Study Of The Mechanism About Nano-material Improving Rheological Property Of Wormlike Micellar Fluids

Wormlike micellars which are presented by structure of three-dimensional network are shaped by gathered surfactant molecule.this paper uses six different kinds of Nano-material with disparate property to two kinds of ionic surfactant: hexadecyl trimethyl ammonium chloride(CTAC)and N-methyl oil amido ethyl sodium sulfonate(J-20)fluids.Nano-materials are dispersed in surfactant fluids by mechanical agitation and ultrasonic oscillation.The results show Nano-materials which are disposed by surface functionalization present well stability;The interactive mechanism between Tubular Nano-carbon and wormlike micellar is in-depth studied by microcosmic Freeze-etching replication transmission electron microscopy and macroscopical rheological test.The results show the moderated tubular Nano-carbon can visibly improve the viscosity and elasticity of wormlike micellar fluids.The interactive laws of p H/KCl and Nano-micellar viscoelastic fluids are confirmed by rheological test.Results show p H/KCl can visibly change the dispersed stability and viscoelasticity of the system,and the dispersed stability of the system will get bad when acidity is less than six,basicity is more than eleven and more KCl.The system will have better KCl-resistance when p H of 3%J-20 fluid tends to basicity.p H/KCl also can change visibly the viscoelasticity of Nano-micellar fluids,and the tackified effect of Nano will get well when p H of the system tends to basicity;The performance of Nano combined wormlike micellar VES-fracturing fluids is obvious superior to general VES-francturing fluids.