Control of strike-slip faulting on reservoir formation of oil and gas in Nanpu sag

According to the data of seism, gravity, drilling etc, this article reexamines the Baigezhuang fracture and the Xiʹnanzhuang fracture and analyzes the control of structural deformation on the hydrocarbon accumulation in the Nanpu sag. The Baigezhuang and Xiʹnanzhuang fractures merged into a base strike-slip fracture, which had distinct left strike-slip at the Yanshan stage lasting until the Es stage and controlled the Es deposition. The Paleogene basin-forming in the Nanpu sag was controlled by the left strike-slip Baigezhuang-Xiʹnanzhuang base fracture with the Nanpu sag as a strike-slip stretching sag. The NE and NW strike-slip fault belts with conjugate shearing were formed by the Neogene fault strike slipping and controlled the distribution of secondary structural belts. The substantial hydrocarbon accumulation in the Nanpu sag has matched in time with the Neogene fault movement, which is favorable to oil and gas migration and trap formation, therefore, the oil and gas are distributed vertically along fault belts as multiple layers.