复合交联聚合物凝胶调剖体系在杨家坝油田杨10-3井组的应用

Application of profile modification system of the compound cross-linked polymer gel in Yang 10-3 well group of Yangjiaba Oilfield

针对杨家坝油田杨10-3井组低渗透裂缝性油藏的特征和开发状况,进行了井组调剖的必要性分析,根据示踪剂监测结果研究了油藏窜流通道的方向和尺寸,分析了二次交联凝胶和预交联颗粒的调剖机理,研究了预交联颗粒和二次交联凝胶的复合调剖配方,优化调剖施工参数。现场实施后杨10-3井注水压力由0上升至10.2MPa,截至2006年12月底,该井组增产原油1717.3t,有效注水量达6337m3。

Based on feature and the production behavior of the low-permeability fissured oil reservoir in Yang 10-3 well group of Yangjiaba Oilfield,a necessity analysis of profile modification is done. According to the inter-well tracer test results, the orientation and size of channeling path in the reservoir are described. Profile modification mechanism of the secondary crosslinking gel and pre-crosslinked particles are analyzed. The compound formulas of the above two are studied and the parameters of the profile modification are optimized. After field application, water injection pressure of Yang 10-3 well increased from 0 to 10. 2 MPa. Incremental oil production in this well group is 1 717. 3t and effective water injection quantity is up to 6 337 m3 at the end of December,2006.