The Study Of The Seismic Data Processing Method In Loess Tableland And Mountainland

Most of oil-field in the east of our country are located in the mountainland ,desert,loesstableland,hill,etc.Although the underground resources quantity is very abundant,because theinfluence of surface statics and low s/n ratio problem,make the seismic data was restricted tosolve the geology problem in this area. The seismic data have serious statics,low s/n ratio and data quality difference greatly inloess tableland ,which is data processing difficulties. After being refractive statics in thisarea, the statics problem of middle-wavelength, long-wavelength were settled effectively,butthe method based on reflective residual statics can remove short-wavelengt problem, two ofthis method combined compactly must improve the precision of statics .Classify the noise ofseismic data, aimed at the difference characteristic of vary noise,using the difference methodof noise-eliminated,carry out noise-eliminated in series before stack,so make the niose iseliminated effectively. The technology of amplitude recovery and wavelet processingcombined can remove the difference of seismic data quality,then carry out the processing ofsurface consistence. The method to combined constant velocity scan,varies velocity scanand super gather have sloved the difficult problem of picking velocity in complex area. Thetechnology of high-precision velocity analysis and the method of advanced seismicmigration combined ,have improved imaging precision . The study of this problem ,have settled the statics problem effectively in loesstableland ,have improved the s/n ratio much,have explored a suit of processing methodand processing flow which full and adapt to loess tableland area.