Research Article
Geochemical Characteristics and Productivity Response of Produced Water from Coalbed Methane Wells in the Yuwang Block, Eastern Yunnan, China
Table 2
Conventional ion data and hydrogen and oxygen isotope data from water samples.
| | CBM wells | Date | K+ | Na+ | Ca2+ | Mg2+ | Cl- | SO42- | HCO3- | δ13CDIC | δ18O | δD | | mg/L | mg/L | mg/L | mg/L | mg/L | mg/L | mg/L | ‰V-PDB | ‰V-SMOW | ‰V-SMOW |
| | L-1 | Apr. 2018 | 391.24 | 2337.93 | 22.77 | 9.62 | 3693.08 | 40.27 | 756.37 | -5.11 | -9.82 | -58.54 | | May 2018 | 388.14 | 2841.09 | 21.73 | 11.96 | 3566.23 | 22.89 | 899.61 | -5.21 | -10.09 | -72.55 | | Jun. 2018 | 448.06 | 2507 | 5.79 | 11.28 | 3622.01 | 19.57 | 1085.56 | -5.12 | -10.5 | -70.69 | | Jul. 2018 | 430.12 | 2393.63 | 19.22 | 9.48 | 3192 | 15.89 | 1483.55 | -5.39 | -10.42 | -68.35 | | Aug. 2018 | 271.02 | 2127.24 | 15.31 | 7.69 | 2841.46 | 17.33 | 1687 | -4.67 | -10.71 | -71.73 | | Sep. 2018 | 160.01 | 2006.09 | 12.35 | 5.08 | 2242.71 | 12.93 | 1830.97 | -4.57 | -11.03 | -72.2 | | Oct. 2018 | 153.98 | 1927.91 | 9.55 | 4.49 | 2083.21 | 8.47 | 1896.7 | -4.25 | -11.26 | -74.51 | | Nov. 2018 | 148.36 | 1966.38 | 8.14 | 4.63 | 1955.64 | 8.89 | 1931.12 | -4.36 | -11.38 | -81.57 | | Mean | 298.87 | 2263.41 | 14.36 | 8.03 | 2899.54 | 18.28 | 1446.36 | -4.84 | -10.65 | -71.27 |
| | L-2 | Apr. 2018 | 653.81 | 3022.21 | 33.37 | 12.4 | 4742.68 | 34.82 | 1389.61 | -7.96 | -10.47 | -72.97 | | May 2018 | 413.98 | 2979.6 | 22.48 | 8.59 | 3392.58 | 24.2 | 1683.62 | -8.13 | -10.98 | -82.04 | | Jun. 2018 | 360.69 | 2711.59 | 18.91 | 7.73 | 2941.82 | 24.38 | 1826.85 | -8.02 | -11.68 | -80.69 | | Jul. 2018 | 298.37 | 2416.54 | 16.39 | 6.57 | 2539.78 | 19.89 | 2400.6 | -8.19 | -11.11 | -76.28 | | Aug. 2018 | 233.85 | 2202.94 | 17.2 | 5.54 | 2112.89 | 17.87 | 2519.54 | -7.91 | -11.76 | -82.18 | | Sep. 2018 | 242.97 | 2191.07 | 12.93 | 4.85 | 2315.7 | 14.61 | 2463.2 | -8.23 | -11.9 | -83.77 | | Oct. 2018 | 223.84 | 2121.72 | 10.76 | 4.42 | 2197.32 | 11.88 | 2475.72 | -8.45 | -11.76 | -81.82 | | Nov. 2018 | 220.1 | 2238.44 | 9.63 | 4.61 | 2101.83 | 10.3 | 2516.41 | -8.50 | -12.06 | -86.66 | | Mean | 330.95 | 2485.51 | 17.71 | 6.84 | 2793.08 | 19.74 | 2159.44 | -8.17 | -11.46 | -80.80 |
| | L-3 | May 2018 | 253.39 | 2192.75 | 29.47 | 9.42 | 2953.54 | 19.78 | 562.88 | -8.43 | -11.38 | -84.88 | | Jun. 2018 | 179.97 | 1635.28 | 18.14 | 6.30 | 2072.06 | 22.75 | 731.24 | -8.64 | -12.30 | -84.57 | | Jul. 2018 | 133.49 | 1328.21 | 12.14 | 4.29 | 1560.49 | 17.57 | 895.14 | -9.01 | -11.38 | -78.95 | | Aug. 2018 | 97.87 | 1045.43 | 12.68 | 2.84 | 1203.64 | 15.36 | 960.87 | -8.49 | -12.36 | -86.08 | | Sep. 2018 | 75.52 | 865.79 | 7.19 | 2.17 | 983.43 | 13.21 | 1042.24 | -8.32 | -12.29 | -85.39 | | Oct. 2018 | 66.06 | 909.12 | 6.23 | 1.80 | 822.17 | 11.34 | 1032.85 | -8.29 | -12.51 | -86.65 | | Nov. 2018 | 51.37 | 827.43 | 4.61 | 1.20 | 604.21 | 9.03 | 1070.41 | -8.36 | -10.94 | -78.20 | | Mean | 122.52 | 1257.72 | 12.92 | 4.00 | 1457.08 | 15.58 | 899.38 | -8.51 | -11.88 | -83.53 |
