دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: adding too much chemical in batch treating, resulting in an emulsion that is very difficult to break.

n: when treating fluid , if the treating agent adds too much and exceeds permission, we can not get proper effection and demages the inherent character.

n: (ORP) the difference in voltage shown when an insert electrode is immersed in a reversible oxidation-reduction system. It is the measurement of the systems state of oxidation. Also called Eh, redox potential.

n: at ground level, one of the primary ingredients in smog and a poisonous form of pure oxygen. Smog ozone is created by sunlight acting on nitrogen oxides and volatile organic compounds in the air. Ozone high in the atmosphere forms the Earths main shield against the suns ultraviolet radiation.

a plot of P/Z vs. cumulative production that indicates compartmentalization if not a straight line.

n: a solid pack of ice that covers more than half of the visible sea surface. packing n: a material used in a cylinder, in the stuffing box of a valve, or between flange joints to maintain a leak proof seal.

n: a fractionation or absorption column filled with small objects that are designed to have a relatively large surface per unit volume (the packing),instead of bubble trays or other devices, to give the required contact between the rising vapours and the descending liquid.

pressure activated circulating valve.

n: I. a device on a logging tool that contacts the wellbore when the log is being taken. 2. fluid placed in a well to serve a special purpose. 3. a concrete foundation on which a drilling rig rests.

a volume of fluid, without proppant, injected in front of a frac job to establish frac width.

n: a device (e.g., a minilog) designed to measure the resistivity of small volumes of formation near the borehole. It consists of three electrodes embedded in the centre of an insulated fluidfilled rubber pad that is held against the side of the borehole. The electrodes produce two curves-one 1.5 inches (3.8 centimetres) in depth and one 4 inches (10.2 centimetres) in depth. The separation between the two curves shows the difference in resistivity between the mud cake and the formation immediately behind the mud cake.

n: the amount of fluid placed in a well to serve as a pad. See also pad.