Research on 3D marine electromagnetic interferometry with synthetic sources for suppressing the airwave interference |
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| Authors: | Jian-Guo Zhang Xin Wu You-Zheng Qi Ling Huang Guang-You Fang |
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| Institution: | 1. Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing, 100190, China
2. University of Chinese Academy of Sciences, Beijing, 100039, China
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| Abstract: | In order to suppress the airwave noise in marine controlled-source electromagnetic (CSEM) data, we propose a 3D deconvolution (3DD) interferometry method with a synthetic aperture source and obtain the relative anomaly coefficient (RAC) of the EM field reflection responses to show the degree for suppressing the airwave. We analyze the potential of the proposed method for suppressing the airwave, and compare the proposed method with traditional methods in their effectiveness. A method to select synthetic source length is derived and the effect of the water depth on RAC is examined via numerical simulations. The results suggest that 3DD interferometry method with a synthetic source can effectively suppress the airwave and enhance the potential of marine CSEM to hydrocarbon exploration. |
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| Keywords: | marine CSEM reflection response airwave synthetic aperture method 3D deconvolution interferometry up- and down-going field decomposition |
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