Key Takeaways Chevron seeks to focus on petrochemicals and heavy oil upgrading in Korea.GS Caltex's Yeosu refinery processes 800,000 barrels daily.CVX looks to allocate capital to high-return, balanced global assets.Chevron Corporation (CVX) , one of the world’s leading integrated oil and gas companies, wants a well-balanced mix of refineries. As per CVX, in some regions, like Korea, the focus of the existing investments will be on petrochemicals and upgrading heavy oil to higher-value products.Chevron's Pe ...