![]() ![]() The amount of water that emulsifies with crude oil in most production systems can vary widely, ranging from 60 vol% (in rare cases). These droplets also will be widely dispersed, so that they have little chance to collide, coalesce into larger droplets, and settle. The remaining water will be in minute droplets that have extremely low settling velocities. In an untreated emulsion, the density difference between the oil and the water will cause a certain amount of water to separate from the oil by natural coalescence and settling however, unless some form of treatment is used to accomplish complete separation, a small percentage of water probably will remain in the oil, even after extended settling. ![]() Others do not emulsify or form loose emulsions that separate quickly. Some form very stable emulsions that are difficult to separate. Ĭrude oils vary considerably in emulsifying tendency.
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