Abstract: After more than 50 years, the Jiyang depression has entered a mature exploration stage on the whole and the exploration degree is getting higher and higher. Based on the analysis of "layer unit"-based remaining resource potentials and effcient reserve increase targets in the exploration and development stage, the future exploration targets have been identifed and the future exploration plan has been proposed. The study results show that the remaining resources in the Jiyang depression are still abundant; re-recognition of previous primary reservoirs involving channel sandstone, steep-slope glutinite, beach-bar sandstone and turbidite sandstone can fnd more large-scale reserves; fne analysis of the "blank reserve area" in the main oil-bearing reservoirs formed during the fault and depression of the Sha 4 and Dongying Formation can identify a series of proftable reserves; re-understanding of new strata and zones in old exploration areas using new principles can continuously make new discoveries; and unconventional resources such as shale oil and gas and coal-formed gas are succeeding resources in middle and long terms in the Jiyang depression. The Jiyang depression will keep a long-term and stable reserve increase based on re-recognition of remaining resources, innovative theories, advanced technology and effective management.

Key words: Bohai Bay Basin, Jiyang depression, effective exploration, layer unit, mature exploration area