The Development Evaluation Of Polymer And Surfactant Flooding

Polymer and Surfctant flooding is one of the critical EOR methods after polymer flooding.In the recent years,a large-scale polymer flooding test is carried out on Bohai oilfields,and has got very remarkable effect.In the year 2010,A oilfield developed the first time PS flooding on offshore.Compared the fruitful chemical theory and practice in Shengli and Daqing oilfield,the offshore chemical flooding has a lot to catch up.And as the short of plotform life and fresh water,the driving effect and evaluation methods are different with the inshore oilfield.We can't ignore the early water and polymer flooding stage,so this paper proposed a comprehensive PS flooding development evaluation sysem.After a full understanding of water flooding development history,we proposed a new water cut model in water flooding as to evaluate the technology measuers in development.Summarize produce and inject wells characteristic in the chemical flooding and put up three new methods to calculate the recovery of chemical flooding: the water cut method in polymer flooding,PS flooding,and the WPG curve method.In the view of the short of further water flooding after polymer flooding,we put forward the funnel of water cut method to analysis the synergistic effect on PS flooding.We break the oil increment into three levels: compared with the water flooding,the designed plan of flooding and the continue polymer flooding.Take a lot of consideration from laboratory experiment and analogy due to the not ideal effect of PS flooding.In the end,come up with the chemical mobility design methods,and the PS evaluation effect system is completed.