大庆油田萨零组储层水驱开发效果研究

Study on waterflooding effect of Saling Formation reservoir in Daqing Oilfield

萨零组储层作为高含水后期开发的接替潜力资源,具有一定的油气丰度。萨零组属低渗透、强水敏性储层,应用常规完井方法均不能使萨零组油层获得正常产能,通过添加防膨剂的压裂技术改造萨零组油层,提高了产液能力,初期平均单井产油量达2.0t.d-1以上。用防膨剂有效地解决了强水敏问题,同时研究了萨零组储层注水开发的可行性,对合理开发萨零组、寻找新的可采储量具有重要意义。

Saling Formation reservoir bears a definite hydrocarbon abundance as the replaced potential resources at the late stage of high water-cut in Daqing Oilfield.Both the lab experiment and the field test show that Saling Formation reservoir is a low permeability and high sensitive zone.The normal productivity has not been got using the conventional well completion methods.But applying hydraulic fracturing with antiswelling agent obtained a high productivity with daily output over 2.0 tons,and the waterflooding obtains a good effect by using antiswelling agent.The antiswelling agent successfully solves the high water sensitivity of Saling Formation reservoir.At the same times,waterflooding feasibility and recoverable reserves of Saling Formation reservoir were all well studied.