西南石油大学学报(自然科学版)

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Gas Sources Condition of Gas Hydrate Formation in
Shenhu Deep Water Sea Zone

Su Pibo1,2, Liang Jinqiang1,2, Sha Zhibin1,2, Fu Shaoying1,2   

  1. 1. Guangzhou Marine Geological Survey,Guangzhou,Guangdong 510760,China
    2. Key Laboratory of Marine Mineral Resources,Ministry of Land and Resources,Guangzhou,Guangdong 510075,China
  • Online:2014-04-01 Published:2014-04-01

Abstract:

To further study the gas source controlling factors of gas hydrate formation in Shenhu deep water zone of the northern
in South China Sea,this paper focuses on the survey area of hydrate in Shenhu area,and analyzes the influence of various gas
source supply conditions by the basic survey data and results of drilling in the area. The main results are as follows:(1)in
the shallow area,about 400~1 200 m under the seabed,there are good conditions for biogenic gas formation and the potential
Bio-gas source rocks,and it has great potential for the production of the biogenic methane gas;(2)in the deep area,the early
Tertiary area,Wenchang Formation and Enping Formation are two main source rocks and can provide some thermogenic gas for
gas hydrate formation;(3)Gas hydrate reservoir was formed in the deep areas,where deep thermogenic gas migrates upwards
to shallow ground by faults or diapers,then,biogenic gas and thermogenic gas were enriched in the stability region of hydrate
by lateral migration.

Key words: deep water zone of the northern in South China Sea, biogenic gas, thermogenic gas, mixture gas source, gas
hydrate formation