Film-coated solid acid suitable for deep acid fracturing of carbonate reservoir
A carbonate reservoir and solid acid technology, which is applied in the direction of production fluid, drilling composition, wellbore/well components, etc., can solve the problems of corrosion inhibition and retardation, etc., and achieve corrosion inhibition Good performance, reduced reaction speed, and simple preparation process
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[0026] Example 1
[0027] A coated solid acid suitable for deep acid fracturing of carbonate reservoirs. The preparation process is as follows:
[0028] 1) Add 50g ethylene oxide, 30g hydroxyethyl methacrylate, 10g phthalimide, 10g pentaerythritol triallyl ether into an anhydrous and oxygen-free pressure bottle, and continue to add 150g benzene, 10g Diethyl zinc, seal, shake well, and let stand in a 50℃ constant temperature water bath for 70 minutes to separate the polymer from the liquid, and vacuum dry the polymer to obtain the external coating material;
[0029] 2) Dissolve 10g of the coating material in 70g of absolute ethanol to prepare a feed solution;
[0030] 3) Spray drying method is adopted to coat 30 g of material liquid on 20 g of solid hydrochloric acid to prepare a coated solid acid.
Example Embodiment
[0031] Example 2
[0032] A coated solid acid suitable for deep acid fracturing of carbonate reservoirs. The preparation process is as follows:
[0033] 1) Put 45g of ethylene oxide, 25g of hydroxyethyl methacrylate, 15g of phthalimide, 15g of pentaerythritol triallyl ether into an anhydrous and oxygen-free pressure bottle, and continue to add 150g of benzene and 10g Diethyl zinc, seal, shake well, and let stand in a 50℃ constant temperature water bath for 70 minutes to separate the polymer from the liquid, and vacuum dry the polymer to obtain the external coating material;
[0034] 2) Dissolve 10g of the coating material in 70g of absolute ethanol to prepare a feed solution;
[0035] 3) Spray drying method is adopted to coat 30 g of material liquid on 20 g of solid hydrochloric acid to prepare a coated solid acid.
Example Embodiment
[0036] Example 3
[0037] A coated solid acid suitable for deep acid fracturing of carbonate reservoirs. The preparation process is as follows:
[0038] 1) Add 50g of ethylene oxide, 30g of glycidyl methacrylate, 10g of glutarimide, and 10g of trimethylolpropane diallyl ether into an anhydrous and oxygen-free pressure bottle, and continue to add 150g Benzene, 10g diethyl zinc, seal, shake well, and let stand in a 50℃ constant temperature water bath for 70 minutes, separate the generated polymer from the liquid, and vacuum dry the polymer to obtain the external coating material;
[0039] 2) Dissolve 10g of the coating material in 70g of absolute ethanol to prepare a feed solution;
[0040] 3) Spray drying method is adopted to coat 30 g of material liquid on 20 g of solid hydrochloric acid to prepare a coated solid acid.
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