Surfactant and oil displacing agent for oil displacement
A technology of surfactant and oil displacement agent, applied in the field of tertiary oil recovery, can solve the problems of reducing oil-water interfacial tension and emulsification and solubilization effect of heavy oil, and achieve the effects of improving crude oil recovery rate, simple preparation process and meeting environmental protection requirements.
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Embodiment 1
[0077] This embodiment provides a surfactant for oil displacement. The surfactant for oil displacement is prepared by the following method: add 1 weight part of alkanolamide and 0.2 weight part of sodium hydroxide to the reaction kettle and mix them uniformly. Replace the air in the reactor with nitrogen for 3 times, control the temperature in the reactor to 120°C, then slowly add 10 parts by weight of ethylene oxide dropwise into the reactor, control the reaction pressure to 0.2MPa, and obtain a viscous The paste was separated by silica gel column chromatography to obtain the intermediate product. Put 3 parts by weight of the intermediate product in a three-necked flask, heat the three-necked flask so that its temperature is 50°C, slowly add 4 parts by weight of a mass concentration of 95% chlorosulfonic acid solution to the three-necked flask for sulfonation reaction . Finally, 5 parts by weight of ammonia water with a mass concentration of 10% was added to the three-necked...
Embodiment 2
[0081] This embodiment provides a surfactant for oil displacement. The surfactant for oil displacement is prepared by the following method: add 5 parts by weight of alkanolamide and 3 parts by weight of sodium carbonate to the reaction kettle and mix them uniformly; Replace the air in the reactor for 3 times, control the temperature in the reactor to 120°C, then slowly add 40 parts by weight of ethylene oxide dropwise into the reactor, control the reaction pressure to 0.8MPa, and obtain a viscous paste after 4 hours of polymerization The product was separated by silica gel column chromatography to obtain an intermediate product. Place 5 parts by weight of the intermediate product in a three-necked flask, heat the three-necked flask so that its temperature is 60°C, slowly add 7 parts by weight of a chlorosulfonic acid solution with a mass concentration of 97% to the three-necked flask for sulfonation reaction . Finally, 6 parts by weight of ammonia water with a mass concentrat...
Embodiment 3
[0085] This embodiment provides a surfactant for oil displacement, which is prepared by the following method: add 10 parts by weight of alkanolamide and 5 parts by weight of sodium bicarbonate to the reaction kettle and mix them uniformly, and use Replace the air in the reactor with nitrogen for 3 times, control the temperature in the reactor to 120°C, then slowly add 100 parts by weight of ethylene oxide dropwise into the reactor, control the reaction pressure to 1.2MPa, and obtain a viscous The paste was separated by silica gel column chromatography to obtain the intermediate product. Place 7 parts by weight of the intermediate product in a three-necked flask, heat the three-necked flask so that its temperature is 80°C, and slowly add 10 parts by weight of a chlorosulfonic acid solution with a mass concentration of 98% in the three-necked flask for sulfonation reaction . Finally, 9 parts by weight of ammonia water with a mass concentration of 12% was added to the three-neck...
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