Oil prices rose on Wednesday as investors assessed a temporary shutdown at two large fields in Kazakhstan, expectations of a build in U.S. crude inventories and fresh geopolitical tension tied to U.S. tariff threats in its bid to gain control of Greenland. Brent futures gained 20 cents, to $65.12 a barrel. The U.S. WTI crude contract rose 18 cents, to $60.54 a barrel.