基于随钻测井的地层界面识别方法  

Methods to Identify Formation Boundary Based on Logging-While-Drilling

作　　者：唐海全[1] 肖红兵[1] 李翠[1] 杨震[1] 

机构地区：[1]中国石化胜利石油工程有限公司钻井工艺研究院

出　　处：《天然气勘探与开发》2016年第4期8-12,共5页Natural Gas Exploration and Development

基　　金：国家重点研发计划"大直径随钻测井系统装备研制与示范作业"(编号:2016YFC0302800);国家科技重大专项"低渗透油气田高效开发钻完井技术"(编号:2016ZX05021)

摘　　要：随钻测井资料特别是随钻方位性测井资料在地质导向钻井中起着至关重要的作用,可以预测和判断地层界面、地层方位特征以及各向异性地层走向。通过介绍随钻电磁波电阻率仪器、方位深探测电磁波电阻率仪器和方位伽马仪器的基本结构及测量原理,结合实际应用环境,分析测量仪器在穿越地层界面时的影响因素和边界效应,进而提出利用电磁波电阻率和方位伽马曲线响应特征实现地层界面识别的方法,最后举例说明了随钻电磁波电阻率和伽马成像仪器在地层界面识别中的应用。现场应用表明,研究开发的具有边界探测能力的地质导向技术和装备,优化了井眼轨迹在储层中的位置,降低了打穿油层的风险,提高了储层钻遇率。Logging-while-drilling data, especially logging-while-drilling azimuth data,which plays an important role in geosteering drilling, can be used to predict and judge formation boundary and azimuth, and strike of anistropic formation. In this paper, the basic structure and principle of three instruments are presented, containing logging-while-drilling electromagneticwave resistivity, logging-while-drilling azimuth detecting electromagnetic-wave resistivity, and logging-while-drilling azimuth gammy-ray. Furthermore, both influencing factors and boundary effect while these instruments pass through formation boundary are analyzed, and methods are developed to identify formation boundary by using response features of both electromagnetic-wave resistivity and azimuth gammy-ray curves. In addition, the application of logging-while-drilling electromagnetic-wave resistivity and gammy-ray imaging instruments to identifying formation boundary is also demonstrated. Results show that these two instruments detecting formation boundary can optimize the location of wellbore trajectory, decrease the risk of penetrating oil layers, and increase the drilling rate.

关 键 词：随钻测井 测井仪器 电磁波电阻率 方位伽马 储层 界面识别 地质导向 

分 类 号：TE271[石油与天然气工程—油气井工程]