Abstract: The exploration and development of Huangjindai Oilfield in Liaohe Basin was mainly focused on the intermediate and upper submembers of Es-1, while less attention has been paid to Dongying Formation of shallow layers, lower submember of Es-1 and Es-3 of deep layers. This provides space for potential exploration. On the basis of further study on the hydrocarbon reservoir formation model and the reservoir forming assemblage of the area, abundant shallow gas layers are discriminated in Dongying Formation through several years of adjustment and deployment, developing huge production capacity. What's more, four potential block faulted regions are discovered in deep layers. Diversified technologies including reservoir modeling and inversion of reservoir are used to conduct rational arrangement, which does not only increase oil-gas productivity but also reveals the potential of deep layers. Based on summing up the results of tapping potential of mature areas of the oilfield achieved before the Tenth Five-Year Plan period, it reveals that the further study on the non-essential series of strata of mature exploration areas are of great significance. Meanwhile, it is important to persist in integral cognition, to lay the same emphasis on deep and shallow layers, and to pay attention to fundamental petroleum geology study, such as reservoir formation models and reservoir-forming assemblages during the exploration and development for oil and gas.

Key words: non-essential series of strata, further study, mature exploration area, Huangjindai Oilfield, Liaohe Basin