Study On Seismic Data Static Correction Technology Of Z Mining Area In Qinshui Coalfield

With the continuous acceleration of economic development,energy demand is growing.Coal resources are abundant and one of the most important energy sources in the world.They have the advantages of reliability,economy,easy storage and transportation,relatively stable price and flexible adjustment of production.China is rich in coal resources,making coal an indispensable energy resource.However,the exploitation of coal resources also faces some difficulties and challenges.For example,coal resources are distributed in different geological environments.In some places,the underground structure is complex and geological disasters are frequent,which increases the difficulty and risk of coal mining.At the same time,coal mining is a high-risk work.Frequent coal mine accidents have caused huge losses to human life and property.As an exploration technology with high detection accuracy,seismic exploration has played an important role in the exploration and development of coalfields.However,static correction is one of the key factors affecting the quality of seismic imaging.In order to ensure the acquisition of high-quality seismic imaging results to guide the safe mining of coalfields,this paper takes the seismic data of Z mining area in Qinshui coalfield as an example to study the static correction processing of wide-azimuth 3D seismic data,aiming to find a set of seismic data static correction processing methods and processes suitable for this mining area.The surface of Z mining area in Qinshui coalfield is undulating,and the thickness and the thickness and lateral variation of low-velocity layer are also large,which makes the static correction of seismic data in the mining area prominent and seriously affects the imaging quality of seismic data.Therefore,this paper summarizes the different factors affecting the static correction processing in this area by analyzing the geological background of the mining area and the original seismic data,including the quality of the first arrival picking,the selection of the number of refraction layers,the selection of the replacement speed and the residual static correction.These influencing factors are further debugged and modified to reduce the error.Combined with the quality of migration imaging section and the distribution of geological structure in the section,the correctness of these parameters and the effect of static correction processing are evaluated and analyzed from three aspects : the quality of shot set hyperbola,the quality of velocity spectrum and the quality of imaging section.After using the above technical ideas to process the seismic data of Z mining area in Qinshui coalfield,the results show that the technical ideas effectively improve the static correction problem in this area.In addition to improving the hyperbolic distortion of the event axis in the seismic single shot data,improving the resolution and signal-to-noise ratio of the seismic data,it can also obtain high-quality seismic data reflection wave migration imaging profiles,accurately reflect the real underground structure,thereby reducing the occurrence of coal mine safety accidents.This technical idea provides important technical support for seismic exploration and development of the mining area.