石油地震勘探OVT数据处理技术应用

Application of OVT data processing technology in petroleum seismic exploration

宽方位代表了石油地球物理地震勘探的一个增长趋势。它不仅可以优化复杂地下结构的照明,还可以提取与方位各向异性相关速度信息。共偏移距矢量片(OVT)处理是一种方便进行方位各向异性分析的技术,是宽方位地震处理的一种有利于提高成像精度的方法。经验证明,OVT在提高中深层成像质量具有巨大潜力。通常存在方位各项异性严重的工区更适合采用OVT处理技术。本文将3D地震数据划分为OVT域,并进行了噪声消除、数据规则化和叠前深度偏移处理。与传统处理相比,结果表明OVT在提高成像精度方面具有显著优势。

Wide azimuth represents a growing trend in petroleum geophysical seismic exploration.It can not only optimize the lighting of complex underground structures,but also extract velocity information related to azimuth anisotropy.Common offset vector imaging(OVT)processing is a convenient technique for analyzing azimuthal anisotropy and is a beneficial method for improving imaging accuracy in wide azimuth seismic processing.Experience has shown that OVT has great potential in improving the quality of mid to deep imaging.Usually,work areas with severe anisotropy in orientation are more suitable for using OVT treatment technology.This article divides 3D seismic data into OVT domains and performs noise cancellation,data regularization,and pre stack depth migration processing.Compared with traditional processing,the results indicate that OVT has significant advantages in improving imaging accuracy.