Estimation of Elasticity of Porous Rock Based on Mineral Composition and Microstructure

Table 1

Compression experimental results of sandstones.

Sample number	Mineralogy (vol %)				Average particle size (μm)	Density (g·cm^−3)	Average void ratio (%)	Pore distribution (%)			Pressure (MPa)	Compressibility coefficients; MPa^−1  × 10^6
	Quartz	Feldspar	Shard clay	Others				Among particle	Pore wall	Micro; pore		𝑎𝐴	𝑎𝐵	𝑎𝐶
1	80	0	18	2	65	2.01	24.1	34	23	43	10	36.2	43.6	26.0
2	85	8	7	0	175	1.98	23.8	67	11	22	100	32.7	24.0	29.3
3	70	15	12	3	90	2.02	22.7	35	14	51	30	42.0	41.8	43.0
4	83	10	3	4	220	1.78	30.5	72	4	24	50	43.1	40.8	35.0
5	65	5	28	2	95	2.00	23.5	50	10	40	10	64.8	94.2	105.0
6	65	5	28	2	95	2.00	23.5	50	10	40	50	44.1	55.2	54.9
7	65	5	28	2	95	2.00	23.5	50	10	40	100	42.0	51.4	50.1
8	80	9	4	7	80	2.21	15.6	57	26	17	30	25.5	31.8	45.4
9	80	9	4	7	80	2.21	15.6	57	26	17	50	22.6	26.8	36.5
10	80	9	4	7	80	2.21	15.6	57	26	17	100	20.2	22.9	30.9
11	94	0	1	5	120	2.14	17.8	72	13	15	10	46.1	54.2	64.0
12	94	0	1	5	120	2.14	17.8	72	13	15	30	28.9	26.8	32.5
13	94	0	1	5	120	2.14	17.8	72	13	15	100	24.0	22.8	23.1
14	95	3	2	0	170	2.13	18.1	76	14	10	10	40.1	50.5	34.0
15	95	3	2	0	170	2.13	18.1	76	14	10	100	19.9	21.6	18.5
16	95	0	5	0	130	2.03	21.7	76	10	14	30	32.8	29.0	30.2
17	98	0	2	0	350	2.33	10.6	69	17	14	10	24.3	27.6	34.1
18	98	0	2	0	350	2.33	10.6	69	17	14	50	14.1	15.6	15.8
19	96	1	2	1	115	1.94	24.1	70	14	16	30	33.2	35.9	35.4
20	96	1	2	1	115	1.94	24.1	70	14	16	100	25.0	28.8	26.0
21	90	2	1	7	100	2.18	16.8	60	19	21	10	34.3	26.2	36.8
22	90	2	1	7	100	2.18	16.8	60	19	21	50	21.8	24.0	23.2
23	92	0	8	0	120	2.42	8.5	24	13	63	50	27.5	22.2	18.9
24	92	0	8	0	120	2.42	8.5	24	13	63	30	36.5	28.5	22.7
25	90	4	6	0	145	2.01	23.4	69	11	20	10	43.4	44.8	50.0
26	70	15	12	3	90	2.02	22.7	35	14	51	10	86.0	67.2	86.4
27	83	5	8	4	65	1.91	27.3	68	10	22	10	63.6	63.8	65.9
28	83	5	8	4	65	1.91	27.3	68	10	22	30	48.5	47.2	53.8
29	85	8	7	0	175	1.98	23.8	67	11	22	30	49.4	49.8	55.1
30	83	10	3	4	220	1.78	30.5	72	4	24	10	46.8	46.4	38.4
31	94	0	1	5	120	2.41	17.8	72	13	15	50	26	24.9	27
32	95	0	5	0	130	2.03	21.7	76	10	14	50	31	26.4	27.3
33	80	9	4	7	80	2.21	15.6	57	26	17	10	34.4	48.6	82.9
34	96	1	2	1	115	1.94	24.1	70	14	16	10	47.8	50.5	50.4
35	90	4	6	0	145	2.01	23.4	69	11	20	100	29	24.3	27
36	90	4	6	0	145	2.01	23.4	69	11	20	50	30.5	27.4	30.9
37	75	9	15	1	85	2.96	25.9	40	16	44	30	58.1	57	55.1