Reservoir Evaluation and Development ›› 2021, Vol. 11 ›› Issue (2): 176-183.doi: 10.13809/j.cnki.cn32-1825/te.2021.02.005
• Shale Gas Exploration • Previous Articles Next Articles
ZHOU Hua(),WEI Limin,WANG Tong,WANG Yan,PANG Heqing,ZHANG Tiancao
Received:
2020-10-20
Online:
2021-04-30
Published:
2021-04-26
CLC Number:
Hua ZHOU,Limin WEI,Tong WANG, et al. Evaluation method of Weirong deep shale gas reservoir and its application[J]. Reservoir Evaluation and Development, 2021, 11(2): 176-183.
Table 1
Evaluation criteria for shale gas reservoir of Longmaxi Formation[8,9,10]"
评价 分类 | 评价参数 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
TOC(%) | 含气量(m3/t) | 孔隙度(%) | 脆性矿物含量(%) | 黏土矿物含量(%) | 层理缝 | |||||||||||
中国石化 | 中国石油 | 中国石化 | 中国石油 | 中国石化 | 中国石油 | 中国石化 | 中国石油 | 中国石化 | 中国石油 | 中国石化 | ||||||
Ⅰ类 | ≥4 | ≥3 | ≥4 | ≥3 | ≥6 | ≥5 | ≥50 | ≥55 | ≤30 | ≤30 | 发育—极发育 | |||||
Ⅱ类 | 2 ~ 4 | 2 ~ 3 | 2 ~ 4 | 2 ~ 3 | 4 ~ 6 | 3 ~ 5 | 40 ~ 50 | 45 ~ 55 | 30 ~ 50 | 30 ~ 40 | 较发育 | |||||
Ⅲ类 | <2 | 1 ~ 2 | <2 | 1 ~ 2 | 2 ~ 4 | 2 ~ 3 | <40 | 30 ~ 45 | >50 | 40 ~ 60 | 欠发育 |
Table 2
Evaluation parameters of deep shale reservoir in Weirong Deep Shale Gas Field"
储层类型 | TOC(N=5) (%) | 含气量(N=5) (m3/t) | 有机孔占比 (N=5)(%) | 脆性矿物含量(N=5)(%) | 黏土矿物含量(N=5)(%) | 脆性指数 (N=4)(%) | 水平应力差异 (N=4)系数 | |
---|---|---|---|---|---|---|---|---|
黏土质 页岩储层 | 范围 平均 | 1.05 ~ 1.47 1.20 | 2.32 ~ 2.98 2.65 | 8.7 ~ 11.6 10.00 | 42.37 ~ 46.89 43.70 | 50.97 ~ 52.49 51.80 | 20.7 ~ 28.5 25.90 | 0.15 ~ 0.28 0.20 |
硅质-钙质- 黏土质页岩储层 | 范围 平均 | 2.62 ~ 3.52 2.90 | 6.98 ~ 7.99 7.35 | 13.2 ~ 20.6 15.00 | 61.39 ~ 64.59 62.40 | 33.03 ~ 33.76 33.50 | 41.5 ~ 46.5 44.30 | 0.08 ~ 0.23 0.17 |
硅质-黏土质 页岩储层 | 范围 平均 | 2.41 ~ 3.61 3.00 | 6.34 ~ 7.78 7.18 | 17.9 ~ 25.6 20.30 | 47.40 ~ 60.16 52.35 | 32.22 ~ 47.95 42.10 | 33.9 ~ 42.0 38.90 | 0.07 ~ 0.20 0.15 |
黏土质-硅质 页岩储层 | 范围 平均 | 1.20 ~ 5.29 3.40 | 8.51 ~ 13.31 12.18 | 20.7 ~ 61.6 38.80 | 55.94 ~ 60.71 59.20 | 32.59 ~ 38.45 35.60 | 43.6 ~ 59.1 51.10 | 0.10 ~ 0.28 0.19 |
生物硅质 页岩储层 | 范围 平均 | 3.23 ~ 5.31 4.60 | 9.11 ~ 12.76 11.48 | 42.6 ~ 78.8 69.70 | 71.73 ~ 76.39 74.20 | 14.59 ~ 20.43 18.30 | 32.3 ~ 50.5 42.05 | 0.05 ~ 0.25 0.16 |
含钙-黏土质- 硅质页岩储层 | 范围 平均 | 2.98 ~ 5.55 4.80 | 6.74 ~ 11.31 10.00 | 35.67 ~ 62.15 59.80 | 60.76 ~ 69.61 64.70 | 27.38 ~ 34.28 30.00 | 39.4 ~ 54.8 49.95 | 0.09 ~ 0.24 0.17 |
钙质-黏土质- 硅质页岩储层 | 范围 平均 | 1.74 ~ 5.10 3.90 | 4.61 ~ 10.29 7.79 | 27.36 ~ 57.29 49.80 | 62.69 ~ 72.67 67.10 | 25.19 ~ 31.73 28.70 | 44.9 ~ 51.6 47.40 | 0.07 ~ 0.21 0.15 |
Table 3
Gray incidence matrix under different parent sequence conditions"
母序列 | 子序列的灰色关联度 | ||||||
---|---|---|---|---|---|---|---|
TOC | 含气量 | 有机孔占比 | 脆性矿物含量 | 黏土矿物含量 | 脆性指数 | 水平应力差异系数 | |
