The Occurrence of Adsorbed Tight Oil and Its Effect on Porosity and Permeability Reduction of Triassic Lacustrine Sandstone Reservoir

Table 3

Data of rock density and porosity permeability change before and after Soxhlet extraction.

Samples	Depths (m)	(%)	(×10^-3 μm^2)	(g/cm^3)	(%)	(×10^-3 μm^2)	(g/cm^3)	△Φ/%	△K/×10^-3 μm^2	△Φ%/%	△K%/%
B455-2-46	2147.87	18.10	8.850	2.682	23.57	9.338	2.251	5.47	0.488	23.21	5.23
B455-2-60	2149.47	13.36	2.327	2.664	16.63	2.901	2.247	3.27	0.574	19.66	19.79
B436-7-33	2192.60	9.41	0.349	2.534	12.03	0.584	2.348	2.62	0.235	21.78	40.24
B436-7-38	2193.20	10.69	0.493	2.588	13.38	0.827	2.306	2.69	0.334	20.10	40.39
B456-6-6	2134.20	11.61	0.474	2.536	14.35	0.639	2.314	2.74	0.165	19.09	25.82
B280-13-3	2213.35	10.95	0.114	2.498	13.02	0.244	2.296	2.07	0.130	15.90	53.28