萨中萨零组油藏注水开发试验

Empirical study on water flooding development of Sa-0 Member in Sazhong Oil Field

萨零组油藏为中低孔渗储层,储层中粘土矿物含量高,表现出强水敏特征。为了注水开发保护储层,对储层的伤害机理与防治措施进行了室内实验研究,通过大量的静态与动态模拟实验,说明了油田注入水对储层造成的伤害,并阐述了影响因素。考虑在注水过程中控制粘土矿物的水化膨胀和分散运移,稳定注水井的注入能力,对现场即将使用的多种粘土稳定剂进行了评价,优选出了与萨零组油藏配伍的粘土稳定剂,为萨零组的注水开发奠定了基础。

Sa-0 Member is a medium-low permeable reservoir with a high clay mineral content and strong water sensitivity. This paper studies the mechanism and prevention measure of reservoir damage. It also discusses the damage caused by flow rate sensitivity and water sensitivity and its influential factors. It considers to add the clay stabilizer into the injected water to control the clay swelling and dispersion and migration so as to stabilize the injectivity of injection wells. It evaluates several kinds of clay stabilizers which will be used in the fields and selects the optimum clay stabilizer which can be compatible with Sa-0 Member.