【摘要】 塔里木盆地哈得逊及相邻地区存在一些化学组成相似的中—高密度原油。对原油中含氮化合物浓度和相对组成特征进行了较系统的研究,结果表明,原油中含氮化合物分布特征和原油的运移分馏效应存在较好的成因联系。随着运移作用的加强,“屏蔽”型与“暴露”型或“半屏蔽”型化合物的比值增加,含氮化合物浓度下降,且不同化合物之间的比值均表现出较强的协同变化关系。含氮化合物运移参数的分布特征表明,哈得4油田原油总体上具有由北向南的运移和充注过程。这与区域上原油的运移方向是一致的。更多还原

【Abstract】 Some middle-high density oils with s imilar compositional characteristics are distributed over Hadexun and its adjacent oilfields in the Tarim B asin,NWChina.On the basis of investigation of concentrations of and int ernal compositions of nitrogen compounds from the studied oil samples,it can b e seen that distribution patterns of nitrogen compounds are related to oil fractio nation effect in the processes of oil migration.With the increase of oil m igration effect,the ratios of shielded nitro gen compounds to exposed or semi-shi elded ones increase whereas the concentrations of nitrogen compounds decrease.Oil migration directio ns or reservoir-filling directions in the Hadexun oilfield,shown by nitrogen compounds migration parameters,are from north to south,which is consis tent with the regional oil migration dire ction.更多还原