Analysis and processing technology of azimuth anisotropy in OVT domain of wide-azimuth seismic data
LI Ang1, ZHANG Liyan1, YANG Jianguo1, LI Na2, LI Shichao1, YAO Yulai1
1. Shenyang Center of Geological Survey, China Geological Survey, Shenyang, Liaoning 110000, China; 2. Research Institute of Exploration and Development of Daqing Oilfield Company Limited, Daqing, Heilongjiang 163712, China
Abstract:In order to improve the imaging quality of wide-azimuth seismic data, wide-azimuth anisotropy should be corrected. Picking coherent spectra is an anisotropic processing method in OVT (offset vector tile) domain. Based on azimuth gathers after migrating in OVT domain, it picks up time difference information on stacked sections, and then inverts anisotropy parameters. In other words, it obtains the azimuth and strength of azimuth anisotropy, and then corrects the azimuth anisotropy.Applied to theoretical models and raw wide-azimuth seismic data, the coherence spectra picking method eliminated the influence of azimuth anisotropy time difference, and improved the quality of seismic imaging, providing high-quality data for subsequent interpretation and reservoir prediction.
李昂, 张丽艳, 杨建国, 李娜, 李士超, 姚玉来. 宽方位地震OVT域方位各向异性校正技术[J]. 石油地球物理勘探, 2021, 56(1): 62-68.
LI Ang, ZHANG Liyan, YANG Jianguo, LI Na, LI Shichao, YAO Yulai. Analysis and processing technology of azimuth anisotropy in OVT domain of wide-azimuth seismic data. Oil Geophysical Prospecting, 2021, 56(1): 62-68.
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