[an error occurred while processing this directive] ������� 2019, 38(1) 175-183 DOI:   10.3969/j.issn.1004-5589.2019.01.016  ISSN: 1004-5589 CN: 22-1111/P

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PubMed
Article by Cheng H
Article by Li C
Article by Lu J
Article by Liao K
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2. �й�ʯ�����������ֹ�˾������������, �Ĵ� �ɶ� 610041
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Development mechanism of tight calcarenaceous sandstone reservoir of the third member of Xujiahe Formation in Yuanba gas field of Sichuan Basin
CHENG Hong-liang1, LI Chang-feng2, LU Juan1, LIAO Kai-gui1
1. Research Institute of Exploration & Developmen, Sinopec Southwest Oil & Gas Company, Chengdu 610041, China;
2. Oil and Gas Development Management Department, Sinopec Southwest Oil & Gas Company, Chengdu 610041, China
Abstract: The calcarenaceous sandstone reservoir of the third member of Xujiahe Formation in Yuanba gas field is tight and with strong heterogeneity. The reservoir productivity varies greatly. Based on core and electro-imaging data, thin section analysis, sedimentary hydrodynamic condition, sand thickness, particle size of rock matrix, fracturing, and the leading factor of fracture, the macro mechanism of high quality calcarenaceous sandstone reservoir has been defined preliminarily. The distribution of high calcarenaceous sandstone is manly controlled by the strength of sedimentary hydrodynamics. The distribution of high quality reservoir is based on the content of carbonate rock fragments, grain size and the sand thickness,and the double seepage action of fracture is the key. The structural heterogeneity within sand body is the main factor of fracture development. Comprehensive study shows that the rigid heterogeneous stacked sand bodies with single thickness smaller than 3 meters and accumulated thickness more than 10 meters have the potential of exploration and development.
Keywords: calcarenaceous sandstone   high quality reservoir   fracture   stacked   the third member of Xujiahe Formation   Yuanba gas field  
�ո����� 2017-09-04 �޻����� 2018-12-27 ����淢������  
DOI: 10.3969/j.issn.1004-5589.2019.01.016
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