Enhanced oil recovery techniques

EOR is a class of reservoir and reservoir fluids by improving the physical and chemical characteristics, enhanced oil recovery (EOR, Enhanced Oil Recovery) mining technology. Oil extraction Pellet mill can be divided into primary production, secondary and tertiary oil recovery. Primary production is the use of natural energy reservoir (ie pressure energy) carried out; secondary recovery is the use of certain technology to restore reservoir pressure for oil field development, common for water extraction; thereafter enhanced oil processing (EOR) techniques belong EOR. Currently, in addition to the Middle East, the world's major oil producing countries of the main oilfields have entered late stage of development.