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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