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早在1933年,R·D·Wyckoff 等人就提出了重力对水驱油影响的问题。依据大庆油田开采中暴露出来的一些问题,如厚油层底部先见水,水淹厚度小等,1973年大庆油田研究院在驱动力的估计及提高注采强度的理论依据一文中,曾认为产生油水重力分离的重力梯度可达驱动力梯度的1/3—1/7,适当地增大注水强度,有利于抵制油水重力分离的不利影响。1975年,在厚层试验区葡 I_(1-2)油层强注强采油水运动特点的研究中,认为重力是水驱油过程中一个不可忽视的因素。1976年,在河流沉积油砂体模型水驱油实验研究中,也考虑了重力的影
As early as 1933, R. Wyckoff et al. Raised the question of the effect of gravity on water flooding. According to some problems exposed in the exploration of Daqing oil field, such as pre-thick water at the bottom of thick oil reservoirs and small flooding thickness, Daqing Oilfield Research Institute estimates the driving force in 1973 and enhances the strength of injection and recovery based on a theoretical basis, The gravitational gradient of oil-water gravity separation can reach 1 / 3-1 / 7 of the driving force gradient, and appropriately increase the water injection intensity, which is favorable to resist the adverse effects of gravity separation of oil-water. In 1975, in the study of the characteristics of strong and strong oil-producing water in I_ (1-2) reservoir in the thick test area, gravity was regarded as a factor that can not be neglected in the process of water flooding. In 1976, in the river sedimentary oil sands model water flooding experimental study, also considered the shadow of gravity