دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a complex force governing some fluid movements, especially in smaller pores. Capillary action is the result of adhesion and surface tension forces. Adhesion (or attraction) by a fluid to the walls of a pore creates an attracting (or repelling) force, whic

n: a pressure or adhesive force caused by the surface tension of water. This pressure causes the water to adhere more tightly to the surface of small pore spaces than to larger ones. Capillary pressure in a rock formation is comparable to the pressure of water that rises higher in a small glass capillary tube than it does in a larger tube.

n: The pressure or adhesive force produced by surface tension of water.

pressure differential between two immiscible fluid phases occupying the same pores caused by interfacial tension between the two phases that must be overcome to initiate flow.

n: 1. a disklike plate of anhydrite, gypsum, limestone, or sulphur overlying most salt domes in the Gulf Coast region. 2. impermeable rock overlying an oil or gas reservoir that tends to prevent migration of oil or gas out of the reservoir.

a erosion resistant covering or main pipe that is used when tubing is set deeper than the perforations or on the long string across from the upper perforations in a side-by-side completion.

n: a sedimentary rock composed primarily of calcium carbonate (calcite) or calcium magnesium carbonate (dolomite).

n: A kind of sedimentary rock whose content of carbonate is over 50%. Mainly consisted of calcite, dolomite and ankerite.

n: an interest in oil and gas properties that belongs, for example, to a working interest owner or unleased landowner who agrees to a joint operation without being willing to pay a share of the costs of the operation. An interest may be carried until the well pays out, at which point it may stop or may continue for the life of production. Stated another way, an agreement between two or more working interests whereby one party (the carried party) does not share in lease revenue until a certain amount of money has been recovered by the other party (the carrying party). The carrying party pays costs applicable to the carried partys interests in the property and is reimbursed out of the revenue applicable to the carried partys interest.

a fractional working interest in an oil and gas lease that arises from a deal between co-owners.

n: a large, specially designed, self-propelled workover rig that is driven directly to the well site. Power from a carrier rigs hoist engine or engines also propels the rig on the road. While a carrier rig is primarily intended to perform workovers, it can also be used to drill relatively shallow wells. A carrier rig may be a back-in type or a drive-in type. Compare back-in unit, drive-in unit.

n: A kind of portable service machine. The derrick mask, drawworks, motor and other necessary additional service rig.

a self propelled drilling or workover rig.

n: an interest in oil and gas created out of a greater interest and assigned by the owner. Examples are the grant of an overriding royalty interest out of a working interest and the grant of an oil payment out of a working interest.

n: the procedure of recovering lost or stuck equipment in a well bore in which casing has been run.

n: the difference between inflow and outflow of funds over a period of time. Cash flow can be positive (profit) or negative (loss).