Hindawi Geofluids Volume 2021, Article ID 5583191, 22 pages https://doi.org/10.1155/2021/5583191 Research Article The Lithological Features of Sublacustrine Fans and Significance to Hydrocarbon Exploration: A Case Study of the Chang 7 Interval of the Yanchang Formation, Southeastern Ordos Basin, North China Bo Yang ,1 Hongjun Qu ,1 Jianchao Shi,2,3 Yuqi Bai,2,3 Wenhou Li,1 Yanrong Zheng,1 and Rongjun Zhang4 1State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an, Shaanxi 710069, China 2National Engineering Laboratory of Low-Permeability Oil & Gas Exploration and Development, Xi’an, Shaanxi 710018, China 3Exploration and Development Research Institute, PetroChina Changqing Oilfield Company, Xi’an, Shaanxi 710018, China 4Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710021, China Correspondence should be addressed to Bo Yang;
[email protected] and Hongjun Qu;
[email protected] Received 23 January 2021; Revised 23 February 2021; Accepted 18 March 2021; Published 8 May 2021 Academic Editor: Zhigang Tao Copyright © 2021 Bo Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Chang 7 interval of the Upper Triassic Yanchang Formation in the Ordos Basin represents a typical deep lacustrine depositional sequence. On the basis of field outcrops, cores, well logs, light/heavy mineral provenance analysis, and petrological studies, we evaluated the characteristics of deep-water gravity flow deposition of the Chang 7 interval and constructed a depositional model.