Method for preparing high temperature retarding-type organic boron zirconium cross linking agent
A cross-linking agent and organic technology, which is applied in the field of preparation of high-temperature retarded organoboron-zirconium cross-linking agent, can solve the problems of fracturing fluid increase residue, reduce friction, increase cost, etc., and improve fracturing effect , the effect of improving the diversion capacity and improving the production capacity
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Embodiment 1
[0015] 1) Prepare a composite solvent: mix glycerol and water in a mass ratio of 1:3, and stir to obtain a composite solvent;
[0016] 2) Add 74 parts of composite solvent and 2 parts of zirconium tetrachloride to a clean flask in parts by mass, stir until completely dissolved, then add 13 parts of boric acid, and react at 60°C for 40 minutes to obtain a mixture;
[0017] 3) Add 13 parts of sorbitol, 4 parts of triethanolamine and 0.1 part of EDTA-2Na to the mixture obtained in step 2), raise the temperature to 80° C., and react for 4 hours;
[0018] 4) Adjust the pH to 7 with NaOH aqueous solution to obtain an organoboron-zirconium crosslinking agent.
[0019] After testing, the delayed crosslinking time and temperature resistance of the jelly obtained by crosslinking the organic boron zirconium crosslinking agent prepared in this example with 100mL0.5% guar gum aqueous solution at a concentration of 0.3% are as follows:
[0020]
Embodiment 2
[0022] 1) Prepare composite solvent: mix glycerol and water in a mass ratio of 1:5, and stir to obtain a composite solvent;
[0023] 2) Add 76 parts of composite solvent and 3 parts of zirconium oxychloride to a clean flask in parts by mass, stir until completely dissolved, then add 11 parts of borax, and react at 60°C for 60 minutes to obtain a mixture;
[0024] 3) Add 12 parts of mannitol, 4.3 parts of triethanolamine and 0.2 parts of EDTA-2Na to the mixture obtained in step 2), raise the temperature to 80° C., and react for 5 hours;
[0025] 4) Adjust the pH to 8 with NaOH aqueous solution to obtain an organoboron-zirconium crosslinking agent.
[0026] After testing, the delayed crosslinking time and temperature resistance of the jelly obtained by crosslinking the organoboron zirconium crosslinking agent prepared in this example with 100mL0.4% guar gum aqueous solution at a concentration of 0.3% are as follows:
[0027]
Embodiment 3
[0029] 1) Prepare a composite solvent: mix glycerol and water in a mass ratio of 1:4, and stir to obtain a composite solvent;
[0030] 2) Add 80 parts of composite solvent and 1 part of zirconium tetrachloride to a clean flask in parts by mass, stir until completely dissolved, then add 15 parts of a mixture of boron compound boric acid and borax, and react at 60°C 30min to get the mixture;
[0031] 3) Add 14 parts of sorbitol, 4.5 parts of triethanolamine and 0.15 parts of EDTA-2Na to the mixture obtained in step 2), raise the temperature to 80° C., and react for 4.5 hours;
[0032] 4) Adjust the pH to 9 with NaOH aqueous solution to obtain an organoboron-zirconium crosslinking agent.
[0033] After testing, the delayed crosslinking time and temperature resistance of the jelly obtained by crosslinking the organoboron zirconium crosslinking agent prepared in this example with 100mL0.35% guar gum aqueous solution at a concentration of 0.3% are as follows:
[0034]
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