Post Trip Fuel Calculation
Gas that enters the wellbore when the mud pump is shut down and pipe is being pulled from the wellbore is termed as Trip Fuel/Gas. The gas may enter because of the reduction in bottom hole pressure when the pump is shut down, because of swabbing, or because of both. Avgas (100-130 or 100-130LL) weight is calculated at 6 pounds per gallon; Jet A (jet fuel) at 6.84 pounds per gallon. The weights are accepted averages based on specific gravity and other variables, such as temperature and additives due to climate.
Aviation Gasoline weight per gallon(gw)=6.00
Jet A weight per gallon(dw)=6.84
Total Capacity (AvGas) Fuel Load Weight=(Fuel weight)* (gw)
Calculated Fuel Ramaining=(st)-((tt)*(gph))
Beginning Fuel Load=Fuel weight*Tank
Current fuel load=Fuel weight-calculated fuel;