Nonlinear Vibration Analysis of Tubing Strings in Underground Gas Storage Using Multiscale Wavelet Transform

Table 4

Near-wall pressure test results and field results.

Number	Vertical well section (MPa)		Inclined well section (MPa)		Horizontal section #1 (MPa)		Horizontal section #2 (MPa)
	Test	Field	Test	Field	Test	Field	Test	Field
1	21.23	20.20	20.97	19.68	18.92	18.17	17.98	17.17
2	21.19	19.50	20.92	19.01	21.48	20.56	20.44	19.47
3	20.56	18.96	20.17	18.46	23.42	22.30	22.42	21.25
4	18.82	17.72	19.68	19.12	25.71	24.42	24.71	23.32
5	11.17	10.19	25.051	24.40	25.06	23.94	23.97	22.76
6	10.53	9.42	24.54	21.79	23.42	22.34	22.42	21.28
7	16.33	16.62	20.87	19.01	23.05	21.99	22.05	20.93
8	17.02	16.14	16.81	15.76	22.32	21.29	21.25	20.17
Average value	17.17	16.09	21.12	19.63	22.92	21.85	21.95	20.80
Relative error (%)	6.27		7.58		4.82		5.31
Variance	3.99	3.85	2.47	2.37	1.97	1.83	1.96	1.81