Canadian Natural Resources (CNR) has reported a bigger quarterly loss due to lower prices.
The firm said cash flow from operations had fallen 33.4%.
CNR has been impacted heavily by the drop in global oil prices, but cut salaries, rather than make job losses.
The firm said average realised prices for crude oil had fallen 4.5% in the quarter and average realised prices for natural gas, before risk management, had fallen 24.2%.
Losses for the firm widened to $243.8million.
Meanwhile, oil and natural gas production fell 13.4% to 735,212 barrels of oil equivalent per day in the quarter.