دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a low-dip angle (nearly horizontal) reverse fault along which a large displacement has occurred. Some overthrusts, such as many of those in the Rocky Mountain Overthrust Belt, represent slippages of many miles.

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.

primary or compression wave. A seismic body wave that involves particle motion, alternating compression and expansion. It is the fastest seismic wave.

n: a tool for production logging that employs an inflatable packer. It ensures that all the fluid from the well passes through the measuring devices built into the tool.

n: a kinds working logging flowmeter with expending packer.

n: a liquid. usually salt water or oil. but sometimes mud. used in a well when a packer is between the tubing and the casing. Packer fluid must be heavy enough to shut off the pressure of the formation being produced. must not stiffen or settle out of suspension over long periods of time. and must be non-corrosive.

n: any fluid placed in the annulus between the tubing and casing above a packer. Along with other functions, the hydrostatic pressure of the packer fluid is utilised to reduced the pressure differentials between the formation and inside of the casing and acr

the fluid left in the annulus behind the packer. It may help offset pressure in the tubing or help reduce thermal losses.

n: a solid substance resembling beeswax but composed entirely of hydrocarbons. It is obtained from the crude wax that results from the solvent dewaxing or cold pressing of light paraffin distillates. The refined product is of relatively large crystalline structure, is white and brittle, and has little taste or odour.

n: a crude oil characterised by a high API gravity, a high yield of low-octane gasoline, and a high yield of lubricating oil with a high pour point and a high viscosity index. Popularly, and according to an early classification system, a paraffin-base oil is a crude oil containing little or no asphalt and yielding a residue from distillation that contains paraffin wax. Compare naphthene-base oil.

n: a circuit with two or more paths through which the current flows. The total current equals the sum of the currents through the various paths;the voltage is the same throughout the circuit.