Saudi Arabia and Iraq are set to supply full contracted volumes of crude to several Asian refiners next month.
The move comes despite commitments to reduce output under a deal signed last week by members of OPEC.
According to reports, the top two producers in Opec are looking to defend market share in the fastest growing region for oil demand, even as the cartel battles a festering supply glut that has hit global prices hard.
Earlier today Kazakhstan said it would be willing to keep output at levels the country attained last month.
Opec members are meeting with non-Opec countries at talks in Vienna today.