دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a tertiary recovery method involving injection of air into the formation and igniting the oil. Under the right conditions, the heat produced from combustion of the heavy ends that are trapped on the sand grains lowers the oil viscosity and liberates light

n pi: 1. the parts of a hydrocarbon mixture that have the highest boiling point and the highest viscosity (such as fuel oils and waxes). 2. hexanes and heptanes in a natural gas stream.

n pi: see heavy ends.

n: oil composed mainly of heavy ends.

lower gravity, often higher viscosity oils. Normally less than 28o API gravity.

n: a saturated hydrocarbon of the paraffin series;one of the heavy ends in a gaseous hydrocarbon mixture.

n pl: the settlings in the bottom of a storage tank. See basic sediment and water, bottoms.

the near solid or highly viscous residuals at the bottom of an oil storage tank, generally composed of a large amount of paraffins, silt, heavy ends, etc.