Taking Panguliang Chang 6 reservoir in Jing'an oilfield as an example

six parameters

including reservoir thickness

porosity

permeability

shale content

flow-zone index

and the product of reservoir thickness and porosity

are selected for quantitative division of flow units

based on comprehensive quantitative analysis and evaluation of sedimentary microfacies and reservoir.Panguliang Chang 6 reservoir is finely divided into 15 sublayers

and all the sandbodies can be grouped into 4 types of flow units

including E

G

M and P

by using high resolution sequence stratigraphy.The results show that the bottom of Panguliang Chang 6

1

and the top of Panguliang Chang 6

2

are the major pay zones of Panguliang Chang 6 reservoir in the study area

and all the flow-unit types are well correlated with lithologies

physical properties

sedimentary microfacies and productivity of the reservoir.The selected values of parameters

comprehensive evaluation functions and indexes for the flow unit division can truly and objectively reflect the geologic features of low permeability and low porosity reservoir

such as poor poroperm characteristics and strong heterogeneity

and can meet the accuracy requirements of flow unit evaluation and division for this kind of reservoir.