Numerical Simulation and Sensitivity Analysis of Hydraulic Fracturing in Multilayered Thin Tight Sandstone Gas Reservoir

Table 4

Lithologies and geological parameters of different layers in Taiyuan formation of well X-1.

Lithology	Top depth (m)	Bottom depth (m)	Thickness (m)	Geostress (MPa)	Elastic modulus (10^4 MPa)	Poisson’s ratio	Sg (%)	Poro (%)	Perm (mD)
Mudstone	1801.7	1809.9	8.2	30.2	3.32	0.30	0	0.69	0.01
Dry sandstone	1809.9	1811.5	1.6	28.4	3.65	0.26	0	6.27	0.19
Coal	1811.5	1812.5	1	28.1	3.21	0.26	0	1.75	0.04
Mudstone	1812.5	1814.8	2.3	27.6	3.35	0.24	0	0.06	0
Coal	1814.8	1817.8	3	34.7	0.77	0.36	0	0.73	0.01
Dry sandstone	1817.8	1820.6	2.8	29.4	2.40	0.28	0	4.85	0.08
Poor gas sandstone	1820.6	1823	2.4	27	4.25	0.23	17.02	4.63	0.08
Dry sandstone	1823	1826.1	3.1	26.9	4.86	0.23	2.28	3.22	0.05
Mudstone	1826.1	1830.3	4.2	28.1	4.66	0.26	0	1.75	0.02
Coal	1830.3	1831.6	1.3	32.8	0.88	0.33	0	0.12	0
Dry sandstone	1831.6	1836.5	4.9	27.3	4.93	0.23	0.81	2.82	0.04
Rich gas sandstone	1836.5	1841.3	4.8	25.5	4.55	0.20	48.92	9.04	1.26
Dry sandstone	1841.3	1842	0.7	27.2	4.52	0.23	0	8.58	0.50
Rich gas sandstone	1842	1843.4	1.4	25	4.48	0.18	28.51	9.66	1.13
Dry sandstone	1843.4	1849.2	5.8	29.2	5.62	0.27	8.14	4.34	0.16
Mudstone	1849.2	1851.5	2.3	29.7	6.09	0.27	0	0.82	0.01
Dry sandstone	1851.5	1854.2	4.8	28.55	3.90	0.25	0	4.16	0.10
Coal	1856.3	1859.1	12.2	36.3	0.61	0.37	0	0.14	0
Mudstone	1868.5	1871.1	2.6	34.2	2.53	0.34	0	0.01	0
Coal	1871.1	1872	0.9	33.1	1.38	0.33	0	0.01	0