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

Table 2

Soil layer division and other physical and mechanical parameters.

Layer	Soil type	Depth (m)	Poisson’s ratio		Young’s modulus (MPa)		Confining pressure correlation index a	Coefficient of shrinkage of thawed soil (%)
			F	T	F	T
1	Gravel & sand	0∼30	0.30	0.35	777.0	58.0	0.499	1.81
2	Silt	30∼54	0.35	0.40	767.0	84.0	0.2	2.09
3	Silty sand	54∼63	0.30	0.35	777.0	58.0	0.499	1.99
4	Clay	63∼69	0.40	0.45	737.5	62.0	0.1	3.21
5	Sand	69∼81	0.30	0.35	777.0	58.0	0.499	1.10
6	Clayey silt	81∼90	0.35	0.40	767.0	84.0	0.2	3.13
7	Silty clay	90∼96	0.40	0.45	737.5	62.0	0.1	3.35
8	Silt	96∼102	0.35	0.40	767.0	84.0	0.2	2.02
9	Sand	102∼135	0.30	0.35	777.0	64.0	0.447	1.31
10	Silt	135∼147	0.35	0.40	767.0	84.0	0.2	1.07
11	Sand	147∼153	0.30	0.35	777.0	54.5	0.532	1.47
12	Clay	153∼156	0.40	0.45	737.5	62.0	0.1	1.66
13	Silty sand	156∼162	0.3	0.35	777.0	54.5	0.532	1.24
14	Clay	162∼171	0.4	0.45	737.5	62.3	0.1	1.75