A method for reproducing the whole history of high temperature and overpressure natural gas reservoir formation

Abstract

The invention discloses a method for reproducing the entire historical process of the formation of high-temperature and overpressure natural gas reservoirs, belonging to the field of research on high-temperature and overpressure oil and gas accumulations. The method includes the following steps: S1, recovery of hydrocarbon source rock development and hydrocarbon generation dynamic process; S2, Historical restoration of natural gas migration trajectory; S3, reappearance of reservoir pore evolution process; S4, restoration of formation pressure evolution and charging dynamic evolution process; S5, evaluation of caprock gas sealing ability; The historical process of natural gas reservoir formation under high pressure conditions; the present invention provides an effective method for reproducing the entire life history process of natural gas reservoirs from "source" to "reservoir" under high temperature and overpressure conditions, which can effectively overcome the simple list of formations in static accumulation research. The disadvantages of reservoir elements can effectively restore the historical process of natural gas reservoir formation, clarify the distribution law of high temperature and overpressure natural gas, accurately predict the natural gas enrichment area in favorable accumulation areas, and improve the success rate of exploration.

Description

technical field [0001] The invention relates to the research field of high temperature and overpressure oil and gas accumulation, in particular to a method for reproducing the entire historical process of high temperature and overpressure natural gas reservoir formation. Background technique [0002] The analysis of oil and gas accumulation conditions in petroleum basins is the core content of exploration play and target selection evaluation. Oil and gas generated by mature source rocks migrated to traps and accumulated and preserved through a long geological history process. How to understand this geological The historical process is very important for delineating oil and gas enrichment areas, then evaluating favorable zones and selecting favorable targets. [0003] Traditional accumulation research methods are mostly based on static analysis of factors such as source rock characteristics, oil and gas spatial distribution characteristics of current oil and gas reservoirs, t...

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Problems solved by technology

[0003] Traditional accumulation research methods are mostly based on static analysis of factors such as source rock characteristics, oil and gas spatial distribution characteristics of current oil and gas reservoirs, transport system characteristics, trap reservoir-caprock characteristics, etc., lacking dynamic and comprehensive research on the entire accumulation process, especially There is a lack of in-depth research on the impact of reservoir evolution history and pressure evolution history on oil and gas accumulation in high temperature and high pressure basins, and it is impossible to accurately study the distribution of natural gas

[0004] Natural gas accumulation in high-temperature and overpressure basins faces many complex problems, and it is increasingly difficult to simply list various accumulation factors to analyze natural gas accumulation to meet the increasingly difficult exploration needs

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