods, the fault structural characteristics of each analysis unit are obtained; the fault structural characteristics include: the development and distribution pattern of folds, the development and distribution pattern of faults;

[0090] Analyze the structural characteristics of the fault to obtain the type, scale, and activity period of the fault;

[0091] Based on the relationship between fault type and oil and gas migration and accumulation, the relationship between fault scale and oil and gas migration and accumulation, and the relationship between fault activity period and oil and gas migration and accumulation, the distribution of differentiated structural belts in the study area is predicted.

[0092] Figure 7 FIG. 1 is another schematic diagram of a zone analysis device for a combination of carbonate rock and gypsum salt rock according to an embodiment of the present invention. Figure 7As shown, the device further includes a lithofacies zone analysis module 701, which is used to:

[0093] Using geological, geophysical and geochemical data, analyze the tectonic setting, lithofacies characteristics and paleogeographic environment of each analytical unit, determine the sedimentary model of each analytical unit, and analyze the relationship between sedimentary model and oil and gas reservoirs;

[0094] Based on the relationship between sedimentary patterns and oil and gas reservoirs, favorable lithofacies areas are divided under the sequence framework.

[0095] In one embodiment, the spatial factors further include: the distribution of favorable lithofacies areas.

[0096] In one embodiment, the reservoir analysis module 604 is further configured to:

[0097] Identify the location of traps within the predicted reservoir area, analyze the trap types and the period of trap formation;

[0098] In the reservoir-forming area of ​​the study zone, favorable areas for oil and gas reservoir preservation are divided according to the trap type and trap formation period.

[0099] In one embodiment, the time factor further includes: the period of trap formation; the spatial factor further includes: the location of the trap and the distribution of favorable areas for oil and gas reservoir preservation.

[0100] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned carbonate rock and gypsum salt rock combination zone analysis method is implemented.

[0101] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method for zone analysis of the combination of carbonate rock and gypsum salt rock is implemented.

[0102] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the above-mentioned zone analysis method for the combination of carbonate rock and gypsum salt rock.

[0103] Compared with existing technical solutions that fail to fully utilize multiple geological information and have difficulty analyzing the enrichment of oil and gas reservoirs under the combined effects of reservoirs and caprocks, the embodiments of the present invention divide the oil and gas reservoir assemblages into different analysis units based on geological structural factors, sedimentary facies factors, and the combined characteristics of oil and gas accumulation. This ensures that the geological characteristics and accumulation conditions within the analysis units are more similar and consistent, providing a reasonable basis for subsequent analysis. Gas reservoir dissection and gas source analysis are performed on the analysis units to provide rich information for establishing oil and gas accumulation models. The relationship between caprocks and oil and gas migration is reflected by predicting differentiated structural zones. The sedimentary environment in the study area is analyzed to obtain lithofacies characteristics, thereby improving the accuracy of oil and gas enrichment analysis. The "four histories" (tectonic evolution history, sedimentary history, thermal evolution history, and fluid evolution history) are analyzed to understand the various geological processes and evolutionary events in the oil and gas accumulation process and predict the distribution and formation period of the accumulation areas. Finally, a comprehensive analysis of the distribution of source rocks, hydrocarbon generation capacity, and spatiotemporal factors of oil and gas migration is performed to select areas with favorable accumulation conditions as exploration areas, thereby improving exploration efficiency and success rate.

[0104] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0105] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0106] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1The function specified in one or more boxes.

