A Study On Rheology Behavior Of Produced Liquid From ASP Flooding With Associating Polymer

Since 1996,the main reservoir of Daqing oil field has gradually come into the stage of polymer flooding,and has achieved a high recovery ratio.However,there is still over 50 percent oil staying in oil reservoir after the polymer flooding.Compared with PAM,associating polymer solution has better tolerance of high shear rate,temperature,and high salinity in its application.Moreover,in order to achieve the same viscosity,the dosage of associating polymer is 50% ~ 70% lower than PAM in the ASP system.Nowadays,to develop the recovery ratio,Daqing oil field has begin the ASP flooding field experiment after polymer flooding.In this thesis,physical properties and rheological properties of ASP flooding produced fluid of associating water-soluble polymer has been studied to achieve the characteristic parameters of the ASP produced fluid system.It has great importance to guide the adjustment and design of the storage and transportation engineering,also to improve the economic benefits of oilfield.In this paper,the physical properties and rheological properties of crude oil and ASP flooding produced fluid has been studied.To compare properties of ASP flooding produced fluid with PAM and HAWSP,the oil sample we selected is from the same oil layer of adjoining blocks.Using the method of fielding sampling and laboratory preparation,the rheological properties of ASP flooding produced fluid with associating polymer were studied.Then,the effects of different moisture content,temperature,shear rate and concentration of the polymer were analyzed.After studying the experimental dates,we can achieve new constitutive equations of ASP flooding produced fluid with associating polymer,and the viscosity prediction model can be evaluated.