Fig. 9

Distributions of sedimentary facies in different layers of the F4 Formation in the Z oilfield; planar distribution of sedimentary microfacies in (a) layer I in the F4 Formation of the Z oilfield; (b) layer II in the F4 Formation of the Z oilfield; (c) layer III in the F4 Formation of the Z oilfield; (d) layer IV in the F4 Formation of the Z oilfield; and (e) layer V in the F4 Formation of the Z oilfield.