TOC | 1.000 0 | 0.844 4 | 0.747 7 | 0.785 1 | 0.571 3 | 0.722 8 | 0.452 7 |
含气量 | 0.849 8 | 1.000 0 | 0.755 3 | 0.747 3 | 0.606 4 | 0.757 7 | 0.477 6 |
有机孔占比 | 0.747 3 | 0.747 2 | 1.000 0 | 0.690 2 | 0.679 7 | 0.624 8 | 0.563 3 |
脆性矿物含量 | 0.784 8 | 0.738 4 | 0.690 2 | 1.000 0 | 0.501 3 | 0.853 0 | 0.390 6 |
黏土矿物含量 | 0.491 8 | 0.518 0 | 0.609 4 | 0.421 3 | 1.000 0 | 0.414 1 | 0.548 9 |
可压裂指数 | 0.731 7 | 0.757 7 | 0.634 9 | 0.858 9 | 0.504 1 | 1.000 0 | 0.388 3 |
水平应力差异系数 | 0.463 8 | 0.477 6 | 0.573 5 | 0.402 5 | 0.633 3 | 0.388 3 | 1.000 0 |
平均值 | 0.724 2 | 0.726 2 | 0.715 9 | 0.700 8 | 0.642 3 | 0.680 1 | 0.545 9 |
Table 4
Weight coefficients of reservoir evaluation parameters in Weirong Deep Shale Gas Field"
母序列 | 子序列的权重系数 | ||||||
---|---|---|---|---|---|---|---|
TOC | 含气量 | 有机孔占比 | 脆性矿物含量 | 黏土矿物含量 | 脆性指数 | 水平应力差异系数 | |
TOC | 0.195 2 | 0.164 8 | 0.145 9 | 0.153 2 | 0.111 5 | 0.141 1 | 0.088 3 |
含气量 | 0.163 6 | 0.192 5 | 0.145 4 | 0.143 9 | 0.116 7 | 0.145 9 | 0.092 0 |
有机孔占比 | 0.147 9 | 0.147 9 | 0.197 9 | 0.136 6 | 0.134 5 | 0.123 7 | 0.111 5 |
脆性矿物含量 | 0.158 3 | 0.148 9 | 0.139 2 | 0.201 7 | 0.101 1 | 0.172 0 | 0.078 8 |
黏土矿物含量 | 0.122 8 | 0.129 4 | 0.152 2 | 0.105 2 | 0.249 8 | 0.103 4 | 0.137 1 |
可压裂指数 | 0.150 1 | 0.155 4 | 0.130 2 | 0.176 2 | 0.103 4 | 0.205 1 | 0.079 6 |
水平应力差异系数 | 0.117 7 | 0.121 2 | 0.145 6 | 0.102 2 | 0.160 8 | 0.098 6 | 0.253 9 |
Table 5
Comprehensive evaluation index of deep shale reservoir in Weirong Deep Shale Gas Field"
储层类型 | 不同母序列条件下的储层品质综合评价指标 | ||||||
---|---|---|---|---|---|---|---|
TOC | 含气量 | 有机孔占比 | 脆性矿物含量 | 黏土矿物含量 | 脆性指数 | 水平应力差异系数 | |
黏土质页岩储层 | 0.300 0 | 0.296 2 | 0.273 4 | 0.334 3 | 0.227 7 | 0.339 4 | 0.232 7 |
硅质-钙质-黏土质页岩储层 | 0.546 3 | 0.542 3 | 0.498 2 | 0.577 4 | 0.459 2 | 0.583 3 | 0.415 7 |
硅质-黏土质页岩储层 | 0.510 1 | 0.505 1 | 0.465 9 | 0.532 3 | 0.411 0 | 0.537 4 | 0.386 3 |
黏土质-硅质页岩储层 | 0.682 4 | 0.686 5 | 0.637 6 | 0.703 1 | 0.566 6 | 0.712 2 | 0.516 1 |
生物硅质页岩储层 | 0.840 9 | 0.834 7 | 0.816 0 | 0.852 2 | 0.755 6 | 0.846 3 | 0.677 3 |
含钙-黏土质-硅质页岩储层 | 0.765 6 | 0.754 9 | 0.729 9 | 0.774 9 | 0.654 9 | 0.772 4 | 0.598 5 |
钙质-黏土质-硅质页岩储层 | 0.683 7 | 0.673 7 | 0.653 2 | 0.704 2 | 0.595 3 | 0.701 9 | 0.541 4 |
Table 6
Quality classification of deep shale reservoir in Weirong Deep Shale Gas Field"
储层类型 | 分布 | 综合评价指标 | 储层品质等级 | |
---|---|---|---|---|
区间值 | 中值 | |||
黏土质页岩储层 | ⑤—⑨ | 0.23 ~ 0.34 | 0.29 | D |
硅质-钙质-黏土质页岩储层 | 33—4 | 0.42 ~ 0.58 | 0.52 | B—C |
硅质-黏土质页岩储层 | 32 | 0.39 ~ 0.54 | 0.48 | B—C |
黏土质-硅质页岩储层 | 31-2 | 0.52 ~ 0.71 | 0.64 | B |
生物硅质页岩储层 | 31-1 | 0.68 ~ 0.85 | 0.80 | A |
含钙-黏土质-硅质页岩储层 | 2 | 0.60 ~ 0.77 | 0.72 | A |
钙质-黏土质-硅质页岩储层 | 11 | 0.54 ~ 0.70 | 0.65 | B |
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