In areas of high oil saturation,the oil rests on a film of water spread over the surface.If the rock surface is preferentially water-wet and the rock is saturated with oil,water will imbibe into the smaller pores,displacing oil from the core when the system is in contact with water
In areas of high oil saturation, the oil rests on a film of water spread over the surface. If the rock surface is preferentially water-wet and the rock is saturated with oil, water will imbibe into the smaller pores, displacing oil from the core when the system is in contact with water
If the rock surface is preferentially oil-wet,even though it may be saturated with water,the core will imbibe oil into the smaller pores,displacing water from the core when it is contacted with water.Thus,a core saturated with oil is water-wet if it will imbibe water and,conversely,a core saturated with water is oil-wet if it will imbibe oil
If the rock surface is preferentially oil-wet, even though it may be saturated with water, the core will imbibe oil into the smaller pores, displacing water from the core when it is contacted with water. Thus, a core saturated with oil is water-wet if it will imbibe water and, conversely, a core saturated with water is oil-wet if it will imbibe oil
Actually,the wettability of a system can range from strongly water-wet to strongly oil-wet depending on the brined interactions with the rock surface.If no preference is shown by the rock to either fluid,the system is said to exhibit neutral wettability or intermediate wettability,a condition that one might visualize as being equally wet by both fluids (50%/50%wettability)
Actually, the wettability of a system can range from strongly water-wet to strongly oil-wet depending on the brined interactions with the rock surface. If no preference is shown by the rock to either fluid, the system is said to exhibit neutral wettability or intermediate wettability, a condition that one might visualize as being equally wet by both fluids (50%/50% wettability)
Contact angle 0 When the interface is in intimate contact with the walls of a container,for example a capillary tube, the interface intersects the solid surface at an angle,0,which is a function of the relative adhesive tension of the liquids to the solid
Contact angle θ When the interface is in intimate contact with the walls of a container, for example a capillary tube, the interface intersects the solid surface at an angle, θ, which is a function of the relative adhesive tension of the liquids to the solid
direction of contact angle 0: from more polarity liquid to less polarity liquid
direction of contact angle θ： from more polarity liquid to less polarity liquid