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| A STUDY OF COMBINING AVA INVERSION WITH PP-WAVE DATA AND PS-WAVE DATA |
| ZHANG Feng-qi1, LU Zhan-guo2, LIU Yu-tong3 |
1. Key Laboratory of Earth Exploration and Information Technology, China University of Geosciences, Beijing 100083, China;
2. Beijing Orangelamp Navigation Technology Development Co., Ltd., Beijing 100085, China;
3. Zhongyuan Oil Field Drilling Engineering Technology Institute, Puyang 457001, China |
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Abstract The elastic parameters inverted from PP-wave data couldn't reflect the variation of the lithology and the fluid in pore adequately,which results in large uncertainty in the interpretation of oil reservoir.If the information of PS-wave data is added as the constraint,the interpretation ambiguity could be reduced effectively and the stability of inversion could be improved considerably.The method of the joint inversion presented in this paper uses the theory of GLI(generalized linear inversion) to invert P-wave velocity,S-wave velocity and density iteratively based on the exact Zoeppritz equation.And the precision of S-wave velocity inverted from the joint inversion is improved largely compared with that of inversion by only using PP-wave data.
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Received: 23 November 2011
Published: 10 December 2012
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