坪北油田南区近年注采调整及效果分析

Injection-Production Adjustment and Result Analysis in the South Area of Pingbei Oilfield in Recent Years

坪北油田南区含油面积13.43km^(2),受区域条件限制,扩边调整潜力有限,为进一步提高区块开发水平,从分层储量动用情况、井网密度、水驱开发效果着手,深度剖析潜力阵地,立足现有井网,开展细分调整和周期注水工作,进一步优化注采井网,改善水驱效果,有效挖掘各类剩余油。调整后,南区产量由69.7t/d上升至103.1t/d,采油速度提高0.2个百分点。

As the oil-bearing area is 13.43km^(2) in the southern area of the Pingbei oilfield and restricted by the regional conditions,the extension adjustment potential is limited.In order to further improve the level of block development,based on the layered reserves producing,well spacing density and water-flooding development effect,we deeply analyzed the potential area,carried out the refined adjustment and periodic water injection in terms of the existing well pattern,further optimized the injection-production well pattern and improved the water-flooding effect,to effectively tap all types of remaining oil.After the adjustment,the production in the south area increased from 69.7t/d to 103.1t/d,and the oil recovery rate increased by 0.2 percentage points.