Research Article
Geochemistry of Formation Water and Implications for Ultradeep Tight Sandstone of DK Gas Field in Kuqa Depression
Table 3
X-ray diffraction experimental results of tight sandstone samples of Cretaceous Bashijiqike Formation in Kuqa Depression.
| | Sample ID | Depth/m | Clay | Quartz | Potassium feldspar | Plagioclase | Calcite | Dolomite | Pyrite | Anhydrite |
| | DK-1 | 6345.21 | 6 | 57 | 6 | 14 | 1 | 13 | — | 3 | | DK-2 | 6348.17 | 4 | 49 | 10 | 18 | 1 | 6 | — | 12 | | DK-3 | 6408.50 | 5 | 54 | 10 | 21 | 10 | 0 | — | — | | DK-4 | 6427.45 | 4 | 51 | 8 | 22 | 15 | 0 | — | — | | DK-5 | 6487.05 | 3 | 48 | 9 | 30 | 3 | 7 | — | — | | DK-6 | 6353.66 | 5 | 60 | 9 | 16 | 6 | 4 | — | — | | DK-7 | 6485.85 | 2 | 49 | 8 | 27 | 2 | 12 | — | — | | DK-8 | 5971.93 | 5 | 55 | 3 | 30 | 7 | 0 | — | — | | DK-9 | 6765.05 | 3 | 65 | 8 | 20 | 4 | 0 | — | — | | DK-10 | 6797.82 | 3 | 69 | 7 | 16 | 2 | 3 | — | — | | DK-11 | 6931.70 | 7 | 48 | 11 | 26 | 1 | 7 | — | — | | DK-12 | 7086.44 | 3 | 55 | 6 | 28 | 2 | 6 | — | — | | DK-13 | 7085.35 | 5 | 51 | 8 | 28 | 6 | 2 | — | — | | DK-14 | 7091.02 | 3 | 55 | 5 | 30 | 2 | 5 | — | — | | DK-15 | 6801.74 | 5 | 57 | 8 | 22 | 2 | 6 | — | — | | DK-16 | 6806.94 | 5 | 57 | 8 | 24 | 1 | 5 | — | — | | DK-17 | 6737.78 | 4 | 57 | 8 | 19 | 1 | 9 | — | 2 | | DK-18 | 6717.59 | 3 | 65 | 7 | 17 | 2 | 4 | — | 2 | | DK-19 | 6957.16 | 2 | 49 | 12 | 28 | 5 | 2 | — | 2 | | DK-20 | 6964.52 | 4 | 51 | 14 | 25 | 1 | 2 | 1 | 2 | | DK-21 | 6419.85 | 12 | 59 | 7 | 16 | 5 | 1 | — | — | | DK-22 | 6424.56 | 12 | 65 | 5 | 11 | 7 | 0 | — | — | | DK-23 | 6507.60 | 11 | 58 | 8 | 19 | 3 | 1 | — | — | | DK-24 | 6735.39 | 2 | 63 | 3 | 22 | 1 | 5 | — | 4 |
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