Thermal pyrolysis of Daqing thermal tar and Xinjiang natural bitumen at various tempertures were studied with the purpose of investigating the mesophase transformation.

通过对大庆热裂化渣油、新疆天然沥青两种典型试样在热转化时中间相转化过程的考察，初步探讨了中间相形成的一般规律。

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The characteristics of natural gas and reservoir bitumen in well Gaoke 1 have been studied by using the geochemical method of gas reservoir.

运用气藏地球化学研究方法，对高科1井的天然气特征、储层沥青的生物标志化合物特征进行了研究。

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The remaining value can be attributed to oil and gas trading and energy products like natural gas, synthetic oil, bitumen and fuel oil.

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Natural gas has to be burned into order to generate the steam needed to made the bitumen fluid enough to move.

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All this heating, plus refining bitumen into something approximating everyday petroleum, gobbles 1, 300 to 2, 100 cubic feet of natural gas per barrel of crude produced.

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