Study Of Compensation For The Near Surface Seismic Signal On Desert

As the development of petroleum exploratation,seismic exploratation has been improved from the ordinary study of geological structure to the complex study of the structure and detection of lithology.All these new researches depend on the development of seismic exploratation resolution and signal-to-noise ratio.If the development of seismic exploratation resolution and signal-to-noise ration is not enough,the seismic exploratation technology will not be able to use well on the study of reservoir and the description of petroleum reservoir.The improvement of seismic exploratation resolution is a system subject,which include three points such as collection,processing and interpretation.Though the field collection and the quality of the field work have been improved greatly these years, under the limitation of the existing seismic theories and field work techonolgy,both of them can not be developed in a short time.In these years,as the appearance of some new technologies such as conherence cube,frequency diversion,identity fusion, and interection in the seismic interpretation,the small signal about sand bodies in the seismic signal can be detected,but the most important problem is if there is signal about sand bodies existing in the seismic signal.So the point of the problem and the hope of the resolution of geological problems are on the step of the seismic date processing.The main point of this paper is to improve the seismic exploratation resolution,keep step with the newest science development.Based on the use of well log date,the exploitation of the new software,and the study of the fore people,putting out the theory of cutting part frequency of the well log date to compute the filter to compensate the seismic stacked date.Studies prove that the use of part-frequency filter greatly improve the seismic date resolution,and can be widly used. At the same time,the well log date using on compensating the stacked seismic date has been proved to be useful in dealing with the absorbing and attenuation problem inspired by the near surface of the desert area,but only one filter can be used.On the truth,the near surface structures of the desert area change greatly,and as the changing of the different site,the absorbing and attenuation to the seismic wave aroused by the near surface structure of the desert area change outstandingly.The study of space-changed filter,specially the two well space-changed filter,has been proved that it could be uesed very well and has a all-right future.