RELATIONSHIP BETWEEN THE CENOZOIC FAULTS AND HYDROCARBON IN THE LIAOHE BASIN

The Liaohe Basin is a rift basin with the main basinforming period in the Cenozoic. Faulting and rifting were the dominant styles for the Cenozoic tectonic deformation. Episodic faulting resulted in the periodic extension and contraction of sedimentary spaces and lakebasin scopes, and controlled source rocks, reservoirs and cap rocks as well as their assemblage characteristics. The development of faults played an important role in the enrichment of hydrocarbon, and controlled the migration and accumulation of hydrocarbon. In this paper, the influence of faults on hydrocarbon was summarized thoroughly and systematically. It was considered that major faults controlled the enrichment of hydrcarbon, and the development and evolution of faults had an important enfluence on hydrocarbon resources. Secondary faults took an important part in the lateral plugging and redistribution of hydrocarbon, and the opening property of faults resulted in poor or rich hydrocarbon in different districts. Faults controlled the development of special reservoir fractures, and played a critical role in the formation of traps. Therefore, correct understanding of faults will have very important significance to hydrocarbon exploration.