دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the process of lowering pipe into the wellbore when the well is shut in on a kick and when the pipes weight is not sufficient to overcome the force of well pressure.

n: lighter hydrocarbons that exist as a liquid under reservoir conditions but that effervesce as gas when pressure is released during production.

n: Dissolved gas in wellbore or reservoir fluids. The gas will remain in solution until the pressure or temperature conditions change, at which time it may break out of solution to become free gas.

the natural gas that is dissolved in a crude oil.

a drive mechanism where a drop in pressure releases gas from the oil that helps drive the oil towards the wellbore. It is a poor recovery mechanism.

a wellbore caliper, useful in larger wellbores and washouts that uses sound through thin liquids to map the wellbore.

n: see acoustic well logging. sonic meter n: see ultrasonic mete,;

n: A type of acoustic log that displays traveltime of P-waves versus depth. Sonic logs are typically recorded by pulling a tool on a wireline up the wellbore. The tool emits a sound wave that travels from the source to the formation and back to a receiver.

n: a wellbore or formation known to contain hydrogen sulfide gas.

n: (SGA) an organization founded to promote the development of the gas distribution and transmission industry, to encourage scientific research affecting the industry, to exchange ideas and information among member companies, and to cooperate with other organizations having mutual objectives. SGA is the largest of four regional gas organizations started in 1908. Address: 3030 LBJ Freeway, Suite 1300. LB60;Dallas, TX 75234;(972) 620-8505;fax (972) 620-8518.

n: (SP) one of the natural electrical characteristics exhibited by a formation as measured by a logging tool lowered into the wellbore. Also called selfpotential or Sf.

n: (SP) a measurement of the electrical currents that occur in the wellbore when fluids of different salinities are in contact. The SP curve is usually recorded in holes drilled with freshwater- base drilling fluids. It is one of d1e curves on an electric well log. Also called self-potential curve.

One of the oldest and simplest logs. Measures voltage between formations and the fluid in the wellbore. Potential differences arise due to the differences between salinity of the formation and the wellbore fluids. SP is used for qualitative permeability,