应用芳烃、中性氮馏分研究油藏原油注入史

A Research into Reservoir Filling History of M Oilfield, Junggar Basin Based on Aromatic and Neutral Nitrogen Fraction

油藏中原油的成分经常是非均质性的，这种现象在低渗透油田更为明显。它可起因于原油的充注效应和运移过程，亦可源于原油在油藏中的次生化学变化。准噶尔盆地Ｍ油田为一低渗透油田，原油分布特征的研究表明，随着原油密度由东向西增加，原油芳烃馏分的成熟度参数以及与成熟度有关的三芳甾烷浓度等均表现为较好的协同变化关系。芳烃馏分和中性含氮化合物运移参数的分布表明，该油藏原油是自东而西注入的。

Components of oil in a reservoir are always heterogeneous,especially in a low permeable oilfield,which may result from oil filling effect,oil migration process and secondary chemical changes of oils in the reservovr.M oilfield in Junggar basin is a low permeable one.Based on the studies of oil occurrence in the field,it can be observed that the parameters of aromatic maturity and density of triaromatic steranes are related to oil maturity change in terms of the variation of oil density from low in the east to high in the west.Migration parameters based on aromatic fraction and neutral nitrogen compounds show that oils in the reservoir are migrated from east to west.The characteristics all mentioned above indicate that the direction of reservoir filled is from east to west.