其中包括沥青，焦油和蜡。

These comprise asphalt, tar and waxes.

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即蜡的含量与组成结构均会对沥青的性能产生重要的影响。

There- fore, the quantity and constitution of wax will both influence the asphalt performance.

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由于粘土运移及蜡和胶质沥青质垢的生成，近年来油井产量逐年下降。

Oil production in recent years decreases due to clay migration and the formation of wax and gel asphalt scales.

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