气举反循环防漏钻井施工参数适应性分析

发布时间：2018-09-09 18:45

【摘要】：随着西南页岩气开发力度逐渐加大,浅表裂缝性地层漏失问题日益突出,为此尝试引进气举反循环钻井技术。该技术具有井底压力小、上返流速高、携岩效果好等优点,在水井、地热井、煤层气井以及大口径工程桩施工等领域表现出良好的防漏效果。为从理论上探讨气举反循环防漏钻井施工参数的适应性,建立了反循环气液固三相流动模型,初步分析了ф444.5 mm和ф311.2 mm两种井眼条件下双壁钻杆的类型和下深比、空气压缩机风量等施工参数对机械钻速的影响,从施工参数角度验证了该技术在石油钻井领域的适应性。该研究为气举反循环技术在石油钻井领域的应用推广提供了理论依据。
[Abstract]:With the increasing development of shale gas in southwest China, the problem of shallow fractured formation leakage is becoming more and more serious. Therefore, gas lift reverse circulation drilling technology is attempted to be introduced. The technology has the advantages of low bottom pressure, high velocity of upward and back flow, good effect of carrying rock, and so on. It shows good leakage prevention effect in the fields of wells, geothermal wells, coalbed gas wells and construction of large diameter engineering piles. In order to discuss the adaptability of construction parameters of gas lift reverse circulation leakproof drilling in theory, a three-phase flow model of reverse circulation gas-liquid-solid is established, and the type and depth ratio of double-wall drilling pipe under two kinds of borehole conditions, such as 444.5 mm and 311.2 mm, are preliminarily analyzed. The influence of air compressor air flow and other construction parameters on the mechanical drilling speed is verified from the point of view of construction parameters, and the adaptability of the technology in the field of oil drilling is verified. The research provides a theoretical basis for the application of gas lift reverse circulation technology in the field of oil drilling.
【作者单位】：中国石化中原石油工程有限公司钻井工程技术研究院;中国地质大学(北京);中国石化中原石油工程有限公司技术发展处;
【基金】：中国石化石油工程技术服务有限公司项目“气举反循环钻井技术适应性研究”(SG14-06X);中国石化中原石油工程有限公司项目“充气反循环钻井技术应用研究”(2016102)
【分类号】：TE242

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