Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing Oilfield

Table 8

Samples of freeze-fluorescence thin section.

No.	Porosity (%)	Permeability (10^-3 μm^2)	Depth (m)	Color, oil-bearing grade lithology	Water flooding degree	Layer	Facies	Flow unit
15	27.3	395	1148.1	Gray-brown, oil-stain siltstone	Low	PI1	Distributary channel	Weak-current limiting
21	27.3	258	1149.42	Brown, oil-rich siltstone
23	30.1	3569	1150	Brown, oil-rich siltstone				None-current limiting
26	28.7	2087	1150.56	Brown, oil-rich siltstone
28	25.1	29.4	1154.45	Brown, oil-saturated siltstone	High	PI2	Distributary channel	Unshielded
34	23.8	13.4	1155.57	Gray-brown, oil-stained siltstone
39	25	32.1	1156.41	Brown, oil-rich siltstone
42	27.7	315	1156.81	Brown, oil-saturated siltstone
45	28.1	425	1159.05	Brown, oil-rich siltstone	Low	PI3	Distributary channel	Medium-current limiting
47	23.8	48.2	1159.29	Brown, oil-rich siltstone
52	28.4	1255	1160.12	Brown, oil-rich siltstone				None-current limiting
56	28	1211	1160.69	Brown, oil-rich siltstone
66	28.4	1337	1162.56	Brown, oil-rich siltstone
68	25.9	335	1162.97	Brown, oil-rich siltstone
76	28	140	1167.96	Gray-brown, oil-stained siltstone	Low	PI5+6	Distributary channel	Unshielded
77	27	141	1168.43	Brown-gray, oil spot siltstone