SYSTEM AND METHOD FOR MODELING THE EFFECTS OF FLUID CHANGES IN LOW POROSITY HYDROCARBON RESERVOIRS

摘要

A system and method for modeling fluid effects in a subsurface reservoir combines high quality shear modulus data from modern sonic logs with the inherent stability of VpVs ratio to derive more credible dry frame bulk modulus, in turn leading to improved fluid saturation modeling and improve fluid effect modeling. The system and model are designed primarily for low porosity and mixed lithology subsurface reservoirs although they may also be used with confidence in high porosity reservoirs.