Application of Offset Vector Tile Technology in Ocean Wide-azimuth Data Processing
In recent years,wide-azimuth seismic exploration has gradually become one of the most direct means to improve the quality of seismic data.As the azimuth increases,the azi-muth anisotropy characteristics of seismic data will become more obvious.These characteris-tics of wide azimuth data not only make it more advantageous in fracture prediction,fluid i-dentification,pre-stack inversion,etc,but also increase the difficulty of seismic data pro-cessing.If the wide azimuth data is processed by the narrow azimuth method,it will not only fail to reflect the advantages of acquisition,but also reduce the resolution of the data due to the influence of azimuth anisotropy.Aiming at how to use the azimuth,anisotropy and offset information in wide azimuth data,this paper carries out the research and application of offset vector tile(OVT)technology based on the offshore wide azimuth acquisition.The method of OVT division under different observation systems is proposed,and the imaging accuracy of wide azimuth data is improved by five-dimensional regularization and velocity azimuth anisot-ropy correction.The multiple real-case applications show that OVT technology can better exploit the advantage of wide azimuth acquisition and provide high-quality gathers for subse-quent seismic interpretation,which has good industrial application value.The real-case ap-plications shows that OVT technology can maintain the azimuth information and coverage.Five-dimensional interpolation and anisotropy correction technology further improve the ima-ging quality of wide azimuth data.The final result is much better than the narrow azimuth data,and the OVT gather can be used for fracture prediction.Therefore,this technology plays an irreplaceable role in ocean wide azimuth data processing.
NETL
NSTL
万方数据
维普
