Research and Application of Hydraulic Injection Precise Fracturing Technology in W27 OilfieldYang Li-yong, Yin Shun-li, Zhuang Tian-lin, Gou Xiao-ting and Du Yu-qiaoE3S Web Conf., 252 (2021) 01059DOI: https://doi.org/10.1051/e3sconf/202125201059