A oil transportation by boat against water flow / oil storing in the middle of the river journey / oil transportation by boat following water flow.
B oil transportation by boat following water flow / oil storing in the middle of the river journey / oil transportation by boat against water flow.
C oil exploration and production / oil processing, storing, transporting and marketing / oil operations after the production phase through to the point of sale.
D oil exploration and production / oil operations after the production phase through to the point of sale / oil processing, storing, transporting and marketing.
E oil processing, storing, transporting and marketing / oil exploration and production / oil operations after the production phase through to the point of sale.