Research On Seismic Acquisition Technique And Static Correction Method In The Desert Area Of Tarim Basin

In recent years the exploration of carbonate rock of Tarim desert areaincreasingly achieves important breakthrough, additive verified controlreserves have exceeded three hundred million ton, and there has a quitewide future of petroleum and gas exploration But restrained by complicatedsurface and subsurface seismic and geologic condition, seismic data qualityhas still restricted the petroleum and gas exploration process of this area. Soit is important to study the seismic acquisition technique of this area, inorder to enhance the quality of field acquisition data, and guide recentbrainstorming exploration work, and realize combination of theory andpractice.In this paper study and analysis are taken on four aspects which affectfield acquisition data quality. It is emphasized on field 3D seismicexploration survey optimized design and static correction in desert area ofTarim basin.In aspects of 3D seismic exploration survey optimized design, theremainly has Ordovician carbonate rock crack reservoir in desert area ofTarim basin, so Survey parameter should make seismic propertyhomogeneous and has good effect for predicting reservoir. For this propose,tow aspects of theoretical analysis of survey parameters effecting seismicproperty and bin property effecting seismic property have been taken toachieve survey optimized design method and direction of attenuatingfootprint effect. And method of survey design of enhancing S/N ration andresolution has been put forward.For field reception, aimed at the loose surface and strong absorptionand attenuation, geophone characterization parameters, array mode, fieldgeophone reception condition have discussed, and improving direction hasbeen put forward. In aspects of initiation in desert area, firstly theoreticalanalysis has been taken on seismic wave attenuates degree whenpropagating underground and how record apparatus system records signal.At this base, combined with demolition engineering theory, how differentwallrock media and initiation dynamite amount effect initiation wavelethave been discussed, and principle of initiation dynamite amount has beenput forward combined with field production test.In terms of static correction method, at the base of analyzing theproperty of surface continuity and deficiency of conventional sand curvemethod, optimized sand dune curve static correction method has been putforward. First through combination with theoretical demonstration andpractical materials different surface investigation method versus differentsaturated surface depth and survey parameter ascertained to enhanceaccuracy of surface investigation. And at the same time seismic phase ofinvestigation data and energy change have been analyzed to enhanceinterpretation accuracy. Finally, statistical analysis taken to investigationdata, and curve graticule of different continuity property media has beenbuilt to obtain high accuracy statics.These techniques show good effect after they have been used inapplication.