双重介质复合数值试井技术在裂缝性礁灰岩底水油藏中的应用

针对流花11-1油田解析试井结果与地质和动态特征吻合程度差的问题,综合考虑地质模型、生产历史、重力毛管力、相对渗透率曲线,运用多层裂缝性底水油藏的水平井数值试井解释方法,形成裂缝性底水油藏水平井双重介质复合数值试井技术。在整体压力恢复测试资料中筛选出40口井用于压力恢复数据,进行双重介质复合数值试井解释,该方法既考虑了底水能量,又考虑了多层之间渗透率的差异。结合现有地质认识,该数值模型解释结果表明,油田压力恢复试井曲线主要存在线性流、双线性流和双孔渗流3种流动特征。针对不同类型井建议减小生产压差或者采取稳油控水方式进行改造,对实际生产具有指导意义。

Application of dual-media compound numerical well test technology in fractured reef limestone reservoirs with bottom water

In view of the poor coincidence between analytical well test results and geological and dynamic characteristics in Liuhua 11-1 Oilfield, the dual-media compound numerical well test technology for horizontal wells in fractured reservoirs with bottom water is formed by comprehensively considering geological model, production history, gravity, capillary force and relative permeability curve. Forty wells were selected from the overall pressure build-up test data for dual-media compound numerical well test interpretation. In this method, both bottom water energy and permeability difference between layers are considered. Combines with the existing geological knowledge; The numerical model interpretation results show that:the oilfield pressure build-up well test curves mainly have three flow characteristics: linear flow, bilinear flow and dual-porosity seepage. According to different types of wells, it is suggested that this well can be stimulated by increasing production pressure difference or stabilizing oil and controlling water. This study has a reference for the development of similar reservoirs,which provides references for prodution.