安塞低渗油田孔隙结构对渗流特征曲线的影响

The effect of pore structure on the characteristics of percolation flow curves of Ansai low-permeability reservoir

渗流曲线的测定是认识油藏流体渗流规律的基础。实验发现安塞油田储集层岩心渗流曲线在低有效净围压下近似表现为两段直线 ,通过压汞实验和毛管压力曲线数据分析 ,认为这种特征与储集层孔隙结构有关。在分析渗流特征时应综合考虑孔隙结构特征、流体与孔隙介质的相互作用等因素。图 3参

Measuring flow characteristics curve is the foundation of studying percolation mechanism. Throught experiment, it was found that the percolation flow curves of reservoir cores from Ansai oil field present two straight lines under low effective net confining pressure, it is held that the morphological feature of percolation flow curve is related to reservoir pore structure from mercury injection experiment and analysis of capillary pressure curves. Therefore, the influence of pore structure and the interaction between liquid and rock of reservoir should be of consideration in analyzing the characteristics of percolation flow curves and studying the flow mechanism of low permeability reservoir.