| | L-4 | May 2018 | 362.71 | 3228.39 | 19.29 | 9.29 | 3436.52 | 0.37 | 2168.6 | -5.18 | -11.59 | -78.69 | | Jun. 2018 | 330.54 | 3123.74 | 14.79 | 8.89 | 3235.61 | 0.19 | 2291.73 | -5.12 | -11.76 | -79.1 | | Jul. 2018 | 276.25 | 2883.28 | 20.35 | 7.92 | 2813.12 | 0.20 | 2967.11 | -5.12 | -11.09 | -74.36 | | Aug. 2018 | 235.56 | 2734.76 | 22.92 | 7.11 | 2702.08 | 0.32 | 3045.35 | -4.13 | -11.89 | -78.54 | | Sep. 2018 | 206.35 | 2564.84 | 17.49 | 5.46 | 2454.66 | 0.46 | 3170.55 | -4.11 | -11.69 | -79.46 | | Oct. 2018 | 200.69 | 2565.69 | 17.31 | 5.60 | 2358.30 | 0.42 | 3233.15 | -4.18 | -11.72 | -79.57 | | Nov. 2018 | 207.43 | 2564.53 | 16.43 | 5.96 | 2255.89 | 0.30 | 3358.34 | -4.38 | -11.82 | -83.97 | | Mean | 259.93 | 2809.32 | 18.37 | 7.18 | 2750.88 | 0.32 | 2890.69 | -4.60 | -11.65 | -79.10 |
| | L-5 | May 2018 | 348.91 | 2609.78 | 9.92 | 7.31 | 2637.24 | 3.87 | 1084.65 | -6.42 | -11.95 | -82.34 | | Jun. 2018 | 227.40 | 2270.35 | 10.42 | 5.70 | 2302.85 | 0.05 | 956.49 | -6.39 | -12.11 | -82.41 | | Jul. 2018 | 174.65 | 2077.51 | 11.55 | 4.81 | 1995.86 | 3.88 | 1325.18 | -6.76 | -11.37 | -77.65 | | Aug. 2018 | 150.75 | 1867.78 | 15.81 | 4.42 | 1811.29 | 4.24 | 1425.33 | -6.15 | -11.49 | -81.43 | | Sep. 2018 | 136.65 | 1766.55 | 9.44 | 3.36 | 1554.92 | 3.33 | 1522.36 | -6.06 | -12.03 | -83.38 | | Oct. 2018 | 116.04 | 1757.51 | 7.66 | 3.00 | 1422.65 | 0.09 | 1525.49 | -5.97 | -12.01 | -82.06 | | Nov. 2018 | 114.00 | 1746.44 | 7.30 | 3.04 | 1345.38 | 0.96 | 1569.30 | -6.02 | -10.28 | -80.61 | | Mean | 181.20 | 2013.70 | 10.30 | 4.52 | 1867.17 | 2.35 | 1344.11 | -6.25 | -11.61 | -81.41 |
| | L-6 | May 2018 | 348.91 | 2609.78 | 9.92 | 7.31 | 2637.24 | 3.87 | 1884.65 | -4.93 | -11.95 | -82.34 | | Jun. 2018 | 299.72 | 2501.88 | 7.52 | 6.54 | 2525.99 | 1.61 | 1939.93 | -5.53 | -11.92 | -82.2 | | Jul. 2018 | 259.45 | 2316.31 | 11.08 | 6.55 | 2383.26 | 1.13 | 2381.82 | -5.52 | -11.25 | -77.2 | | Aug. 2018 | 213.25 | 2093.49 | 15.42 | 5.5 | 2171.06 | 0.29 | 2488.24 | -4.84 | -12.12 | -81.7 | | Sep. 2018 | 197.32 | 2006.94 | 11.07 | 4.38 | 1910.23 | 0.74 | 2600.91 | -4.79 | -12.03 | -83.96 | | Oct. 2018 | 207.93 | 2011.09 | 10.51 | 4.44 | 1803.25 | 0.09 | 2660.38 | -4.36 | -12.06 | -83.23 | | Nov. 2018 | 181.62 | 2060.99 | 9.48 | 4.42 | 1649.12 | 0.13 | 2760.54 | -4.43 | -11.52 | -84.52 | | Mean | 244.03 | 2228.64 | 10.71 | 5.59 | 2154.31 | 1.12 | 2388.07 | -4.91 | -11.84 | -82.16 |
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