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利用轻烃Ｃ６、Ｃ７化合物编制两种星图。一种是轻烃蚀变星图，用来研究原油由于水洗作用、生物降解作用和蒸发分馏作用等次生蚀变作用对轻烃化合物组成的影响；另一种是轻烃对比星图，用来进行原油之间的地球化学参数对比研究。应用这两种星图对塔里木盆地同一口井和同一个油气田的凝析油与原油之间进行了对比研究，同时探讨了同一个构造中相同成因原油之间的次生蚀变作用，收到了较好的效果。图３表２参１２（梁大新摘）
The use of light hydrocarbons C6, C7 compound preparation of two kinds of star map. One is the light hydrocarbon alteration chart, which is used to study the effects of secondary alteration of crude oil on the composition of light hydrocarbon compounds such as water washing, biodegradation and evaporative fractionation. The other is the comparative chart of light hydrocarbons with To compare the geochemical parameters between crude oil. By using these two kinds of charts, a comparison is made between the condensate and the crude oil in the same well and the same oil and gas field in the Tarim Basin, and the secondary alteration between the same genetic oil in the same structure is also discussed. Better effect. Figure 3 Table 2 Reference 12 (Liang Daxin Abstract)