Table 4 Ground stress test results of Chang 7 acoustic emission in block Y of M oilfield.
Well name | Vertical depth (m) | Maximum ground stress (MPa) | Minimum ground stress (MPa) | Maximum and minimum stress difference (MPa) | Vertical stress (MPa) | Horizontal stress difference coefficient |
|---|---|---|---|---|---|---|
L-1 | 2468.47 | 69.37 | 56.38 | 12.99 | 50.63 | 0.23 |
L-1 | 2465.23 | 65.60 | 51.33 | 14.27 | 55.60 | 0.28 |
L-2 | 2398.00 | 66.39 | 52.75 | 13.64 | 60.13 | 0.26 |
L-3 | 2387.00 | 75.40 | 53.73 | 21.67 | 55.52 | 0.40 |
L-3 | 2383.90 | 71.81 | 54.89 | 16.92 | 52.38 | 0.31 |
L-4 | 2343.00 | 63.63 | 50.43 | 13.20 | 51.69 | 0.26 |
L-4 | 2344.00 | 59.04 | 46.75 | 12.29 | 61.02 | 0.26 |
L-5 | 2262.37 | 59.42 | 49.26 | 10.16 | 55.62 | 0.21 |
L-5 | 2263.78 | 67.26 | 48.75 | 18.51 | 52.21 | 0.38 |
L-6 | 2358.10 | 66.74 | 47.02 | 19.72 | 49.72 | 0.42 |
L-8 | 2499.70 | 65.23 | 50.20 | 15.03 | 55.27 | 0.30 |
