气举反循环防漏钻井施工参数适应性分析

Adaptability of air-lifting reverse circulation caulk drilling with different parameters

 李帮民¹ 侯树刚¹ 杨甘生² 张建华³ 王惠文¹ 龚媛¹

中国石化中原石油工程有限公司钻井工程技术研究院，河南 濮阳 457001 中国地质大学（北京），北京 100083 中国石化中原石油工程有限公司技术发展处，河南 濮阳 457001）

Research Institute of Drilling Engineering and Technology, Zhongyuan Petroleum Engineering Co. Ltd., SINOPEC, Puyang 457001, China China University of Geosciences, Beijing 100083, China Technology Development Department, Zhongyuan Petroleum Engineering Co. Ltd., SINOPEC, Puyang 457001, China)

 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Φ444.5 mm和Φ311.2 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。

 with the development of shale gas in the southwest China, fractured leakage of shallow formation becomes increasingly severe. Air-lifting reverse circulation drilling technology, which has a lot of advantages, such as low bottom hole pressure, high return velocity and better cutting clean, shows good leak proof effect in the process of wide application. In order to study the adaptability of air-lifting reverse circulation drilling with different parameters, three phase flow model of air-lifting reverse circulation is established. The impact on the rate of penetration with different parameters, including the type of double-wall drill pipe, depth, air compressor discharge rate, in both 444.5 mm and 311.2 mm wellbores is preliminarily analyzed. The verified adaptability of air-lifting reverse circulation drilling technology provides a theoretical basis for the application and extension of this technology in the oil drilling.

10.6056/dkyqt201606032