TABLE OF CONTENTS S.I. (Syst me International) units are the recommended system replacing the Imperial system, which is however still entrenched in the oil industry.
b = barrel (US) = 159 litres = 42 US gals (Also B) boe = barrel of oil equivalent (see below for conversion) cf = cubic feet = 0.0283 m 3
Ma = million years
toe = ton of oil equivalent
Giant oilfield = >500 Mb initial reserves
k (kilo) = 10 3 = thousand (Also M)
M (mega) = 10 6 = million
(Also MM and m)
G (giga) = 10 9 = billion (US) (Also MMM, B, bn) T (tera) = 10 12 = trillion (US)
| sq. mile | sq. km | acre | hectare |
| 1 | 2.59 | 640 | 259 |
| 0.386 | 1 | 247 | 100 |
| barrel | cu. m | tonne | |
| 1 | 0.159 | 0.136 | |
| 6.29 | 1 | 0.855 | |
| 7.33 | 1.17 | 1 |
(Depends on oil gravity: above applies to Arabian Light 33.5? API)
Gas
1 m 3 = 35.3 cf
1 cf = 0.0283 m 3
Energy equivalents 1000 m 3 gas = 1 toe = 7.168 boe (in calorific terms) 10 000 cf gas = 1 boe (in value @$1.8/kcf, $18/b) 1 Tcf = 0.1 Gboe 1 b/d = 50 t/a (32? API oil)
Acreage: the amount of land held under concession. Alidade: an instrument for measuring distances, used with a planetable for...
