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| API gravity |
Scale used to express specific gravity of oils. Higher API gravity, lighter oil. |
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| Atmospheric pressure |
Weight of atmosphere on surface of Earth. At sea level approx. 1.013 bars. |
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| Bar |
One bar = 100 kPa |
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| Barrel (bbl) |
7.3 bbls = One tonne: 6.29 bbls = One cubic metre: One bbl = 159 litres approx. |
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| bcf |
Billion Cubic Feet (One bcf = 0.176 Mboe). |
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| bcm |
Billion Cubic Metres (One bcm = 0.83 MToe). |
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| Billion |
One thousand million (109). |
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| Block |
UKCS acreage one thirtieth of a quadrant (approx. 200 - 250 sq. kms). Generally defined in terms of latitude and longitude, at one-degree intervals. |
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| bopd / boe |
bbls of oil per day / bbls of oil equivalent. |
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| Brent blend |
International marker for crude oil pricing based on a blend of North Sea crudes. |
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| British Thermal Unit (BTU) |
One BTU or Btu = 1.05506 kJ = 0.293 watt-hour. |
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