Discovered resources of oil or natural gas that are commercially recoverable, starting on a specific date.
RESERVE REPLACEMENT INDEX (RRI)
Variation in the proven recoverable volume in relation to the accumulated output of a given year.
There are two types of residues: atmospheric (RAT), which is the fraction of oil from an atmospheric distillation unit whose distillation varies from 420º C and above; and residues from deasphalting units (asphalt residues), which are refined products resulting from the extraction of light fractions from the vacuum residue with a paraffin solvent (propane or butane).
RETARDED COKING UNIT
The most severe form of thermal cracking, transforming vacuum residue into lighter products, additionally producing coke.
The vertical portion of an outflow line that conveys oil and/or natural gas from the well to the platform.
Return on Total Assets. Measures the efficiency of the employment of funds by a company, dividing the net operational revenue for the period by the total assets at the end of the period.
Return on Capital Employed. Net operational revenue - financial income (net of income taxes and social security) / loans and financing + stockholders' equity - financial investments.
Return on Equity. Net operational revenue / stockholders' equity - net operational revenue for the period.