SINGAPORE - Qatar Petroleum has set the October official selling prices (OSP) for its Qatar Marine crude at 75 cents a barrel below the average of Platts Oman and Dubai quotes, down $1.35 from the previous month, according to a pricing document reviewed by Reuters on Friday.

The October OSP for Qatar Land crude was set at 90 cents a barrel below the Platts Oman/Dubai average, down $1.40 from the previous month, the document showed.

(Reporting By Shu Zhang; Editing by Christian Schmollinger) ((shu.zhang@thomsonreuters.com; +65-6870-3549; Reuters Messaging: Twitter @shuzhang4))