BHP Billiton has maintained all production and unit cost guidance for the 2018 financial year.
It said good progress had been made on its latent capacity projects, with first production from the Los Colorados extension project and the Olympic Dam southern mining area achieved in the September quarter and the Caval Ridge southern circuit project progressing to plan.
It said all major projects under development were tracking to plan.
An operation review for the quarter said: 'In Onshore US, our operated rig count increased from five to nine during the September 2017 quarter.
'Divestment of a small portion of the Hawkville acreage was completed during the quarter, with work underway to exit our remaining Onshore US assets for value.
'In Petroleum exploration, evaluation of the positive drilling results from Wildling-2 is continuing, with a sidetrack also encountering oil in multiple horizons which will assist with establishing the scale of the discovery.'
At 8:22am: (LON:BLT) BHP Billiton PLC share price was +2.25p at 1417.25p