China Coal Research Institute Xi’an Science and Industry Group;
Xi’an;
China;
China University of Petroleum (East China);
Qingdao;
China;
Jilin University;
Changchun;
China;
Research Institute of Exploration and Development;
Petro Changqing Oilfield Company;
Xi’an;
China;
Factor; Analysis; Tight; Sandstone; SULIGE; Region; Post-Frac; Productivity;