����о�۲������Ļ����ϣ�������ʯѧ�������������졢���ﻯʯ���⾮������Ӧ�����ȱ�־���Դ��쳤ԫ�Զ�����—˫�ǵ��������Ͳ���������ͼ����������˷���������������ڷ����Ͳ� (K f ) ����dzˮ��������������������ֳ��������ͣ���һ�����Ի���Ϊ 5 ������� 11 ��΢�࣬��Ҫɰ������Ϊ�Ӵ���̲������������ƽԭ�����ӵ�ɰ���������ǰԵˮ�·����ӵ�ɰ�塣�ڴ˻����Ͻ�ϸ߷ֱ��ʲ���ز㻮�֣��������Ͳ㻮��Ϊ 2 �����ڻ�׼�����غ� 7 �����ڻ�׼�����ء������˲���ز������о�������΢��ƽ��չ��ͼ������������ƽ��չ���ʹ����ݻ����ɡ��о������������ϳ���ˮ�����Ϊ�����𽥱�dz�ٱ���Ĺ��̣��� MSC4 �½��������� MSC5 ���������س���ʱ�ڣ��ﵽ��dz����ʱ��ȫ����Χ�ڷ����Ӵ������������ƽԭ���࣬�ӵ�ɰ���ģ���Ϊ����ɰ�巢�������ʱ�ڡ�

Based on core observation and description��combined with various marks��such as rock types�� sedimentary structure��fossils and characteristics of logging curve response��the authors analyzed depositional facies and characteristics of Fuyu reservoir (K f ) in Chaochang-Shuangcheng area��eastern Daqing placanticline�� The results show that two types of facies��shallow- water delta and meandering river sedimentary facies are developed in the studied area�� They are further divided into five subphases and eleven microphases�� Types of sand bodies mainly include bed- side beach deposition��delta plain distributary channel sand body��as well as delta front underwater distributary channel sand body�� On this basis��combined with high- resolution sequence stratigraphic division�� Fuyu reservoir can be divided into two long- term cyclic sequences��seven middle- term cyclic sequences�� Sedimen- tary microfacies plane distribution maps are established according to analysis results and the regulations on the plane distribution and vertical evolution are analyzed�� Vertically��changes of depth of water show such procedure: it starts from deep to shallow��and then gradually varies from shallow to deep�� In turning point of MSC4 drop- half cycle to MSC5 rise- half cycle��the depth of water reaches the shallowest value�� ��esults show that the shallow- water delta sedimentary facies are developed in the studied area and types of sand bodies are mainly delta plain�� In this period��river and delta plain are developed in the whole area��channel sand body is in max thickness��and it is the best time for the development of sand body as reservoir��