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所谓“稠油”通常包括两大类；①稠油：粘度大于1000cP。APl重力低于20°；②沥青：粘度大于10000cP，API重力低于10°。这两种油都含有一定的砂和不同数量的溶解气，导致产主泡沫
The so-called “heavy oil” usually includes two categories; ① heavy oil: viscosity greater than 1000cP. APl gravity less than 20 °; ② asphalt: viscosity greater than 10000cP, API gravity less than 10 °. Both oils contain a certain amount of sand and a different amount of dissolved gas, resulting in a producer foam