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| A high order optimized traveltime algorithm and its applications in seismic imaging |
| Wang Jianli1, Fang Zhengmao2, Yang Changchun2, Wang Yanchun1, Liu Wenlei3, Zhen Hongmei4 |
1. China University of Geosciences(Beijing),Beijing 100083,China;
2. Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;
3. Petroleum Geophysical Exploration School,BGP Inc.,CNPC,Zhuozhou,Hebei 072751,China;
4. Development and Production Seismic Division,BGP Inc.,CNPC,Zhuozhou,Hebei 072751,China |
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Abstract Based on the Snell's law,we propose in this paper a new algorithm to calculate the seismic traveltimes using the higher order optimum Taylor seires.A numerical example shows that this method has higher accuracy in calculating the traveltimes both in the positive and negative gradient velocity models than the conventional method.We use this method for prestack time migration of seismic data acquired in the complicated mountain area of the Northeast Sichuan and obtain the agreeable results.
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Received: 29 April 2011
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2012, Vol. 47 
