水平井地质导向录井关键技术  

Key surface logging technologies in horizontal geosteering drilling

作　　者：李一超[1] 王志战[2] 秦黎明[2] 徐洪泽[3] 

机构地区：[1]中国石化石油工程管理部 [2]中国石化石油工程技术研究院测录井研究所 [3]中国石化胜利石油管理局地质录井公司

出　　处：《石油勘探与开发》2012年第5期620-625,共6页Petroleum Exploration and Development

基　　金：国家自然科学基金"构造应变与砂岩成岩的构造非均质性特征"(41002034)

摘　　要：水平井钻进过程中,录井的核心任务是利用随钻过程中获得的岩性、电性、物性及含油气性资料进行地质导向。水平井地质导向录井包括两项关键技术:一是进入目的层前的地层对比和预测技术;二是进入目的层后的地质解释与导向技术。通过对这两项技术难点的系统分析,结合应用实例,深入分析了在目的层设计深度不准确的情况下,通过录井精细对比及时修正模型、保证准确进入水平段开采目的层的技术;水平段钻遇非目的层岩性情况下(井眼偏离正确轨迹、目的层沉积相变化、钻遇断层、钻遇泥岩夹层等),可利用随钻测井资料、井区资料、地震剖面等进行精确解释,提出钻头前进方向,保证油气层钻遇率和井身质量。In the drilling of horizontal wells, the core task of surface logging is to guide geosteering while drilling by using collected data including electrical property, lithology, petrophysics, and oil/gas-bearing properties. Surface logging in the horizontal geosteering drilling have two key technologies： one is stratigraphic correlation and prediction technology before encountering the zone of interest, the other one is geological interpretation and geosteering technology after encountering the zone of interest. Based on a systematic analysis of difficult points in the two aspects, in combination with application examples, this paper deeply analyzes how to accurately drill into horizontal section by in-depth stratigraphic correlation and timely model modification in the case of inaccurate horizon depth design; and how to improve drilling-encounter ratio of oil layer and well bore quality by accurate interpretation and guidance in the case of encountering non-target zone （e.g., borehole deviates from right track, sedimentary facies changes in the target zone, faults or mudstone interlayers are encountered.）.

关 键 词：水平井 地质导向 录井 地层对比与预测 地质解释 

分 类 号：TE122[石油与天然气工程—油气勘探]