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葡萄花油层肇261区块于2002年投产,采用线状井网同步注水开发,开发过程中表现出低含水采油期短,含水上升速度快,在坚持低速注水政策下,注采比仍较高。根据该区块地质特征及开发特点,提出周期注水,通过其理论研究表明,肇261区块采取周期注水可行。在实施过程中,通过理论计算注水周期,再根据水井压降变化,确定最终的注水周期。通过实施周期注水,试验区含水上升速度得到控制,稳油控水效果好。
The Putaohua block, Zha 261, was put into operation in 2002. It was developed using linear well pattern synchronous waterflooding. During the development process, the low water cut has a short oil recovery period and the water cut rate has risen rapidly. Under the low-speed water injection policy, the injection-production ratio is still relatively high . Based on the geological characteristics and development characteristics of the block, periodic water injection is proposed. Through its theoretical study, it is feasible to adopt periodic water injection in Zhao 261 block. In the process of implementation, the cycle of water injection is calculated theoretically, and then the final water injection cycle is determined according to the pressure drop of the well. Through the implementation of cycle water injection, test area moisture rise rate is controlled, stable oil control effect is good.