| Experimental Research of Gas Hydrate Drilling Fluids Using Polyethylene Glycol as an Inhibitor |
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| 作者姓名： | 张凌 蒋国盛 涂运中 蔡记华 窦斌 张家铭 宁伏龙 |
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| 作者单位： | Faculty of Engineering China University of Geosciences，Faculty of Engineering China University of Geosciences，Faculty of Engineering China University of Geosciences，Faculty of Engineering China University of Geosciences，Faculty of Engineering China University of Geosciences，Faculty of Engineering China University of Geosciences，Faculty of Engineering China University of Geosciences，Wuhan 430074 China，Wuhan 430074 China，Wuhan 430074 China，Wuhan 430074 China，Wuhan 430074 China，Wuhan 430074 China，Wuhan 430074 China |
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| 基金项目： | This paper is supported by the National Natural Science Foundation of China (No .50504012) ,the New Century Excellent Talent Supporting Program of Ministry of Education of China , China Postdoctoral ScienceFoundation (No .2005037681) and the Excellent Young Teachers Spon-sored Program of CUG(No . CUGQNL0623) . |
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| 摘 要： | INTRODUCTION Gas hydrate is anice-like crystal compound gen-erally formed by water and natural gas molecules ,whichis mainly distributed under the oceanfloor andin the permafrost andis viewed as an energy resourcewith great potential (Jiang et al .,2002) .For the rel-ative exploration and development of gas hydrate inChina ,some specialists and scholars have suggestedthat relative test drilling exploitation should be donein the permafrost (Liu,2005 ; Li and Geng,2000) .Drillingin the per…
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| 关 键 词： | 钻探泥浆 天然气 水合物 聚乙烯 地质条件 |
| 收稿时间： | 2006-03-22 |
| 修稿时间： | 2006-06-25 |
Experimental Research of Gas Hydrate Drilling Fluids Using Polyethylene Glycol as an Inhibitor |
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| Zhang Ling,Jiang Guosheng,Tu Yunzhong,Cai Jihua,Dou Bin,Zhang Jiaming,Ning Fulong.Experimental Research of Gas Hydrate Drilling Fluids Using Polyethylene Glycol as an Inhibitor[J].Journal of China University of Geosciences,2006,17(3):276-282. |
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| Authors: | Zhang Ling Jiang Guosheng Tu Yunzhong Cai Jihua Dou Bin Zhang Jiaming Ning Fulong |
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| Institution: | Faculty of Engineering,China University of Geosciences,Wuhan 430074,China |
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| Abstract: | Low temperature is the key for maintaining the wellbore stability of the gas hydrate well and for ensuring the safety in the well. In this article, the characteristics of drilling in the permafrost containing gas hydrates are analyzed initially. And later, the relative properties and the inhibitory mechanisms of the polyethylene glycol and the hydrate inhibitor of the drilling fluids ensuring drilling safety are discussed. On the basis of these, the effects of the molecular weight and the content of the polyethylene glycol, and its interaction with the salts on the performances of the four groups of drilling fluids under low temperature are mainly analyzed. The results of these analyses show that for the relative drilling fluid system, the 5% content of polyethylene glycol with a molecular weight of 10 000 combined with 15% NaCl 5% KCl or 20% NaCl is suitable. |
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| Keywords: | drilling fluids gas hydrate polyethylene glycol inhibitor |
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