The decision to reduce debt comes as the company booked a $3.2 billion impairment charge.
As a result the miner posted a net loss of $2.6 billion for the first half this year against a profit of $226 million tweleve months ago.
The only bright spot was the company’s trading arm which posted $2 billion in earnings over the period, benefiting from the volatility in the oil and commodity markets.
Oil trading firms such as Gunvor and Mercuria have posted strong results this year, while Shell’s trading has also performed strongly.