近钻头随钻伽马成像系统研制及应用  

Development and application of near-bit gamma-ray imaging system during drilling

作　　者：郑奕挺[1,2,3] 方方 吴金平[2,3] 李继博 张卫[2,3] ZHENG Yiting;FANG Fang;WU Jinping;LI Jibo;ZHANG Wei(School of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu,Sichuan 610059,China;State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing 100101,China;Research Institute of Petroleum Engineering,SINOPEC,Beijing 100101,China)

机构地区：[1]成都理工大学核技术与自动化工程学院,四川成都610059 [2]页岩油气富集机理与有效开发国家重点实验室,北京100101 [3]中国石化石油工程技术研究院,北京100101

出　　处：《东北石油大学学报》2020年第3期70-76,126,I0005,共9页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2016ZX05021-002);中国石油化工股份有限公司科技攻关项目(P15019);中国石油化工股份有限公司科技攻关项目(P18001-7)。

摘　　要：为解决常规地质导向系统测量盲区大、地层响应滞后等问题,采用方位伽马成像测井和无线电磁波通讯一体化设计,研制近钻头随钻伽马成像系统。该系统集成近钻头伽马成像探测短节、井下无线电磁波短传子系统和地面实时成像导向软件等,具有测量零长短、方位成像精度高、无线电磁波传输距离远等特点。现场应用结果表明:在保证测量、施工工艺等稳定性前提下,近钻头随钻伽马成像系统可以实时获取钻头附近的地层方位伽马成像图,实现跨螺杆动力钻具无线电磁波通讯。该结果可为定向井、水平井勘探开发提供技术支持。To address the problem of large measuring blind zone,and formation response delay of conventional geosteering system,gamma-ray imaging system during drilling was developed using integration design of azimuthal gamma-ray imaging logging and wireless electromagnetic wave communication.This system consists of gamma-ray imaging detection tool subs,downhole wireless electromagnetic wave shot-hop telemetry subsystem,and surface real-time imaging steering software.Additionally,this system has the characteristics of short measuring zero length,high azimuthal imaging precision,and large wireless shot-up telemetry distance.Field example shows that this system can acquire real-time azimuthal gamma-ray image,and transmit the data across the displacement mud motor with wireless electromagnetic wave short-hop communication with the understanding of stable measurement and construction techniques,which allows for the reservoir exploration and development via directional and horizontal wells.

关 键 词：近钻头成像 随钻测井 地质导向 无线短传 方位伽马 工具面检测 

分 类 号：P631.8[天文地球—地质矿产勘探]