Dynamical mechanism of hydrate formation resulting from free gas migration into seeping seafloor sediments

被引：1

作者：

Wang, Bin ^{[1
,2
,5
]}

Zhao, Jiafei ^{[1
,2
]}

Song, Yongchen ^{[1
,2
]}

Lv, Xin ^{[3
]}

Li, Yuanping ^{[4
]}

Pang, Weixin ^{[3
]}

Li, Qingping ^{[3
]}

机构：

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

[2] Dalian Univ Technol, Sch Energy & Power Engn, Dalian 116024, Peoples R China

[3] CNOOC Res Inst Co Ltd, Beijing 100027, Peoples R China

[4] CNOOC Ltd, Shenzhen Branch, Guangzhou 510240, Guangdong, Peoples R China

[5] Lawrence Berkeley Natl Lab, Earth & Environm Sci Area, Berkeley, CA 94720 USA

来源：

INNOVATIVE SOLUTIONS FOR ENERGY TRANSITIONS | 2019年 / 158卷

基金：

中国国家自然科学基金; 国家自然科学基金重大项目;

关键词：

Hydrate formation; gas migration; seeping seafloor sediments; magnetic resonance imaging; THERMAL-CONDUCTIVITY; STABILITY ZONE; METHANE; STIMULATION;

D O I：

10.1016/j.egypro.2019.01.634

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：

Generating hydrate-bearing samples of nature-approximation in the lab is critically important for evaluating the integrated physical properties of hydrate-bearing sediments, accurately assessing the potential of marine hydrate resources and establishing a safe and efficient gas production technique; however, current database on generating hydrate-bearing samples of nature-approximation in the lab are still limited due to experimental challenges. Here we report the dynamical formation of gas hydrate resulting from free gas migration into seeping seafloor sediments through visual observation using a magnetic resonance imaging (MRI) device. The effects of core temperature, pore pressure, gas flow rate, and solution salinity are preliminarily explored. The saturations of water, gas, and hydrate are calculated based on the mean intensity (M1) of obtained MRI images. The residual water saturation variation along with gas flow direction during hydrate formation are analyzed. Also, the residual water saturation distribution in the pore space are visually presented. (C) 2019 The Authors. Published by Elsevier Ltd.

引用

页码：5329 / 5335

页数：7

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