Pore Structure and Fluid Uptake of the Springer/Goddard Shale Formation in Southeastern Oklahoma, USA

Table 1

Basic information of Springer shale samples.

Sample ID	Well	Depth (ft/m)	TOC (%)^a	Vitrinite reflectance Ro(%)^b	Lithofacies^c	Quartz (%)	Albite (%)	Calcite (%)	Dolomite/ankerite (%)	Pyrite (%)	Donpeacorite (%)	Illite (%)	Muscovite (%)	Kaolinite (%)
A-12847	A	12847/3886.2	4.62	2.51 ± 0.892 ()	Mixed siliceous mudstone	51.1	6.9	7.1	3.3	3.4	2.5	11.4	10.3	4.1
A-12871		12871/3893.5	3.84	2.32 ± 0.868 ()	Clay-rich siliceous mudstone	60.4	12.2			4.0		19.4	4.0
B-12946	B	12946/3916.1	6.74	2.16 ± 1.10 ()
B-13010		13010/3935.5	2.79	2.72 ± 0.925 ()	Clay-rich siliceous mudstone	67.9	6.7			3.3		19.1	3.0
B-13047		13047/3946.7	7.91	2.58 ± 0.879 ()	Silica-dominated lithotype	89.6				1.9		8.5

^aDetermined by following the standard method SY/T 5116-1997 in China. ^bMeasured from the intensity of reflected light from polished vitrinite particles by following the standard method SY/T 5124-2012 in China; the number of observations is listed in parentheses. ^cFrom a mineralogy ternary diagram of sCore lithofacies classification scheme for organic mudstones proposed by Gamero-Diaz et al. [74].