Study On The Method Of Non-vertical Seismic Acquisition For LongDong -ZhenBei Area Of Loess Plateau Region In Ordos Basin

Now the point of Mesozoic Ordos Basin oil exploration has shifted to the southern basin of the Loess Plateau region, seismic and surface conditions in the area are complicated,the interference waves are abundant,the high-frequency attenuation is very serious, signal to noise ratio and resolution of seismic data are both low, the conventional seismic acquisition methods are difficult to play a role.Through study of the current status of the seismic acquisition method of Loess Plateau region, after a theoretical argument and a production test, the article have progressively developed the non-vertical seismic exploration techniques for the Loess Plateau region. Its superposition gathers have wide azimuth, and avoid near-gather interference and secondary loess interference, have good pressure noise effect, effectively improve the accuracy of exploration.The main contents of this article include:①the demonstration of Non-vertical observation system feasibility;① fine design of parameter in Non-vertical track pitch,offset,line spacing; ③ statics technology of loess Plateau region;④reasonable prestack noise suppression technology ⑤ the combination of deconvolution technique.Through this research, the acquisition method and processing flow suitable for Loess Plateau region have been developed, which establish technical basis for obtaining seismic data of high signal to noise ratio, high resolution.Through this research, at the same investment, the exploration area of application of non-vertical technology is more than three times the conventional two-dimensional exploration methods, under certain processing means 3D data can be collected. It is very important for oilfield development and data processing.