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本文对松辽盆地南部不同含油组合的42个原油样品中微量金属元素钒、镍、锰、铜含量进行了测定,介绍了测定方法,论述了不同油层原油中这些元素的分布规律。建立了 V—Ni 元素在不同含油组合中相关方程式,计算了 V、Ni、Mn、Cu 元素间相关系数。对影响其含量分布、相关系数差异原因作了初步分析。利用原油中微量元素 V/Ni、Ni/Cu、胶质/沥青质比值变化规律,结合地质特征的分析,判断了松辽盆地南部扶余油层油气二次运移的方向。
In this paper, the contents of trace elements vanadium, nickel, manganese and copper in 42 crude oil samples with different oil compositions in the southern part of Songliao Basin were measured. The determination methods were introduced, and the distribution rules of these elements in crude oils from different reservoirs were discussed. The correlation equations of V-Ni elements in different oil-bearing combinations were established, and the correlation coefficients of V, Ni, Mn and Cu elements were calculated. The influence of its content distribution, the correlation coefficient differences made a preliminary analysis. Based on the variation of V / Ni, Ni / Cu and pectin / asphaltene in crude oil and the analysis of geological characteristics, the direction of secondary migration of oil and gas in Fuyu reservoir in southern Songliao Basin was determined.