�����������ϲ����������������Ͳ㿪չ�ŵ�ò�ָ��������ݻ����о�����3 ���ѵ�: �϶��������ǿ�Ұ�ʴ���ز��ƻ�����; ���Ա仯�����ѹʵ�ָ�����; ���ݼ����Ӵ󡢷���������ͨ����ѡ��Ч�ĵز��ʴ���������������������ѹʵ�ָ����̣����Ʊ�ݵ����������˸����о����о���ʾ�����Ͳ����ʱ�ڣ��о����������ƽ̹��ʹ�úӵ�ɰ��㷺�ֲ����ϡ����ϡ�����3 ��������������4 ��ˮϵ�ķ���; ��ɽ����ĩ�о�������������̬��֮����̬�仯��С�����۽���ĩ�о����в���һ����Դ�������1 400 m���ﵽ����������ȣ������������ڡ�����ˮ��ĩ�������� 2 400 m�����󲿷ֵ����ﵽ����������ȣ�֮��̧����ʴ��������̬���͡�

There are three difficulties in study of paleogeomorphological restoration and tectonic evolution in the Fuyu reservoir of the central depression in south Songliao Basin��including the strong erossion and severe strata destrution in most areas; the lithology changing quickly��making the compacting restoration difficult; and the data calculation tremendous and complicated�� The study has been finally accomplished by selecting the effective strata erosion method��establishing resonable continual compaction restoration equation and working out easier software�� It shows that during the sedimentary period of Fuyu reservoir��the channel sand body were distributed widely��and the three low-potential energy areas in south��southwest and west areas controlled the development of the four water systems�� which all were due to the comparatively even topography in the research area�� The depression conformation of the research area formed at the end of Qingshankou stage with little change happening later��and the buried depth of K1qn1 source rocks in the central research area is over 1 400 m at the end of Nenjiang stage��which reaches the threshold depth of hydrocarbon generation and goes into the stage of hydrocarbon generation and expulsion�� At the end of Mingshui stage��the maxium burial depth was up to 2 400 m��reaching the threshold depth in most of the area�� Lifting and erosion happened later��and the tectoinc conformation finally shaped��