Sheikh Mansour is currently undeveloped while Tishrin is currently producing 6,000 bopd through a central production facility.
Tanganyika said the two fields could contain as much as 700 million barrels of oil in place.
“We are very pleased to add these two new great projects to our portfolio,” Tanganyika chairman Lukas Lundin said.
“With Tishrin, Sheik Mansour and Oudeh, combined oil in place is now estimated to be well over 3 billion barrels.
“We plan to commence an aggressive development program immediately upon ratification of the Production Sharing Agreement by the Syrian Government and continue our success in Syria. The fields offer enormous upside for the company and jumpstarts our growth as an oil producer.”