Oil Search Ltd. (OSH.AU) on Tuesday booked a stronger annual profit owing to higher oil prices, and said its US$15.7 billion PNG LNG venture with ExxonMobil Corp. (XOM) could know by the end of 2012 if it has enough gas for an expansion.

Oil Search's net profit for the year to Dec.31 rose by 9% to US$202.5 million from US$185.6 million.

Excluding a previously announced US$33.2 million impairment charge on an oil block in Kurdistan, net profit rose to US$235.7 million from US$144.1 million, beating the US$228.4 million average of eight analyst forecasts compiled by Dow Jones Newswires.

Exxon, Oil Search and other partners including Australia's Santos Ltd. (STO.AU) already have enough gas to underpin construction of the foundation stage of PNG LNG, which is expected to ship its first cargoes of liquefied natural gas to Asian customers in 2014.

As anticipated by some analysts, Oil Search said Tuesday that initial Hides exploration drilling to support a possible expansion of the project has been pushed back until mid-2012, from an original timetable of the end of the first quarter.

"A preliminary view on whether enough gas is available to underwrite an expansion or whether additional activities are required is likely to be formed in late 2012/early 2013," Oil Search Chief Executive Peter Botten said in a statement.

Another well that could factor into the expansion effort, P'nyang, is currently drilling and will be immediately followed by another, Trapia.

Oil Search also has extensive gas prospects in the Gulf of Papua, which it hopes could support construction of another gas-export venture. It intends to drill its first well there in the last quarter of 2012.

"Oil Search has received strong interest in participating in this programme from a number of major companies with LNG development experience," Botten said, without naming any companies.

-By Ross Kelly, Dow Jones Newswires; 61-2-8272-4692; Ross.Kelly@dowjones.com

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