关键词: 济阳坳陷, “相-势”耦合, 成藏机理, 模拟实验, 砂体特征, 油气运移, 含油气预测

Abstract:

The relationships between facies and potential of 527 sand bodies in Jiyang Depression were analyzed. The connotations of facies-potential coupling effects on reservoir were discussed on the bases of two-dimensional simulation experiments on different sand configuration as well as high pressure and high temperature simulation of oil migration and accumulation in cores. The results showed that there exist different characteristics of facies-potential coupling effect on reservoir in different scales. In the sand body scale, there mainly reflects the different type of sedimentary facies, the characteristics of oil and gas accumulation are also different. In the sand layer scale, there mainly reflects the different of oil migration pathway and oil pay zone attributed to heterogeneity of the sand,variations of sand-shale composition and permeability difference. In the core scale, the flow characteristics of oil-gas migration and oil saturation are different. The oil-filled sand-bodies mainly lie in the two-high and one-low areas of PFR model for facies-potential coupling effect on reservoir developed by using energy condition, mobility and reservoir capacity. Facies-potential coupling effect on reservoir is a quantitative model with power function and can be used to predict hydrocarbon-bearing.

Key words: Jiyang Depression, facies-potential coupling, pool-forming mechanism, physical simulation, sand-body characteristics, oil-gas migration, hydrocarbon bearing prediction