Research On Vsp Processing Method And Quality Control Method Based On GEOEAST

In recent years,with the deepening of oil and gas exploration,seismic acquisition technology and seismic exploration technology have been developed rapidly.The data obtained from seismic exploration are becoming more and more complex,which further increases the complexity of seismic data processing and interpretation.It also puts forward higher requirements for the accuracy of seismic data processing results.More effective methods are needed to monitor the seismic data processing process,improve the processing accuracy of seismic data,and ensure the effectiveness and fidelity of seismic data.Therefore,the characteristics of the original data can be understood and analyzed more intuitively,at the same time,reasonable processing flow and parameters can be established,effective quantitative analysis methods can be provided for quality control,the quality and process of seismic data processing can be effectively controlled,and scientific basis can be provided for subsequent geological target delineation,oil and gas detection,etc.GEOEAST system is an integrated software for seismic interpretation and processing independently developed in China,which can efficiently complete the processing and interpretation of large-scale seismic data.In this paper,the multi-dimensional VSP data of Xushen 21-1 well are processed and quality control methods are studied based on GEOEAST system.The subject takes the fidelity processing technology flow of seismic data as the main line,and introduces some key technologies and quality control methods in the processing flow,including static correction,first arrival pickup,amplitude compensation,three-component rotation,wave field separation,deconvolution,etc.This paper focuses on how the quality control method performs quality control in the important link of the amplitude compensation process.The VSP data processing quality control method studied in this paper strictly monitors the processing process of each link,strengthens the connection between each link,and achieves the purpose of moderate effect of a single link but best overall effect.The function of each link in the final imaging is clearly defined,so that the problem can be quickly located when the final result has problems,and the parameters can be adjusted.The superposition imaging results of multi-dimensional VSP data of Well Xushen 21-1 show that the amplitude energy and wave group characteristics have good lateral consistency on the common detection point gathers,and its in-phase axis is continuous,the signal-to-noise ratio is high,the wave group characteristics are clear,and the frequency band is widened by 15-20 Hz compared with the original VSP data.The results of the subject also show that the research on the quality control method has certain theoretical and practical application value.