彩南油田彩9井区三工河组高温油藏分层调剖技术

Stratified Profile Modification Technologies for High-Temperature Reservoir of Sangonghe Formation in Wellblock Cai-9 of Cainan Oilfield

针对彩9井区三工河组油藏目前吸水剖面不均、油层动用程度下降的实际情况,提出了采用分层注水技术并进行层内调剖以改善吸水剖面、提高水驱效果的技术措施。以具有良好耐温性、稳定性和封堵性的酚醛体系为调剖剂,2006年7月在彩南三工河组油藏2口井中实施了调剖试验,一年内已累积增油1247t,取得了很好的效果。

The Sangonghe reservoir in Wellblock Cai-9 has been produced by stratified water injection and internal profile modification to improve the injection profile or waterflooding efficiency due to its uneven injection profile and decreased producing percent. The high- intensity and anti-high-temperature phenolaldehyde gel system is used as a profile control agent to investigate the effects of polymer concentration and promoter on gel quality. The results show that the phenolaldehyde gel system features good temperature tolerance, thermal stability and plugging property. Case studies from two wells in Sangonghe reservoir in July 2006 showed incremental oil production of 1 247 t up to July 2007, indicating that this system is effective and feasible to the reservoir.