Chevron, Valero in talks to resume Venezuela oil supply to US, sources say

The volume represented about 20 per cent of Chevron's total exports of Venezuelan oil in that period, the data showed.

The supply deal is key for Chevron's second largest joint venture in Venezuela, Petroboscan in Venezuela's western region, due to limitations in storing the heavy Boscan crude produced by that project, which have forced output cuts in the past.

(Reporting by Marianna Parraga and Arathy Somasekhar, additional reporting by Sheila Dang, editing by Deepa Babington)