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| PubMed | |
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Article by Guo, X. X. 1 |
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Article by 2 |
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Article by Liu, L. 1 |
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Article by Meng, Q. A. 3 |
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Article by Yu, M. 1 |
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Article by Yu, Z. C. 1 |
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Article by Song, S. S. 1 |
����ľ���������ϰ���ͭ������—�������ɽ��м��Ϊ���������ʯѧ�۲졢��Ƭ������ɨ��羵�����ȼ����ֶΣ��о���ɽ��м�Ҵ�����������Ӱ�����ء��ۺ��о���Ϊ: ��ɽ��м����ʯ������Ҫ����������( �۽�������) ���������Һ�������ɰ( ��) ��; ������ԭ����϶��ԭ���ѷ졢������϶�������ѷ��4 ��10 �ִ����ռ䣬���Դ����ܿ�Ϊ��; �����еͿ�--�ص����ʹ��㣬�����Ͽ������ݱ�Ե���ӽ�����߲�λ�Ŀ�϶�Ⱥ����ʽϸߣ���������1 900 �� 2 100 m��2 600 �� 2 900 m �������������Ե��쳣�߿�϶��; �����������������ࡢ�����˶����������ú��л������ݻ�������Ӱ�죬������������ͳ���������Ӱ�촢�㴢�����ܵ���ҪӰ�����ء�
Reservoir characteristics and controlling factors of pyroclastic rocks were researched by observation on rocks with slides and SEM��taken those from the Tongbomiao Formation and Nantun Formation in Tanan Depression of Tamtsag Basin as an example�� The pyroclastic rocks are mainly composed of tuff ( flood tuff) ��sedimentary tuff and tuffaceous sandstone ( conglomerates) �� Pyroclastic reservoir spaces can be divided into four types: primary pores��primary cracks��secondary pores��secondary cracks��including 10 sub-types��dominated by secondary dissolved pores�� The pyroclastic rocks belong to the reservoir with middle-low porosity and extra low permeability in type with approaching the edge of depression��the porosity and permeability become higher�� Two abnormal high porosity belts are found at the locations of 1 900 m �� 2 100 m and 2 600 m �� 2 900 m�� Reservoir qualities are affected by lithology and lithofacies��tectonic movement��diagenesis��thermal evolution of organic matter��etc�� ��in which the main influence factors are lithology��lithofacies and diagenesis��