The Experimental Evaluation Of A New Crosslinked Acid Fracturing Fluid System

Crosslinked acid, with characteristics of high viscosity, low filtration, low acid-rock reaction rate, effective proppant-carrying capacity, easy gel breaking and low damage, is widely applied in the stimulation of oil and gas, no matter in carbonate reservoirs or sandstone reservoirs, even in volcanic reservoirs. Through evaluating rheology, proppant-carrying capacity, corrosion inhibition and gel breaking property in the lab, a new crosslinked acid with excellent temperature tolerance, shear resistance, proppant-carrying capacity, corrosion inhibition and retarding property has been selected. The gel breaking liquid of the system has the features of no residue, low viscosity and surface tension at the 60 degrees C. Besides, the gel breaking liquid leads lower damages to the core and can increase the permeability by 30% largely.