应用聚合物驱替特征曲线计算港西油田二三结合区块可采储量

Calculation on recoverable reserves of the second tertiary combined block of Gangxi oilfield by polymer displacement characteristic curve

在二三结合开发模式实施过程中,改变驱替介质会使产量及含水运行规律发生显著的变化,采用常规水驱特征曲线计算的可采储量不能反映二三结合区块的实际开发状况。为此,根据不同阶段的含水变化规律分析研究,建立改变驱替介质后含水变化规律的关系式,利用该关系式按定液求产原理计算二三结合区块的最终采收率及可采储量。应用结果表明,用该方法计算出的结果合理、可靠,较好地解决了二三结合过程中因驱替介质改变给标定采收率带来的困难。

During the implementation of the combined development mode of the second tertiary method, changing the displacement medium will significantly change the production and water-bearing operation regularity. The recoverable reserves calculated by using the conventional water drive characteristic curve cannot reflect the actual development status of the combination of the second tertiary method. Therefore, according to the analysis and research of water cut change regularities at different stages, the relational expression of water cut change regularity after changing the displacement medium is established, and the ultimate recovery and recoverable reserves of the second tertiary combined block are calculated according to the production principle of fixed liquid. The application results show that the results obtained by this method are reasonable and reliable, and the difficulties caused by the change of displacement medium in the process of combination of the second tertiary method are solved.