Department of Geology, Northwest University, Xi’an 710069/Yanchang Oilfield Company Limited, Yanchuan, Shaanxi 717208
School of Petroleum Resources, Xi'an Shiyou University, Xi’an 710065
School of Petroleum Resources, Xi'an Shiyou University, Xi’an 710066
School of Petroleum Resources, Xi'an Shiyou University, Xi’an 710067
Department of Geology, Northwest University, Xi’an 710069
Copyright © Yunkui Yan, Huifeng Li, Chunguan Zhang, Haiou Lu, Qing Chen 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.