1, To consider and study on further EOR methods after tertiary recovery has a very important meaning to sustainable development of oil industry.

2, Therefore, Gas injection(especially CO2) for EOR has the enormous applied potential as a gordian technique for tertiary oil recovery of low permeability oil fields.

3, Therefore, the terpolymer use in EOR flooding as the main oil displacement agent and the blocking agent will have relatively good prospect.

4, EOR is considered as an important technology for the strategic development of offshore oilfields in China.

5, Polymer flooding, as one of most important EOR technologies, has been applied industrially.

6, This paper presents foreign EOR methods and their application status, application scale, incremental oil production and its share in total oil production.

7, Now air injection into light oil for EOR has received more attention.

8, These characteristics made oil-base cement slurry have a wide application prospect in oil-stabilization and water-control, oil reservoir protection, EoR and so on.

9, Russia regards this water? drive curve as an important method for evaluating EOR effect.

10, The paper describes various reservoir applications of horizontal wells from primary recovery to EOR applications.

11, Air injection is a promising and proven technology as for EOR process.

12, In order to better recover the by - passed oil in reservoirs,(http:///EOR.html) EOR technologies that can improve both sweep efficiency and flushing efficiency are needed.

13, This paper presents the major application cases of enhanced oil recovery ( EOR ) in the former Soviet Union.

14, Such abundant remaining oil is the rich foundation of reserve and the important basis for EOR.

15, Natural gas injection miscible flooding is one of means for EOR.

16, Result shows that with proper methods, after tertiary recovery of polymer flooding, further EOR is possible. Different experimental solutions have been correlated.

17, After polymer flooding and polymer cross link micro gel flooding, the residual oil mainly distributes in middle and low permeable reservoirs. This is the potential area of EOR.

18, These properties are especially important in bioremediation, and enhanced oil recovery ( EOR ).

19, Crosslinked polymer injection is an increasingly mature technique of tertiary EOR.

20, Monitoring the content of the surfactant in the produced liquid from EOR test area is an important indication for understanding the direction of injectant and the displacement characteristics .