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生产井用凝胶充填作业时 ,如果油层不能够被隔离 ,那么凝胶降低水相渗透率的能力远大于降低油相渗透率的能力 ,这是措施成功的关键。本文针对凝胶能使两相渗透率不同程度下降的现象 ,作出几种解释。实验结果表明 ,这种现象不是由重力影响、润滑效应、凝胶的收缩与膨胀、岩石的润湿性引起的。油基凝胶实验结果说明 :通过孔隙介质油流、水流通道的分离在这种现象中占主导地位 ,然而仍需进行深入的工作来证实这一理论。
When a production well is filled with gel, the ability of the gel to reduce the permeability of the water phase is much greater than the ability to reduce the permeability of the oil phase, which is the key to the success of the measure. In this paper, gel can make the two-phase permeability decreased to varying degrees, made several explanations. The experimental results show that this phenomenon is not caused by the influence of gravity, lubrication effect, contraction and expansion of the gel, and wettability of the rock. The experimental results of oil-based gels show that the separation of water flow channels dominated this phenomenon through the pore-medium oil flow, however, further work is still needed to confirm this theory.