Water-blocking and oil permeable proppant and preparation method thereof
A proppant and oil-permeable technology, which is applied in chemical instruments and methods, earthwork drilling, and production fluids, etc., to achieve the effects of strong artificial fracture conductivity, reduced settlement, and cost savings
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Embodiment 1
[0026] 1) Preparation of hydrophobic polymer: add 6% 2-acrylamido-2-methylpropanesulfonic acid in the reaction vessel, dissolve 10% acrylamide in water, and use Na 2 CO 3 Adjust the pH value of the solution to 6-8, place it in a constant temperature water bath at 75°C, add 0.05% ammonium persulfate as an initiator through 1kg of nitrogen gas, seal the seal after passing through 0.8kg of nitrogen gas, react in a constant temperature water bath at 75°C for 6 hours, and then cool down to obtain transparency. Viscous hydrophobic polymer.
[0027] 2) Soak the proppant with 5% hydrochloric acid solution for 8 hours, collect the proppant, rinse it with water three times, and dry it at 120°C for 24 hours.
[0028] 3) Dilute the prepared hydrophobic polymer 5 times with organic solvent ethanol, mix it with the proppant treated in step 2), stir evenly, soak at normal temperature and pressure for 4 hours, collect the proppant, and then bake it at 70°C for 8 hours , so that the hydropho...
Embodiment 2
[0031] 1) Preparation of hydrophobic polymer: add 5% 2-acrylamido-2-methylpropanesulfonic acid in the reaction vessel, dissolve 12% acrylamide in water, and use Na 2 CO 3 Adjust the pH value of the solution to 6-8, place it in a constant temperature water bath at 75°C, add 0.05% ammonium persulfate as an initiator through 1kg of nitrogen gas, seal the seal after passing through 0.8kg of nitrogen gas, react in a constant temperature water bath at 75°C for 6 hours, and then cool down to obtain transparency. Viscous hydrophobic polymer.
[0032] 2) Soak the proppant with 8% hydrochloric acid solution for 5 hours, collect the proppant, rinse it with water three times, and dry it at 120°C for 24 hours.
[0033] 3) Dilute the prepared hydrophobic polymer 5 times with the organic solvent acetone, mix it with the proppant treated in step 2), stir evenly, soak at normal temperature and pressure for 8 hours, collect the proppant, and then bake it at 70°C for 8 hours , so that the hydr...
Embodiment 3
[0036] 1) Preparation of hydrophobic polymer: add 8% 2-acrylamido-2-methylpropanesulfonic acid in the reaction vessel, dissolve 15% acrylamide in water, and use Na 2 CO 3 Adjust the pH value of the solution to 6-8, place it in a water bath with constant temperature at 75°C, add 0.1% ammonium persulfate as an initiator through 1kg of nitrogen gas, seal the seal after passing through 0.8kg of nitrogen gas, react in a constant temperature water bath at 75°C for 6 hours, and then cool down to obtain transparency. Viscous hydrophobic polymer.
[0037] 2) Soak the proppant with 10% hydrochloric acid solution for 6 hours, collect the proppant, rinse it with water three times, and dry it at 120°C for 24 hours.
[0038] 3) Dilute the prepared hydrophobic polymer 5 times with organic solvent ethanol, mix it with the proppant treated in step 2), stir evenly, soak at normal temperature and pressure for 8 hours, collect the proppant, and then bake it at 70°C for 8 hours , so that the hyd...
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