دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a thermometer that uses an electrical resistor to detect temperature and electrical means to measure and indicate temperature.

n: the electrical resistance offered to the passage of current;the opposite of conductivity.

n: the electrical resistance offered to the passage of a current, expressed in ohm-meter;the reciprocal of conductivity. Fresh-water muds are usually characterized by high resistivity, salt-water muds by a low resistivity.

measurement of a substance (or rock) to resist the flow of electric charge. Opposite of Conductance.

n: a record of the resistivity of a formation. Usually obtained when an electric log is run. See resistivity well logging.

one of various logs that measure some component of resistivity.

n: the recording of the resistance of formation water to natural or induced electrical current. The mineral content of subsurface water allows it to conduct electricity. Rock, oil, and gas are poor conductors. Resistivity measurements can be correlated to formation lithology, poros- ity, permeability, and saturation and are very useful in formation evaluation. See electric well log.

n: a kind of logging method in which the resistivity of rock is measured, usually used to evaluate the formation oiliness

n: a component that tends to impede the flow of electric current, usually without any inductive or capacitive effects. Often used in conjunction with a voltmeter.

n: of sucker rods, the frequency at which the periods of resonance are at a maximum.

n: (RCRA) a federal regulatory program designed to ensure responsible man- agement of hazardous waste at all levels of contact. i.e., generation, transportation, treatment, storage, and disposal;regulates the management of onland disposal of all solid wastes. This comprehensive program is designed to protect human health and the envirorunent from the unintentional exposure to solid waste that is identified as hazardous waste." Also institutes a "cradle-to-grave" monitoring program that closely tracks and regulates the handling of hazardous waste from the time the waste is first generated until it is disposed.

n pi: concentrations of naturally occurring liquid or gaseous hydrocarbons in the earths crust. some part of which are currently or potentially economically extractable. Some categories of resources are (1) from the economic standpoint. economic (recoverable, commercial),marginally economic, and subeconomic;and (2) from the geological standpoint, identified (subdi- vided into measured, indicated, and inferred),and undiscovered.

n: in a thermometer, the time required to indicate 63.2% of the magnitude of a change in the measured temperature.

force exerted by a centralizer against the casing to keep it away from the wellbore wall.