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油水乳状液不稳定的表现之一是转相。注水开发的油田,油井含水上升,乳状液中水(或油)的内相体积增大。当含水上升到一定程度即内相体积增大到一定数值时,油水乳状液将发生转相,即由 W/O 或O/W 型转为 O/W 或 W/O 型。同时,由于转相,使游离水增多,回压降低,管线沿程的流动阻力减小,这对原油的不加热输送,减少油田老区改造的投资以及减少脱水破乳剂的用量,都是很有利的。
One of the manifestations of oil-water emulsion instability is phase inversion. Waterflooding oilfields, oil wells, water increases, the emulsion of water (or oil) phase volume increases. When the water up to a certain extent, that is, when the internal volume increases to a certain value, the oil-water emulsion will phase change from W / O or O / W to O / W or W / O. At the same time, due to the phase change, so that increased free water, back pressure to reduce the flow resistance along the pipeline to reduce the non-heating crude oil transportation and reduce the transformation of the old investment in oilfields and reduce the amount of dehydration demulsifier, are very beneficial of.