摘要
For Huimin Sag, the middle-shallow formations were well recognized,and its hydrocarbon exploration at the middle stage, while the middle-deep formations have complex structures and its hydrocarbon exploration is still at the early stage. After studying abundant geophysical data and local geologic data, the Cenozoic tectonic characteristics were analyzed, and stereo structure interpretation was carried out on the south slope in Huimin Sag. Then, the NWW shear belt of Mesozoic base and its concomitant structures were discovered. It is thought that Cenozoic and Mesozoic were separately controlled by the tense-shear stress generated in the Himalayan movement and the compressive-shear stress field generated in the Yanshanian movement period.