The seismic responses caused by different reservoir parameter variations are numerically simulated, ...

The seismic responses caused by different reservoir parameter variations are numerically simulated,

and then the feasibility of discriminating different reservoir parameters and realizing quantitative interpretation

using time-lapse seismic AVO technique is ensured. Based on Aki and Richards’ simplified AVO equation, the

formula of P-P wave and P-S wave for time-lapse seismic AVO was derived in details. According to the rock

physical model of S oil field and the formula acquired, the multiple time-lapse seismic AVO inversion equations

are achieved to discriminate the changes of oil saturation and effective pressure. It is shown by simulated data

experiment that the time-lapse seismic AVO inversion is feasible, and the formula derived in this paper is effective

to discriminate the changes of oil saturation and effective pressure, and to improve the precision of time-lapse

seismic interpretation.

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