[0107] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0108] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A zonal analysis method for a combination of carbonate rock and gypsum salt rock, characterized in that: include: According to the similarity of geological structural units, sedimentary facies belts and oil and gas accumulation combination types in the study area, multiple analysis units are divided in the study area; The oil and gas reservoir combination includes: a rock combination with gypsum salt rock as the cap rock and carbonate rock as the reservoir; the similarity between the geological structure, sedimentary environment and accumulation characteristics of the oil and gas reservoir combination in each analysis unit is higher than the corresponding threshold; By analyzing the gas reservoir and gas source of each analysis unit, the distribution of source rocks and the period of oil and gas generation in the study area are predicted; Based on the fault system of each analysis unit, the distribution of differentiated structural belts in the study area is predicted; Based on the tectonic evolution history, sedimentary history, thermal evolution history and fluid evolution history of the differentiated tectonic belt, the geological processes and evolutionary events in the process of oil and gas accumulation are identified; based on the geological processes and evolutionary events in the process of oil and gas accumulation, the distribution of accumulation areas in the study area and the formation period of the accumulation areas are predicted; Exploration areas are selected based on the temporal and spatial factors within the study area. Temporal factors include the period of oil and gas generation in source rocks and the period of formation of reservoirs, while spatial characteristics include the distribution of source rocks and the distribution of reservoirs.

2. The method according to claim 1, wherein Based on the similarity of geological structural units, sedimentary facies belts and oil and gas accumulation combination types in the study area, before dividing multiple analysis units in the study area, the following are also included: The thickness of gypsum-salt rock, the relationship between gypsum-salt rock and carbonate rock, and the distribution of gypsum-salt rock are analyzed to determine the type of oil and gas accumulation combination; the oil and gas accumulation combination types include: compact oil and gas accumulation combination and remote oil and gas accumulation combination.

3. The method according to claim 1, wherein Through gas reservoir dissection and gas source analysis of each analysis unit, the distribution of source rocks in the study area and the period of oil and gas generation of source rocks are predicted, including: Conduct gas reservoir dissection and gas source analysis on each analysis unit, determine the locations of multiple gas sources in the reservoir development zone within the study area, and analyze the multi-stage oil and gas filling paths and multi-stage oil and gas migration paths of multiple gas sources; By using the multi-stage oil and gas injection paths and multi-stage oil and gas migration paths of multiple gas sources, the distribution of source rocks and the oil and gas generation period of the source rocks in the study area are predicted.

4. The method according to claim 1, wherein According to the fault system of each analysis unit, the distribution of differentiated structural belts in the study area is predicted, including: Using seismic exploration technology and geological modeling methods, the fault structural characteristics of each analysis unit are obtained; the fault structural characteristics include: the development and distribution pattern of folds, the development and distribution pattern of faults; Analyze the structural characteristics of the fault to obtain the type, scale, and activity period of the fault; Based on the relationship between fault type and oil and gas migration and accumulation, the relationship between fault scale and oil and gas migration and accumulation, and the relationship between fault activity period and oil and gas migration and accumulation, the distribution of differentiated structural belts in the study area is predicted.

5. The method according to claim 1, wherein The method further includes: Using geological, geophysical and geochemical data, analyze the tectonic setting, lithofacies characteristics and paleogeographic environment of each analytical unit, determine the sedimentary model of each analytical unit, and analyze the relationship between sedimentary model and oil and gas reservoirs; Based on the relationship between sedimentary patterns and oil and gas reservoirs, favorable lithofacies areas are divided under the sequence framework.

6. The method according to claim 5, wherein Spatial factors also include: the distribution of favorable lithofacies areas.

7. The method according to claim 1, wherein Based on the geological processes and evolutionary events during the oil and gas accumulation process, the distribution of the accumulation areas in the study area and the formation period of the accumulation areas are predicted, and the following are also included: Identify the location of traps within the predicted reservoir area, analyze the trap types and the period of trap formation; In the reservoir-forming area of ​​the study zone, favorable areas for oil and gas reservoir preservation are divided according to the trap types and trap formation periods.

8. The method according to claim 7, wherein Temporal factors also include: the period of trap formation; spatial factors also include: the location of the trap and the distribution of favorable areas for oil and gas reservoir preservation.

