松辽盆地三肇凹陷扶杨油层石油运移方式

松辽盆地三肇凹陷青一段泥岩是扶杨油层的主要油源岩，在凹陷中部和边部分别以裂隙式和孔隙式排烃。由于地质条件的空间匹配关系不同，产生了３种石油运移方式。垂向运移方式：运移方向与断裂走向、砂体展布方向垂直，侧向运移受阻，石油多呈原地生储特征，如榆树林地区原油；中距离侧向运移方式：运移方向与断裂或砂体两者之一的展布方向垂直或斜交，侧向运移受到一定阻挡，运移距离不大，如朝阳沟地区和太平川地区原油；长距离侧向运移方式：运移方向与断裂走向、砂体展布方向一致，极有利于油气长距离侧向运移，如肇州地区和肇源地区原油。长距离侧向运移可以形成强大的油气运移流，能抵挡地层的吸附，遇到圈闭则可聚集形成油气田。长距离侧向运移所要求的地质条件是必须具备充足的油源、有较好的疏导层和稳定的良好盖层。图２参４（梁大新摘

The migration model of oil in FuyuYangdachengzi reservoir of Sanzhao depression, Songliao basin.

The hydrocarbon expulsion from mudstone in the Qing 1 Member in central Sanzhao depression is different to border region. In the central depression shows the crack expulsion, but at the border show the pore expulsion. Because of different geological conditions, there are three models of oil migration: Vertical migration, Middle distance lateral migration and long distance lateral migration. The long distance migration must have conditions of the rich oilsource, good reservoir and good regional cover formation.