The Study On The Combined Processing Method Of Ocean Bottom Cable Data

The data acquisition of Ocean Bottom Cable is a marine seismic acquisition technology developed in recent years.It can make up the shortage of the data acquisition of the towing cable in the shallow sea and the obstacle area.The Ocean Bottom Cable adopts the four component geophone,combines the hydrophone with the magnetoelectric geophone and collects the seismic data simultaneously,and uses the pressure geophone and the velocity geophone to make the difference between the ghost wave and the first wave.In response to the response characteristics,a proper proportion of them can be combined to suppress the ghost wave and enhance the results of the effective signal,which lays a foundation for the imaging of subsequent seismic data and improves the accuracy of seismic data interpretation.There are leaking transverse wave interferences in the land survey data,and the signal-to-noise ratio is relatively poor,which affects the merger effect of land and water data.The paper uses three-dimensional sparse Taup transform to suppress the transverse wave noise of submarine cable data based on the speed difference between the interference wave and the effective wave.At the same time,a three-dimensional high-order sparse Taup transform was introduced to maintain the amplitude of the events in the transformation process,effectively maintaining the energy of the effective wave.The dissertation also studies the data merge technology of double inspections,analyzes the characteristics of the double inspection data,obtains the best amplitude and phase calibration factors for the land and water survey data,and obtains the combined ratio coefficients,and integrates the land and water inspections to achieve the purpose of ghost suppression.Based on the in-depth study of this method,the paper conducts forward simulation of double-check data and uses the techniques studied in this paper to deal with the theoretical model,effectively suppressing ghost waves,and using this technique to process three-dimensional actual data and achieve better results.Satisfactory processing results fully prove the effectiveness and stability of the algorithm.