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|1. (WO2017017964) NOVEL ACRYLIC ACID CROSSLINKED POLYMER AND USE THEREOF|
|Applicants:||NIPPON SHOKUBAI CO., LTD.
|Title:||NOVEL ACRYLIC ACID CROSSLINKED POLYMER AND USE THEREOF|
The present invention provides a novel acrylic acid crosslinked polymer and the use thereof. The present invention provides the acrylic acid crosslinked polymer in which the content of soluble components is 40 wt.% or higher. The present invention also provides a method for adjusting the viscosity of a fracturing fluid in a hydraulic fracturing method, the viscosity adjustment method including: A) a step of measuring the types and quantities of metal cations which are in water and which are the object of viscosity adjustment; B) a step of selecting the type and quantity of an acrylic acid crosslinked polymer on the basis of the types and quantities of metal cations and the pH so as to achieve a viscosity that is required for fracturing in a hydraulic fracturing method; and C) a step of adjusting the viscosity of the fracturing fluid using the acrylic acid crosslinked polymer of the selected type and quantity.