Optimization Research Of Marine Seismic Evaluation And Design

With the deepening of offshore oil exploration,in order to meet the requirements of accurate imaging of seismic data in new exploration forms,marine seismic acquisition technology has been innovated and developed.Based on the calculation and analysis of the theoretical resolution of geological target by seismic acquisition design and evaluation technology,the effect of field operation under different acquisition parameters is simulated by indoor computer,and finally the optimization of seismic acquisition parameters is realized.Through the processing and analysis of the original seismic data,aiming at the problems of low frequency,low resolution,multiple wave and weak deep-seated imaging of the existing data,this research provides reliable parameters for seismic data acquisition through the optimization of seismic acquisition design,and continuously optimizes parameters through illumination analysis.By fully analyzing the relationship between cable length and improving signal-to-noise ratio and suppressing multiples,and combining with the buried depth of the target layer,the optimal cable length is obtained.Optimize source parameter by analyzing the peak-peak value,peak-bubble ratio and bandwidth of the air gun source.The characteristics of depth of source and cables are analyzed comprehensively,and the bandwidth is increased under the premise of ensuring the excitation energy,which lays a foundation for improving the imaging ability and resolution of seismic data.Combining with various difficulties that may be faced by on-site acquisition,the acquisition time is estimated,and the operation time window is optimized.The operation efficiency is greatly improved and the influence of weather on data quality is reduced.In practice,high quality 3D seismic data are obtained,which embodies the value of acquisition design optimization research.