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油藏中的流体作用力按表现形式可分为质量力（重力及浮力等）和表面力（界面张力）。浮力是影响油气运移的重要条件；重力对注水驱油过程作用明显；界面张力则控制了油藏中各种流体的分布，并对油藏剩余油的形成起相当大的作用。低渗透油藏流体渗流是非达西低速渗流，除细微孔隙中的分子力是较重要的作用力之外，实验证明：贾敏效应对低渗透油层也有不可忽视的影响。分析整理４个低渗透油藏（鄯善油田三间房组油组、安塞油田王窑区长６油层、科尔康油田白２块沙海组下段及五号桩油田沙三下Ⅱ油组）的真实微观模型实验结果发现：模型的水驱油排驱压力普遍大于油驱水排驱压力。从理论上讲，在岩石亲水或偏亲水的情况下，油驱水过程（排驱过程）所需压力应当大于水驱油过程（吸入过程）所需压力，但实验结果却恰恰相反。分析认为是贾敏效应的影响所致。同时实验结果还表明：贾敏效应的强弱与储集层岩石物性有明显关系，据此认为渗透率越低贾敏效应越突出。图２表１参５（郭海莉摘
The fluid forces in a reservoir can be divided into mass forces (gravity and buoyancy, etc.) and surface forces (interfacial tensions) according to their manifestations. Buoyancy is an important condition that affects the migration of oil and gas. Gravity exerts a significant effect on flooding and flooding. Interfacial tension controls the distribution of various fluids in reservoirs and plays a significant role in the formation of residual oil in reservoirs. Fluid seepage in low-permeability reservoirs is non-Darcy low-velocity seepage. Except for the molecular force in fine pores is an important force, experiments show that Jia-Min effect can not be neglected for low-permeability reservoirs. Analysis and sorting of four low permeability reservoirs (Shanshan Oilfield Sanfangfang Formation, Ansai Oilfield Wangyao Chang 6 reservoir, Keerkang Oil Field Baisha 2 Shahai Formation and Wulizhang Oil Field Sha 3 Ⅱ oil Group) real micro-model experimental results show that: the model of water-flooding displacement pressure is generally greater than the oil-water displacement pressure. Theoretically, when the rock is hydrophilic or partially hydrophilic, the pressure required to drive the oil-water-flooding process (drainage process) should be greater than the pressure required for the water-flooding process (suction process), but the test results are just the opposite. Analysis that is the impact of Jiamin effect. At the same time, the experimental results also show that there is a clear relationship between the strength of Jiamin effect and the petrophysical properties of reservoir rocks. Therefore, the lower the permeability, the more prominent Jiamin effect. Figure 2 Table 1 Reference 5 (Guo Haili Abstract