Brittleness Logging Evaluation of Shihezi Formation in Yanchang Gas Field in Ordos Basin Based on Rock Mechanical CharacteristicsZhenhua Li, Ke Gai, Zhanjun Chen, Suya Zhang, Ning Sun and Xiangyang LiE3S Web Conf., 118 (2019) 03010DOI: https://doi.org/10.1051/e3sconf/201911803010