济阳坳陷不同沉积相砂体“相-势”耦合控藏作用

Effects of"facies-fluid potential"coupling on oil accumulation in different sedimentary sands of the Jiyang depression

济阳坳陷不同沉积相砂体的"相"、"势"统计表明:物性与流体势具有一定耦合关系."相-势"耦合控藏主要体现在对油气聚集特征与油气充满度的影响.砂体的沉积相类型不同,油气聚集特征与油气充满度亦不同.砂体的"相-势"耦合控藏临界条件呈幂指数关系.不同类型沉积体系具有不一样的幂指数关系."相-势"耦合关系受异常压力、断层、砂体连通性等因素的影响."相-势"耦合定量模型揭示了储层有效接纳油气的临界条件,进一步丰富了断陷盆地油气勘探理论与方法.

The geological statistics results for ＂porosity and permeability-fluid potential＂ of different sedimentary facies sands in Jiyang depression showed that the physical properties of fluids have a certain potential coupling relations. Porosity and permeability and fluid potential coupling manifested mainly in the possession of the oil and gas accumulation are full of features and the impact of oil and gas. Sand facies of the different types and characteristics of oil and gas accumulation of oil and gas is also different. Sand in the porosity and permeability and fluid potential coupled with possession critical condition is of exponential relationship. Different types of deposition system are not of the same exponential relationship. Porosity and permeability and fluid potential of the coupling is impacted by abnormal pressure, faults, sand connectivity factors. Porosity and permeability and fluid potential coupled quantitative model reveal valid acceptance of the oil and gas reservoir critical condition, and further enrich the rift basin oil and gas exploration theory and methods.