Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contracts with Customers [Abstract]

Disaggregation of Revenue

		Three Months Ended		Six Months Ended
		June 30,		June 30,
(Thousands of dollars)		2018	2017	2018	2017
Net crude oil and condensate revenue
United States – Onshore	$	198,823	143,684	381,472	293,671
– Offshore		94,393	47,669	165,922	101,481
Canada    – Onshore		28,425	11,658	49,719	20,778
– Offshore		48,316	38,863	102,631	75,877
Malaysia – Sarawak		85,596	59,758	162,902	125,542
– Block K		101,609	76,741	196,181	164,572
Total crude oil and condensate revenue		557,162	378,373	1,058,827	781,921
Net natural gas liquids revenue
United States – Onshore		13,236	9,077	25,370	18,724
– Offshore		2,920	1,209	4,559	3,125
Canada    – Onshore		3,448	881	6,916	1,313
Malaysia – Sarawak		4,002	3,358	10,193	8,541
Total natural gas liquids revenue		23,606	14,525	47,038	31,703
Net natural gas revenue
United States – Onshore		6,291	8,006	13,062	15,041
– Offshore		2,826	2,718	5,762	5,381
Canada    – Onshore		28,089	37,951	67,683	77,798
Malaysia – Sarawak		36,997	35,829	69,380	74,418
– Block K		179	158	352	333
Total natural gas revenue		74,382	84,662	156,239	172,971
Total revenue from contracts with customers		655,150	477,560	1,262,104	986,595
Gain (loss) on crude contracts		(37,624)	26,861	(67,126)	63,938
Other operating income (loss)		448	5,191	8,939	3,738
Gain (loss) on sale of assets		220	(1,333)	(118)	130,648
Total revenue	$	618,194	508,279	1,203,799	1,184,919

Current Long-Term Contracts Outstanding

Current Long-Term Contracts Outstanding at June 30, 2018
Location	Commodity	End Date	Description	Approximate Volumes
U.S. Onshore	Oil	Q2 2019	Fixed quantity delivery in Eagle Ford	4,000 BOE/Day
U.S. Onshore	Oil	Q3 2019	Fixed quantity delivery in Eagle Ford	2,000 BOE/Day
U.S. Onshore	Oil	Q4 2021	Fixed quantity delivery in Eagle Ford	2018: 19,000 BOE/Day 2019-2021: 13,000 BOE/Day
U.S. Onshore	Gas and NGL	Q2 2026	Deliveries from dedicated acreage in    Eagle Ford	As produced
Canada Onshore	Gas	Q4 2020	Contracts to sell natural gas at Alberta AECO Cdn dollar 2.81/MCF	59 MMCF/Day
Canada Onshore	Gas	Q4 2020	Contracts to sell natural gas at USD Index pricing	60 MMCF/Day
Canada Onshore	Gas	Q4 2024	Contracts to sell natural gas at USD Index pricing	30 MMCF/Day
Canada Onshore	Gas	Q4 2026	Contracts to sell natural gas at USD Index pricing	38 MMCF/Day