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The acoustic and density logging curves of whole well can be used in seismic inversion to build the velocity model�� Due to the geological conditions��observations��instrumentstatus��and many other factors limit��it is generally hard to obtain the whole logging data from one well�� To preserve the integrity of logging data��we derive the relationship between the rock matrix density��resistivity��P-wave velocity��and porosity with the Archie's law and Gardner's equation in petrophysics�� And��we can predict other logging curves with the derived relation�� It shows the feasibility in the numerical analysis from a field test��