SELF-HEALING, LOW-DAMAGE AND ULTRA-HIGH TEMPERATURE-RESISTANT FRACTURING FLUID

摘要

Disclosed is a self-healing, low-damage and ultra-high temperature-resistant fracturing fluid, comprising the following components in mass percent: 0.4-0.8 wt% of a polymer thickening agent, 0.015-0.02 wt% of a non-metallic crosslinking agent, 0.04-0.06 wt% of a gel breaker, and the balance being water, wherein the polymer thickening agent is prepared by polymerizing acrylamide, acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, a rigid monomer, and a cationic hydrophobic monomer according to a weight ratio of 55-70:15-20:15-20:0.5-3:0.1-1.0, the polymerization temperature being 30-40°C, and the polymerization time being 8-10h. The fracturing fluid can effectively resolve the technical problem that a conventional fracturing fluid is easy to decompose at a high temperature, so that the performance of the fracturing fluid is influenced.