AN AMAZING MIRACLE: when the Tamar gas field began to operate in 2012 it had 13.2 trillion cubic feet (TCF) of natural gas. More than ten years later and after production of 3.13TCF so far, the analysts are now updating their estimates and claim that there are 13.2TCF in the remaining reserves. That means that the production of the last 10 years didn’t shrink the reserves at all!