Share capital (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure Of Share capital [Abstract]

Disclosure of issued share capital [text block]

Issued share capital	2018		2017
Common stock (amounts in US$ ‘000)		60		61
The share capital is distributed as follows:
Common shares, of nominal US$ 0.001		60,483,447		60,596,219
Total common shares in issue		60,483,447		60,596,219
Authorized share capital
US$ per share		0.001		0.001
Number of common shares (US$ 0.001 each)		5,171,949,000		5,171,949,000
Amount in US$		5,171,949		5,171,949

Disclosure of detailed information about common shares [text block]

GeoPark common shares history	Date	Shares issued (millions)			Shares closing (millions)		US$(`000) Closing
Shares outstanding at the end of 2016						59.9		60
Stock awards	Jan 2017		0.1			60.0		60
Stock awards	Dec 2017		0.1			60.1		60
Stock awards	Dec 2017		0.5			60.6		61
Shares outstanding at the end of 2017						60.6		61
Stock awards	Dec 2018		0.1			60.7		61
Buyback program	Dec 2018		(0.2	)		60.5		60
Shares outstanding at the end of 2018						60.5		60