Fluorocarbon surfactant oil-displacing system, and preparation method thereof
The technology of surfactant flooding and surfactant is applied in the field of oil flooding system and its preparation.
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Embodiment 1
[0024] Accurately weigh 1.0 g of anionic polyacrylamide (molecular weight: 15 million), 1.5 g of sodium fatty alcohol polyoxyethylene ether sulfate (m=9, n=2), fluorocarbon surfactant (m=8, n=1) ) 0.5g, add to appropriate amount of water in turn, stir slowly until each component is completely dissolved, then add water to 1000g. Take this sample, and at 80°C, it is measured that it can reduce the oil-water interfacial tension of Henan oilfield crude oil to 2.09×10 -3 mN / m, and the indoor simulation increases the recovery rate to 19.8%.
Embodiment 2
[0026] Accurately weigh 1.5 g of anionic polyacrylamide (molecular weight: 18 million), 1.0 g of sodium fatty alcohol polyoxyethylene ether sulfate (m=12, n=4), fluorocarbon surfactant (m=8, n=2) ) 0.5g, add to appropriate amount of water in turn, stir slowly until each component is completely dissolved, then add water to 1000g. Take this sample, and at 80°C, it is measured that it can reduce the oil-water interfacial tension of crude oil in Henan Oilfield to 4.17×10 -3 mN / m, the indoor simulation increases the recovery rate to 13.2%.
Embodiment 3
[0028] Accurately weigh 3g of anionic polyacrylamide (molecular weight: 15 million), 0.5g of sodium fatty alcohol polyoxyethylene ether sulfate (m=9, n=4), fluorocarbon surfactant (m=6, n=1) 2.0g, add in appropriate amount of water in turn, stir slowly until each component is completely dissolved, then add water to 1000g. Take this sample, and at 80°C, it is measured that it can reduce the oil-water interfacial tension of crude oil in Henan Oilfield to 1.73×10 -3 mN / m, the indoor simulation increases the recovery rate to 12.4%.
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