M ThousandMM MillionB Billionbbl Barrel of crude oil (ie 159...

M Thousand
MM Million
B Billion
bbl Barrel of crude oil (ie 159 litres)
PJ Peta Joule [1,000 Tera Joules (TJ)]
Bcf Billion cubic feet
Tcf Trillion cubic feet [1,000 Billion cubic feet (Bcf)]
BOE6 Barrel of crude oil equivalent – commonly defined as 1 TJ equates to circa 158 BOE6 – approximately equivalent to 1 barrel of crude equating to circa 6,000 cubic feet dry methane on an energy equivalent basis