Yaho Asks PERM:
I want to know something about the semi-permeable diaphragm method especially about the wetting and the non-wetting fluid. Based on my knowledge in the case of gas/water system, just the nitrogen is used to apply pressure on oil to displace water out the rock sample and a semi-permeable membrane or only gas and water can be used in the experiment.
So my confusion is that I’m not sure is gas-water-oil can be used or just gas and water can be used.
Dr. Apostolos Kantzas from PERM Answers:
This is the porous plate experiment. In order to have oil/water displaced by nitrogen, you must have a membrane that is partially oil wet and partially water wet. Or use two membranes one after the other. To make oil wet porous plates in not trivial and, as far as I know, not commercially available. It is something we would have to custom build.
Dr. Apostolos Kantzas