Predicting the Healthy Operation of Heavy Oil Well Casings in Permafrost Regions

Table 4

Parameters of the contact properties.

Layer	Soil type	Tangential direction		Cohesive force (MPa)	Damage
		Friction coefficient	Elastic sliding		Initial value	Evolution	Stability coefficient
1	Gravel and sand	0.624	0.05	0.1	0.05	0.1	0.001
2	Silt	0.531	0.1	0.4	0.1	0.2	0.001
3	Silty sand	0.624	0.05	0.75	0.05	0.1	0.001
4	Clay	0.268	0.1	1.0	0.1	0.2	0.001
5	Sand	0.624	0.05	0.75	0.05	0.1	0.001
6	Clayey silt	0.531	0.1	0.5	0.1	0.2	0.001
7	Silty clay	0.268	0.1	0.75	0.1	0.2	0.001
8	Silt	0.531	0.1	0.4	0.1	0.2	0.001
9	Sand	0.624	0.05	0.75	0.05	0.1	0.001
10	Silt	0.531	0.1	0.4	0.1	0.2	0.001
11	Sand	0.624	0.05	0.6	0.05	0.1	0.001
12	Clay	0.268	0.1	1.0	0.1	0.2	0.001
13	Silty sand	0.624	0.05	0.75	0.05	0.1	0.001
14	Clay	0.268	0.1	1.0	0.1	0.2	0.001