Penn West Energy announces joint venture with Japan`s Mitsubishi ...
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Rocked by accounting scandal, Penn West has now turned the corner ...
ConocoPhillips, Penn West cut over 900 oil and gas jobs ...
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Restructured Penn West proposes name change to Obsidian Energy ...
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Penn West to pay out $53 million in accounting scandal | Calgary ...
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Penn West Changes Name to Obsidian Energy Ltd. and Announces ...
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