A novel approach for interval inelastic absorption factor estimation
Cai Hanpeng1,2, He Zhenhua2, Wang Meng3, Li Yalin3, He Guangming3, Zou Wen3
1. School of Resources and Environment, University of Electronic Science and Technology, Chengdu, Sichuan 611731, China;
2. complex Oil & Gas Reservoir Geophysics Institute, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
3. Geophysical Exploration company, Chuanqing Drilling Engineering Co. Ltd., CNPC, Chengdu, Sichuan 610213, China
Abstract：To overcome estimation error of interval inelastic absorption factor (IIAF) caused by amplitude spectrum logarithmics using conventional spectral-ratio method, a novel approach for robust IIAF estimation is put forward in this paper from near-offset stack seismic data. Based on high-precision time-frequency analysis and fast simulated annealing, this approach builds a new objective function to measure amplitude spectral difference between interval top and bottom, obtain instantaneous amplitude spectrum, and determine reflection time of formation top and bottom. Both numerical and real data tests show the proposed approach can effectively extract IIAF indicating in a certain extent the transverse distribution of high absorption area, which will be helpful for hydrocarbon detection.
蔡涵鹏, 贺振华, 王梦, 李亚林, 何光明, 邹文. 一种层段非弹性吸收因子估算方法[J]. 石油地球物理勘探, 2015, 50(4): 672-677.
Cai Hanpeng, He Zhenhua, Wang Meng, Li Yalin, He Guangming, Zou Wen. A novel approach for interval inelastic absorption factor estimation. OGP, 2015, 50(4): 672-677.
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