Fiber structure stabilizer for fracturing and method for preparing the same

Abstract

The present application relates to the technical field of stabilizer in oilfield operation, in particular to a kind of fiber structure stabilizer for fracturing and a preparation method thereof, nitrogen-doped modified graphene oxide in the present application is realized nitrogen atom doping by the compounding of chitosan and graphene oxide and high-temperature heat treatment, both the high specific surface area and mechanical strength characteristics of graphene are retained, and active sites are introduced by nitrogen doping, the adsorption and combination capacity with fiber network is enhanced, three-dimensional support skeleton is formed in fracturing fluid, effectively resist formation pressure impact, prevent fiber structure collapse;Secondly, crosslinking modified cellulose forms network structure by epoxy chloropropane crosslinking, which can significantly improve the temperature resistance and salt tolerance of cellulose, the modified cellulose molecular chain not only maintains the dispersion characteristics of hydrophilic carboxyl group, but also introduces hydrophobic interaction through tertiary amine group, forming a double stabilizing mechanism of hydration layer and hydrophobic microzone in fracturing fluid, enhancing the shear resistance of fiber bundle.

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