宽方位地震OVT域方位各向异性校正技术

为提高宽方位地震资料的成像质量，需进行宽方位各向异性校正处理。相干谱拾取是一种OVT（offset vector tile）域的各向异性处理方法，它以OVT域偏移后的方位道集为基础，以叠加剖面作为引导，进行时差拾取，反演出各向异性参数，即求出方位各向异性的方位角和各向异性强度，进行方位各向异性校正处理。将相干谱拾取方法应用于理论模型和实际的宽方位地震资料处理中，消除了方位各向异性时差的影响，提高了地震成像质量，为后续的地震资料解释及储层预测提供了高质量的数据。

Analysis and processing technology of azimuth anisotropy in OVT domain of wide-azimuth seismic data

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.