摘要
A number of small Jurassic-Cretaceous fau.lted-depressions have been found through seismic survey in the Zhangqiang area,200 km southeast to the Kailu City.Among them,the Zhangqiang Depression covers an area more than 1000 km?and commercial oil flows were obtained from the Jurassic Jiufutang Formation with single-well flow rate of 2 tons per day.It is predicted that new discoveries will be made by further exploration.Further to the east of the Zhangqiang Depression.oilfields and wells with commercial flow have'been continuously discovered in a series of Jurassi-C-Cre-taceous faulted-depressions;underlying the Songliao downwarp basin,such as the Changtu-Tieling and Lishu-Dehui depressions.
