| Because of large surface relief and complicated lithological mutation and underground structure,very low signal to noise ratio data is obtained in the seismic exploration of the complex exploration area.In order to meet technical requirements,shot points and receiver points offset more,encryption more.There are some mistakes in the field production process,and the difficulty of data processing is increased.Some problems will be encountered during the processing: how to monitor the data accurately,how to evaluate the data accurately and how to solve the imaging problem of low SNR data.Through the analysis of the research area,some technical methods are adopted to solve these problems.When the data is monitored,it is difficult to achieve the accuracy using the accuracy of the monitoring method LMO.After the research,a new quality control method is adopted,which is first breaking fitting.By comparing the two methods,the shot location of quality control work can be accurately and efficiently completed in this method,which meets the complex data quality control work,thus achieve good results;For the data evaluation,the seismic data format is converted,and some new records are formatted.Through these records,it is very easily to evaluate the data and monitor the quality of the field at the same time,so this method fits the data quality control.In the settlement of signal-to-noise ratio and data imaging,some key technologies-static correction technology,effectively pre-stack noise technique,surface consistent processing technology are used in the treatment process,thus improve the seismic data signal-to-noise ratio;after the data signal to noise ratio improved,the fine velocity analysis and pre-stack time migration technique to solve the complex exploration area of low signal to noise than the imaging problem of data,thus obtain ideal effect after the study.At the same time,a suit of processing method for low SNR of complex exploration area is formed. |
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