A kind of inverse emulsion self-crosslinking type profile control and water shutoff agent and preparation method thereof
A profile control water plugging agent, inverse emulsion technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as inability to block high-permeability holes, decrease in mechanical strength, and affect the effect of water removal.
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Embodiment 1
[0033] Add 1600 parts of white oil, 380 g sorbitan monostearate, 200 g polyoxyethylene sorbitan monostearate in the reactor, stir until uniformly mixed, control the temperature of the reactor to be 25°C, The stirring speed is 300r / min. In another reaction kettle, add 890g of water, 930g of acrylamide, 300g of dimethyl diallyl ammonium chloride, 1.2g of disodium edetate, 12g of thiourea, and 4.6g of Ammonium persulfate, 10g polyethyleneimine, stir and dissolve evenly as the water phase, dissolve 3.5g sodium sulfite in 30g water for later use, slowly add 2147.8g water phase to the oil phase in the reactor, stir until emulsified evenly, and pass nitrogen gas for 30min , add 33.5g of sodium sulfite aqueous solution, the temperature rises to 60 ° C, after 4 hours of heat preservation reaction, then lower the temperature to 25 ° C, and discharge to obtain an inverse emulsion self-crosslinking profile control and water shutoff agent.
Embodiment 2
[0035] Add 1800g of kerosene, 400g of sorbitan monooleate, and 200g of polyoxyethylene sorbitan monooleate into the reactor and stir until evenly mixed. The temperature of the reactor is controlled to be 25°C, and the stirring speed is 300r / min. In another reaction kettle, add 800g water, 1000g acrylamide, 500g acryloyloxyethyltrimethylammonium chloride, 2g disodium edetate, 20g thiourea, 5g potassium persulfate, 12g polyethylene Amine, stir and dissolve evenly as the water phase, dissolve 4g of sodium bisulfite in 30g of water for later use, slowly add 2329g of the water phase into the oil phase in the reaction kettle, stir until the emulsification is uniform, pass nitrogen for 30min, add 34g of sodium bisulfite For the aqueous solution, the temperature is raised to 70°C, and after 4 hours of heat preservation reaction, the temperature is then lowered to 25°C, and the inverse emulsion self-crosslinking profile control and water shutoff agent is obtained from the discharge.
Embodiment 3
[0037]Add 1400g of cyclohexane, 280g of glyceryl monostearate, and 140g of polyoxyethylene sorbitan monolaurate into the reactor and stir until evenly mixed. The temperature of the reactor is controlled to be 25°C, and the stirring speed is 300r / min. In another reaction kettle, add 800g water, 1000g acrylamide, 400g triethylallyl ammonium chloride, 2g disodium edetate, 15g thiourea, 5g sodium persulfate, 12g resorcinol, 6g of hexamethylenetetramine was stirred and dissolved evenly as the water phase, 4g of potassium sulfite was dissolved in 30g of water for later use, 2235g of the water phase was slowly added to the oil phase in the reaction kettle, stirred until the emulsification was uniform, nitrogen gas was passed for 30 minutes, and 34g of Potassium sulfite aqueous solution, the temperature rises to 65°C, heat-retains for 6 hours, then cools down to 25°C, and discharges to obtain a self-crosslinking profile control and water shutoff agent for reverse phase emulsion.
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