Reservoir Evaluation and Development ›› 2021, Vol. 11 ›› Issue (1): 47-55.doi: 10.13809/j.cnki.cn32-1825/te.2021.01.007
• Shale Gas Exploration • Previous Articles Next Articles
Zhang Guangrong1,2(),Nie Haikuan3,4(
),Tang Xuan1,2,Zhang Peixian5,Peng Yongmin3,4
Received:
2020-06-28
Online:
2021-02-04
Published:
2021-02-26
Contact:
Nie Haikuan
E-mail:2106180043@cugb.edu.cn;niehk.syky@sinopec.com
CLC Number:
Guangrong Zhang,Haikuan Nie,Xuan Tang, et al. Evaluation of shale gas preservation conditions based on formation water index: A case study of Wufeng-Longmaxi Formation in Southeastern Chongqing[J]. Reservoir Evaluation and Development, 2021, 11(1): 47-55.
Table 1
Sampling data of some wells in Wufeng-Longmaxi Formation in Southeastern Chongqing"
井位 | 深度(m) | 采样时间(d) |
---|---|---|
PY1HF | 2 136~2 159 | 47~1 245 |
PY2HF | 2 233~2 260 | 4~157 |
PY3HF | 2 753~2 780 | 192~1 005 |
PY4HF | 1 899~1 915 | 10~269 |
LY1 | 2 818~2 824 | 124~133 |
NY1HF | 4 399~4 406 | 165~497 |
JY1HF | 2 408~2 419 | 96~218 |
JY1-3HF | 2 409~2 417 | 0~45 |
Table 3
Ion content of Wufeng-Longmaxi Formation in Southeastern Chongqing"
井位 | 离子含量(g/L) | 总矿化度(g/L) | 埋深(m) | ||||||
---|---|---|---|---|---|---|---|---|---|
K++Na+ | Ca2+ | Mg2+ | Cl- | SO42- | HCO3- | ||||
PY1HF | 范围值 | 10.884~22.510 | 0.585~1.053 | 0.046~0.157 | 17.219~36.470 | 0.041~0.566 | 0.186~0.623 | 29.8~54.6 | 2 136~2 159 |
平均值 | 14.851 | 0.776 | 0.076 | 27.705 | 0.234 | 0.376 | 43.98 | ||
PY2HF | 范围值 | 4.674~12.992 | 0.310~0.613 | 0.032~0.054 | 9.359~25.294 | 0.005~0.070 | 0.310~0.650 | 15.0~39.2 | 2 233~2 260 |
平均值 | 8.546 | 0.392 | 0.048 | 15.095 | 0.040 | 0.549 | 24.64 | ||
PY3HF | 范围值 | 13.120~21.380 | 0.078~0.991 | 0.012~0.117 | 24.066~39.298 | 0.032~0.165 | 0.310~0.652 | 38.0~59.3 | 2 753~2 780 |
平均值 | 16.085 | 0.830 | 0.072 | 31.102 | 0.104 | 0.376 | 48.58 | ||
PY4HF | 范围值 | 4.989~13.273 | 0.299~0.761 | 0.005~0.095 | 8.895~27.881 | 0.036~0.114 | 0.124~0.898 | 15.1~42.1 | 1 899~1 915 |
平均值 | 11.354 | 0.600 | 0.071 | 23.928 | 0.068 | 0.289 | 36.28 | ||
LY1 | 范围值 | 11.516~11.770 | 0.245~0.269 | 0.038~0.105 | 11.174~11.528 | 8.991~9.117 | 0.888~0.941 | 32.9~33.5 | 2 818~2 824 |
平均值 | 11.618 | 0.257 | 0.065 | 11.344 | 9.052 | 0.900 | 33.25 | ||
NY1HF | 范围值 | 7.759~10.819 | 0.147~1.634 | 0.004~0.029 | 13.423~25.295 | 0.004~0.138 | 0.279~1.582 | 23.5~38.3 | 4 399~4 406 |
平均值 | 9.160 | 0.327 | 0.017 | 17.050 | 0.051 | 0.647 | 27.26 | ||
JY1HF | 范围值 | 1.384~14.200 | 0.049~0.373 | 0.022~0.081 | 1.926~21.509 | 0.021~0.360 | 1.448~1.550 | 4.1~37.9 | 2 408~2 419 |
平均值 | 6.515 | 0.174 | 0.043 | 9.542 | 0.229 | 1.316 | 17.75 | ||
JY1-3HF | 范围值 | 1.372~5.877 | 0.162~0.249 | 0.095~0.113 | 1.385~8.666 | 0.123~0.823 | 1.491~1.538 | 5.4~16.4 | 2 409~2 417 |
平均值 | 3.625 | 0.205 | 0.104 | 5.026 | 0.473 | 1.514 | 10.90 |
Table 4
Geochemical index of typical wells in Southeastern Chongqing"
井号 | 变质系数 | 钠氯系数 | 钙镁系数 | 脱硫系数 | 碳酸盐平衡系数 | 水型 | 埋深(m) | |
---|---|---|---|---|---|---|---|---|
PY1HF | 范围值 | 54.04~411.72 | 0.41~0.72 | 6.24~17.19 | 0.11~3.29 | 0.19~1.07 | CaCl2 | 2 136~2 159 |
平均值 | 204.76 | 0.54 | 11.63 | 1.17 | 0.56 | |||
PY2HF | 范围值 | 65.95~238.04 | 0.48~0.70 | 6.60~12.90 | 0.03~0.42 | 0.59~1.91 | CaCl2 | 2 233~2 260 |
平均值 | 141.42 | 0.56 | 8.33 | 0.26 | 1.52 | |||
PY3HF | 范围值 | 84.43~961.09 | 0.45~0.68 | 6.60~32.50 | 0.13~0.45 | CaCl2 | 2 753~2 780 | |
平均值 | 315.75 | 0.51 | 13.21 | 0.33 | ||||
PY4HF | 范围值 | 146.87~1 209.20 | 0.46~0.54 | 6.10~65.04 | 0.16~1.27 | CaCl2 | 1 899~1 915 | |
平均值 | 279.33 | 0.47 | 14.26 | 0.32 | ||||
LY1 | 范围值 | 1.02~1.03 | 2.38~6.85 | 77.99~81.36 | 3.30~3.69 | Na2SO4 | 2 818~2 824 | |
平均值 | 1.024 | 4.35 | 79.81 | 3.51 | ||||
NY1HF | 范围值 | 267.47~856.79 | 0.40~0.69 | 9.74~67.98 | 0.03~1.06 | 0.26~5.95 | CaCl2 | 4 399~4 406 |
平均值 | 493.20 | 0.51 | 19.83 | 0.39 | 2.60 | |||
JY1HF | 范围值 | 6.04~712.45 | 0.02~0.90 | 1.98~12.37 | 1.07~14.40 | 1.21~29.39 | CaCl2 | 2 408~2 419 |
平均值 | 206.54 | 0.59 | 4.46 | 6.29 | 10.47 | |||
JY1-3HF | 范围值 | 12.23~91.12 | 1.70~2.20 | 1.40~37.28 | 6.18~9.21 | NaHCO3 | 2 409~2 417 | |
平均值 | 51.67 | 1.95 | 19.34 | 7.70 |
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