Iraq, China's CNPC and its partners have invited oil service companies to bid for the rehabilitation of 10 oil wells in the 4.1 billion-barrel Halfaya oilfield.

A statement posted on the state-run Maysan Oil Company's website invited bidders to provide acid stimulation services on 10 wells within a one-year period to maximize the inflow area of the wellbore in oil and gas formations.

The tender closes on September 27 and the offer stays valid for 90 days after the bid closing date.

The group also issued a tender for detailed engineering, procurement, construction, commissioning and maintenance to build a temporary oil storage and filling station at Halfaya. The tender closes on September 24.

In August, CNPC and its partners said they planned to start drilling new wells this month in the Halfaya field as part of a plan to boost output to 70,000 barrels per day in 2011 from 3,000 bpd now.

Iraq signed a contract to develop Halfaya with China National Petroleum Company (CNPC), French oil major Total and Malaysian state firm Petronas, for a fee of $1.40 per barrel. CNPC has a 37.5 percent interest in the consortium. - Reuters