0 引言
1 实验及结果
1.1 实验样品
1.2 声波波速测量
1.3 单三轴压缩实验
2 陆相页岩横观各向同性参数计算
3 页岩油储层地层压力计算
4 水平地应力计算
4.1 各向同性模型
4.2 横观各向同性模型
4.3 构造应变系数反演
5 实例应用
表1 各模型计算水平地应力结果对比Table 1 Comparison results of horizontal in-situ stress calculated by different models |
井号 | 深度/m | 实测应力值 | 组合弹簧模型 | 黄荣樽模型 | 横观各向同性模型 | ||||
---|---|---|---|---|---|---|---|---|---|
σ H/MPa | σ h/MPa | σ H/MPa | σ h/MPa | σ H/MPa | σ h/MPa | σ H/MPa | σ h/MPa | ||
A井 | 4 605 | 94.57 | 83.32 | 84.63 | 69.24 | 75.43 | 62.44 | 103.23 | 81.60 |
4 642 | 94.23 | 84.02 | 87.02 | 73.29 | 79.36 | 66.16 | 100.87 | 83.39 | |
4 680 | 100.84 | 86.58 | 90.36 | 77.60 | 83.52 | 69.83 | 97.92 | 81.71 | |
4 723 | 102.89 | 88.06 | 90.61 | 74.03 | 79.49 | 65.29 | 109.32 | 85.14 | |
4 750 | 102.25 | 88.44 | 91.95 | 75.57 | 80.84 | 66.97 | 110.91 | 89.94 | |
4 780 | 104.41 | 89.65 | 88.70 | 73.49 | 79.94 | 65.99 | 111.96 | 89.70 | |
4 824 | 105.79 | 90.85 | 93.80 | 78.41 | 83.89 | 69.88 | 113.29 | 89.48 | |
B井 | 4 319 | 91.34 | 78.41 | 99.94 | 90.79 | 90.43 | 74.45 | 94.03 | 77.12 |
4 355 | 96.68 | 79.40 | 102.06 | 90.25 | 89.97 | 73.75 | 95.54 | 78.39 | |
4 396.5 | 95.80 | 80.16 | 103.53 | 89.84 | 89.08 | 72.35 | 100.34 | 82.34 | |
4 418 | 95.51 | 79.48 | 103.12 | 90.70 | 89.32 | 72.20 | 97.49 | 79.44 | |
C井 | 4 376 | 88.91 | 76.25 | 98.16 | 84.86 | 79.35 | 68.43 | 90.72 | 76.16 |
4 432 | 90.18 | 77.29 | 102.85 | 88.45 | 78.84 | 67.56 | 93.64 | 79.25 | |
平均相对误差/% | 10.19 | 14.13 | 14.29 | 16.86 | 5.00 | 1.79 |