Fig.1

Reservoiring pattern of “teeth?brush?shaped” oil pools in the Zhao 76 fault block， Shulu Sag"

Fig.2

Comprehensive maps showing the geographical location and stratigraphic characteristics of the Shulu Sag"

Fig.3

Fault system division of the Shulu Sag （see Fig.2 C?C' for seismic profiles）"

Fig.4

Distribution of lithic composition content in reservoirs of the Shahejie Formation， Checheng Oilfield， Shulu Sag"

Fig.5

Sedimentary facies distribution maps of each sub?member of the Shahejie Formation， Checheng oilfield， Shulu Sag"

Fig.6

Frequency histograms of physical properties in different layers of “teeth?brush?shaped” reservoirs in the Shulu Sag"

Fig.7

Relationship of porosity， permeability and net?to?gross ratio with oil saturation of different oil layers in the “teeth?brush?shaped” reservoirs in the Shulu Sag"

Fig.8

Distribution patterns of barriers， cap rocks and reservoirs in “tooth?brush?shaped” oil pools， Checheng oilfield， Sulu Sag"

Fig.9

Histograms of physical properties of the barriers within the “teeth?brush shaped” reservoirs in the Shulu Sag"

Fig.10

Distribution characteristics of cap rocks in the Checheng oilfield， Sulu Sag"

Fig.11

Relationship between caprocks and oil saturation of each sub?member of the Shahejie Formation， Checheng oilfield， Sulu Sag"

Fig.12

Contour map of hydrocarbon generation intensity of source rocks in the Shulu Sag （modified after Huo Zhipeng，2019［4］）"

Fig.13

Crude oil density distribution and migration direction of Es1， Es2 and Es3 in the Shulu Sag"

Fig.14

Distribution of structural ridges on top of the Shahejie Formation in the Shulu Sag"

Fig.15

Maps showing the distribution direction of dominant sand bodies and the direction of oil and gas migration， Checheng oilfield， Shulu Sag"

Fig.16

Crude oil density statistics of different layers of south?north direction， Shulu Sag"

Fig.17

A combination map showing the burial history， thermal history of source rocks in the Shulu Sag （a） and the homogenization temperature histogram of the Es2（b）"

Fig.18

Relationship between accumulation periods and fault activity periods in the Shulu Sag"

Fig.19

Reservoiring pattern of the first hydrocarbon accumulation period （Ng period）， Shulu Sag"

Fig.20

Reservoiring pattern of the second hydrocarbon accumulation period （the present）， Shulu Sag"