Coalfield High Precision Seismic Data Processing Technique

China today,a strong proponent of green energy,renewable energy development and use.However,the report from 22 nd World Energy Congress held in South Korea in October 2013 states: "By 2050,fossil energy remains the foundation of the world energy,coal will continue to play an important role in the long-term." By this sentence,we know that although the new energy developing greatly,but within the next 30 years,coal is still one of the major energy sources.How to improve the signal to noise ratio and resolution of seismic data is the eternal theme of geophysical work,the effect will directly affect the data interpretation and in-depth application.With the continuous development of coal exploration,geological conditions of exploration from the surface to the underground areas are becoming increasingly complex,data processing requirements are also getting higher and higher.At the same time,exploration technology has undergone tremendous changes,with high density and high-precision acquisition technology continues to evolve,the signal to noise ratio and resolution of process put forward new requirement,the higher signal fidelity.Increased daily acquisition data and consequent huge amounts of data,challenges the efficiency of processing.Therefore,it is imperative to research the approach to improve the signal to noise ratio and resolution to meet current exploration model,and research the implementation technology to meet efficiency requirement of massive data processing.Coalfield seismic data processing technology,the author of this paper,on the basis of fine seismic data analysis,from static correction of form a complete set,multi-domain noise before stack,serial deconvolution,from several aspects,such as prestack migration imaging test and comparison,to determine reasonable and effective process,module,obtain high signal-to-noise ratio,high resolution and high fidelity of the results of the data,ensure the accuracy of seismic data interpretation,geological analysis,lay a foundation for coal safety,efficient development.No matter what kind of static correction method has its basic premise conditions and scope of application.By tomographic static correction,refraction static correction,solve affect the structural feature of long wavelength static correction problem;Through the residual static correction on reflection wave,solve the short wavelength static correction problem affecting the quality of imaging.Through the application of multi-domain noise before stack technology to outliers,alternating current(ac)interference,surface wave and anomalous amplitude disturbance respectively clamped down,reach the purpose of improve the signal-to-noise ratio of gathers data.In prestack gathers data,USES the Q absorption compensation,surface consistent deconvolution,predictive deconvolution,such as technology,gradually improve the resolution of seismic data.Using prestack time migration velocity model building,depth and velocity update,prestack depth migration processing technology,improved the precision of structural imaging,small structure,small fault,obviously improve the identification accuracy of geologic abnormal body.Application of the above several aspects technology in coal field has obtained the good effect in practical data processing applications.