主要用于重油开采的一种热力采油法。
A thermal method of enhanced oil recovery that is used primarily for heavy oil.
随着原油储量的递减及原油的深度开采，世界性原油质量逐渐变重、变劣，轻质油品含量降低，必须进行重油轻质化。
Due to the reduction of petroleum reservoir and deeper extraction, the crude oil is heavier and poorer in the world, and the light products in the oil is becoming decreased.
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