دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: water retained in the pore spaces, or interstices, of a formation from the time the formation was created. Compare interstitial water:

n: Water trapped within sedimentary deposits, particularly as hydrocarbons displaced most of the water from a reservoir.


the natural brine occupying the pore spaces. Usually this water is at equilibrium with the minerals in the formation.

n: 1. the water originally in place in a formation. See connate water: 2.any water that resides in the pore spaces of a formation.

the connate water.

n: a method of improved recovery in which heat is generated within the reservoir by injecting air and burning a portion of the oil in place. The heat of initial combustion cracks the crude hydrocarbons, vaporises the lighter hydrocarbons, and deposits the heavier hydrocarbons as coke. As the fire moves from the injection well in the direction of producing wells, it bums the deposited coke, releases hot combustion gases, and converts connate water into steam. The vaporised hydrocarbons and the steam move ahead of the combustion zone, condensing into liquids as they cool and moving oil by miscible displacement and hot waterflooding. Combustion gases provide additional gas drive. Heat lowers the viscosity of the oil, causing it to flow more freely. This method is used to recover heavy, viscous oil. Also called fire flooding.

n: water contained in the interstices, or pores, of reservoir rock. In reservoir engineering, it is synonymous with connate water. Compare connate wate,;

water within the pores.

n: the ratio of the mobility of a driving fluid (water or a chemical solution at residual oil saturation to the mobility of the driven fluid (oil) at connate water saturation. The mobility ratio affects the sweep efficiency of an improved recovery project.

a comparison of the ability of a fluid to move through another fluid or to displace the fluid.

n: an ovoid, sandlike particle that is formed when calcite accretes on a smaller particle.

spheres of calcium carbonate precipitated from connate water.

connate water that will not be displaced. See also Irreducible Water.