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方法以实验研究为基础，结合安塞、玛北、石西等油田实际情况，研究了低渗多孔介质中流体渗流特征和有效压力的变化对低渗多孔介质的影响及其对开发效果的影响。目的为低渗透油田开发提供依据。结果由于岩石孔隙表面存在“吸附滞留层”，使低渗多孔介质中流体渗流为非达西渗流；有效压力对渗流特征的影响，表现为有效压力对孔隙结构的影响；随有效压力的增大，储层渗透率逐渐减小；低渗透储层径向流的泄油半径远小于线性流的泄油半径。结论开发低渗透油藏，必须采取特殊的开发方案（如压裂改造或打水平井等），以改变原油的流动方向，变径向流为线性流。
Methods Based on the experimental study and the actual conditions of Ansai, Mabei and Shixi oilfields, the influence of fluid flow characteristics and effective pressure on the permeability of porous media in low-permeability porous media and its influence on the development results were studied . The purpose is to provide a basis for the development of low permeability oilfields. As a result, the fluid seepage in the low-permeability porous media is non-Darcy seepage due to the existence of “adsorption-retaining layer” on the pore surface of the rock. The effect of effective pressure on the seepage characteristics is shown by the effect of effective pressure on the pore structure. With the increase of effective pressure , The reservoir permeability decreases gradually; the radius of the radial flow in the low permeability reservoir is much smaller than that of the linear flow. Conclusion In the development of low-permeability reservoirs, special development schemes (such as fracturing or horizontal drilling) must be adopted to change the flow direction of crude oil and reduce radial flow to linear flow.