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| High-frequency compensation in seismic data based on system identification of ARX model |
| HU Rui-Qing1,2, XIA Zhen-Hua1,3, GUI Zhi-Xian1,2, SUN Pu2,4 |
1. Key Laboratory of Exploration Technologies for Oil and Gas Resources;Ministry of Education, Yangtze University, Wuhan 430100, China;
2. School of Geophysics and Oil Resources, Yangtze University, Wuhan 430100, China;
3. School of Electronics and Information, Yangtze University, Jinzhou 434023, China;
4. Jiangsu Coal Geophysical Prospecting and Surveying Party, Nanjing 210000, China |
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Abstract Absorptive attenuation has always been one of the reasons for the limited resolution of the seismic data.The mechanism of the absorption in strata,the evaluation of the attenuation quantity and the compensation of the high frequency components are essential in the seismic resolution improvement.Based on ARX model,the authors simulated the reversion of the absorption process in strata by establishing a numerical model with system identification technology.The low frequency data (the surface seismic data) and the high frequency data (the well log data or the cross-well seismic data) are respectively set as the input and the output of the model,and then the structure parameters of the model can be obtained.The model in this paper can establish an interconnection between the conventional seismic data and the well log data,the cross-well data or the VSP data.It is shown by processing the practical data that the main frequency can be increased by 10~15 Hz,and the frequency band width can be expanded by 8~10 Hz.
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Received: 29 April 2014
Published: 10 December 2014
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