Chevron and other US energy companies are closing agreements to spend billions of dollars in Venezuela's oil resources, positioning President Trump for a victory after months of sluggish discussions.According to persons familiar with the situation, Chevron is close to reaching an agreement to expand its long-standing operations in the Latin American country, potentially adding two more heavy-oil fields to its portfolio in Venezuela. It presently has three joint ventures with PdVSA and is the only major US corporation operating in the nation.