What is the volume of world natural gas reserves?
As of January 1, 2020, there were an estimated 7,257 trillion cubic feet (Tcf) of total world proved reserves of natural gas. Proved reserves of natural gas are the estimated quantities that analysis of geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from reservoirs under existing economic and operating conditions.
Consumption of natural gas worldwide is projected to increase from 120 trillion cubic feet (Tcf) in 2012 to 203 Tcf in 2040 in the International Energy Outlook 2016 (IEO2016) Reference case. By energy source, natural gas accounts for the largest increase in world primary energy consumption.
7,257 trillion / 200 TCF = 36 years.
Recently, global production is 4,000 bcm / year (https://yearbook.enerdata.net/natural-gas/world-natural-gas-production-statistics.html)
4,000 bcm = 141,258,666,288,888 cf = 141 TCF
So, if I did the math correctly, natural gas:
EIA global reserves: 7,000 TCF
Global production, annually: 140 TCF
Global demand, annually: 120
7,0000 / 200 = 35 years
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