关键词: 桩海地区, 古潜山, 油气聚集, 应力场, 压力场, 流体势场

Abstract: The data of drilling,logging,3D seismic and velocity spectrum were used to simulate the stress field,pressure field and fluid potential field of Archaean buried hill oil pool of Zhuanghai area in Shengli Oilfield with the finite element method,Fillippone method and Hubbert method.The characteristics of dynamic fields and the relationship between dynamic fields and hydrocarbon accumulation were analyzed.It is revealed that hydrocarbon accumulation of oil pool in buried hill was controlled directly by dynamic fields.The tensile stress,higher pressure coefficient in whole normal condition and higher ground temperature gradient were responsible for abundance of hydrocarbon accumulation.In addition,oil and gas in buried hill migrated from high fluid potential zone to low potential zone and accumulated in the sealed low potential zone.The efficiencies of oil and gas migration and accumulation were influenced greatly by the shapes of contour line of fluid potential field in local area.

Key words: Zhuanghai area, buried hills, hydrocarbon accumulation, stress field, pressure field, fluid potential field