36 results about "Carboxymethyl guar gum" patented technology

The invention discloses a low-concentration carboxymethyl fracturing fluid and a preparation method thereof. At present, a hydraulic fracturing mode is adopted for reconstructing a reservoir bed, but a fracturing fluid system has high gel breaking residue content; when the reservoir bed is reconstructed, the using amount of a gel breaking agent is high, and the average increment reaches about 0.03 percent; after the fracturing fluid is subjected to gel breakage at formation temperature and flow-back fluid reaches ground, a certain cross-linking back condition exists due to reduction in temperature. The fracturing fluid consists of 96.15-98.85 parts of water, 0.25-0.3 part of carboxymethyl guar gum, 0.15-0.25 part of JL-11 cross-linking agent, 0.30-1.0 part of surfactant, 0.20-1.0 part of clay stabilizer, 0.05-0.5 part of bactericide and 0.2-0.8 part of temperature-resistant intensifier. Prepared solution A and L-11 cross-linking agent are mixed according to a volumetric ratio of 100:0.15-100:0.25 to form the fracturing fluid. In the water-based fracturing fluid cross-linked under an alkaline condition, due to low concentration of a thickening agent, low gel breakage residue and high flow guide capacity, the damage caused to the reservoir bed by the fracturing fluid is reduced, and production increasing and reconstruction effects are improved.