Research Article
The Distribution and Origin of Carbonate Cements in Deep-Buried Sandstones in the Central Junggar Basin, Northwest China
Table 1
Composition from EDX analysis of carbonate cements in sandstone of Block 3.
| Well | Depth/m | Content/% | Na2O | MgO | Al2O3 | SiO2 | CaO | MnO | Fe2O3 | K2O |
| Y1 | 6117.38 | | | 2.22 | 5.54 | 82.59 | 4.31 | 5.35 | |
| Y2 | 5970.53 | | 17.48 | | 5.55 | 47.38 | 4.43 | 25.16 | | 6001.23 | | 19.00 | | 6.79 | 63.28 | 6.41 | 4.52 | |
| Y3 | 5614.22 | 1.37 | 13.92 | 3.33 | 8.70 | 43.33 | 3.47 | 24.45 | | 5868.00 | | 1.59 | 3.04 | 4.78 | 79.22 | 5.95 | 5.04 | 0.37 |
| Y6 | 6028.60 | | 21.22 | | | 52.30 | 3.63 | 22.85 | | 6084.00 | | | 1.36 | 5.26 | 91.04 | | 2.34 | |
| Y7 | 6095.00 | | | 1.27 | 2.45 | 92.39 | 1.76 | 2.13 | | 6101.55 | | 3.84 | 4.56 | 15.13 | 45.61 | 7.50 | 22.51 | 0.84 |
| Y8 | 6088.55 | | 21.43 | 2.44 | 1.99 | 51.05 | | 23.08 | | 6096.20 | | | 0.95 | 9.21 | 85.44 | | 4.02 | 0.38 |
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