付云川 王成胜 周文超

摘      要：油水相渗规律的研究是油藏开发的关键，是油田生产预测和数值模拟分析的重要依据。海上稠油油田多层合采条件下，随着开发进行，同一储层内部和不同储层之间的油水渗流状态均有所不同。通过室内实验，研究黏度、驱替压力、储层渗透率对油水相对渗透率的影响规律，结果表明：随油相黏度增大，油水兩相渗流能力降低;随驱替压力增大，两相渗流区域变宽;随储层渗透率降低，油水两相渗流能力降低。根据几种油水相对渗透率研究规律，提出生产调整和提高采收率措施建议，为海上稠油油田多层系综合开发提供技术支持。

关  键  词：稠油油田;多层合采;油水相渗;驱替压力;储层渗透率

中图分类号：TE53        文献标识码： A       文章编号： 1671-0460（2020）05-0798-04

Abstract： The study of oil-water phase permeability is the key to reservoir development and the important basis for oil production prediction and numerical simulation analysis. Under the condition of multi-layer co-production in offshore heavy oil fields， the oil and water seepage states are different within the same reservoir and between different reservoirs with the development of the oil field. In this paper， the effect of viscosity， displacement pressure and reservoir permeability on oil and water relative permeability was studied through laboratory experiments. The results showed that，with the increase of oil viscosity， the seepage capacity of oil and water phase decreased; with the increase of displacement pressure， the seepage area became wider; with the decrease of reservoir permeability， the seepage capacity of oil and water phase decreased. Based on the research rules of oil and water relative permeability， some measures to adjust production and improve oil recovery were put forward. The paper can provide technical support for the comprehensive development of multilayer systems in offshore heavy oil fields.

Key words： Heavy oil fields; Multi-layer production; Oil-water relative permeability; Displacement pressure; Reservoir permeability

随着海洋石油的高速发展，油田的开发将先后经历上产期、稳产期、衰减期等不同的开发阶段。非均质性严重的多层稠油油藏，由于原油黏度较高的影响，注水开发过程中，水驱的压力梯度较大，每个生产层位在不同驱替速度和驱替压力条件下的油水两相渗流规律也会发生变化。在一套井网多层笼统注水开采条件下，不同层系的渗透率、孔隙度、均质性等物性参数不同，导致吸水能力不同，传导压力性能也不同，层间压力差别很大。层间干扰使层间流体渗流状态发生改变，每个层位的驱替压力梯度、渗流速度等都会发生变化，从而影响油田采收率。本文研究黏度、驱替压力、储层渗透率对稠油油田油水相对渗透率影响规律和影响机制。……