Application of gravity and seismic joint correction technology for slip deformation of gypsolyte-salt layers in deep exploration of high and steep structures in SZ area

By the recent geological research and new wells discovery in east Sichuan, the experts believe that multiple ancient geological units such as the Lower Paleozoic - Sinian uplifts and ancient rifts are conducive to oil and gas accumulation. Furthermore, they believe that the Sinian - Cambrian will become an important exploration layer for oil and gas exploration in this region. At present, due to too little 2D seismic data and fuzzy display of deep structures, it cannot meet the requirements for studying the Sinian - Lower Paleozoic rift. This article uses high-precision gravity and magnetic data in recent years and combines with seismic data to build the seismic velocity models. It researches the lateral variation of density in the gypsolyte-salt deformation and thickening areas and syncline areas of the Fangdoushan structure. It conducts seismic and non-seismic joint construction and density modeling for gypsolyte-salt layers local thickening of the Fangdoushan structure. Through techniques such as layer stripping and anomaly separation, the deep structural characteristics of the Fangdoushan structure are revealed.