Recovery efficiency of shale oil is low due to high density

high viscosity

low porosity and low permeability

and it is necessary to evaluate the resource potential of the enriched resources that are high in resource abundance and low in exploitation difficulty.TOC over 4% is taken as the criteria for classification of enriched shale oil resource according to the triple-division relationship between S

1

and TOC.Because of the light and heavy hydrocarbon loss in S

1

S

1

should be corrected before it is used to evaluate the resource potential.Comparative analysis shows that S

2

decreases when the shale sample is extracted by chloroform

indicating that there are some residual hydrocarbons in S

2

but they have been eliminated by extracting process.The distinction ΔS

2

is used to correct the heavy hydrocarbon of S

1

and the correction coefficient increases with the increase of maturity.Assuming that the light and heavy hydrocarbons expel at the same rate during the hydrocarbon expulsion process

the ratio calculated with hydrocarbon generation kinetics theory is used to correct the light hydrocarbon of S

1

.With the increase of maturity

the correction coefficient of light hydrocarbons first decreases and then increases.On the basis of evaluating the organic heterogeneity by logging

the enriched shale oil resource is classified

and its potential is evaluated by using the corrected S

1

.The potential enriched shale oil resource is about 2.2×10

8

t in E

2

s

4(2)

sub-member in the Damintun Sag

Liaohe Depression

Bohai Bay Basin.