Absolute pressure
Total pressure equal to gauge pressure plus 14.7 lbs./sq. in at sea level
Acoustic Log
a measurement of the velocities of sound waves imparted to a formation in a well and used mainly for determination of rock porosity
Acreage
pertaining to an area of ground covered by a company’s exploration permits
Air-Fuel Ratio
The ratio of air weight to fuel wight consumed in an internal combustion engine or furnace.
Aliphatic
A class of saturated or unsaturated carbon compounds, in which the carbon atoms are joined in open chains.