A kind of preparation method of active copolymer high pour point crude oil displacing agent
A technology of copolymer and oil displacement agent, which is applied in the field of preparing active copolymer high pour point crude oil oil displacement agent, can solve the problems of low recovery rate of high pour point crude oil, no ideal, etc.
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Embodiment 1
[0006] (1) Add 0.01mol α-glycidyl methacrylate and 50mL methanol into a 250mL three-necked reaction flask, stir and dissolve, heat up to 45°C, then slowly add 0.01mol rosin amine dropwise for 1 hour. Incubate the reaction for 4 hours to obtain a yellow transparent uniform liquid, which is cooled to room temperature for use;
[0007] (2) add 0.005mol N-vinylcarbazole, 0.035mol acrylamide and 10mL distilled water to the reaction flask described in the above (1), stir and dissolve, then add 0.001 gram of ammonium persulfate, stir and dissolve, pass nitrogen for 15 minutes, The temperature was raised to 70°C to initiate polymerization, which took 3 hours to obtain a yellow viscous liquid.
Embodiment 2
[0009] Accurately weigh the yellow viscous liquid prepared in Example 1(2), stir and dissolve in clear water, and prepare oil-displacing agent solutions with concentrations of 0.1%, 0.15%, 0.2% and 0.25% respectively. The viscosity of solutions of various concentrations at 0°C to 80°C was measured with a BROOKFILD DV-III+ rheometer; the results are shown in Table 1.
[0010] Table 1 Viscosity of oil-displacing agent solution at different concentrations and temperatures (mPa.s)
[0011]
Embodiment 3
[0013] The crude oil samples were 1-4# waxy dehydrated crude oil, respectively, and the freezing point was measured by DYH-201A freezing point tester (Dalian Yuhe Petroleum Instrument Co., Ltd.) according to the national standard GB / T510-83. The product prepared in Example 1 was prepared into an aqueous solution with a concentration of 0.2% for use. Take 100g of the above waxy crude oil samples respectively, add different amounts of 0.2% pharmaceutical solution, stir at 40°C for 24 hours, stand still, take the upper oil sample after separation of oil and water, and measure its freezing point. According to the above method, the freezing point of the crude oil treated with the chemical solution of 10g, 30g and 50g was measured respectively. The results are shown in Table 2, Table 3 and Table 4.
[0014] Table 2 The freezing point of different crude oils after the crude oil / agent is 100∶10
[0015]
[0016] Table 3 The freezing point of different crude oils after the crude oi...
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