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现代地质 ›› 2005, Vol. 19 ›› Issue (1): 108-112.

• 天然气水合物实验研究 • 上一篇    下一篇

天然气水合物开采数值模拟的参数敏感性分析

李淑霞. 陈月明. 杜庆军.   

  1. 中国石油大学 石油工程学院,山东 东营257061
  • 收稿日期:2004-11-30 修回日期:2004-12-31 出版日期:2005-01-20 发布日期:2005-01-20
  • 作者简介:李淑霞,女,副教授,1970出生,油气田开发专业,主要从事油藏数值模拟、天然气水合物的开采机理的研究工作。
  • 基金资助:

    国家“863”计划项目(2004AA616140);国家自然科学基金项目(50404003)

Sensitivity Analysis in Numerical Simulation of Natural Gas Hydrate Production

LI Shu-xia,CHEN Yue-ming,DU Qing-jun   

  1. College of Petroleum Engineering,China University of Petroleum, Dongying, Shandong257061, China
  • Received:2004-11-30 Revised:2004-12-31 Online:2005-01-20 Published:2005-01-20

摘要:

天然气水合物是储量巨大的一种新型能源,如何有效地开采是关键问题。基于降压开采的机理,建立了一维数学模型,利用自编的数值模拟软件进行了天然气水合物开采过程中的参数敏感性分析;通过与Yousif研究结果进行对比,验证了本模型的正确性。在此基础上,分析了渗透率、初始天然气水合物饱和度及生产压力对开采效果的影响。研究发现,渗透率越大、初始饱和度越低、生产压力越低,天然气水合物分解越快,分解前缘的移动速度越快。研究结果对天然气水合物的实际开采提供了理论支持。

关键词: 天然气水合物, 数值模拟, 敏感性分析, 开采

Abstract:

Natural gas hydrate is a newly potentially non-conventional energy resource. How to exploit it is a big problem. A one-dimension,and three-phase(gas, water, and hydrate)model is used to simulate the process of gas production from core samples containing methane hydrate by means of depressurization. Comparison between the simulation results and those of Yousif''s is carried out. In the study, factors such as the permeability,initial saturation of gas hydrates, production pressure, and temperature are taken into account.The results indicate that higher permeability, lower initial hydrate saturation, and smaller production pressure will result in faster decomposition speed of gas hydrates.

Key words: gas hydrate, numerical simulation, sensitivity analysis, production

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