Rock Mechanical Properties and Breakdown Pressure of High-Temperature and High-Pressure Reservoirs in the Southern Margin of Junggar Basin

Table 1

Test scheme and results of high-temperature and high-pressure rock mechanical properties of rock samples from Toutunhe formation in the Sikeshu sag.

No.	Lithology	Confining pressure (MPa)	Temperature (°C)	Pore pressure (MPa)	Tensile strength (MPa)	Elastic modulus (GPa)	Poisson’s ratio	Compressive strength (MPa)
1#	Argillaceous siltstone	110	150	80	6.86, 8.79 9.58, 6.81 4.33, 6.46 6.10, 8.41	21.91, 19.11	0.402, 0.388	369.0, 290.3
2#		90	150	60		21.31, 19.44	0.387, 0.398	359.6, 274.4
3#		60	150	30		18.64, 20.12	0.377, 0.396	258.2, 206.0
4#		30	150	0		18.97, 16.11	0.394, 0.380	205.0, 177.2
5#		110	25	80		28.64, 27.92	0.191, 0.213	415.7, 379.1
6#		30	25	0		32.93, 34.91	0.221, 0.221	258.2, 285.8
7#	Medium-fine grained sandstone	110	150	80	5.27, 8.47 6.46, 5.43	26.83, 24.69	0.273, 0.265	359.0, 331.2
8#		90	150	60		28.33, 21.31	0.268, 0.260	290.2, 302.4
9#		60	150	30		25.64, 22.27	0.261, 0.245	260.3, 256.9
10#		30	150	0		24.55, 19.57	0.248, 0.237	222.2, 208.3
11#		110	25	80		13.29, 15.26	0.226, 0.194	258.7, 256.9
12#		30	25	0		26.26, 30.13	0.242, 0.261	289.2, 287.7
13#	Glutenite	110	150	80		35.23, 35.09	0.232, 0.220	403.4, 431.8
14#		90	150	60	3.70, 6.92 7.82, 5.60	38.68, 30.43	0.238, 0.217	377.6, 341.7
15#		60	150	30		34.06, 36.41	0.231, 0.206	346.2, 290.8
16#		30	150	0		34.71, 33.62	0.217, 0.194	239.6, 269.0
17#		110	25	80		35.56, 16.91	0.259, 0.184	436.0, 253.2
18#		30	25	0		38.60, 40.43	0.338, 0.191	256.8, 260.0