Analysis of Gas Reservoir Types and Main Controlling Factors of Enrichment and High Yield in Sichuan Basin

The formation of large and medium-sized gas fields in Sichuan basin is closely related to many main controlling factors, which have a significant control effect on oil and gas accumulation. Therefore, the analysis of gas reservoir types and main controlling factors of enrichment and high yield in Sichuan basin is put forward. Set up the basic framework of structural, stratigraphic, lithologic and fractured gas reservoirs, and analyze the geological background; The characteristics and main controlling factors of four gas reservoir types are explored, and on this basis, the concrete embodiment of sediment structure in the upper gas reservoir types in Sichuan Basin is analyzed, and the controlling effects of reservoir, structure and fracture are studied in the gentle fold area in central Sichuan. This paper analyzes the natural gas enrichment and high-yield models in western Sichuan thrust belt, northern Sichuan low-level fold belt and Xujiahe Formation. The experimental results show that this method can improve the analysis efficiency, effectively reduce the influence of data error and subjectivity on the analysis results, and the safety factor is high. With the passage of time, the permeability of gas reservoirs in different regions has decreased significantly.