��������120 ��ھ���¼���Ͳ⾮�����ۺϷ�������2. 5 × 104 km ��ά�����������������Ͳ�����ά�������������������Է�������ɷ�������: ������������ϵ��Ҫ���������ӡ���״�ӡ������ޡ���dz��������������6 �ֳ����ࡣ�������ʯ�͵��������ͳ����ݻ���������Ϊ����ϵ�����������Ӻͱ�״�Ӻӵ��������޵�ˮ�Ϸ�֧�ӵ���ˮ�·����ӵ��߱��γ�����Ȧ�յĵ��������������������Կ�̽Ŀ�ꡣ

According to the logging data and well logging data of 120 wells��the authors analyze the seismic facies of 25 000 kilometers two dimensional seismic sections and analyze seismic attributes of the three dimensional seismic data of the northern Tarim area��using the seismic amplitude attributes��coherence and seismic facies as the main research techniques�� Six sedimentary facies developed in the Triassic: meandering river��braided river��delta�� littoral-shallow lake��half-deep lake and deep lake�� With the comprehensive analysis of oil and gas accumulation and the sedimentary evolution history��the sandbodys of the meandering river channel��braided river channel��aquatic bifurcating channels and subquatic distributary channel in the Triassic are considered to be favorable lithological- prospecting objects��