摘要
压裂前后非自喷井的压力恢复曲线形态有所差异。通过实例 ,对非自喷井压力恢复曲线形态进行了分析 ,并对导数后期曲线上翘或下掉反映油气藏是否存在边界问题进行了研究。指出用试井资料计算的地层参数 (如裂缝半长xf、表皮系数S)是评价压裂效果的最佳参数 ,也是制订下步施工方案的重要依据。但对于测恢复曲线的井 ,产量一定要按标准达到稳定 ,且要有足够的、适当的关井时间。
To a non-flowing well, the forms of pressure build-up curves before and after fracturing have some difference. This paper analyzes, through actual cases, the forms of pressure build-up curves from non-flowing wells and studies whether boundary problems exist in case that late time derivative curve raises or drops. This paper indicates that the formation parameters (ex: fracture half-length x f , skin factor S )are the best parameters to evaluate fracturing results as well as an important basis for working out next step operation program. But to the wells which need to test build-up curve, flow rate must be stable as required,adequate and appropriate shut-in time is also necessary.
出处
《油气井测试》
2000年第1期30-33,共4页
Well Testing
关键词
抽油井
压力恢复曲线
试井
油层压裂
非自喷井
pumping well, pressure buildup curve, fracturing, combined reservoir
