Oil-displacing agent, preparing method of oil-displacing agent and intensified oil production method
An oil-displacing agent and oil-displacing technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor oil-displacing efficiency of oil-displacing agents
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Embodiment 1
[0061] (1) The anionic surfactant structural formula prepared is as follows, wherein, m 1 +m 2 =12,n 1 +n 2 = 5, m 3 +m 4 =10.
[0062]
[0063] Add 325 grams (1 mole) of behenylamine and 13 grams of potassium hydroxide to a 5L pressure reactor equipped with a stirring device. When heated to 80-90°C, open the vacuum system and dehydrate under high vacuum for 1 hour, then Replace with nitrogen 3 to 4 times, adjust the reaction temperature of the system to 110°C and slowly introduce 532.4 grams (12.1 moles) of ethylene oxide, control the pressure ≤ 0.50MPa, after the completion of the reaction of ethylene oxide, slowly add ethylene oxide at 150°C Slowly feed 291.2 grams (5.02 moles) of propylene oxide, and control the pressure to ≤0.60 MPa. After the reaction of propylene oxide is completed, adjust the temperature to 140° C. and slowly introduce 444.4 grams (10.1 moles) of ethylene oxide. After the reaction was completed, the temperature was lowered to 90°C, low boilers...
Embodiment 2
[0071] (1) The anionic surfactant structural formula prepared is as follows, wherein, m 1 +m 2 =5,n 1 +n 2 =22,m 3 +m 4 =8.
[0072]
[0073] Add 199 grams (1 mole) of isomeric tridecylamine and 6.0 grams of potassium hydroxide to a 5L pressure reactor equipped with a stirring device, carry out water removal and nitrogen replacement with [Example 1], and adjust the system reaction temperature to 110 Slowly feed 222.2 grams (5.05 moles) of ethylene oxide at ℃, and control the pressure to ≤0.60 MPa. After the reaction of ethylene oxide is completed, slowly introduce 1281.8 grams (22.1 moles) of propylene oxide at 140 ° C, and control the pressure ≤0.60MPa, after the propylene oxide reaction is completed, adjust the temperature to 150°C and slowly introduce 356.4 grams (8.1 moles) of ethylene oxide. After the reaction was finished, 2016.3 grams of isotridecylamine polyoxyethylene (5) polyoxypropylene (22) polyoxyethylene (8) ether was obtained with a yield of 98.5%.
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Embodiment 3
[0080] (1) Same as [Example 2], the difference is that isomeric tridecylamine polyoxyethylene (5) polyoxypropylene (22) polyoxyethylene (8) ether does not need to be treated with acid after reacting with sodium chloroacetate, that is After 10 hours of reflux reaction, change to a distillation device, distill off the solvent benzene, add water and stir the residue evenly, and obtain a nonionic and anionic mixed surfactant S-3 containing sodium chloride and sodium hydroxide.
[0081] (2) S-3, modified polyacrylamide (P1, comonomer AM / AMPS molar ratio = 10 / 1, viscosity-average molecular weight 23 million) and Aqueous sodium bicarbonate solution was stirred for 4 hours, and all the other were the same as [Example 1] (2). The results are shown in Table 3.
[0082] (3) Carry out the oil displacement test with [Example 1] (3), and the results are shown in Table 3.
[0083] table 3
[0084]
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