The supporting technologies of chemical flooding such as reservoir engineering

flooding agent and surface engineering have been formed in Henan Oilfield. The industrial application has been carried out in 26 units and which include Class I and II reservoirs and develop towards Class Ⅲ reservoirs by chemical flooding. It experiences the application of polymer flooding

compound flooding and heterogeneous flooding

which becomes the main technologies for stabilizing production or delaying production decline. With the comprehensive utilization of high-quality resources

it is faced with the challenges of lack of high-quality chemical flooding resources

the decline of chemical flooding project benefits

and the development and innovation of chemical flooding technology. Therefore

the countermeasures are to ensure the foundation

adjust the technology route

strengthen the technical research

deepen the injection-production process support

research and develop the matching skid-mounted surface polymer injection system

optimize the oil displacement agent with high cost performance

reduce the investment

promote the efficiency of chemical flooding

and improve the utilization rate of chemical flooding reserves

so as to achieve the orderly connection of chemical flooding reserves