Analysis on current status and key technology of miniaturization design of near-bit MWD systems
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摘要: 近钻头随钻测量技术是石油钻井领域最具有发展前景的高新技术之一,它以近钻头地质参数与工程参数的随钻测量、传输、信息解释、决策控制为主要技术特征,能有效提高油气层钻遇率、降低钻井成本。本文介绍了近钻头测量系统国内外的发展与应用现状,阐述了系统的工作原理、结构组成与特点,为满足小口径钻进对近钻头测量技术的需求,提出了小型化设计亟待攻克的关键技术难题,包括电磁波无线通信抗干扰技术、小直径涡轮发电技术、井下MEMS传感器技术等,为今后小直径近钻头测量系统研发提供技术基础。Abstract: Near-bit MWD technology is one of the most promising new technologies in the field of petroleum drilling. It is characterized by near-bit geological and engineering parameter measurement while drilling, transmission, data interpretation and decision control, which can effectively improve the oil and gas zone intersection rate and reduce drilling cost. In this paper, the development and application status of near-bit measurement systems at home and abroad are introduced, and the working principle, structure composition and characteristics of the system are described. In order to meet the demand of small diameter drilling for near-bit measurement technology, the key technical problems to be solved in miniaturization design are put forward. They includes electromagnetic wave wireless communication anti-interference technology, small-diameter turbine power generation technology, downhole MEMS sensor technology, near-bit measurement data interpretation technology, etc, which provides technical basis for the research and development of small diameter near-bit measurement systems in the future.
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