摘要
传统电磁波仪器只能测量地层电阻率,为弥补传统电磁波仪器方位探测能力的不足,研制了随钻方位电磁波成像测井仪。随钻方位电磁波成像测井仪能够探测距离井眼10 m以内的储层边界,为了快速高效地测出边界位置以及计算仪器与边界之间的探边距离,研发了一种在主动地质导向中进行地层边界预测的快速反演算法。快速反演算法的计算速度参考地面数据采集软件所需的最快速度,反演参数的地质约束也内置于反演过程中,采取4个方面的措施来实现计算效率。现场应用表明,快速反演算法可获取轨迹上方和下方的地层电阻率剖面,以及储层的岩性和流体类型信息。快速反演算法能够通过正确映射井筒周围的储层边界,根据倒置的窗帘图和其他测量结果优化钻井轨迹,实现主动的地质导向,满足测井需求。
The traditional electromagnetic wave instrument can only measure the formation resistivity.In order to make up for the lack of azimuth detection ability,an azimuth electromagnetic wave imaging logging instrument while drilling is developed.The MWD azimuth electromagnetic wave imaging logging tool can detect the reservoir boundary within 10 m from the borehole.In order to quickly and efficiently determine the boundary and calculate the edge detection distance between the tool and the boundary,a fast inversion algorithm for predicting the formation boundary in the active geosteering is developed.The calculation speed of the fast inversion algorithm refers to the fastest speed required by the surface data acquisition software,and the geological constraints of inversion parameters are also built into the inversion process.In order to achieve computational efficiency,four measures are taken.Field application shows that the fast inversion algorithm can obtain the formation resistivity profile above and below the track,and obtain the lithology and fluid type information of the reservoir.The fast inversion algorithm can correctly map the reservoir boundary around the wellbore,optimize the drilling trajectory according to the inverted curtain map and other measurement results,achieve active geological guidance,and meet the logging requirements.
作者
陈鹏
王珺
耿尊博
和丽真
杨国华
祝环芬
CHEN Peng;WANG Jun;GENG Zunbo;HE Lizhen;YANG Guohua;ZHU Huanfen;无(Logging Technology Research Institute,China National Logging Corporation,Xi’an,Shaanxi 710077,China;Well Logging Technology Pilot Test Center,China National Petroleum Corporation,Xi’an,Shaanxi 710077,China;Geological Research Institute,China National Logging Corporation,Xi’an,Shaanxi 710077,China)
出处
《测井技术》
CAS
2022年第6期669-675,共7页
Well Logging Technology
基金
中国石油天然气集团有限公司科学研究与技术开发项目“高温高压随钻方位电磁波成像测井技术研究”(2015B-4016)
中国石油天然气集团有限公司科学研究与技术开发项目“高温高压随钻成像测井仪器研制”(2021DJ3902)。
关键词
随钻测井
方位电磁波电阻率成像测井仪
快速反演
边界探测
地质导向
logging while drilling
azimuth electromagnetic wave imaging logging tool
fast inversion
boundary detection
geosteering
作者简介
第一作者:陈鹏,男,1963年生,教授级高级工程师,硕士,从事随钻测导系统研究工作。E-mail:chenp_hb@163.com。
