Practice proved that adding chemicals not only decreases the viscosity of crude but also the back pressure of well head decreased.

实践证明，掺污水加药既可以降低原油粘度，又可以有效地降低井口回压。

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A method to reduce the viscosity of crude oil in oil production using combination of chemical and physical viscosity - reducing means was introduced.

介绍了稠油开采过程中因稠油粘度过高采用的物理与化学相结合的降粘方法。

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The viscosity of crude oil from viscous oil reservoir is high and heavy hydrocarbon components constitute the majority. So, it is difficult to produce oil from production Wells.

由于稠油段油层原油的粘度高，重烃组分所占比例大，因此造成采出井采出困难。

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Sweet light crude oil yields the most gallons of gasoline per barrel of oil and since it has low viscosity and low density, it is comparatively inexpensive to pump, transport, and refine.

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