Techniques And Applied Studying Of Reservoir Prediction Based On Seismic

Seismic data is not only much more consecutive laterally than well data, but also contain a lot of reservoir information. So seismic reservoir prediction play a leading role in lines of petroleum exploration and development. At present, the application of the reservoir prediction based on seismic data still remain a level of studying, it lack pertinence in specific area and universality in petroleum fields.This dissertation insist that studying serves production. Firstly, the present and future of seismic reservoir prediction are demonstrated. Secondly, Xihu sag taken as a studying case, the new techniches such as reservoir property reconstruction,seismic spectral decomposition and seismic frequency attenuation are argued and applied.The reservoir property reconstruction is that a new acoustic log is made up from non-acoustic logs which are sensitive to reservoir. The new log not only indicate difference of stratum velocity ,but also distinguish difference of tratum lithology clearly. So high resolution seismic inversion can be fulfiled.Seismic spectral decomposition is based on the method that notches occur in frequency domain of seismic reflection of thin interbeds. Notches of frequency domain can be used to figure out thickness of beds. The more short a circle of notches is ,the more thin thickness of bed is.seismic attenuation analysis is that attenuation attribute can be used to predict reservoir by calibrating with well data. Theoretically, seismic attenuation take place when seismic wave pass through underground reservoir which contain gas or oil, power attenuation in frequency domain is larger in highter frequency field than in lower frequency field in this case.Based on application of above technices, the interest targets for drilling oil are argued and point out, meanwhile ,a set of seismic predicting technices dealing with thin reservoir is summarized.