Optimization of reinjection treatment technology for oilfield wastewater in Longdong areaXiulan Zhu, Yanlong Ran, Wenjie Guo, Ke Gai, Yanju Li, Caini Yan and Baobao DingE3S Web Conf., 194 (2020) 04046DOI: https://doi.org/10.1051/e3sconf/202019404046