Shell (SHEL) unit BG International has sold participating interests in three exploration blocks offshore Uruguay to QatarEnergy, which made the announcement Wednesday.

QatarEnergy bought an 18% interest in block OFF-4, with Shell holding 32% and operator APA (APA) accounting for the rest.

QatarEnergy has also acquired a 30% stake in block OFF-2, which is operated by Shell with a 70% interest.

QatarEnergy purchased a 30% stake in block OFF-7, with operator Shell retaining a 40% share. Chevron (CVX) holds the remaining 30%, QatarEnergy said.