ONGC’s hydrocarbon reserves during fiscal 2009/10:

The highlights bring out reserves accretion from ONGC operated domestic fields during the year, at 284.81 million tonnes of oil equivalent (MToe) in place, and at 68.90 MToe ultimate. Incidentally, these are the highest reserves accreted in the preceding 18 years.

With the annual production of 47.852 MToe, the reserve replacement ratio (RRR) works out to 1.44.