天然气水合物预测模型及其影响因素

doi:10.3969/j.issn.1673-8926.2010.03.025

Lithologic Reservoirs ›› 2010, Vol. 22 ›› Issue (3): 124-127.doi: 10.3969/j.issn.1673-8926.2010.03.025

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Gas hydrate forecasting model and its influencing factors

LIU Yun¹，LU Yuan¹，YI Xiangyi¹， ZHANG Junliang²， ZHANG Jinliang³，WANG Zhenxi⁴

1. College of Energy Resources， Chengdu University of Technology， Chengdu 610059， China； 2. Northeast Sichuan Gas Field， Southwest Oil & Gasfield Company， Dazhou 635000， China； 3. Chuanqing Geology Institute， Chengdu 610031， China； 4. Changqing Division of PetroChina Logging Company， Xi’an 718500， China

Online:2010-09-15 Published:2010-09-15

Abstract

Abstract:

The generation of hydrate has brought a lot of difficulties in processes such as gas extraction, gas gathering and so on. The establishment of forecasting model is a puzzle in hydrate prevention and cure. The advantages and disadvantages of four commonly used forecasting model are summarized. The statistical thermodynamics principle is used to establish gas hydrate forecasting model, and five main factors that affect gas hydrate formation are analyzed, including the gas composition, temperature and pressure, ion concentration, acidic gas and inhibitor added. This forecasting model is applied in Luojiazhai gas reservoir, and the result shows that the predictive values are consistent with the experimental results. The establishment of gas hydrate forecasting model is significant for hydrate prevention and guiding gas production.

Key words: slope break belt, antecedent slope break, syngenetic slope break, epigenetic slope break, Erlian Basin

LIU Yun，LU Yuan，YI Xiangyi， ZHANG Junliang， ZHANG Jinliang，WANG Zhenxi. Gas hydrate forecasting model and its influencing factors[J].Lithologic Reservoirs, 2010, 22(3): 124-127.

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