Research Article
Application of Multiphysics Coupling FEM on Open Wellbore Shrinkage and Casing Remaining Strength in an Incomplete Borehole in Deep Salt Formation
Table 3
The parameters for computational model.
| Casing property | | Density (kg/m3) | 7800 | Poisson’s ratio | 0.28 | Expansion coefficient (10−6/K) | 12.0 | Thermal conductivity (W/(m·K)) | 45.0 | Specific heat capacity (J/(kg·K)) | 460.0 | Specification (mm) | | Cement property | | Density (kg/m3) | 1380 | Poisson’s ratio | 0.25 | Expansion coefficient (10−6/K) | 10.5 | Thermal conductivity (W/(m·K)) | 0.9 | Specific heat capacity (J/(kg·K)) | 865.0 | Thickness (mm) | 9.5 | Sandstone property | | Density (kg/m3) | 2570 | Poisson’s ratio | 0.16 | Expansion coefficient (10−6/K) | 10.1 | Thermal conductivity (W/(m·K)) | 2.5 | Specific heat capacity (J/(kg·K)) | 762.0 | Thickness (mm) | | Salt rock property | | Density (kg/m3) | 2280 | Poisson’s ratio | 0.35 | Expansion coefficient (10−6/K) | 10.3 | Thermal conductivity (W/(m·K)) | 4.8 | Specific heat capacity (J/(kg·K)) | 869.0 | Thickness (mm) | 400 | Drilling mud property | | Density (kg/m3) | 1608 | Thermal conductivity (W/(m·K)) | 1.6 | Specific heat capacity (J/(kg·K)) | 1674.8 | Model depth (m) | 3950–3952 | Wellbore diameter (mm) | 165.1 | Sandstone stress in situ (MPa) | | | 121.25 | | 50.94 | | 45.88 | Salt rock stress in situ (MPa) | | | 121.25 | | 58.54 | | 53.45 |
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