Research Article
Chemically Active Elements of Reservoir Quartz Cement Trace Hydrocarbon Migration in the Mahu Sag, Junggar Basin, NW China
Table 4
Whole-rock major (in wt.%) and trace element (in ppm) data for samples from the Baikouquan Formation.
| Well | B63 | B63 | B25 | YB2 | AH2 | AH11 | D15 | D15 | D12 | D12 | D12 | D18 | D13 | MH23 | MA18 |
| Depth (m) | 2514 | 2452 | 2318 | 4110 | 3314 | 2825 | 4245 | 4254 | 4269 | 4267 | 4284 | 4451 | 4209 | 4079 | 3906 | Al2O3 | 19.66 | 17.44 | 13.12 | 14.9 | 9.69 | 13.15 | 10.83 | 12.42 | 10.62 | 11.29 | 10.65 | 12.78 | 11.04 | 11.1 | 13.46 | BaO | 0.03 | 0.06 | 0.06 | 0.03 | 0.01 | 0.04 | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 | 0.01 | 0.02 | 0.02 | CaO | 0.64 | 0.66 | 0.59 | 0.47 | 0.48 | 0.4 | 0.64 | 0.55 | 0.25 | 0.42 | 0.4 | 1.04 | 1.4 | 0.38 | 1.3 | Cr2O3 | 0.02 | 0.05 | 0.03 | <0.01 | 0.03 | 0.02 | 0.02 | 0.02 | 0.01 | 0.03 | <0.01 | <0.01 | <0.01 | <0.01 | 0.01 | TFe2O3 | 8.94 | 10.25 | 4.33 | 1.68 | 2.19 | 3.12 | 2.78 | 3.99 | 4.16 | 3.84 | 2.66 | 4.45 | 3.45 | 1.55 | 3.73 | K2O | 3.2 | 2.73 | 2.39 | 2.4 | 1.31 | 2.16 | 1.16 | 1.37 | 1.01 | 1 | 1.39 | 1.09 | 0.92 | 1.48 | 1.44 | MgO | 0.95 | 2.04 | 1.3 | 0.66 | 0.75 | 0.9 | 0.76 | 0.73 | 0.88 | 0.9 | 0.62 | 1.33 | 0.97 | 0.52 | 1 | MnO | 0.08 | 0.11 | 0.09 | 0.05 | 0.06 | 0.06 | 0.07 | 0.09 | 0.15 | 0.13 | 0.08 | 0.18 | 0.16 | 0.08 | 0.2 | Na2O | 1.23 | 1.33 | 2.85 | 2.4 | 2.95 | 3.83 | 3.05 | 3.3 | 2.68 | 2.99 | 2.61 | 3.12 | 2.96 | 2.75 | 3.84 | P2O5 | 0.01 | 0.03 | 0.16 | 0.05 | 0.07 | 0.11 | 0.15 | 0.13 | 0.03 | 0.16 | 0.1 | 0.2 | 0.15 | 0.07 | 0.14 | SiO2 | 57.92 | 58.04 | 70.95 | 72.4 | 78.91 | 73.28 | 77.35 | 73.81 | 77.68 | 76.59 | 78.93 | 70.36 | 75.04 | 78.98 | 70.47 | SO3 | <0.01 | 0.02 | 0.02 | 0.02 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | 0.01 | <0.01 | <0.01 | 0.01 | <0.01 | 0.01 | SrO | 0.01 | 0.01 | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 | TiO2 | 0.91 | 0.82 | 0.66 | 0.63 | 0.39 | 0.48 | 0.43 | 0.48 | 0.37 | 0.47 | 0.37 | 0.78 | 0.48 | 0.19 | 0.44 | LOI | 6.14 | 6.36 | 2.92 | 3.37 | 2.49 | 2.04 | 2.37 | 2.6 | 1.95 | 2.17 | 1.9 | 3.97 | 3.53 | 2.26 | 3.56 | La | 12.7 | 19.7 | 15.2 | 23.3 | 14.9 | 17.6 | 24 | 27.9 | 15.9 | 23.1 | 20.3 | 21.7 | 17.8 | 18.6 | 20.1 | Ce | 23.7 | 43.2 | 32.7 | 51 | 34.8 | 37.7 | 53.1 | 55.3 | 34.3 | 50.6 | 41.7 | 48.1 | 38 | 33.7 | 48.9 | Pr | 2.68 | 5.16 | 4.28 | 5.75 | 4.41 | 4.53 | 6.52 | 6.13 | 3.89 | 5.92 | 5.06 | 5.72 | 4.44 | 3.65 | 6.03 | Nd | 10.1 | 20.4 | 17.5 | 20.4 | 17.6 | 17.6 | 26.1 | 24.1 | 14.7 | 23 | 19.2 | 21.6 | 18.6 | 13.9 | 25.5 | Sm | 2.81 | 4.82 | 4.02 | 4.28 | 4.02 | 3.82 | 5.98 | 5.65 | 2.99 | 5 | 4.59 | 4.98 | 4.16 | 2.97 | 5.52 | Eu | 0.58 | 1.02 | 0.97 | 0.75 | 0.86 | 0.97 | 1.09 | 0.95 | 0.56 | 1.04 | 0.79 | 1.01 | 0.86 | 0.46 | 1.24 | Gd | 4.84 | 4.79 | 3.98 | 3.87 | 3.35 | 3.31 | 5.42 | 4.86 | 2.59 | 4.72 | 4.18 | 4.58 | 3.71 | 2.2 | 4.75 | Tb | 1.26 | 0.88 | 0.7 | 0.8 | 0.54 | 0.53 | 0.95 | 0.86 | 0.47 | 0.79 | 0.7 | 0.76 | 0.59 | 0.35 | 0.72 | Dy | 9.43 | 5.57 | 4.37 | 5.38 | 3.14 | 3.24 | 5.47 | 5.47 | 3.04 | 4.85 | 4.14 | 4.51 | 3.76 | 2.12 | 4.24 | Ho | 2.29 | 1.25 | 0.96 | 1.25 | 0.66 | 0.72 | 1.16 | 1.23 | 0.69 | 1.06 | 0.92 | 0.97 | 0.84 | 0.45 | 0.89 | Er | 7.28 | 3.65 | 2.76 | 3.84 | 1.74 | 2.15 | 3.37 | 3.58 | 2.09 | 3.18 | 2.76 | 2.85 | 2.43 | 1.26 | 2.48 | Tm | 1.14 | 0.56 | 0.42 | 0.63 | 0.25 | 0.35 | 0.52 | 0.56 | 0.33 | 0.48 | 0.42 | 0.44 | 0.39 | 0.2 | 0.38 | Yb | 7.52 | 3.68 | 2.81 | 4.37 | 1.73 | 2.47 | 3.55 | 3.68 | 2.29 | 3.29 | 2.84 | 2.87 | 2.57 | 1.4 | 2.51 | Lu | 1.22 | 0.6 | 0.48 | 0.7 | 0.3 | 0.4 | 0.56 | 0.58 | 0.38 | 0.54 | 0.46 | 0.46 | 0.43 | 0.24 | 0.4 | Y | 65.7 | 35.3 | 25.1 | 33.1 | 17.2 | 19.6 | 32.4 | 32.6 | 19.8 | 29.1 | 25.3 | 26.6 | 24.4 | 13.2 | 24.9 | Cs | 11.35 | 7.47 | 1.07 | 2.31 | 0.68 | 0.87 | 0.87 | 1.09 | 0.9 | 0.97 | 1.02 | 1.24 | 0.88 | 0.44 | 0.81 | Rb | 101 | 83.1 | 54.5 | 64.3 | 33.1 | 49.3 | 32.4 | 37.7 | 27.7 | 29.4 | 38.2 | 30.4 | 25.1 | 31.4 | 34.7 | Ba | 392 | 612 | 724 | 390 | 263 | 521 | 293 | 253 | 186.5 | 200 | 235 | 245 | 187 | 290 | 283 | Th | 11.3 | 6.6 | 4.25 | 8.46 | 2.78 | 4 | 6.34 | 6.83 | 5.08 | 6.51 | 5.99 | 5.68 | 5.68 | 3.71 | 3.97 | U | 2.57 | 2.04 | 1.65 | 2.82 | 1.19 | 1.34 | 2.06 | 2.24 | 1.67 | 2.04 | 1.99 | 1.68 | 1.62 | 1.09 | 1.4 | Nb | 13.3 | 9.7 | 6 | 13.4 | 5 | 4.9 | 9.2 | 10.2 | 7.9 | 8.9 | 8.9 | 9.8 | 8 | 4.2 | 5 | Ta | 0.8 | 0.6 | 0.3 | 0.9 | 0.3 | 0.3 | 0.5 | 0.6 | 0.4 | 0.6 | 0.6 | 0.6 | 0.4 | 0.3 | 0.3 | Cr | 120 | 210 | 130 | 20 | 240 | 140 | 10 | 30 | 10 | 10 | 20 | 40 | 40 | 30 | 80 | Ga | 23.2 | 19.6 | 14.5 | 17.5 | 10.3 | 14.4 | 12.3 | 15.4 | 11.8 | 13.2 | 12.9 | 13.8 | 10.3 | 13.8 | 14.4 | Hf | 14.8 | 5.8 | 4.4 | 7.3 | 6 | 4.3 | 5.3 | 6.2 | 4.4 | 5.7 | 4.9 | 5 | 4.4 | 3 | 3.8 | Sr | 67.9 | 112 | 201 | 140 | 94.4 | 168.5 | 130.5 | 130.5 | 89 | 98.1 | 95.9 | 133.5 | 124.5 | 96.3 | 187 | V | 79 | 103 | 80 | 73 | 73 | 61 | 60 | 51 | 62 | 73 | 51 | 104 | 65 | 37 | 64 | Zr | 641 | 224 | 163 | 279 | 258 | 154 | 211 | 238 | 170 | 217 | 197 | 208 | 170 | 108 | 143 | MnO/Zr | 1.25 | 4.91 | 5.52 | 1.79 | 2.33 | 3.9 | 3.32 | 3.78 | 8.82 | 5.99 | 4.06 | 8.65 | 9.41 | 7.41 | 13.99 | Y/Ho | 28.69 | 28.24 | 26.15 | 26.48 | 26.06 | 27.22 | 27.93 | 26.5 | 28.7 | 27.45 | 27.5 | 27.42 | 29.05 | 29.33 | 27.98 | LaN/YbN | 1.15 | 3.64 | 3.67 | 3.62 | 5.85 | 4.84 | 4.59 | 5.15 | 4.72 | 4.77 | 4.86 | 5.14 | 4.71 | 9.03 | 5.44 | | 0.48 | 0.65 | 0.74 | 0.56 | 0.71 | 0.83 | 0.58 | 0.55 | 0.61 | 0.65 | 0.55 | 0.64 | 0.67 | 0.55 | 0.74 | | 87.55 | 115.3 | 91.15 | 126.3 | 88.3 | 95.39 | 137.8 | 140.9 | 84.22 | 127.6 | 108.1 | 120.6 | 98.58 | 81.5 | 123.7 |
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