The Obama administration’s targets include OAO Rosneft, OAO Novatek, OAO Gazprombank and eight defense firms.
At 20%, BP holds the single biggest foreign investment in Russia.
Investment from energy companies is vital to Ukraine’s mission to pull away from Russian control.
The potential loosening of Russian red tape could provide enough slack for both foreign and domestic oil and gas companies to increase profits and build partnerships.
Sources say PetroChina wants a share of eastern Siberian gas fields.