方位侧向电阻率成像随钻测井仪探测特性数值模拟分析  

Numerical Analysis of Logging Responses for LWD Azimuthal Laterolog Resistivity Imaging Tool

作　　者：李安宗 李启明 朱军 孔亚娟 周强 李传伟 

机构地区：[1]中国石油集团测井有限公司随钻测井中心,陕西西安710054 [2]美国Oliden技术有限公司,美国德克萨斯77478

出　　处：《测井技术》2014年第4期407-410,共4页Well Logging Technology

基　　金：国家油气重大专项课题"地层评价随钻测井技术与装备"(2011ZX05020-002);中国石油天然气集团公司国际合作课题"随钻电阻率成像关键技术研究"(2011B-4008)资助

摘　　要：研发一种方位侧向电阻率成像随钻测井仪,已进入现场试验。该仪器可用于大斜度井/水平井地质导向、地层评价和电阻率井壁成像。介绍了该仪器的电极系排列和测量原理,通过二维和三维有限元数值模拟计算,分析了该仪器测井响应的探测深度、地层边界探测能力、轴向分辨率、井眼影响等探测特性。数值模拟结果表明,与同类仪器相比较,该仪器具有更大的探测深度、良好的分层能力、较小的井眼影响,地层界面探测距离可达1m以上。A new Logging While Drilling （LWD） azimuthal laterolog Resistivity Imaging Tool （RIT） has been developed and has begun to be tested in China＇s oilfields.RIT can be used for geosteering,formation evaluation and resistivity wellbore imaging during drilling high angle and horizontal wells.This paper presents the RIT＇s basic measurement principle and the log responses to borehole,invasion,bed boundary and proximity beds in vertical/horizontal wells,through 2-D and 3-D numerical modeling.The vertical resolution,and depth of investigation （DoI） and distance-to-bed-boundary （DTB） detection capability are characterized.The results show that RIT has a relatively deep DoI,good axial resolution,and reasonable borehole effect in while drilling environment,and potential DTB capability over 1 m.

关 键 词：随钻电阻率测井 方位侧向电阻率 探测深度 边界探测距离 纵向分辨率 井眼影响 

分 类 号：P631.83[天文地球—地质矿产勘探]