Apache has reported a loss of $5.6billion in its second quarter results.
The company said the figure includes an after-tax ceiling test write down of $3.7billion resulting from low commodity-price levels and $1.9billion of other items.
Apache said despite the losses it expects to increase its production guidance for 2015.
Energy producer ConocoPhillips has reported a loss to its income during the second quarter of 2015.
The company said its income was $179million in comparison with a profit of $2.08billion a year earlier.
ConocoPhillips was the first major oil producer to announce spending cuts after prices began to fall last year.
