April 19 (Reuters) - Oil Search Ltd OSH.AX -
* Unit production cost guidance for year has been reduced from us$8.50-10.50/boe to us$8-10/boe
* Qtrly total production 7.57 mmboe versus 7.72 mmboe in prior quarter
* Qtrly revenue for period declined by only 1%, to us$343.7 million
* Oil Search remains on track to deliver 2017 production within 28.5 - 30.5 mmboe guidance range
* "Based on year-to-date performance, expected production costs in 2017 have been revised downwards"
* Oil search's us$500 million corporate facility expires at end of october 2017.
* Oil search has decided to expand facility to us$600 million
* Expected production costs in 2017 have been revised downwards Source text for Eikon: ID:nASXQkMc8 Further company coverage: OSH.AX