Controlling Factors of Hydrocarbon Accumulation and Accumulation Model of Fuyang Oil Layer in the South of X Oilfield

In order to clarify the reservoir increasing capacity and development potential of Fuyang Reservoir in the southern area of X Oilfield, based on the study of structure, feature of the reserves and regular pattern of oil distribution, and overall analyse the various geological conditions of hydrocarbon accumulations, through various geologic factor and the relationship of time and scope, we can define the main controlling factors of hydrocarbon accumulation and accumulation model. Main controlling factors are effective source rock, paleotectonics and present-day tectonics before inversion deformation in the late Mingshui layer orphological, features of sand bodies. The favorable areas for oil enrichment are those that break through Fuyang oil layer and extend upward and terminate near the fault of Qingshankou Formation, the favorable structural areas of the predeformation in the late Mingshui layer and current structures, and the areas matching sand body near the oil source of Qijia-Gulong depression, and according to different oil sources, the one-way oil supply source ladder modal of lateral migration outside source and the two-way oil supply source ladder modal of lateral migration outside source have been established in different regions, laying a foundation for implementing the reserve increasing potential of the blank area and guiding the next economic and effective development.