CVX's Venezuelan oil shipments halted by PDVSA amid payment uncertainty due to U.S. sanctions derails its plans to export oil.

Venezuela's state oil company PDVSA has canceled several authorizations it had granted U.S.-based producer Chevron to load and export Venezuelan crude in April, three sources with knowledge of the decision said on Thursday.

This development comes after Washington cancelled key licences last month for several PDVSA partners including Chevron.