应用随钻测井资料正确指导水平井钻进

Using LWD Logs to Guide Horizontal Well Drilling

根据水平井测井机理和对大量水平井、直井测井资料的解释经验,概括出了1套适合较复杂地质条件下的水平井随钻测井综合解释技术,主要包括:水平段进入点识别技术;水平段轨迹近围岩识别技术;水平段钻遇薄、厚泥岩识别技术以及水平段钻出油砂体边界识别技术。使用的随钻测井资料有4条不同探测深度电阻率曲线和1条自然伽马曲线。2000年以来的委内瑞拉M油田76口水平井随钻测井解释结果和完钻后综合解释结果以及新井测试及投产结果对比,解释符合率达到98%以上。

Based on mechanism of horizontal well logging and relative interpretation experience of well logging in both vertical and horizontal well, summarized is a serious of integrated well logging interpretation methods suitable to complex geological situation, including identification method of entry point of horizontal section, method for reorganizing the adjacent stratum in horizontal section, method to identify adjacent clay stratum in horizontal section and method for identifying boundary out of oil sand. LWD logs of 4 resistivities with different investigation depth and a GR are utilized. Since 2000, comparing LWD interpretation to integrated logging interpretation of drilled well and production testing data in 76 horizontal wells of M-oilfield in Venezuela, the interpretation accordant rate has been up to 98%.