The effects of methane hydrate dissociation at different temperatures on the stability of porous sediments

被引：69

作者：

Song, Yongchen ^{[1
]}

Zhu, Yiming ^{[1
]}

Liu, Weiguo ^{[1
]}

Li, Yanghui ^{[1
]}

Lu, Yan ^{[1
]}

Shen, Zhitao ^{[1
]}

机构：

[1] Dalian Univ Technol, Minist Educ, Key Lab Ocean Energy Utilizat & Energy Conservat, Dalian 116024, Peoples R China

来源：

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING | 2016年 / 147卷

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金; 中国博士后科学基金;

关键词：

Hydrate dissociation; Methane hydrate-bearing sediments; Stability; Duncan-Chang constitutive model; STRESS-STRAIN BEHAVIOR; GAS HYDRATE; BEARING SEDIMENTS; STRENGTH; STIFFNESS;

D O I：

10.1016/j.petrol.2016.05.009

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Based on a series of triaxial compression tests on methane hydrate-bearing sediments after a hydrate dissociation time of 0 h,1 h, 6 h, 12 h, or 24 h, the mechanical properties of the sediments were studied during hydrate dissociation at different temperatures. The results showed that strain softening behavior appeared at higher temperatures in our work. The failure strength and initial yield strength both decreased with an increase in the methane hydrate dissociation time, and the rate of decline of failure strength was faster at higher temperatures. Mathematical expressions for the failure strength and the initial yield strength in terms of the dissociation time and the temperature were also proposed. Moreover, the Duncan-Chang constitutive model of methane hydrate-bearing sediments considering the influence of temperature and hydrate dissociation time was developed, and the validity of most of the calculated results was verified by experiment. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：77 / 86

页数：10

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