Abstract
Using well log data from the South Eugene Island field, offshore Louisiana, we derive empirical relationships between elastic parameters (e.g., P -wave velocity, density) and effective stress along both normal compaction and unloading paths. These empirical relationships provide a physical basis for numerical modeling and allow us to investigate the effect of fluid pressure. The presence of more than one stress path complicates the prediction of fluid pressure from seismically derived interval velocities since the relationship between seismic velocity and pore pressure is multi-valued.
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