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发明授权
CN106893571B 一种水包油乳状液驱油剂 失效 - 权利终止

一种水包油乳状液驱油剂
摘要：
本发明公开了一种水包油乳状液驱油剂，用于原油化学驱提高采收率。所述的水包油乳状液驱油剂由占总重量1‑5％的纳米二氧化硅溶胶、占总重量0.02‑0.2％的十八烷基二甲基氧化胺、占总重量5‑10％的5号白油和余量水混合而成，其中纳米二氧化硅溶胶的粒径为7‑12nm，各组分的重量百分含量之和为100％。加入纳米二氧化硅强化了水包油乳状液的粘度和稳定性，该乳状液既可以提高化学驱的洗油效率，又提高了波及系数，作为三次采油用的驱油剂，可以在水驱基础上提高采收率30％以上。
摘要（英）：

The invention discloses an oil-in-water emulsion oil displacement agent for crude oil chemical flooding for recovery efficiency improvement. The oil-in-water emulsion oil displacement agent is prepared from, by weight, 1-5 % of nano silica sol, 0.02-0.2% of octadecyl dimethylamine, 5-10% of 5 # white oil and the balance water and is prepared through mixing, wherein the particle size of the nano silica sol is 7-12 nm, and the weight percentage content sum of the components is 100%. The viscosity and stability of oil-in-water emulsion is improved by adding nano silica, the oil-in-water emulsion can improve the displacement efficiency of chemical flooding and also improve sweep efficiency and can improve the displacement efficiency by 30% or above based on water flooding by serving as the oil displacement agent for tertiary oil recovery.

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