重质原油及各组份数均分子量的测定及地球化学意义

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DETERMINATIONS OF ARITHMETICALLY AVERAGED MOLECULAR WEIGHT OF HEAVY CRUDE OIL AND ITS COMPONENTS AND THEIR GEOCHEMICAL SIGNIFICANCE

摘要: 作者采用“VPO”法对我国某些陆相重质原油及各组份的数均分子量进行了研究和测定,为烃类化学结构的研究提供了重要参数.从测定结果看,我国陆相重质原油的数均分子量大致在480.l—686.2之间,各组份数均分子量分别为:饱和烃385.2—398.6、芳烃362.5—464.7、胶质755.6—1321.7、沥青质856.7—4043.分子量的大小与原油演化程度、比重及族组成有密切关系.

Abstract: The arithmetically averaged melocular weights of certain heavy crude oils of continental facies and their components were determined using VPO method, which provided important parameters of chemical structure for hydrocarbons. The results show that the arithmetically averaged melocular weights of continental facies heavy crude oils in China range approximately from 480.1-686.2. The arithmetically averaged melocular weights of their components are as follows. 385.2-398.6 for saturated hydrocarbons; 362.5-464.7 for aromatics; 755.7-1321.7 for resin and 856.7-4043 for asp-haltene. The melocular weights are closely dependent on the maturity specific density and group composition of crude oils.

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