Research Article
Geochemical Characteristics and Origins of the Crude Oil of Triassic Yanchang Formation in Southwestern Yishan Slope, Ordos Basin
Table 1
Data of group component of crude oil and source rock samples in Southwestern Yishan Slope.
| ā | Sample number | Reservoir | Deep (m) | Asp (%) | Sat (%) | Aro (%) | non (%) | Sat/Aro | Asp + non (%) |
| Crude oil | S1 | Chang 1 | 1614.2 | 1.39 | 65.18 | 8.95 | 24.47 | 7.28 | 25.86 | S2 | Chang 2 | 1671.7 | 1.32 | 56.51 | 10.42 | 31.76 | 5.42 | 33.08 | S3 | Chang 2 | 1652.0 | 2.04 | 59.49 | 7.43 | 31.04 | 8.01 | 33.08 | S4 | Chang 2 | 1643.0 | 1.40 | 58.57 | 10.17 | 29.86 | 5.76 | 31.26 | S5 | Chang 3 | 1673.6 | 2.12 | 60.52 | 10.44 | 26.93 | 5.80 | 29.04 | S6 | Chang 3 | 1686.0 | 1.16 | 62.19 | 9.56 | 27.09 | 6.51 | 28.25 | S7 | Chang 4 + 5 | 1732.6 | 0.38 | 67.41 | 6.01 | 26.20 | 11.21 | 26.57 | S8 | Chang 4 + 5 | 1712.0 | 1.33 | 56.19 | 10.05 | 32.44 | 5.59 | 33.77 | S9 | Chang 6 | 1753.7 | 2.56 | 64.48 | 9.93 | 23.02 | 6.49 | 25.59 | S10 | Chang 6 | 1796.1 | 6.26 | 53.04 | 8.90 | 31.81 | 5.96 | 38.07 | S11 | Chang 7 | 1843.3 | 1.90 | 65.44 | 6.56 | 26.10 | 9.97 | 28.00 | S12 | Chang 7 | 1827.0 | 0.42 | 76.95 | 5.98 | 16.66 | 12.87 | 17.08 | S13 | Chang 8 | 1948.4 | 3.01 | 43.75 | 11.99 | 41.25 | 3.65 | 44.26 | S14 | Chang 8 | 1879.1 | 1.58 | 63.64 | 10.94 | 23.84 | 5.81 | 25.42 | S15 | Chang 8 | 1919.4 | 2.10 | 64.42 | 7.55 | 25.92 | 8.53 | 28.03 | S16 | Chang 8 | 1955.7 | 0.82 | 76.95 | 7.69 | 14.54 | 10.01 | 15.36 | S17 | Chang 9 | 2078.5 | 0.71 | 67.97 | 5.58 | 25.74 | 12.19 | 26.45 | S18 | Chang 9 | 1974.2 | 0.63 | 72.69 | 4.21 | 22.46 | 17.27 | 23.10 | S19 | Chang 10 | 2218.7 | 3.94 | 62.02 | 10.39 | 23.64 | 5.97 | 27.59 | S20 | Chang 10 | 2124.0 | 0.74 | 69.94 | 4.61 | 24.70 | 15.16 | 25.44 |
| Source rock | R1 | Yan 6 | 1381.4 | 42.02 | 15.88 | 20.58 | 21.52 | 0.77 | 63.54 | R2 | Yan 7 | 1419.1 | 20.55 | 26.52 | 26.62 | 26.31 | 1.00 | 46.87 | R3 | Yan 9 | 1423.5 | 4.80 | 53.67 | 15.19 | 26.33 | 3.53 | 31.13 | R4 | Chang 4 + 5 | 1689.1 | 21.92 | 28.59 | 30.16 | 19.33 | 0.95 | 41.25 | R5 | Chang 6 | 1730.0 | 16.50 | 48.32 | 20.08 | 15.10 | 2.41 | 31.60 | R6 | Chang 8 | 1945.2 | 22.79 | 40.00 | 20.63 | 16.58 | 1.94 | 39.37 | R7 | Chang 9 | 1970.6 | 6.97 | 36.39 | 30.27 | 26.37 | 1.20 | 33.34 | R8 | Chang 7 | 1723.4 | 0.58 | 59.40 | 7.86 | 32.16 | 7.56 | 32.74 | R9 | Chang 7 | 1746.8 | 2.12 | 62.21 | 8.98 | 26.69 | 6.93 | 28.81 | R10 | Chang 7 | 1813.3 | 1.87 | 57.65 | 9.42 | 31.06 | 6.12 | 32.93 | R11 | Chang 7 | 1837.6 | 3.51 | 60.43 | 9.41 | 26.65 | 6.42 | 30.16 | R12 | Chang 7 | 1823.7 | 2.63 | 57.98 | 6.15 | 33.24 | 9.43 | 35.87 | R13 | Chang 7 | 1786.5 | 0.94 | 63.31 | 11.92 | 23.83 | 5.31 | 24.77 | R14 | Chang 7 | 1803.3 | 4.14 | 65.53 | 9.59 | 20.74 | 6.83 | 24.88 | R15 | Chang 7 | 1867.2 | 2.05 | 58.32 | 9.48 | 30.15 | 6.15 | 32.20 | R16 | Chang 7 | 1783.7 | 1.93 | 61.27 | 6.99 | 29.81 | 8.76 | 31.74 | R17 | Chang 7 | 1795.6 | 0.73 | 56.82 | 5.37 | 37.08 | 10.59 | 37.81 |
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Asp: asphaltene; Sat: saturated hydrocarbon; Aro: aromatic hydrocarbon; non: nonhydrocarbon; Sat/Aro: saturated hydrocarbon/aromatic hydrocarbon; Asp + non: asphaltene + nonhydrocarbon.
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