High polymer fracturing liquid and preparation thereof

Abstract

A polymer fracturing liquid is composed of PAM 0.1-0.4%, chrome acetate 0.05-0.4%, acetic acid 0-1.0%, formate 0.3-3.0%, ClO20.1-3.0%, polyoxyethylene alxylphenol other 0-0.5%, KCl2 0-2.0%, NaOH0.9-10.0%, ammonium persulfate 0.2-10.0% and balanced with water. The process includes: first preparing the base liquid, then preparing the cross linkage liquid, and last preparing the fracturing liquid. The production cost little and the process is simple. It can be used for the hypotonic and the hyperosmotic oil phase. The residue ratio is little than 50mg / L-10mg / L.

Description

technical field [0001] The invention relates to a fracturing fluid for oil exploitation and a preparation method thereof, which is a polymer fracturing fluid and a preparation method thereof. Background technique [0002] The fracturing fluid currently used in the oil field is obtained from natural plant gums, and its main disadvantage is that the prepared fracturing fluid residue is as high as 400 to 600 mg / liter, and this high residue fracturing fluid damages the oil layer and damages the oil layer. affect the fracturing effect. Contents of the invention [0003] The invention provides a high polymer fracturing fluid which overcomes the deficiencies of the prior art and has the effects of low residue rate and reduced or even no damage to the oil layer. [0004] One of the technical solutions of the present invention is achieved in this way: a high polymer fracturing fluid, which consists of: 0.1% to 0.4% polyacrylamide, 0.05% to 0.4% chromium acetate or / and Zirconium a...

AI Technical Summary

Problems solved by technology

[0002] The fracturing fluid currently used in the oil field is obtained from natural plant gums, and its main disadvantage is that the prepared fracturing fluid residue is as high as 400 to 600 mg / liter, and this high residue fracturing fluid damages the oil layer and damages the oil layer. Affect the fracturing effect