In Situ Stress Distribution and Its Control on the Coalbed Methane Reservoir Permeability in Liulin Area, Eastern Ordos Basin, China

Table 1

Injection/falloff and in situ stress test parameters in the Liulin area.

Sample	(m)	(mD)	(°C)	(MPa)	(MPa)	(MPa)	(MPa)	(MP)	(MPa)
Well 1	479.32	0.83	23.61	4.39	8.82	9.42	8.82	13.45	12.94	0.86
Well 2	486.91	1.43	25.35	2.94	6.98	8.17	6.98	10.63	13.15	0.67
Well 3	488.00	0.03	24.57	3.62	11.04	12.12	11.04	18.17	13.18	1.11
Well 4	495.25	0.06	24.72	4.21	9.31	10.42	9.31	14.10	13.37	0.88
Well 5	539.50	1.92	26.55	4.82	6.50	7.75	6.50	7.73	14.57	0.49
Well 6	540.05	0.09	28.35	2.23	12.66	14.16	12.66	22.39	14.58	1.20
Well 7	553.66	0.16	28.60	5.07	13.24	13.67	13.24	21.78	14.95	1.17
Well 8	562.59	0.06	28.40	5.10	13.31	13.60	13.31	22.03	15.19	1.16
Well 9	564.80	0.64	N	2.58	8.19	9.19	8.19	13.60	15.25	0.71
Well 10	577.45	0.28	28.00	2.95	12.15	13.36	12.15	20.94	15.59	1.06
Well 11	584.35	0.08	26.80	4.94	15.00	15.11	15.00	25.75	15.78	1.29
Well 12	585.75	0.04	28.20	3.03	10.40	11.48	10.40	17.49	15.82	0.88
Well 13	611.26	0.12	29.30	5.43	16.01	17.56	16.01	25.84	16.50	1.27
Well 14	617.30	0.10	31.10	5.42	14.82	15.22	14.82	24.62	16.67	1.18
Well 15	620.74	N	N	N	17.73	18.99	17.73	29.54	16.76	1.41
Well 16	624.23	N	N	N	12.61	12.87	12.61	21.23	16.85	1.00
Well 17	671.55	0.26	28.75	5.41	13.00	13.60	13.00	20.79	18.13	0.93
Well 18	678.55	0.13	29.00	5.59	13.42	13.96	13.42	21.51	18.32	0.95
Well 19	698.76	0.06	30.10	6.29	14.38	15.22	14.38	22.43	18.87	0.98
Well 20	710.10	0.11	30.06	7.49	15.71	17.04	15.71	23.40	19.17	1.02
Well 21	719.54	0.06	30.71	6.82	16.47	17.16	16.47	26.23	19.43	1.10
Well 22	746.19	0.11	30.20	8.33	16.10	16.88	16.10	23.89	20.15	0.99
Well 23	759.33	0.26	28.70	6.58	13.43	11.33	13.43	23.18	20.50	0.89
Well 24	760.97	0.02	28.20	6.55	13.63	14.47	13.63	20.67	20.55	0.83
Well 25	760.97	0.18	30.50	8.41	15.67	16.81	15.67	22.59	20.55	0.93
Well 26	769.48	0.62	33.15	8.25	14.48	16.03	14.48	19.96	20.78	0.83
Well 27	817.16	N	N	N	14.73	18.42	14.73	18.09	22.06	0.74
Well 28	862.83	N	N	N	12.11	12.55	12.11	18.22	23.30	0.65
Well 29	871.96	1.70	27.76	6.43	13.65	14.22	13.65	21.10	23.54	0.74
Well 30	913.68	N	N	N	11.39	12.76	11.39	15.43	24.67	0.54
Well 31	965.15	0.07	35.90	8.90	17.72	18.05	17.72	27.01	26.06	0.86
Well 32	973.90	0.21	36.80	9.05	16.85	17.59	16.85	24.71	26.30	0.79
Well 33	1013.59	1.39	32.67	7.85	14.87	15.47	14.87	22.09	27.37	0.68
Well 34	1016.00	0.18	38.50	9.34	16.89	18.29	16.89	23.84	27.43	0.74
Well 35	1019.85	2.26	32.52	7.08	16.42	20.91	16.42	22.07	27.54	0.70