�� NGN1 ��ȫȡо��Ϊ��ˣ�ͨ����о�۲졢����ѧ��������΢��־��¼�������ʾ��ɽ����һ�ε��л����ݻ����ɡ�NGN1 �꾮λ��������ض���Ե����һ���ɵ������ֱ�Ϊ����ɫ���ʷ�ɰ��- - ���ɫ���ҡ���ҳ��- - ��ɫ����- - ����ɫ��ɰ�����ҳ�������ʾ���ɱ�dz��- -�����- -��dz���ij��������ݻ���TOC��S 2 ���������Լ� HI ��������- -��ֵ- -��С�����ƣ����뽹�����Ϳ�״�ܶ�����෴�ı仯���ơ���һ����������Ҫ���л�����΢���Ϊ��״�塢������͹�м�ȣ��л��ʺ����뵥λ�����΢��֡�������Ժ����������Ե�����أ�������л����б�ͼ�⣬˵���л���������ҪΪ I �ͺ� II 1 �ͣ���Դ�Ժ�������Ϊ���������е�½Դ�л��ʺ������٣�˵����������������л��ʵ���Դ��dz������ˮ���dz��ˮ�׺��������������ϲ���������е��л��ʷ�Ƚϵͣ������- -���ˮ���������������ã��ٽ��л��ʵĸ�������˴����ϳ��������ݻ��ǵ����л��ʱ仯����Ҫ���ء�

According to the core observation�� geochemical analysis and maceral identification�� we indicate the law of the organic matter evolution in the first member of Qingshankou Formation by the Well NGN1�� The Well NGN1 is located in the southeast of Songliao Basin�� There is gray- green argillaceous siltstone- dark gray shale��oil shale- gray mudstone- gray- green silty mudstone from bottom to top in the first member of Qingshankou Formation�� It reveals that the evolvement of sedimentary environment is from shallow lake to semi- deep lake to shallow lake�� TOC��S 2 ��FA and HI show the increase- a high value- decrease trend��and semi- coke content and bulk density are showing the opposite trend�� By the maceral identification of oil shale polishsection�� the main organic maceral are la- malginite��sporinite and fish bone�� The maceral identification shows that the organic matter content has a positive correlation with the relative content of macersl and algae components per unit area�� Combined with organic discrimi- nation diagrams�� it is explained that the organic matter type is mainly type I and II 1 �� and the main source of organic matter is lake algae�� Terrestrial organic matter content is very little in the mudstone��so it illustrates that the lake biology is the organic matter sources�� The poor storage conditions of the shallow lake lead to lower abundance of or- ganic matter in mudstone�� The good preservation conditions of semi- deep lake and deep lake promote the enrich- ment of organic matter�� Therefore�� sedimentary environment evolution is the main factor of the change of the organic matter in vertical direction��