Heating value of gas

# (a)

Except as provided in (c) of this section, the heating value of gas is determined by

# (1)

calculating the total or gross BTUs produced

(A) by the combustion, at constant pressure, of the amount of the gas that would occupy a volume of one cubic foot of space at a temperature of 60° Fahrenheit, when the gas is

(i) saturated with water vapor and under a pressure equivalent to that of
14.73 pounds per square inch absolute; and

(ii) under standard gravitational force with air of the same temperature and pressure as the gas; and

(B) when the products of combustion are cooled to the initial temperature of the gas and air and when the water formed by combustion is condensed to the liquid state; and

# (2)

adjusting the calculation under (1) of this subsection for the actual water content of the gas.

# (b)

The heating value of gas produced from each lease or property must be sampled and the heating value determined under (a) of this section at least once per calendar year. The most recent determination of heating value must be applied to gas produced from the lease or property on or after the date the determination is made. If the first determination of heating value in compliance with (a) of this section is made after March 31, 2007, that determination must also be applied to gas that is produced from the lease or property after March 31, 2007, but before the date that determination is made.

# (c)

For gas produced before April 1, 2007, if the heating value is not determined under (a) -

(b) of this section, the department will prescribe a reasonable method for estimating the heating value, based on the known heating value of gas produced more recently from the same reservoir or produced from a similar reservoir, an average heating value for gas produced from a type of reservoir or from an area of the state, or a standard industry practice.
(Eff. 5/3/2007, Register 182)
Statutory Authority:
Authority:
AS 43.05.080 AS 43.55.110 AS 43.55.900