Quantitative analyses of seismic using well logs require two sets of data, none of which are<br>usually available: dipole sonic logs, due to cost and velocity and bulk density logs in the<br>shallow part of the holes, due to large holes.<br>In this abstract, we present a general rock physics based technique for constructing<br>pseudo-logs. The pseudo-shear sonic log is based on the work by Dutta & Wendt’s (1993).<br>The shallow pseudo-logs for P-velocity and density are based on mechanical compaction<br>theory and rock physics based velocity-porosity relationships. We test the technique on well<br>log data in the Gulf of Mexico.


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