Analyzing the Origin of Low Resistivity in Gas-Bearing Tight Sandstone Reservoir

Table 3

Calculated and measured values of the array laterolog response for well X-B-2.

Layer number	Depth (m)	Calculated results					Measured results
		RLA1 (Ω·m)	RLA2 (Ω·m)	RLA3 (Ω·m)	RLA4 (Ω·m)	RLA5 (Ω·m)	RLA1 (Ω·m)	RLA2 (Ω·m)	RLA3 (Ω·m)	RLA4 (Ω·m)	RLA5 (Ω·m)
1	3767.2	7.06	8.68	10.35	12.41	16.52	7.27	8.38	9.80	11.18	17.59
2	3767.5	6.28	7.70	10.03	10.93	15.52	7.32	8.34	9.94	11.84	18.19
3	3767.8	7.96	8.65	9.94	11.40	18.68	7.22	8.04	9.72	11.92	18.37
4	3768.1	7.86	9.54	9.85	10.65	17.57	7.76	8.74	10.44	12.94	20.54
5	3768.4	6.92	8.19	9.39	11.35	18.01	6.60	7.45	8.64	10.52	17.19
6	3768.7	7.49	7.80	9.12	10.53	16.77	6.55	7.29	8.40	10.11	16.83
……	……	……	……	……	……	……	……	……	……	……	……
37	3778.0	5.47	6.15	7.66	10.84	16.61	5.66	6.48	7.99	10.59	15.72
38	3778.3	5.34	5.90	7.23	9.09	15.36	4.92	5.77	7.43	9.73	13.54
39	3778.6	5.51	6.07	7.43	9.32	15.70	5.02	6.17	7.93	9.59	13.34
40	3778.9	4.73	5.35	6.71	8.14	12.91	4.75	5.87	6.90	7.99	11.72
41	3779.2	5.13	6.39	7.44	9.12	13.04	4.94	5.65	6.55	7.68	12.05
42	3779.5	5.57	7.28	7.50	8.27	13.46	5.87	6.67	7.94	9.71	15.98
Average relative error (%)							7.61	7.93	6.08	8.92	8.77