�����ɺ���ض������� 45 ���꾮�� 305. 79 m ��������о��176 ����о��Ƭ�����Ӧ���εIJ⾮���ϣ����������������ҷ�Ϊ���������ҡ����������Һͽ����������ҵ� 3 �ࡣ���������ҳ����ܿ�״��ʴ��̶ȵͣ��⾮��Ӧ�Ը��ܶ� (ƽ��ֵΪ 2. 71 g·cm ��3 )������Ȼ٤�� (ƽ��ֵΪ 36 API) Ϊ����; �������������׷������౻��ʯ������ʯ�ȳ��ʴ��̶���ߣ��⾮��Ӧ�Ե��ܶ� (ƽ��ֵΪ 2. 47 g·cm ��3 )��������ʱ�� (ƽ��ֵΪ 72 μs·ft ^��1 ) Ϊ����; �����������ҳ��������״������������ף��⾮��Ӧ�Ե͵����� (ƽ��ֵΪ 8 Ω·m) Ϊ�������� 3 �������ҵIJ⾮��Ӧ�������������ɡ��ṹ���졢ʴ�����ͼ��̶ȡ��׷췢���̶ȼ����ڳ�����졢�������͵�������ء�

Based on the basalt cores of 305. 79 m long�� 176 rock slides and their corresponding logging data of 45 wells in the eastern depression of Liaohe Basin�� the basalts are divided into the massive�� vesicular and brecci- ated basalts in category�� The massive basalt is dense and massive��underwent a low degree of alteration��and its logging is characterized by high density (in average of 2. 71 g·cm ^��3 ) and low natural gamma (in average of 36 API)�� The vesicular basalt is developed in vesicles��mostly filled with zeolite and calcite��underwent the most seri- ous alteration��and its logging is characterized by low density (in average of 2. 47 g·cm ^��3 ) and high acoustic time (in average of 72 μs·ft ^��1 )�� The brecciated basalt is in autobrecciated form��developed in inter- breccia spaces�� and its logging is characterized by low resistivity (in average of 8 Ω·m)�� The mechanisms of well- logging re- sponse of the basalts depend on mineral composition��structure��alteration type and degree��reservoir space and later modification��and hydrocarbon saturation��etc��