The US independent, led by chief executive Lee Tillman, announced the major portfolio rationalisation move as part of a planned $5.9 billion investment and exploration budget for 2014 unveiled on Wednesday.

The company aims to allocate 60% of its capital spending budget – up from $5.2 billion budgeted for this year – towards its North America resource plays with plans to boost drilling work in the Eagle Ford and Bakken, as well as Oklahoma Woodford.

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