Optimization And Evaluation Of Profile Control And Flooding System In Block P In Periphery Of Changyuan

In this paper,block P is taken as the research target block.At present,there are many problems in block P in the period of ultra-high water cut development,which leads to a large gap between the actual effect of its development and expectation.for example,the injected water will infiltrate to the high level to form the phenomenon of series flow,insufficient water pressure driving power,contradictions between different levels and so on.In order to improve these problem layers,the oilfield adopts water flooding dispatching measures,but with little effect.Through the analysis of the existing problems in P block,it can be found that the gel profile control technology has high practicability in the oil equilibrium control of P block.On the basis of consulting the relevant literature,the compound ion gel profile control system matched with P block was selected from three kinds of gel profile control system through indoor simulation experiment.The indoor performance evaluation of the system,such as thermal stability,salinity,oil resistance,acid-alkali resistance and salt resistance,fluidity analysis and parameter optimization of profile control agent such as injectivity,plugging,flushing resistance,dynamic adsorption retention and dynamic shearing were carried out through indoor fluidity test.the experiment of gel system using heterogeneous core can improve 7% oil recovery.The final research results provide theoretical support for the practicability of composite ion gel profile control technology in P block.