Critical Judgments and Accounting Estimates (Tables)

12 Months Ended

Dec. 31, 2017

Corporate Information And Statement Of IFRS Compliance [Abstract]

Forward commodity price estimates

Impairment tests were carried out at December 31, 2017 and were based on fair value less costs to sell calculations, using a discount rate of 10% for Canada and 15% for Egypt on future after-tax cash flows and the following forward commodity price estimates:

	Egypt1		Canada1
	Oil		Oil		Gas		Condensate		Butane		Propane		Ethane
Year	$US/Bbl		$US/Bbl		$US/Mcf		$US/Bbl		$US/Bbl		$US/Bbl		$US/Bbl
2018	53.76		54.30		1.63		58.80		38.07		31.88		4.53
2019	51.92		54.27		1.91		57.41		34.37		28.83		5.46
2020	51.41		54.98		2.21		57.81		34.70		28.70		6.45
2021	54.28		57.69		2.52		60.81		36.53		29.17		7.50
2022	57.16		60.65		2.75		63.65		38.36		29.71		8.23
Thereafter (%)2	2.0	%	2.0	%	2.0	%	2.0	%	2.0	%	2.0	%	2.0	%
1 GLJ Petroleum Consultants Ltd. (“GLJ”) price forecasts, effective December 31, 2017.
2 Percentage change represents the increase in each year after 2022 to the end of the reserve life.