1. Faculty of Resources,China University of Geosciences(Wuhan),Wuhan 430074,China 2. Guangzhou Marine Geological Survey,Guangzhou 510075,China 3. College of Geoscience and Surveying Engineering,China University of Mining & Technology(Beijing),Beijing 100083,China 4. Beijing Yubo Innovation Geophysics Technology Co.,Ltd.,Beijing 102200,China
Weak BSR or no BSR is developed in western Pearl River Mouth basin.The conventional post-stack inversion obtains only one parameter,and it is difficult to accurately predict the gas hydrates distribution characteristics.Based on seismic gather optimization,fine velocity analysis,petrophysical analysis and accurate establishment of low-frequency models,the authors used pre-stack simultaneous inversion technology to predict gas hydrate reservoirs in western Pearl River Mouth basin,adopted facies and fluid probabilities analysis technology to comprehensively identify the gas hydrate reservoirs in the study area,and achieved a fine characterization of the gas hydrates.The inversion prediction results show that the gas hydrates are developed well in the study area,and the prediction results are consistent with the drilling results,implying that the application effect of pre-stack simultaneous inversion technology is ideal.
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