The Research and Application of Microbial Degradation Technology on Heavy Oil Reservoir in Huabei OilfieldGuan Wang, Rui Wang, Yaxiu Fu, Lisha Duan, Xizhi Yuan, Ya Zheng, Ai Wang, Ran Huo and Na SuE3S Web Conf., 38 (2018) 01054DOI: https://doi.org/10.1051/e3sconf/20183801054