| 气举反循环钻进井壁稳定及适用性探讨 |
| 投稿时间：2019-08-16 修订日期：2020-06-11 点此下载全文 |
| 引用本文：郑伯乐,郑秀华,段晨阳,等.气举反循环钻进井壁稳定及适用性探讨[J].钻探工程,2020,47(6):13-18.ZHENG Bole,ZHENG Xiuhua,DUAN Chenyang,et al. Discussion on stability and applicability of gas lift reverse circulation drilling[J]. Drilling Engineering, 2020,47(6):13-18. |
| 摘要点击次数: 1145 |
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| 基金项目:国家自然科学基金项目“具有绿色环保自降解特性的地热井碱激发泡沫暂堵水泥的设计及其制备研究”（编号：41572361）、“高温热储环境下微气泡钻井液特性及作用机理研究”（编号：41872184） |
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| 中文摘要:气举反循环工艺具有钻进效率高、携带岩屑能力强、防漏效果好以及钻头寿命长等优点，同时还可以提高流体矿产的产能。但是一般认为气举反循环钻进抽吸作用会产生负压，不利于井壁稳定，不宜在松散地层应用。本文通过计算气举反循环钻进环空水力参数，并从环空压力以及冲洗液流态、流速等方面探讨研究气举反循环钻进中井壁稳定及其适用性，指出通过选取合适的钻具组合以及调节冲洗液性能，可使气举反循环工艺对不同地层的适应性更广。 |
| 中文关键词:气举反循环钻进 井壁稳定 环空压力 冲洗液性能 流态 地层适应性 |
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| Discussion on stability and applicability of gas lift reverse circulation drilling |
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| Abstract:The gas lift reverse circulation process has the advantages of high drilling efficiency, strong cutting carrying capability, good loss prevention effect and long bit life, etc., and can also increase the productivity of liquid minerals. However, it is generally believed that the suction action of gas lift reverse circulation drilling will produce negative pressure, which is not conducive to the stability of the well wall and not suitable for application in loose formations . In this paper, by calculating the hydraulic parameters of the gas lift reverse circulation drilling annulus, and discussing the well wall stability and applicability of gas lift reverse circulation drilling from the aspects of annulus pressure, drilling fluid flow state and flow velocity, it is pointed out that suitable combination of the drilling string and conditioning of drilling fluid properties can make the gas lift reverse circulation process more adaptable to different formations. |
| keywords:gas lift reverse circulation drilling wall stability annular pressure drilling fluid performance flow state formation adaptability |
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