School of Geosciences;
Yangtze University;
Wuhan 430100;
China;
School of Geosciences;
China University of Petroleum;
Qingdao 266580;
China;
Gudao Oil Production Plant;
Shengli Oilfield Company of Sinopec;
Dongying 257231;
China;
Exploration and Development Institute;
Sinopec;
Beijing 100083;
China;
paleokarst; karst drainage; watershed; fracture-cave structure; oil and gas distribution; Tahe Oilfield; Ordovician; Tarim Basin;