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Journal of Tropical Oceanography >

2011 , Vol. 30 >Issue 1: 49 - 60

DOI: https://doi.org/10.11978/j.issn.1009-5470.2011.01.049

Marine geophysics

Study of source in 3-D seismic and OBS exploration for marine gas hydrate

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  • Guangzhou Marine Geological Survey Bureau, Guangzhou 510760, China
伍忠良(1967—), 男, 湖南省安乡县人, 高级工程师, 从事海洋地质地球物理勘察研究。E-mail: wzllzw1997@21cn.com

Received date: 2010-03-19

  Revised date: 2010-05-16

  Online published: 2011-03-16

Supported by

国家 “863” 计划重大项目(2006AA09A202,2009AA09A201)

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Abstract

Application of 3-D seismic and OBS exploration has been ever-increasing in the marine survey on natural gas hy-drate. The seismic source is one of determining factors in the acquisition, which is related to the quality of seismic data(P-wave and converted S-wave) acquired. The high quality data help to reveal the feature of velocity anomaly of strata bearing gas hydrate. By taking firing bandwidth, output and bubble effect into integrated consideration, a new type of GI gun point source was designed and then applied in the investigation on gas hydrate. Tests were conducted in northern of the South China Sea repeatedly over time from 2006 to 2009. The results indicated the application of new point source can enhance the penetrating capability of seismic P-wave and can improve the quality of P-wave and converted S-wave that OBS acquired.

Key words： natural gas hydrate; ocean bottom seismometer; GI gun; point source

Cite this article

WU Zhong-liang . Study of source in 3-D seismic and OBS exploration for marine gas hydrate[J]. Journal of Tropical Oceanography, 2011 , 30(1) : 49 -60 . DOI: 10.11978/j.issn.1009-5470.2011.01.049

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