Hi guys,
I am new biggener for eclipse and desperate for help
I am simulating wettability alteration due to spontanious imbibition of lowsal water into carbonate core sample. I am using surfactant model but just the wettability alteration part. To the best of my understanding spontanious imbibition occurs for positive capillary pressure(pc), however to counteract gravity effect I put some negative pc as well in sat table. But I am uncertain how big should this negative pc be. I used first sat table with only positive pc and then different values for example,-0.05,-0.1,-0.3,-0.5 and -1 and I got different results which also dont follow the same trend. For example the highest recovery for -1,then -0.05 and then -0.3 etc.

Thanks in advance