WANG Xiu-juan, WU Shi-guo, DONG Dong-dong, GONG Yue-hua, CHAI Chao. CHARACTERISTICS OF GAS CHIMNEY AND ITS RELATIONSHIP TO GAS HYDRATE IN QIONGDONGNAN BASIN[J]. Marine Geology & Quaternary Geology, 2008, 28(3): 103-108.
Citation: WANG Xiu-juan, WU Shi-guo, DONG Dong-dong, GONG Yue-hua, CHAI Chao. CHARACTERISTICS OF GAS CHIMNEY AND ITS RELATIONSHIP TO GAS HYDRATE IN QIONGDONGNAN BASIN[J]. Marine Geology & Quaternary Geology, 2008, 28(3): 103-108.
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CHARACTERISTICS OF GAS CHIMNEY AND ITS RELATIONSHIP TO GAS HYDRATE IN QIONGDONGNAN BASIN

  • 1 Institute of Oceanology, the Chinese Academy of Sciences, Qingdao 266071, China;

  • 2 Graduate School, Chinese Academy of Sciences, Beijing 100039, China;

  • 3 Guangzhou Marine Geological Survey, MLR, Guangzhou 510760, China;

  • 4 The College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China

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  • Received Date: December 29, 2007
  • Revised Date: April 22, 2008
    Graphical Abstract
    • Abstract
  • Gas chimney is one of seismic anomalies resulting from vertical gas or fluid migration. It is formed by the combined action of overpressure, low stress and mud shale sealed reservoir. During the formation of gas chimney, large scale methane-rich fluid migrates into gas hydrate stability zone along with it. After it is formed, gas chimney is still a special migration pathway to the later action of fluid and petroleum. Gas chimney is the main pathway for gas migration in Qiongdongnan basin after middle Miocene. Many gas chimneys were found in the distribution zone of bottom simulating reflector (BSR) identified from seismic data. The characteristics of gas chimney are biogenetic mud diapirs by analyzing the parameters of interval velocity, fluid potential,mud content and well data.
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