* Qatar Petroleum (QP) has sold two cargoes of al-Shaheen crude, loading during Oct. 1-2 and Oct. 28-29, at an average discount of about 60 cents a barrel to Dubai quotes via its monthly spot tender, the lowest since May, trade sources said on Wednesday
* QP also set the October al-Shaheen crude price for term buyers at a discount of 58 cents a barrel to Dubai quotes, they said
* The buyers were probably JXTG and HMEL, they said
* Last month, QP sold two September-loading cargoes of al-Shaheen crude at an average premium of $1.46 a barrel to Dubai quotes via its monthly spot tender.
(Reporting by Shu Zhang; Editing by Clarence Fernandez) ((email@example.com; +65-6870-3549; Reuters Messaging: Twitter @shuzhang4))