This program makes a straightforward volume
calculation for recoverable oil. Pay attention
to the units: if you enter the pay zone thickness
in meters and the drainage area in hectares then
the oil recovery will be given in cubic meters
per hectare*meter and the reserve in cubic meters.
If you use feet and acres, then the oil recovery
will be in barrels per acre*foot, and the reserve
will be in Mbarrels (thousands of barrels).