Geologic Controls on Permafrost-Associated Gas Hydrate Occurrence in the Mackenzie Delta

LIU Jie; SUN Mei-jing; YANG Rui; SU Ming; YANG Chu-peng

doi:10.3969/j.issn.2095-560X.2018.01.008

Advances in New and Renewable Energy >

2018 , Vol. 6 >Issue 1: 47 - 54

DOI: https://doi.org/10.3969/j.issn.2095-560X.2018.01.008

Geologic Controls on Permafrost-Associated Gas Hydrate Occurrence in the Mackenzie Delta

LIU Jie ,
SUN Mei-jing ,
YANG Rui ,
SU Ming ,
YANG Chu-peng

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1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;
2. CAS Key Laboratory of Gas Hydrate, Guangzhou 510640, China;
3. Guangzhou Marine Geological Survey, Guangzhou 510750, China;
4. School of marine sciences, Sun Yat-sen University, Guangzhou 510640, China

Received date: 2017-06-20

Revised date: 2017-12-26

Online published: 2018-02-28

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Abstract

The stable condition, distribution and hydrocarbon accumulation characteristics of natural gas hydrate in the Mackenzie Delta area were systemically summarized. The structural condition, sedimentary condition and hydrodynamic field play important roles in the enrichment process of gas hydrate. Permafrost-associated gas hydrate shows characteristics as follows: heterogeneous distribution, gas source from thermogenic gas and coexistence with conventional oil resources in the Mackenzie Delta. Under conditions of temperature and pressure are considered to be uniformed in the bottom of permafrost, the gas hydrate occurrence in the study area is principally controlled by regional main faults, which can offer fluid channel for deep gas source. Coarse clastic sediment can supply favorable storage space, and is a favorable place for the enrichment of high saturation hydrate. Moreover, the permafrost plays a sealing role in hydrate accumulation, good reservoir-cap assemblages are favorable for hydrate accumulation. Besides, the deep overpressure fluid system and shallow gravity flow system are also important factors that influence the migration of natural gas and the occurrence and distribution of hydrate in this area.

Key words： Mackenzie permafrost; gas hydrate; heterogeneity; coexistence relationship; controlling factor

Cite this article

LIU Jie , SUN Mei-jing , YANG Rui , SU Ming , YANG Chu-peng . Geologic Controls on Permafrost-Associated Gas Hydrate Occurrence in the Mackenzie Delta[J]. Advances in New and Renewable Energy, 2018 , 6(1) : 47 -54 . DOI: 10.3969/j.issn.2095-560X.2018.01.008

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