聚合物驱后凝胶微球调剖效果预测与评价方法

Prediction and evaluation of gel beads profile control performance after polymer flooding

陈先超 冯其红 张安刚 史树彬

CHEN Xianchao FENG Qihong ZHANG Angang SHI Shubin

中国石油大学华东石油工程学院，山东青岛　266580 中国石油勘探开发研究院，北京　100083 胜利油田有限公司采油工艺研究院，山东东营　257000

School of Petroleum Engineering, China University of Petroleum East China, Qingdao, Shandong 266580, China Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083 Oil Production Research Institute, Shengli Oilfield Company, Dongying, Shandong 257015, China

凝胶微球调剖是聚合物驱后进一步提高采收率的有效方法之一，但目前缺乏相应的效果预测与评价方法用于指导生产实践。为此首先建立了凝胶微球调剖含水率与采收率的解析预测公式，该公式可用于预测凝胶微球深部调驱的含水率、产油量、产水量等指标的变化规律；其次对概念模型的正交设计的数值模拟方案进行拟合，得到无因次增油倍数的经验预测公式，该公式可方便预测其提高采收率幅度和增油降水等指标；最后给出了注入井、生产井和区块3 个层次的凝胶微球调剖效果评价方法。研究结果表明，解析公式和经验公式可以快速准确地预测凝胶微球的调剖效果，分层次的效果评价方法可全面系统地评价凝胶微球调剖矿场实施效果。

Gel beads profile control is an effective technique to enhance oil recovery after polymer flooding. However, there is no relevant prediction and evaluation method to guide the field application. An analytical equation between water cut and recovery factor is presented for the technique, which can forecast the variation of oil/water production and water cut during the process of deep gel beads profile control. Many numerical simulation cases designed by orthogonal design method on the basis of conceptual model are fitted to derive the empirical prediction equation of dimensionless oil increment multiplier, which can be used to easily predict such indexes as enhanced oil recovery, incremental oil and reduced water. Finally, the evaluation method of gel beads profile control is proposed in a hierarchy of injection wells, production wells and block. The results show that the analytical equation and empirical equation can be used to quickly and accurately predict the performance of gel beads profile control and the hierarchal evaluation method can systematically appraise the field effects of gel beads profile control.

10.13639/j.odpt.2014.03.021