| With the continuous development of oilfield EOR technology,the high concentration polymer flooding and asp flooding development scale expanding year by year,because of the tertiary oil recovery of extraction complex wastewater in the chemical composition,processing difficulties,the depth of technology makes it difficult to get into a qualified sewage treatment "deep water",water drive only as ordinary high permeable layer reinjection sewage.To alleviate the lack depth of water injection,containing poly sewage treatment difficult contradiction,by conducting water dilute polymer for polymer flooding,feasibility study,on the premise of guarantee the polymer injection system qualified,by containing poly sewage processing,to determine the feasibility of wastewater dilute polymer for polymer flooding.Indoor research thinks,salinity,fungi,and reducing substances in sewage is in sewage with the main factors of viscous loss is too big,and the concentration of sewage containing poly,oil content,suspended solids content on the viscosity of dilute polymer impact is not big.After a great deal of analysis and experiment,the screening of a variety of physical and chemical methods to process the wastewater of microorganism and reducing agents,eventually think sewage oxygen exposure method is one of the most economic and reasonable method.By sterilization,exposure to oxygen process to reduce under the condition of fungi and reducing substances content in the sewage,can consider to use poly sewage polymer injection allocation.Depth in this article,through comparative analysis of polymer flooding sewage and sewage water quality differences,find out polymer flooding sewage dilution affect viscosity of the polymers with various factors,and identify the main factors,by adopting relevant form a complete set of processing technology for processing,ensure injection viscosity reach qualified injection indicators,to determine the feasibility of wastewater dilute polymer for polymer flooding. |
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