Multi-scale fractures formation and distribution in tight sandstones—a case study of Triassic Chang 8 Member in the southwestern Ordos Basin

Gaojian XIAO; Ling HU; Yang LUO; Yujing MENG; Ali Bassam Taher AL-SALAFI; Haoran LIU

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Multi-scale fractures formation and distribution in tight sandstones—a case study of Triassic Chang 8 Member in the southwestern Ordos Basin

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Fracture system is an important factor controlling tight oil accumulation in the Triassic Chang 8 Member,southwestern Ordos Basin,China.A systematic characterization of the multi-scale natural fractures is a basis for the efficient tight oil production.Based on outcrops,seismic reflections,well cores,well logs(image and conventional logging),casting thin sections,and scanning electron microscope observation,the multi-scale fractures occurrences and their influences on Chang 8 tight sandstone reservoirs are revealed.The results show that three periods of strike-slip faults and four scales of natural fractures developed,namely mega-scale(length>7×10^(7) mm),macro-scale(3.5×10^(5)

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《地球科学前沿：英文版》 |2022年第2期|483-498|共16页
作者
Gaojian XIAO; Ling HU; Yang LUO; Yujing MENG; Ali Bassam Taher AL-SALAFI; Haoran LIU;
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作者单位

Key Laboratory of Tectonics and Petroleum Resources;

China University of Geosciences;

Wuhan 430074;

China;

Wenhua College;

Wuhan 430074;

China;

Faculty of Petroleum and Natural Resources;

Sana’a University;

Sana’a;

Yemen;

Louisiana State University;

Baton Rouge LA 7080;

USA;

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原文格式 PDF
正文语种 chi
中图分类矿床学;
关键词
natural fractures characteristics; geological significance; tight sandstone reservoir; Upper Triassic Yanchang Formation;

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Multi-scale fractures formation and distribution in tight sandstones—a case study of Triassic Chang 8 Member in the southwestern Ordos Basin

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