Study on Anisotropic Petrophysical Modeling of Shale: A Case Study of Shale Oil in Qingshankou Formation in Sanzhao Sag, Songliao Basin, China

Table 1

Characteristics of Qingshankou formation ().

Formation	Lithology	Color	TOC	GR (API)	P-acoustic time us/m	CNL (pu)	DEN (g/cm^3)	LLD (ohm.m)	TH_U	Paleobathymetric (m)	Paleosalinity	Ancient climate	Palaeoenvironment	Seismic reflection characteristics
	Mudstone, shale, ostracod silty mudstone, ostracod containing mudstone	Gray black	0-4.26	88.60-151.89	289.17-378.96	0.17-0.29	2.37-2.58	2.37-5.78	0.76-8.03	25.0-26.0	Freshwater brackish water	Humid climate	Reduction environment	Weak peak, high continuity, local blank reflection
			1.46	125.10	336.98	0.22	2.47	3.46	0.22	25.5
	Mudstone, shale, silty mudstone with ostracod, ostracod bearing mudstone	Gray black	0-6.6	90.15-157.97	284.05-405.11	0.14-0.3	2.23-2.61	3.26-13.19	1-4.7	26.0-28.5				Medium weak peak, high continuity
			2.47	125.81	348.22	0.23	2.44	5.09	2.42	27.4
	Mudstone, shale, silty mudstone containing a small amount of ostracods, ostracod-bearing mudstone	Gray black	0.86-6.17	85.08-164.50	295.12-397.66	0.13-0.29	2.36-2.56	4.5-23.73	0.79-5.2	26.0-27.8				Medium strong peak, high continuity
			2.94	128.20	351.65	0.23	2.44	6.90	2.28	26.9
	Mudstone, shale, silty mudstone with a small amount of ostracod containing	Gray black	1.08-6.73	109.63-153.15	333.20-413.51	0.22-0.31	2.32-2.52	3.71-14.58	1.13-6.93	24.7-25.9				Medium strong peak, high continuity
			3.37	127.74	369.65	0.25	2.43	6.41	2.92	25.3
	Mudstone, shale and three sets of oil shale marker beds	Gray black、black brown	0-7.99	105.78-166.58	298.28-418.47	0.19-0.31	2.26-2.53	3.73-39.9	0.96-7.89	25.7-27.2	Saltwater			Weak peak, medium-low continuity
			3.76	130.931	378.91	0.26	2.41	12.30	2.64	26.5