Taking the fourth member of Quantou Formation(K

1

q

4

) in the southern part of central Fuyu oilfield as an example

we systematically identified single sand bodies in the compound distributary channels of delta plain based on study of sedimentary microfacies with integrating various data including cores

well logging and production performance.The results show that K

1

q

4

has well-developed large interconnected and banded compound distributary channel sand bodies of various origins in the study area.Detail characterization of single sand bodies reveals that there are 6 main superposition patterns

including multi-layers

overlapping

multi-boundaries

single-boundary

juxtaposition and isolation.Moreover

8 types of logging-facies marks of single sand bodies are identified for vertical timing and lateral boundary identification.The dense well pattern and small well spacing data in the study area are used to establish a quantitative prediction model for the width-thickness ratio of single sand bodies.By using this model

totally 44 single sand bodies of low sinuous meandering type are recognized in the 5

th

to 10

th

layers of K

1

q

4

.These single sand bodies show a SW-NE trending banded distribution with a width of 150-500 meters

a thickness of 2-8 meters

and a width-thickness ratio of 40-100.Tracer test results prove the accuracy of single sand body identification.