Application Of Pre-stack Seismic Attributes Analysis To Reservoir Prediction In The Area X5

Pre-stack seismic attributes analysis and pre-stack simultaneous inversion are newtechnologies of lithologic reservoir prediction. It fully utilizes pre-stack seismic attributes toimprove the accuracy of reservoir prediction, especially the reliable forecasts in the physicalproperties of the reservoir and the direct prediction of fluid. Lithologic hydrocarbon reservoirexploration gradually absorbs great attention and becomes one of the new technologies ofhydrocarbon exploration.In comparison of post-stack seismic attributes, pre-stack seismic attributes contain moreinformation, because it is not treated by superposition of stack. This can be more reliable thanutilizing the post-stack seismic attributes.In this paper, the following details are analyzed and studied by taking Carboniferousreservoir in X5for a target, through comprehensive utilization of geology, logging andseismic; from well logging analysis; based on petrophysical analysis; with the research ofpetrophysical forward modeling as feasibility evaluation standard and pre-stack simultaneousinversion as the means.Firstly, through analyzing the theoretical basis of pre-stack seismic attribute analysis, thispaper explaines the physical meaning of the elastic parameters and proves the feasibility ofpre-stack seismic attributes analysis, which provides ideas for the choice of methods forreservoir prediction research in the studied area, and then lays the foundation of thesubsequent application research. Secondly, the paper researches petrophysical parametersanalysis and petrophysical forward modeling based on actual research area to get a series offitting formulas of the reservoir. And through the rock physical parameters forwardness, thepaper calculated each well’s petrophysical parameters such as shear velocity, density and so on. Then pre-stack seismic attributes such as P-wave impedance, S-wave impedance, the ratioof P and S wave velocity, density, intercept and gradient were extracted by use of pre-stacksimultaneous inversion. In addition, seismic attributes such as poisson ratio, Lambda/Mu,LambdaRho and MuRho were calculated according to the relationships between poisson ratio,Lambda, Mu and the ratio of P and S wave velocity, P-wave impedance, S-wave impedance,density. Finally, the results of the inversion are analyzed comprehensively by means of singleattribute analysis, multiple attributes analysis and facies and fluid probabilities analysis, thusfavorable reservoirs of the research area were identified and recommendation well wasproposed.The technologies play good effects in the area X5and provide powerful technicalsupport for the further exploration and development in the area. In addition, it can beextended and applied to the similar area.