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| THE INTEGRATATION FOR PROCESSING AND INTERPRETATION OF SUB-SALT STRUCTURE IN PRE-CASPIAN BASIN |
| YANG Qin-lin1,2, WANG Yan-chun1, ZHANG Jing2, LIU Wen-qing2, WANG Zhen3 |
1. College of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China;
2. Northwest Branch of Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou 730020, China;
3. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China |
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Abstract There are salt domes of great thickness deposited in Pre-Caspian basin.As the salt layer thickness varies dramatically,it is difficult to perform imagery for the sub-salt seismic data,and the structure features show distortions.The elimination of the salt velocity influence and the restoration of the real sub-salt structure form constitute the urgent problems in oil-gas exploration.Through the integrated study of processing and interpretation,the authors used the floating datum pre-stack time migration method to conduct imagery for high and steep structures based on pre-stack fidelity of the static correction and to make salt amplitude recovery.Finally,the pre-stack reverse-time depth migration method was used for the sub-salt structure accurate imaging and recovery.A technological series of integration of processing and interpretation for sub-salt structure was formed and applied in Pre-Caspian salt basin.
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Received: 15 March 2012
Published: 10 April 2013
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