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...{figure number|1}}When a sample contains oil or gas and water (where water wets the grain surface), the pore throat size (B) for oil or gas flow is less th ...n grain surfaces. When a sample contains oil or gas and water (where water wets the grain surface), the pore throat size (B) for oil or gas flow is less th

...uous phase is affected by capillary effects. The phase that preferentially wets the grain surfaces (usually water) is continuous. The nonwetting phase is g

If a liquid wets a surface, it tends to spread and cover that surface. Observed on a microsc

M91FG25.JPG|{{figure number|2}}In a water-wet reservoir, water wets the surface of the grains, and hydrocarbons occupy the central parts of the