摘要
随着宽方位高密度地震采集技术的普及,宽方位地震资料处理技术也日趋完善。目前,OVT域作为全新的数据处理域,因具有延伸全工区的单次覆盖、偏移后保留方位角信息、良好的一致性等优良特性而取代传统的分方位处理,成为宽方位地震资料处理的主流技术。此次基于淮北煤田某区的宽方位高密度地震数据,从OVT原理入手对OVT技术进行了比较全面深入的分析,并应用OVT分组、OVT域数据规则化、OVT域叠前时间偏移及OVG集方位各向异性校正等技术方法,得到了保留方位角信息的叠前道集。与传统的共炮检距域道集相比,基于OVT域处理技术的数据解决了方位各向异性及覆盖次数不均匀造成的种种处理问题,改善了处理效果,提高了处理精度,为解决煤田资料方位各向异性问题、实现真正的宽方位地震处理奠定了基础。
With the popularization of seismic acquisition technology with wide azimuth and high density,wide azimuth seismic data processing technology is increasingly perfect.At present,OVT domain is a bran-new data processing with excellent characteristics such as single coverage of the whole area,azimuth information record after migration,and favorable consistency.It has replaced the traditional one and become the mainstream technology of wide azimuth seismic data processing.Based on the wide azimuth and high density seismic data of a certain area in Huaibei coalfield,the OVT technology has been analyzed comprehensively with the OVT principle.Besides,by OVT grouping,OVT data regularization,OVT prestack time migration and OVG set azimuth anisotropy correction,the prestack gather preserving azimuth angle information can be obtained.Compared with the traditional offset gather,the data processing based on OVT domain technology solves all kinds of processing problems caused by Azimuthal anisotropy and uneven coverage times,which improves the processing and precision.It lays a foundation for solving the problem of azimuthal anisotropy of coal field data and realizing the real wide azimuth seismic processing.
作者
李文花
Li Wenhua(Geophysical Prospecting Research Institute, CNACG, Zhuozhou Hebei 072750, China)
出处
《工程地球物理学报》
2020年第3期300-307,共8页
Chinese Journal of Engineering Geophysics
