During 100 years development,although it plays an important roles in the practice of oil/gas exploration,mechanism of oil and gas accumulation and distribution rules of oil saturation in structural reservoir are not resolved in this paper,capillary-buoyancy equation is deduced based on equilibrium theory between capillary and buoyancy,which starts from physical theory and correct.
背斜理论诞生100多年来,虽然在油气勘探实践中发挥重大作用,但对构造油藏中油气聚集机理及含油饱和度分布规律没有从理论上得到解决。
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