A Study On Lithologic Reservoir Prediction Of Pre-stack Seismic Attribute Inversion On HTB

Pre-stack seismic attribute analysis and elastric parameter inversion based on pre-stack seismic data , have been developing rapidly in recent years, which are the new technology of lithologic reservoir prediction. They are the leading new technology of reservoir prediction at home and abroad. As the new technologies just start to be tried in JiLin oilfield . The scientific study project is established in order to amplify the application of the new technology as soon as possible, form productive capability gradually, accelerate the pace to apply and develop the new technology, make the prediction of the shallow lithologic reservoir to reach a quite new level , and fill the blank of the application of pre-stack information in Jilin oilfield.Firstly ,pre-stack trace gathers for original seismic data need to be processed in the course of the study to make an analysis for the reservoir physical characteristics of the logging data within the area, define the reservoir sensitive elastic parameters.Secondly , pre-stack elastic wave impedance inversion and three parameter joint inversion are processed for processed Fidelity Amplitude Preservation seismic data to get the pre-stack small and large angle elastic wave impedance, p-wave and s- wave velocity, density, poisson ratio, p-wave velocity ratio.Finally ,with the result of pre-stack inversion ,to make reservoir comprehensive analysis work----the sections, slices and crossplots of 3D and so on , to make structural maps and thickness maps of 13 favorable sandbody top of Saertu, Gaotaizi and Fuyu oil formation, to provide a proposal target.By two years elaborate work, to have studied and applied a set of pre-stack seismic trace gathers processing technology which is directed to pre-stack seismic attribute and pre-stack inversion to form a series pre-stack seismic attribute and inversion processing technology based on rock physical analysis. The technology is good of application effect in the region where it has no obvious speed difference between the reservoirs and un-reservoirs.