杏六区中部葡Ⅰ1—3油层聚合物驱布井方式研究

Well spacing pattern of polymer flooding in PuⅠ1-3 reservoirs in central Xing6 District

胡伟 李璐 苏聪

长江大学石油工程学院，湖北 荆州 434023 中海油能源发展监督监理井下技术公司，天津 300452 重庆科技学院，重庆 401331

School of Petroleum Engineering, Yangtze University, Jingzhou 434023, China CNOOC Downhole Technology Company of Energy Development and Supervision, Tianjin 300452，China Chongqing University of Science and Technology，Chongqing 401331, China

杏六区中部在40多年的开发历程中，先后经历了基础井网、一次加密和二次加密调整。到2009年12月底，区块平均综合含水率为92.6%，处于特高含水期开采阶段。通过分析葡Ⅰ1—3油层动用状况和剩余油分布特征，提出了以该油层整体作为一套层系、利用分注工艺降低层间影响的聚合物驱开发方式：聚合物驱注采井距保持在150 m或小于150 m的范围，在原一次加密调整井排和二次加密调整油井排间布一排注聚合物井，形成采出井和注入井排，排距为100 m，井排上井距为200 m，注采井距141 m的五点法面积井网。在此基础上，预测了开发效果和经济效益。该布井方式对类似油藏聚驱井网部署及调整具有一定的指导意义。

Central part of Xing 6 District has undergone basic well pattern, primary infill and secondary infill adjustments in the development history over 40 years. By the end of December 2009, comprehensive average water cut was 92.6% in the district, which was at ultra-high water cut stage. Through analysizing on the producing degree and remaining oil distribution characteristics of PuⅠ1-3 reservoirs, this paper puts forward a set of development mode of polymer flooding used separate injection technology to decline the intrabed effect, which regards the PuⅠ1-3 reservoirs as a set of strata series. Injection-production well spacing of polymer flooding is maintained in the range of 150 m or less than 150 m. A row of polymer flooding wells is located between primary infill well line and secondary infill well line, which forms the five-spot areal well pattern of production well and injection well line, in which the line spacing is 100 m, well spacing is 200 m in well line and injection-production well spacing is 141 m. This paper predicts the development effect and economic benefits, which is of a guiding significance for future well pattern deployment and adjustment of polymer flooding.

10.6056/dkyqt201301016