The Research Of Deep3D Seismic Exploration Acquisition Technology Of Dehui Fault Depression In South Songliao Basin

DeHui fault is a favorable target area of JiLin oil field exploration in southern SongLiaobasin. Deep igneous rock is very development. Oil and gas resources are very rich. Butsurface structure is complex. The change of lateral velocity is quick. And there are very thicklow-velocity and slow-down layers. The oil field exploration and development are severelyrestricted by them. Restricted by acquisition equipment and technology, the quality ofseismic data collected in the past is poor and signal to noise ratio and resolution are low. Thisproblem has become a prominent contradiction of restricting the deep development of oil andgas exploration. The cause of the poor quality of data on the one hand is due to seriousseismic signal attenuation of near surface and deep geological conditions. On the other handthe investigation of the surface structure of DeHui fault depression isn’t clear.Well depthdesign is not reasonable. the pertinence solving measures were not taken. It reduces thesignal to noise ratio, imaging precision and the accuracy of the construction of deep data.Through the analysis of previous work area quality of DeHui fault, we find out theinfluence factor of the quality of seismic data. To take the pertinence solving measures toimprove the signal to noise ratio and the energy of wavelet of the deep reflection signals.Base on the analysis results of actual data, combineing with two-dimensional modelinganalysis and parameter argumentation, we study the bin, shot to receiver distance and angle ofacquisition parameter, to enhance the lateral resolution of the data. The enhancement of theenergy of wavelet and signal to noise ratio and broadening the absolute bandwidth ofstimulation waelet, are important link to ensure the quality of field acquisition of seismicdata. In deep seismic exploration in DeHui fault. Excitation technology need to be innovated.And we work out the motivating factor for deep collection of DeHui fault. Through the simulation analysis, selecting the best basal spur of geophone array can suppress theinterference of the regular surface wave and refraction wave, also suppress the interferenceof the high frequency noise environment and improve the signal to noise ratio and resolutionof data.