不同油藏条件下相渗曲线分析

通过室内一维物理模拟实验，结合现场实际生产资料，开展不同油藏条件下一维恒 速水驱实验，对比不同油藏条件下油水相对渗透率曲线、特征点，分析相对渗透率曲线特征、束缚水饱和度、残余油饱和度及水相端点值的变化规律，研究结果表明：①对于稠油油藏虽然不同粘度的相渗曲线形态略有不同，但整体表现为油相相对渗透率高，水相相对渗透率非常低（水相相对渗透率端点值多数低于0.1），等渗点靠右，等渗区面积小的特点；②对于低渗透油藏，整体表现为束缚水饱和度和残余油饱和度都非常高，等渗区面积较窄，油相相对渗透率下降急剧、水相相对渗透率较高的特点。通过相渗曲线的特征可以定性地判断储层性质，为现场施工措施提供合理的指导。

The variation of relative permeability curves in the different reservoir

through the one-dimensional physical simulation combining with the actual production material, to carry out different conditions for one-dimensional constant reservoir Speed water flooding experiments comparing different reservoir conditions, oil-water relative permeability curves, characteristic points, analysis of relative permeability curves, irreducible water saturation, residual oil saturation and water phase changes of the endpoint values, the results show that: (1) for heavy oil reservoirs ,with different viscosity the relative permeability curve form a slightly different, but the overall performance for oil phase high relative permeability, water phase relative permeability is very low (water phase relative permeability endpoint value most below 0.1), and other seepage on the right point, the characteristics of small area of permeability; (2) for low permeability reservoirs, and the overall performance for binding water saturation and residual oil saturation is very high, and permeability of narrow area, oil phase relative permeability down sharply, water phase relative permeability of high. Through the relative permeability curve can judge the characteristics of qualitative reservoir property, to provide reasonable measures for the site construction guidance.