����������438 ����λ�ڰ���������Oued Mya ��ر���������ʯ�͵������ۺͲ��ԡ��⾮�������ϣ���������������438 ����������ز���Ͳ�����������������438 ����������Oued Mya ��ع��������ڿ���ͨ��أ������˰���ϵ��־��ϵ������ϵ���׺���ز㣬������־��ϵ��ҳ�ҺͰ���ϵҳ��������Դ�ң��߱����õ�����������������NGS-P1 ����ʵ̽���ϣ��ѷ��ڰ���ϵ��Hamra ʯӢɰ�ҵijɲ������������ã�ӦΪ�ѷ���Ȧ��; �����������Dale de M'Kratta ɰ�Һ�����ϵɰ�ҵijɲ������������ã�ӦΪ����--����Ȧ�գ��ƶϱ��������������ɲ�ģʽΪ�ϲ��䵼�͡�

Algeria block 438 is located in the north of Oued Mya Basin�� By petroleum geological theory and testing and well logging data��the authors analyzed the Paleozoic strata and reservoir characteristics of the block�� The results show that the Oued Mya Basin was a craton basin in Paleozoic��which deposited several marine strata in Ordovician��Silurian and Devonian�� The block developed two source rocks including Silurian mudy shale and Ordovician shale with good source-reservoir-cap condition�� On the basis of actual data of Well NGS-P1��fractures played the leading role in the reservoir formation of Hamra quartz sandstone in Ordovician��belonging to fracture trap; while the structure and lithology played the leading role in the reservoir formation of Dale de M'Kratta sandstone and Devonian sandstone��which belong to structural and lithological trap�� Therefore��the accumulate model in the studied area was fault transportation type in Paleozoic��