دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the adhesion of a thin film of a gas or liquid to the surface of a solid. Liquid hydrocarbons are recovered from natural gas by passing the gas through activated charcoal, silica gel, or other solids, which extract the heavier hydrocarbons. Steam treatment of the solid removes the adsorbed hydrocarbons, which are then collected and re-condensed. The adsorption process is also used to remove water vapour from air or natural gas. Compare absorption.

n: A surface phenomenon exhibited by a solid (adsorbent) to hold or concentrate gases, liquids or dissolved substances(adsorptive) upon its surface, due to adhesion.

the attraction and holding of a layer of a chemical on the wall of a formation. Usually held by ionic charge or wetting preference.

large scale injection of pH>7 fluids. The basic materials may react with oils to form reactants that can reduce viscosity or affect wetting.

n: the rise and fall of liquids in small-diameter tubes or tubelike spaces, caused by the combined action of surface tension (cohesion) and wetting (adhesion). See capillary pressure.

the pressure necessary to achieve a given non-wetting fluid saturation of a rock.

n: the angle formed when two immiscible fluids meet a solid surface. For example, in a reservoir where water contacts a grain of sand or rock, it conforms to the shape of the solid and its angle of contact is at or near zero. Because of surface tension, any oil in the area does not conform to the shape of the water and grain;instead, the oil surrounds the wet grain and produces angles at the point of contact between the oil and the water.

the angle of intersection of two fluids on a given surface. Describes wetting and non-wetting behaviors.

n: displacement of hydrocarbons or fluids in a reservoir by increasing the non wetting phase saturation. See nonwetting phase.

n: the characteristic that certain material is very easily to wetting in the water.

n: the characteristic that certain material is very difficult to wetting in the water.

n: displacement of hydrocarbons or fluids in a reservoir by increasing the wetting phase saturation. See wetting phase.

the fraction of the pore space occupied by water when the hydrocarbon content is at maximum. This level of water can only be reduced below this level by flow of very dry gas that evaporates the water. Rewetting of a core with saturation below the irreduci