9. A zone analysis device for a combination of carbonate rock and gypsum salt rock, characterized in that: include: The analysis unit division module is used to divide the study area into multiple analysis units based on the similarity of geological structural units, sedimentary facies belts, and oil and gas accumulation combinations within the study area. Oil and gas accumulation combinations include rock combinations with gypsum salt rocks as cap rocks and carbonate rocks as reservoirs. The similarity between the geological structure, sedimentary environment, and accumulation characteristics of the oil and gas accumulation combinations within each analysis unit exceeds the corresponding threshold. The source rock analysis module is used to: predict the distribution of source rocks and the period of oil and gas generation in the study area by performing gas reservoir dissection and gas source analysis on each analysis unit; The module for analyzing differentiated structural belts is used to predict the distribution of differentiated structural belts within the study area based on the fault systems of each analysis unit. The reservoir analysis module is used to: identify the geological processes and evolutionary events in the process of oil and gas accumulation based on the tectonic evolution history, sedimentary history, thermal evolution history, and fluid evolution history of the differentiated tectonic belt; and predict the distribution of reservoirs within the study area and the formation period of the reservoirs based on the geological processes and evolutionary events in the process of oil and gas accumulation; The exploration area selection module is used to select exploration areas based on the time and space factors within the study area. The time factors include the period of oil and gas generation in the source rocks and the period of formation of the reservoirs. The spatial characteristics include the distribution of source rocks and the distribution of the reservoirs.

10. The device according to claim 9, wherein The analysis unit division module is also used to: The thickness of gypsum-salt rock, the relationship between gypsum-salt rock and carbonate rock, and the distribution of gypsum-salt rock are analyzed to determine the type of oil and gas accumulation combination; the oil and gas accumulation combination types include: compact oil and gas accumulation combination and remote oil and gas accumulation combination.

11. The device according to claim 9, wherein The source rock analysis module is specifically used for: Conduct gas reservoir dissection and gas source analysis on each analysis unit, determine the locations of multiple gas sources in the reservoir development zone within the study area, and analyze the multi-stage oil and gas filling paths and multi-stage oil and gas migration paths of multiple gas sources; By using the multi-stage oil and gas injection paths and multi-stage oil and gas migration paths of multiple gas sources, the distribution of source rocks and the oil and gas generation period of the source rocks in the study area are predicted.

12. The device according to claim 9, wherein Differentiation structure belt analysis module, specifically used for: Using seismic exploration technology and geological modeling methods, the fault structural characteristics of each analysis unit are obtained; the fault structural characteristics include: the development and distribution pattern of folds, the development and distribution pattern of faults; Analyze the structural characteristics of the fault to obtain the type, scale, and activity period of the fault; Based on the relationship between fault type and oil and gas migration and accumulation, the relationship between fault scale and oil and gas migration and accumulation, and the relationship between fault activity period and oil and gas migration and accumulation, the distribution of differentiated structural belts in the study area is predicted.

13. The device according to claim 9, wherein Also includes a lithofacies analysis module for: Using geological, geophysical and geochemical data, analyze the tectonic setting, lithofacies characteristics and paleogeographic environment of each analytical unit, determine the sedimentary model of each analytical unit, and analyze the relationship between sedimentary model and oil and gas reservoirs; Based on the relationship between sedimentary patterns and oil and gas reservoirs, favorable lithofacies areas are divided under the sequence framework.

14. The device according to claim 13, wherein Spatial factors also include: the distribution of favorable lithofacies areas.

15. The device according to claim 9, wherein The reservoir analysis module is also used to: Identify the location of traps within the predicted reservoir area, analyze the trap types and the period of trap formation; In the reservoir-forming area of ​​the study zone, favorable areas for oil and gas reservoir preservation are divided according to the trap types and trap formation periods.

16. The device according to claim 15, characterized in that Temporal factors also include: the period of trap formation; spatial factors also include: the location of the trap and the distribution of favorable areas for oil and gas reservoir preservation.

17. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 8 is implemented.

18. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

19. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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