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. 2019 May 10;5(5):e01561. doi: 10.1016/j.heliyon.2019.e01561

Table 2.

Bulk geochemical and selected biomarker parameters for the analysed shales of Araromi Formation from Gbekebo well in Dahomey Basin.

Sample No Depth TOC S1 S2 Tmax HI PI Pr/Ph %C27 %C28 %C29 %C30 OL C29 S/S + R
GB 304 834 0.50 0.00 0.01 430 2.00 0.00
GB 305 835 0.63 0.12 0.36 425 57.14 0.25
GB 306 841 1.02 0.14 0.51 425 50.00 0.22
GB 307 845 1.01 0.13 0.48 432 47.52 0.21 1.06 36.94 25.55 37.06 0.45 0.00 0.23
GB 309 850 0.69 0.05 0.24 425 34.78 0.17
GB 310 853 0.91 0.04 0.34 430 37.36 0.11 1.28 45.28 26.62 28.09 0.00 0.00 0.18
GB 311 854 0.99 0.06 0.55 430 55.56 0.10
GB 312 859 0.95 0.08 0.41 425 43.16 0.16
GB 313 861 1.00 0.28 0.42 432 42.00 0.40
GB 314 862 0.68 0.12 0.44 435 64.71 0.21 0.78 24.10 41.81 32.77 1.32 0.00 0.25
GB 315 863 0.91 0.07 0.36 435 39.56 0.16 0.93 23.62 35.50 38.88 2.00 0.06 0.31
GB 316 864 0.76 0.06 0.21 437 27.63 0.22
GB 318 865 0.82 0.06 0.30 431 36.59 0.17 1.18 22.16 39.74 36.59 1.51 0.00 0.26
GB 320 874 1.24 0.06 0.15 422 12.10 0.29
GB 323 883 1.67 0.12 1.29 435 77.25 0.09
GB 324 885 1.70 0.06 0.83 432 48.82 0.07 1.25 31.95 41.15 24.29 2.61 0.00 0.31
GB 325 887 1.87 0.27 3.01 427 160.96 0.08
GB 326 889 2.13 0.18 5.25 430 246.48 0.03 38.20 38.47 20.83 2.50 0.00 0.26
GB 327 890 2.12 0.17 3.01 427 141.98 0.05
GB 402 903 1.97 0.21 1.39 432 70.56 0.13 31.39 31.00 33.51 4.11 0.23
GB 421 959 1.66 0.28 0.42 415 25.30 0.40
GB 450 1012 2.24 0.31 5.01 433 223.66 0.06 1.13 33.68 38.20 25.09 3.02 0.20 0.29
GB 451 1013 2.52 0.32 6.44 432 255.56 0.05
GB 454 1016 4.78 0.81 13.75 434 287.66 0.06
GB 455 1017 3.33 0.73 10.30 431 309.31 0.07 2.02 30.15 30.74 33.89 5.23 0.21 0.16
GB 456 1019 3.94 1.29 12.88 426 327.07 0.09 1.39 37.91 33.23 26.73 2.13 0.12 0.47
GB 460 1028 1.54 0.31 1.09 434 70.78 0.22 0.96 34.20 33.56 29.00 3.24 0.09 0.19

Depth-ft, Formation-Fm, S1-(mgHC/grock), S2-(mgHC/grock), SP-(kg/t), Tmax - oC, VRo-%, TOC - wt%, HI-(mgHC/grock), Pr/Ph = pristane/phytane. % C27-C30 = % individual C27-C30 ααα sterane to sum of C27-29 ααα regular steranes. OL = 18α(H) + 18β(H) oleanane/C30 17α(H),21β(H)- Hopane. C29 S/S + R = ratio of 5α(H),14α(H),21α(H) - steranes (20S/S + R) thermal maturity parameter.