Gravity and seismic joint inversion method of velocity and density parameters
Velocity and density parameters play an important role in seismic data processing and reservoir prediction.However,the cou-pling of multiple parameters makes it difficult to reconstruct density in full waveform inversion.In order to obtain more accurate density information,this paper incorporated gravity gradient data into the full waveform inversion process,optimized the density update algo-rithm,and formulated a gravity and seismic joint inversion strategy.First,the initial model reflecting the overall density information of underground media was obtained through gravity gradient data inversion,and then the construction and solution of the objective function of synchronous joint inversion of velocity and density parameters were carried out.The method in this paper avoids the limitation of the prior velocity and density relationship,and reduces the dependence on the initial model.Through the model trial,the results show that the addition of gravity gradient data improves the quality of the density inversion results of the waveform,and verifies the effectiveness and accuracy of the method,which has great application potential.
joint inversion of gravity and seismicdensity inversionacoustic wave equationequivalent staggered griddepth weighting
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