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物探与化探  2017, Vol. 41 Issue (6): 1005-1011    DOI: 10.11720/wtyht.2017.6.03
  论文 本期目录 | 过刊浏览 | 高级检索 |
高精度地震探测陆域天然气水合物的有效性研究
高景华1, 2, 刘建勋1, 2, 张保卫1, 2, 王小江1, 2, 徐明才1, 2
1.国家现代地质勘查技术研究中心,河北 廊坊 065000;
2.中国地质科学院 地球物理地球化学勘查研究所,河北 廊坊 065000
A study of the effectiveness of the high precision seismic method in detecting land natural gas hydrate
GAO Jing-Hua1, 2, LIU Jian-Xun1, 2, ZHANG Bao-Wei1, 2, WANG Xiao-Jiang1, 2, XU Ming-Cai1, 2
1.National Modern Geological Exploration Technology Research Center,Langfang 065000,China;
2.Institute of Geophysical and Geochemical Exploration,CAGS,Langfang 065000,China
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摘要 为配合天然气水合物资源勘探工作,2010年在木里地区开展了高精度反射地震方法探测天然气水合物的有效性试验研究。反射地震采用192道接收,道间距2 m,炮间距8 m,覆盖次数24次,每道采用6个60 Hz检波器单点组合接收。激发震源使用炸药,井深为3~4 m,激发药量为1.2~2.4 kg。采用该工作方法得到地震剖面的信噪比和分辨率较高,构造形态特征明显。综合分析解释反射地震和测井及地质资料,推断解释了天然气水合物富集地带,提出了验证孔位。2013年,该探测结果得到了DK9钻孔验证,在距离已发现天然气水合物DK3钻孔SE方向约450 m处发现了厚度较大的天然气水合物。试验研究结果表明:在天然气水合物含量较低的测区,利用地震方法直接探测天然气水合物难度较大,但综合分析测区物化探和地质资料,结合钻井资料,能够通过反射地震探测天然气水合物的富集地带。
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Abstract:In order to cooperate with the exploration of natural gas hydrate resources,the authors conducted the validity of the experimental study of high precision seismic reflection method in Muli area for the detection of natural gas hydrate in 2010.192 receive channels,2 m group spacing,8 m shot spacing,and 24 folds were used in reflection seismic survey.60 Hz geophone string (with 6 geophones) each received channel received seismic wave in the form of point array.Excitation sources were explosives, shot depth was 3~4 m,and shot charge was 1.2~2.4 kg.The seismic sections obtained by the method possessed high S/N ratio and resolution as well as obvious structural form characteristics.On the basis of a comprehensive analysis and interpretation of reflection seismic,well logging and geological data,the enrichment zones of natural gas hydrate were explained and validated borehole location was determined. The detection results were verified by DK9 borehole drilling in 2013.The gas hydrate reservoirs with large thickness were found 450m southwest of DK3 borehole.Experimental results show that it is difficult to detect natural gas hydrate directly by seismic method in the lower gas hydrate content's area,but through a comprehensive analysis of geophysical,geochemical and geological data in combination with drilling data,the enrichment zones of natural gas hydrate can be detected by seismic exploration.
收稿日期: 2017-09-08      出版日期: 2017-12-20
:  P631.4  
基金资助:国家高新技术研究发展计划(“863”计划)课题(2012AA061403)
作者简介: 高景华 (1958-),女,教授级高级工程师,主要从事复杂条件下地震方法技术研究和勘查工作。
引用本文:   
高景华, 刘建勋, 张保卫, 王小江, 徐明才. 高精度地震探测陆域天然气水合物的有效性研究[J]. 物探与化探, 2017, 41(6): 1005-1011.
GAO Jing-Hua, LIU Jian-Xun, ZHANG Bao-Wei, WANG Xiao-Jiang, XU Ming-Cai. A study of the effectiveness of the high precision seismic method in detecting land natural gas hydrate. Geophysical and Geochemical Exploration, 2017, 41(6): 1005-1011.
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https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2017.6.03      或      https://www.wutanyuhuatan.com/CN/Y2017/V41/I6/1005
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