some calculations on lng value to bpt, page-10

Rexsh
The margin on BPT oil is very large so oil production will never be unprofitable - even during GFC they were making 30 dollars margins . Also oil is produced progressively so unless oil went to 30 dollars and stayed there for 10 years again - no issue . I agree profitability or overall revenue may fall but I don't think there is much risk of their oil reserves being unprofitable
As for the gas - most of gas reserves ( 40mboe 2 equiv ) 232 pets joules are been negotiated now with a view of locking in through a GSA and oil linked price with a floor - achieving that would eliminate the risk of their gas been unprofitable
Lastly - the LNG projects are short gas in a big way - most of their production has already been bought so they need the gas lock in their margins - high demand = higher prices
Even in this environment BPT collects over 100 per barrel