The IRIS petroleum laboratory offers two explicit methods for generating capillary pressure curves from core plugs: The centrifuge and the porous plate techniques. Additionally, we can simultaneously determine the capillary pressure together with the relative permeabilities, through interpretation of flooding experiments.
The system is equipped with core holders, which allow application of overburden pressure and makes it possible for analyses on poorly consolidated core material. In addition the centrifuge equipment has been further developed to include runs of both full reservoir temperature and pressure with live crude oil.
Porous plate technique, drainage and imbibition
The porous plate method is the preferred method for simultaneousdetermination of capillary pressure curve and resistivity index.
To reduce time consumption in such tests, high velocity ceramic plates are used. Using both water wet and oil wet plates, this technique is ideally suited for hysteresis studies and yield optimal values of the end point saturations, Swi, Sor and Sgr.
Tests can be performed at ambient conditions, semi reservoir conditions with stock tank oil and at full reservoir conditions with live crude oil.