Oct 17 (Reuters) - Oil Search Ltd OSH.AX
* Total qtrly sales 8.19 MMBOE versus 6.96 MMBOE in previous quarter
* Qtrly production 7.91 MMBOE versus 7.2 MMBOE in the previous quarter
* Qtrly total revenue $380.8 million versus $332.5 million in the previous quarter
* Production guidance for 2017 full year remains unchanged
* FY production costs guidance updated to $8.50 - $9.50 per BOE from $8.00 -$9.50 per BOE
* Fy capital cost guidance reduced to between $295 million and $340 million from between $350 million and $400 million