Theoretical Analysis of Gas Hydrate Dissociation in Sediment

被引：1

作者：

Lu, X. B. ^{[1
,3
]}

Lu, L. ^{[2
]}

Zhang, X. H. ^{[1
,3
]}

Wang, S. Y. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Mech, Bei Si Huan Xi Rd 15, Beijing 100190, Peoples R China

[2] China Univ Min & Technol, Sch Sci, Xuzhou, Jiangsu, Peoples R China

[3] Univ Chinese Acad Sci, Dept Engn Sci, Beijing, Peoples R China

来源：

PROCEEDINGS OF GEOSHANGHAI 2018 INTERNATIONAL CONFERENCE: ROCK MECHANICS AND ROCK ENGINEERING | 2018年

关键词：

Gas hydrate; Dissociation; Mathematical model;

D O I：

10.1007/978-981-13-0113-1_13

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Theoretical analysis was carried out to investigate the dissociation of gas hydrate in stiff sediment. First the mathematical model for gas hydrate dissociation was decoupled by asymptotic expansion method considering the order differences of time scales among seepage, dissociation of gas hydrate and heat conduction. The multi-scale perturbation method was used to solve the problem. It is shown that seepage is the fastest process. The heat conduction is the slowest process. With the pressure decreases at the boundary, pressure changes first while no hydrate dissociation and heat conduction occur. Gradually, dissociation causes the decrease of temperature. After a long time, heat can conduct to cause the increase of temperature. Otherwise, the decreased temperature will cause the stop of dissociation if no heat is supplied in time.

引用

页码：109 / 116

页数：8

共 16 条

[1] CLATHRATE HYDRATES [J].

ENGLEZOS, P .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1993, 32 (07) :1251-1274

[2] Gas hydrate reservoirs and gas migration mechanisms in the Terrebonne Basin, Gulf of Mexico [J].

Hillman, Jess I. T. ;

Cook, Ann E. ;

Daigle, Hugh ;

Nole, Michael ;

Malinverno, Alberto ;

Meazell, Kevin ;

Flemings, Peter B. .

MARINE AND PETROLEUM GEOLOGY, 2017, 86 :1357-1373

[3] Natural gas production from hydrate decomposition by depressurization [J].

Ji, C ;

Ahmadi, G ;

Smith, DH .

CHEMICAL ENGINEERING SCIENCE, 2001, 56 (20) :5801-5814

[4] Crack extension induced by dissociation of fracture-hosted methane gas hydrate [J].

Jin, Zhi-He ;

Johnson, Scott E. ;

Cook, Ann E. .

GEOPHYSICAL RESEARCH LETTERS, 2015, 42 (20) :8522-8529

[5] A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption [J].

Liu, Lele ;

Lu, Xiaobing ;

Zhang, Xuhui .

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2015, 133 :589-601

[6]

Lu X., 2010, P 20 INT OFFSH POL E

[7]

Lu X. B, 2009, P 19 INT OFFSH POL E

[8]

Makogon Y., 1997, HYDRATES HYDROCARBON

[9]

Moridis G., 1998, METHANE HYDRATES

[10] HEAT AND MASS-TRANSFER DURING THE DISSOCIATION OF HYDRATES IN POROUS-MEDIA [J].

SELIM, MS ;

SLOAN, ED .

AICHE JOURNAL, 1989, 35 (06) :1049-1052

← 1 2 →