【摘要】 人们最早观察到背斜中出现油气的现象而诞生了背斜学说,后来演化成构造学说及重力学说。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。该文从毛细管力与浮力平衡理论推导出毛-浮方程,是从物理学原理出发,用数学方程准确刻划了构造油藏内石油的聚集成藏过程,是构造油藏含油饱和度增长的基本原理。同时指出油气二次运移驱动力的性质决定运动流体的状态及流动模式,浮力流是油气聚集成藏的最主要的充注方式。石油无论以何种流动方式注入构造,在油藏形成过程中都要经过重力分异作用,通常所说的油藏的构造因素实质是浮力因素。更多还原

【Abstract】 According to the observation of oil and gas in anticline, anticline theory is born and then it evolves tectonics and barodynamics.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 correctly introduces the process of petroleum accumulation and reservoir forming in structural reservoir,and also is basic theory of increasing oil saturation.Furthermore,state of movement fluid and flow mode are controlled by property of oil/gas secondary migration,and buoyancy flow is the key filled and injected method for hydrocarbon reservoir forming.In the process of reservoir forming,oil injected structure by any method goes through gravitational differentiation and the essence of reservoir structural factor is buoyancy.更多还原