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根据烃类生成、构造活动和圈闭形成的阶段性,以及油气运移聚集存在分段捕获的原理,对川中—川南过渡带安岳—包界地区上三叠统须家河组须二段油气成藏过程进行了研究。结果认为,该区北部的安岳—通贤地区主要捕获了须家河组低演化系列煤成烃类,由于构造运动改变了油气运聚方向,未能进一步捕获后期较高演化阶段的烃类,具有分段捕获的特点;而该区南部的包界地区不仅捕获了低演化阶段的烃类,同时还捕获了成熟—高熟早期须家河组煤成烃类,具有连续累积捕获的特点。
According to the stages of hydrocarbon generation, tectonic activity and trap formation, and the principle of sub-catchment of hydrocarbon migration and accumulation, Oil and gas accumulation process has been studied. The results suggest that the Anyue-Tongxian area in the northern part of the area mainly captures the low-evolution coal-bearing hydrocarbons of the Xujiahe Formation. As the tectonic movement changed the direction of hydrocarbon migration and accumulation, it failed to further capture the hydrocarbon in the later evolution stage , Which has the characteristics of staged capture. In the southern boundary area of the area, not only the hydrocarbons of low evolution stage but also the coal-forming hydrocarbons of the Xujiahe Formation in mature-high-mature period have been captured with the characteristics of continuous accumulation .