Oct 20 (Reuters) - Oil Search Ltd OSH.AX :
* Quarterly report to 30 September 2015 OSH.AX
* Qtrly total sales 7.22 mmboe versus 7.41 mmboe last quarter
* Q3 2015 total production 7.42 mmboe versus 7.41 mmboe in Q2 2015
* Q3 2015 total revenue US$ 379.0 million versus US$ 391.5 million in Q2 2015
* Says tracking towards the upper end of our 2015 full year production guidance range of 27 - 29 mmboe
* Says guidance for 2015 full year key metrics is largely unchanged
* Says small reduction in anticipated 2015 exploration and evaluation expenditures
* 2015 business optimisation programme initiatives targeting a 15 percent-20pct reduction in controllable operating and capital unit costs from 2016 onwards
* "Aiming to increase operated Oil production by approximately 5% over current forecasts from 2016 onwards"
* Source text for Eikon ID:nASXbxrQpS