Commodity Price Risk Activities (Tables)

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Transactions Outstanding

The following table summarizes Lonestar's commodity derivative contracts as of December 31, 2018:



	Contract			Volume Hedged	Weighted
Commodity	Type	Period	Range ⁽¹⁾	(Bbls/Mcf per day)	Average Price
Oil – WTI	Swaps	Jan - Dec 2019	$48.04 - $69.56	6,000	$	53.88
Oil – Argus WTI⁽²⁾	Basis Swaps	Jan - Dec 2019	5.00 - 5.55	6,000	5.05
Oil – WTI	Swaps	Jan - June 2020	48.90 - 65.56	2,592	55.70
Oil - WTI	Swaps	July - Dec 2020	55.06 - 65.56	2,765	58.15
Natural Gas - Henry Hub	Swaps	Jan - Mar 2019	3.24 - 4.41	15,000	3.78
Natural Gas - Henry Hub	Swaps	Oct - Dec 2019	2.78 - 2.98	15,000	2.87

(1) Ranges presented for fixed-price swaps and basis swaps represent the lowest and highest fixed prices of all open contracts for the period presented.

(2) Basis swap contracts establish a fixed amount for the differential between Argus WTI and Argus LLS prices on a trade-month basis for the period indicated.