Fig.1

Map showing the regional structures and hydrocarbon distribution in the Dongpu Sag，Bohai Bay Basin （modified after reference ［16］）"

Fig.2

Classification of organic matter types for source rocks across varying sequences in the Dongpu Sag， Bohai Bay Basin"

Fig.3

Relationships of organic matter abundance and maturity of source rocks with depth across varying sequences in the Dongpu Sag， Bohai Bay Basin"

Fig.4

Diagrams showing burial depth-varying reservoir porosity （a） and permeability （b） of the Wenliu oilfield in the Dongpu Sag， Bohai Bay Basin"

Fig.5

Isopach maps of sand bodies in the Paleogene Shahejie Formation， Dongpu Sag， Bohai Bay Basin"

Fig.6

Frequency histograms showing the reservoir physical property distributions of favorable sedimentary microfacies in the Dongpu Sag， Bohai Bay Basin"

Fig. 7

Map showing the relationships between hydrocarbon-generating sub-sags and hydrocarbon distribution in the Dongpu Sag， Bohai Bay Basin"

Fig. 8

Comparison of thermal evolution characteristics between salt-bearing and salt-free areas in the Dongpu Sag， Bohai Bay Basin （modified after reference ［21］）"

Fig.9

Bar charts showing the proven reserves distributions of crude oil （a） and natural gas （b） in the Dongpu Sag， Bohai Bay Basin"

Fig. 10

Clustering distribution （a） and maturity evaluation （b） of crude oil in the Dongpu Sag， Bohai Bay Basin"

Table 1

Geochemical characteristics and genetic classification of crude oil of the saline lake facies in the northern Dongpu Sag，Bohai Bay Basin"

Fig. 11

Heterogeneous distributions of the geochemical characteristics of crude oil across varying tectonic zones of the northern Dongpu Sag， Bohai Bay Basin"

Fig. 12

Hydrocarbon accumulation model of Wenmingzhai-Weicheng oilfield in the northern gentle slope zone of the Dongpu Sag， Bohai Bay Basin"

Fig.13

Map showing the geochemical tracing results of hydrocarbon charging patterns along the central uplift zone to the Wenliu tectonic zone in the Dongpu Sag， Bohai Bay Basin （evidenced by lateral charging based on the relative abundance of pyrene）"

Fig. 14

Vertical hydrocarbon migration and accumulation models in the Wenliu tectonic zone of the central uplift zone， Dongpu Sag， Bohai Bay Basin"

Fig. 15

Diagram showing a comprehensive hydrocarbon accumulation and evolutionary modelof the Dongpu Sag， Bohai Bay Basin"