Volume 37 Issue S1
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Article Navigation >  Earth Science  > 2012  >  37(S1): 195-202
XU Hua-ning, XING Tao, WANG Jia-sheng, LI Li-qing, LIANG Bei-wen, SHU Hu, ZHANG Ming, 2012. Detecting Seepage Hydrate Reservoir Using Multi-Channel Seismic Reflecting Data in Shenhu Area. Earth Science, 37(S1): 195-202. doi: 10.3799/dqkx.2012.S1.020
Citation: XU Hua-ning, XING Tao, WANG Jia-sheng, LI Li-qing, LIANG Bei-wen, SHU Hu, ZHANG Ming, 2012. Detecting Seepage Hydrate Reservoir Using Multi-Channel Seismic Reflecting Data in Shenhu Area. Earth Science, 37(S1): 195-202. doi: 10.3799/dqkx.2012.S1.020
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Detecting Seepage Hydrate Reservoir Using Multi-Channel Seismic Reflecting Data in Shenhu Area

doi: 10.3799/dqkx.2012.S1.020
  • 1.

    State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China

  • 2.

    Guangzhou Marine Geological Survey, Guangzhou 510075, China

  • Received Date: 2011-11-25
    Available Online: 2021-11-15
  • Publish Date: 2012-05-01
    Abstract
  • Taking the seafloor as datum, the high resolution seismic reflecting data acquired in Shenhu area are divided into two parts for the imaging of water column and strata respectively. Two apparent echoes shaped like plume show in the water column and the particular geomorphology such as vents and depressions of seafloor suggests the existence of the gas seepage occurred opposite them on the seismic reflecting section. Moreover, a classical bottom simulating reflector which indicates the presence of gas hydrates appears at the depth less than 100 m. The detailed velocity field reveals that acoustic velocity of sediments decreases beneath both the seep sites and bottom simulating reflector and the seismic reflecting characteristics seem to be related to the gas-bearing of strata. It can be concluded that geophysical anomalies (plumes, acoustic velocity reverse, BSR (bottom simulating reflector)) and the expressions of particular geomorphology of seabed (vents and depressions or craters) should have been resulted from the migration of free gas into the sediments of subsurface and then the formation of gas hydrates or the direct seepage into the seawater. This study indicates that high resolution multi-channel seismic reflecting data has great potential for characterizing the anomalies and then detecting the seepage gas hydrates reservoir.

     

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