Porosity Depth Saturation (PDS) model: Quantification of porosity preservation with burial in carbonate oil reservoirs, and application to infer oil charging time

摘要

Oil saturated carbonate reservoirs typically display anomalously high porosities compared to their water filled counterparts, and this has been largely documented in the literature. Nevertheless, no porosity model has been proposed yet to quantify the evolution of porosity preservation by oil under burial. This paper presents a Porosity Depth Saturation model (PDS model) for carbonate reservoirs, that quantifies for the first time the evolution of porosity with depth and oil saturation for a given charging time.