دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: light waves shorter than the visible blue violet waves of the spectrum. Crude oil, colored distillates, residuum, a few drilling fluid additives, and certain minerals and chemicals fluoresce in the presence of ultraviolet light. These sub- stances, when present in mud, may cause the mud to fluoresce.

n: The unalterable objective element that affect the rate of drilling and cost in optimum parameter drilling ,for example ,geologic condition,strata behavior and burial depth.

the process of combining uncertainties, as with a Monte Carlo Simulation, to generate output parameters that are represented by probability distributions. No involvement of risk is implied. Example: multiplying ranges of length and width to arrive at a ra

n: 1. lack of continuity in deposition between rock strata in contact with one another, corresponding to a gap in the stratigraphic record. 2. the surface of contact between rock beds in which there is a discontinuity in the ages of the rocks. See angular unconformity, disconformity.

n: A geological surface separating older from younger rocks and representing a gap in the geologic record. Such a surface might result from a hiatus in deposition of sediments, possibly in combination with erosion, or deformation such as faulting.


a geologic aged erosional removal from the top of a formation. Reservoir rocks below this surface may contain hydrocarbon deposits if the unconformity acts as a seal.

hydrocarbon from unconventional and more difficult to produce resources such as (hydrocarbon): shale gas, shale oil, heavy and viscous oil, hydrates, tight gas, etc.

n: an uncontrolled flow of gas, salt water, or other fluid out of the wellbore and into another formation that the wellbore has penetrated.

n: The phnomenon of high pressure layer fluid flowing in another uncovered breakup layer at downhole.

an uncontrolled and unintentional flow of fluids from one formation to another, generally when one or more well barriers have been breached.

n: salt domes, depleted gas fields, or other suitable underground formations located in a companys major market areas into which gas is injected during low-demand summer months and from which it is withdrawn during highdemand winter months. May be 20 to 30 feet (6 to 9 metres) thick and can cover many square miles.

n: recoverable reserves lost as a result of damage to the reservoir.

n: (USCG) an agency of the United States Department of Transportation that establishes regulations for offshore vessels and approves standards for plan approval, construction, operation, and inspection of the hull, machinery, electric systems, industrial systems, and safety and lifesaving equipment of mobile offshore drilling units. The agency conducts rig stability tests, awards the original certification of the rig, and conducts annual inspections. It also establishes manning and personnel licensing requirements and investigates casualties. Address: 2100 Second Street SW;Washington, DC 20593;(202) 267-2229 or (202) 366-4000.