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现代地质 ›› 2010, Vol. 24 ›› Issue (3): 495-500.

• 天然气水合物专辑:地球物理学 • 上一篇    下一篇

波阻抗反演在南海北部神狐海域天然气水合物勘探中的应用

杨睿1,2,3, 吴能友1,2,4, 雷新华3,梁金强4,沙志彬4,苏正1,2   

  1. 1.中国科学院 广州能源研究所 可再生能源与天然气水合物重点实验室,广东 广州510640;2.中国科学院 广州天然气水合物
    研究中心,广东 广州510640;3.中国地质大学 软件学院,北京100083;4.广州海洋地质调查局,广东 广州510075
  • 出版日期:2010-06-21 发布日期:2010-08-17
  • 通讯作者: 吴能友,男,研究员,1965年出生,海洋地质学专业,主要从事海洋地质、天然气水合物、石油天然气资源调查与研究。
  • 作者简介:杨睿,男,研究实习员,硕士,1980年出生,海洋地质学专业,主要从事海洋天然气水合物地震研究。 Email:yangrui@ms.giec.ac.cn。
  • 基金资助:

    国土资源部公益性行业科研专项基金项目(200811014);国家自然科学基金-广东联合基金项目(U0933004);中国科学院知识创新工程重要方向项目(KGCX2-YW-805)。

Impedance Inversion and Its Application in Gas Hydrate Exploration in Shenhu Area, Northern South China Sea

 YANG  Rui1,2,3, WU  Nen-You1,2,4,LEI  Xin-Hua3,LIANG  Jin-qiang4,SHA  Zhi-Bin4,SU  Zheng1,2   

  1. 1.Guangzhou Institute of Energy Conversion Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences,
    Guangzhou,Guangdong510640,China;  2.Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences,
    Guangzhou,Guangdong510640,China;  3.School of Software, China University of Geosciences,Beijing100083,China;
    4.Guangzhou Marine Geological Survey,Guangzhou,Guangdong510075,China
  • Online:2010-06-21 Published:2010-08-17

摘要:

针对神狐海域的地质构造和天然气水合物的赋存特征,以重点测线三维地震数据为基础,分析讨论了基于宽带约束的模拟退火波阻抗反演方法、流程和关键技术问题,定量获得了含天然气水合物沉积物的波阻抗特征。结果表明:基于宽带约束的模拟退火波阻抗反演数据具有较高的有效垂向分辨率和较好的横向连续性;神狐海域高波阻抗异常反映了含天然气水合物沉积层,而不连续异常低波阻抗层是水合物层之下游离气的表现,这与钻探结果吻合。由此可见,基于宽带约束的模拟退火波阻抗反演可为天然气水合物层识别和预测、勘探目标圈定、钻探井位选择提供重要依据。

关键词: 天然气水合物, 波阻抗反演, 神狐海域, 南海北部陆坡

Abstract:

Impedance inversion is one of the means for oilgas reservoir prediction. In view of the complicated geology and formationdistribution features of gas hydrate, based on the 3D seismic data collected by Guangzhou Marine Geological Survey, the method, process and key technology of broadbandbased simulated annealing impedance inversion had been discussed, and the impedance data for the hydratebearing sediments of Shenhu area, Northern South China Sea were revealed in this paper. It is showed that the results of broadbandbased simulated annealing impedance inversion are of high vertical valid resolution and horizontal continuity. The very high impedance layer shows the hydratebearing sediments and relatively lower one corresponds with the free gas in Shenhu area, which coincide with the gas hydrate drilling results. Therefore, the broadbandbased simulated annealing impedance inversion may provide one of basis for gas hydrate recognition and prediction, exploration target confirmation and drilling site selection.

Key words: gas hydrate, impedance inversion, Shenhu area, Northern South China Sea

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