国内外井下电驱动流量控制技术研究进展

Research Progress in Downhole Electric Flow Control Technology in China and Abroad

电驱动流量控制技术是智能完井中信号传输速度最快、控制管线最简单的控制技术,该技术在控制流量的大小、稳定开采进度方面上起到重要作用。在调研国外相关技术的基础上,分析了我国电驱动流量控制技术的研究现状,介绍了中石油集团的电控智能配产器,中海油集团智能分注分采技术的井下电控滑套,以及中石化集团的井下电控变流量控制阀。指出了国内外电驱动流量控制技术普遍存在的问题,即井下流量控制阀中的驱动电机和相关仪器的耐温、耐压问题。针对该技术提出了发展建议:进一步提升驱动电机和仪器的耐温、耐压性能研究;对井下流量控制阀的结构和电机安装位置以及相应的密封装置进行优化设计;在对井下流量控制技术研究的同时,需要推进地面控制系统、井下电路、信号采集与传输系统、数据的监测与反馈系统以及测试装置的研究。所得结论可为井下电驱动流量控制技术的进一步研究提供借鉴和指导。

Electric flow control technology is a control technology with the fastest signal transmission speed and simplest control line in intelligent well completion,and plays an important role in controlling the flow rate and stabilizing the progress of exploitation.On the basis of investigating foreign related technologies,the research status of electric flow control technology in China was analyzed,and the electric intelligent bottom-hole regulator of CNPC,the downhole electric sliding sleeve of intelligent separate zone injection and production technology of CNOOC,and the downhole electric variable flow control valve of Sinopec were introduced.Then,the problems of electric flow control technology universally presented at home and abroad were pointed out,i.e.,the temperature and pressure resistance of drive motor and related instruments in the downhole flow control valve.Finally,development suggestions were proposed for this technology:further strengthen the research on improving the temperature and pressure resistance performance of drive motor and related instruments;conduct optimization design on the structure of downhole flow control valve,the installation position of motor and the corresponding sealing devices;at the same time of studying the downhole flow control technology,promote the research on surface control system,downhole circuit,signal acquisition and transmission system,data monitoring and feedback system and testing devices.The conclusions provide reference and guidance for the further research on downhole electric flow control technology.