| The gas accumulation condition is very advantageous in the loess plateau area in western China,and the potential for oil and gas exploration is huge.The seismic exploration technology in the complex loess plateau area restricts the progress of oil and gas exploration.The difficulty of seismic data processing in the Loess Plateau is mainly due to the low signal-to-noise ratio of seismic data caused by complex surface conditions and the problem of surface static correction.In order to obtain an accurate cross section on poor data,providing a high signal to noise ratio for interpreted seismic record high-resolution,it requires the use of more suitable processing techniques.This paper summarizes the research and development of the loess plateau,including three aspects: data acquisition,static correction and attenuating noise.This paper summarizes the data characteristics of the loess plateau area,mainly from the static correction,signal to noise ratio,energy and frequency.This paper summarizes the strong interference waves in the Loess Plateau,mainly including surface waves,refraction multiple waves,linear noise and random noise.According to the type and characteristics of noise,the most appropriate processing technology is summarized to maximize the difference between noise and effective signal,and then use the corresponding method to attenuate the noise.Static correction using the Diving wave tomography static correction,for the surface wave,the use of cross-domain three-dimensional cone filter,and achieved good results;For multiple refraction waves and linear noise,the transformation to the linear Radon domain for processing;using the curve transform using its correlation properties can be a good deal of random noise.Through the study and processing of the signal processing technology of the southwest loess plateau in the southwest of Tarim Basin,it is understood that the technology is not still perfect and needs more research. |
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