The results of analyses on some prarmeters of pyrrolic nitrogen compounds in oils indicate that migration effects are obvious.It is suggested that oils likely move from north to south.

• 对原油中含氮化合物的丰度、异构体参数的绝对大小与相对变化的研究结果表明，该油田原油同运移分馏效应明显，推测原油的主运移方向是由北向南。