A numerical approach to petrophysics

摘要

A "numerical laboratory " can do the work of a core laboratory in a fraction of the time. When reservoirs are depleted, they change. We know this from observations of surface subsidence and reservoir compaction, from associated micro-seismicity, and from collapsing well casings. Time-lapse seismic permits us to see where changes occur and thereby position new wells in safer locations. While petrophysics traditionally has contributed to a static description of the reservoir, the concept of a dynamic reservoir also requires a dynamic petrophysical characterization. When reservoirs are depleted, the stresses change. So petrophysics has to be brought under stress.