Research Article
Casing Damage Prediction Model Based on the Data-Driven Method
Table 2
Data overview of 244 production layer samples.
| | Symbol | Influencing factors | Unit | Minimum | Maximum | Average |
| | f0 | Wellhead abscissa | M | — | — | — | | f1 | Wellhead ordinate | M | — | — | — | | f2 | Perforation top | M | 827 | 1408.7 | 1067.1 | | f3 | Perforation bottom | M | 833.8 | 1412.4 | 1071.1 | | f4 | Perforation thickness | M | 1.0 | 14.0 | 3.9 | | f5 | Perforation density | hole/m | 10 | 32 | — | | f6 | Perforator phasing | degree | 90 | 135 | — | | f7 | Casing wall thickness | mm | 6.2 | 9.17 | — | | f8 | Casing steel grade | | J55, K55, N80, P110 | | | | f9 | Sand layer top | M | 826.9 | 1408.7 | 1066.6 | | f10 | Sand layer bottom | M | 833.8 | 1412.4 | 1072.6 | | f11 | Sand layer thickness | M | 1 | 19.2 | 5.9 | | f12 | Reservoir group | | Ming II, Ming III | | | | f13 | Permeability | mD | 162.9 | 5431.1 | 1415.7 | | f14 | Porosity | % | 20.2 | 72.1 | 34.4 | | f15 | Qlmax | m3/d | 1.2 | 359.7 | 27.9 | | f16 | Max water cut | % | 28.7 | 100 | 90.9 | | f17 | Max fluid production intensity | m3/m | 0.31 | 67.36 | 7.82 | | f18 | Qlcum | m3 | 19.6 | 2,123,576 | 59,579 | | f19 | Qlmax/KH | 1000m3/(d·mD·m) | 0.14 | 125.08 | 7.01 | | f20 | Qlmax/HN | m3/d/hole | 0.02 | 5.18 | 0.55 | | f21 | Casing service time | Annual | 0.48 | 50.34 | 15.16 | | f22 | Sand layer production time | Annual | 0.18 | 41.79 | 10.7 |
|
|
