Nano emulsion injection stimulation agent for oil field water injection, preparation method thereof and oil field water injection system
A technology of nanoemulsion and oilfield water injection, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as limited contact area and poor formation wetting ability, achieve good mixing performance, reduce water injection pressure, and reduce thickness Effect
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Example Embodiment
[0023] Example 1
[0024] The nanoemulsion enhancer for oil field water injection of this embodiment is composed of the following components in mass percentage: non-polar oil phase 4.3%, nonionic surfactant 34.7%, zwitterionic surfactant 22%, anionic surfactant 22%, the balance is water.
[0025] The non-polar oil phase is a long-chain alcohol, the long-chain alcohol is n-octanol; the non-ionic surfactant is fatty alcohol polyoxyethylene ether AEO20, corresponding to RO(CH 2 CH 2 O) x In the general structural formula of H, R is an alkyl group with 12 carbon atoms and x is 20); the zwitterionic surfactant is cocamidopropyl betaine; the anionic surfactant is petroleum sulfonate .
[0026] The preparation method of the nanoemulsion enhancer for oilfield water injection of this embodiment includes: weighing 8.00g fatty alcohol polyoxyethylene ether AEO20, 4.00g petroleum sulfonate, 5.00g cocamidopropyl betaine and 5.50g water In a beaker, stir the system at 200 rpm for 30 minutes on a...
Example Embodiment
[0028] Example 2
[0029] The nanoemulsion enhancer for oilfield water injection of this embodiment is composed of the following components in mass percentage: non-polar oil phase 4%, nonionic surfactant 35.3%, zwitterionic surfactant 13.2%, anionic surfactant 7%, the balance is water.
[0030] The non-polar oil phase is a long-chain alcohol, the long-chain alcohol is n-hexanol; the non-ionic surfactant is a fatty alcohol polyoxyethylene ether AEO9, corresponding to RO(CH 2 CH 2 O) In the general structural formula of xH, R is an alkyl group with 10 carbon atoms and x is 9); the zwitterionic surfactant is lauramide propyl betaine; the anionic surfactant is dodecane Sodium benzene sulfonate.
[0031] The preparation method of the nanoemulsion enhancer for oil field water injection of this embodiment includes: weighing 12.00g fatty alcohol polyoxyethylene ether AEO9, 2.50g sodium dodecylbenzene sulfonate, 4.50g lauramide propyl betaine and Put 13.50g of water in a beaker, stir on a m...
Example Embodiment
[0033] Example 3
[0034] The composition of the nanoemulsion enhancer for oilfield water injection of this example is basically the same as that of Example 1, except that the non-polar oil phase is n-stearyl alcohol.
[0035] The preparation method of the nanoemulsion enhancer for oilfield water injection in this example is the same as that of Example 1. The ZetaPlus of Brookhaven Instrument Company of the United States was used to measure the droplet size of the nanoemulsion, and the average particle size of the prepared nanoemulsion was 89.61nm.
[0036] The oilfield water injection system of this embodiment is prepared by adding water to the nanoemulsion enhancer of this embodiment, with a mass concentration of 0.1%; the preparation water is the on-site injection water of Honghe Oilfield.
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