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泥页岩井壁稳定性研究一直是国内外钻井界是十分关注而未能很好解决的工程难题,也是目前制约我国油气田勘探开发速度的重要因素之一,因此研究泥页岩压力传递有助于认识泥页岩井壁失稳的机理,也有助于设计新的防塌钻井液体系以及顺利的完成泥浆到气体钻井和空气钻井到泥浆钻井的转换,从而更好地解决泥页岩井段井壁失稳问题。本论文的主要目的是对泥页岩井壁稳定性进行分析研究;了解气体钻井泥浆转换过程的井壁失稳原因;实验和分析工作液在泥页岩中传递规律。
The research on the stability of shale borehole has always been one of the most important problems that the drilling community is paying close attention to but not solved very well. It is also one of the most important factors restricting the exploration and development of oil and gas fields in China at present. Therefore, studying the pressure transmission in shale helps Understanding the mechanism of shale well wall instability also helps to design a new anti-collapse drilling fluid system and smoothly convert the mud-to-gas drilling and air drilling to mud drilling to better solve the loss of shaft lining in the shale section Steady problems. The main purpose of this paper is to analyze the stability of shale borehole; to understand the reasons of borehole instability in the process of gas drilling mud conversion; to test and analyze the transmission law of working fluid in shale.