摘要
在建设地下储气库时,首先应确保储气库的密封性,要确定废弃掩埋老井的位置并对其进行封堵,常见测量手段存在一定的误差和不确定性。为此提出一种掩埋井口精确磁定位技术,通过主动激发掩埋井口周围的磁场分布特征,结合反向散射信号提取解算,实现精确测量和定位。硬件系统主要由发射器、接收器和计算装置组成,采用信号提取、坐标转换、平面定位、垂向定位等定位算法可以锁定被埋井口位置,同时从算法方面分析了绞车、回路、发射器等可能会对磁定位结果产生的干扰。该技术应用于辽河油田国家级自然保护区的桥下S井定位作业中,共钻进4口浅井,交替测量2次后成功锁定S井井口位置,随后一次开挖成功,与测量坐标的误差小于0.5 m。该技术解决了长期困扰油田的储气库无法顺利建库的难题,为掩埋井口精确定位提供了可靠思路,具有指导意义。
In construction of underground gas storage facilities,it is essential to ensure the sealing performance of the gas storages.When determining the location of abandoned and buried old wells for sealing,there exist certain errors and uncertainties with the common surveying methods.A precise magnetic positioning technology for buried wellheads was proposed.In conjunction with back-scattering signal survey technology,precise survey and positioning of buried wellheads can be achieved by actively exciting the magnetic field distribution characteristics around the buried wellheads.The system mainly consists of launcher,receiver and computing unit.By using positioning algorithms such as signal extraction,coordinate transformation,plane positioning and vertical positioning,the buried wellheads position can be determined.Meanwhile,potential interferences on magnetic positioning effect by winches,circuits and transmitters,etc.were analyzed.This technology was applied in the positioning operation of Well Qiaoxia S in national natural reserve in Liaohe Oilfield,where a total of four wells were drilled.After alternately surveying twice,the wellhead position of Well S was successfully locked,followed by successful excavation with an error less than 0.5 meters compared to the surveyed coordinates.The magnetic positioning technology solves the problem that has long plagued oil fields in the smooth construction of gas storages,and provides a reliable solution for the precise positioning of buried wellheads,which is of guiding significance.
作者
车阳
方明星
贺梦琦
王辰龙
黄洋
王开龙
CHE Yang;FANG Mingxing;HE Mengqi;WANG Chenlong;HUANG Yang;WANG Kailong(Research Office of Unconventional Oil&Gas Engineering,CNPC Engineering Technology R&D Co.,Ltd,Beijing 102206,China;National Engineering Research Center for Oil&Gas Drilling and Completion Technology,Beijing 102206,China;College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China;Gas Storage Company,PetroChina Liaohe Oilfield Company,Panjin 124000,Liaoning,China;School of Electrical&Information Engineering,Northeast Petroleum University,Daqing 163319,Heilongjiang,China)
出处
《石油钻采工艺》
CAS
北大核心
2024年第1期60-66,118,共8页
Oil Drilling & Production Technology
基金
中国石油天然气集团有限公司科技项目“无源磁导向救援井关键技术及配套工具研制”(编号:2021DJ6506)
中国石油集团工程技术研究院有限公司科技项目“无源磁导向仿真模拟实验系统研制”(编号:CPET2022-11S)。
关键词
储气库
掩埋井口
磁定位技术
反向散射信号
精确测量
underground gas storage
buried wellhead
magnetic positioning technology
back-scattering signal
precise survey
