页岩油可流动性研究中原油族组分分析的应用

The Application of Crude Oil Group Composition Analysis in Shale Oil Mobility Study

为了研究鄂尔多斯盆地长7段泥页岩中高含量的沥青质组分对页岩油可流动性的影响,将一定量页岩油与过量的沥青质进行溶解试验,利用原油族组分分析检测试验前后页岩油中沥青质的百分含量,进而判断页岩油与沥青质溶解作用的强弱。研究结果表明:溶解试验前后,页岩油中沥青质的百分含量未发生明显变化,长7页岩油与泥页岩中沥青质溶解作用有限,因此泥页岩中高含量沥青质对页岩油的可流动性的影响很小。

The influence of high content asphaltene components on shale oil mobility in Chang 7 shale of Ordos Basin was studied.A series dissolution experiments of shale oil and excess asphaltene were carried out.The percent content of asphaltene in shale oil pre and post the experiment was detected by crude oil group composition analysis,and the dissolution mechanisms of shale oil and asphaltene was analyzed.The results showed that pre and post the experiment,the percentage of asphaltene in shale oil was not changed significantly.The dissolution of asphaltene of Chang 7 shale in oil was limited.Therefore,the high content of asphaltene in shale has little effect on the mobility of shale oil.