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

Table 5

Measured and predicted rock compressibility coefficients.

Sample number	Measured			ANN prediction			SVM prediction			PSO-SVM prediction
	𝑎𝐴	𝑎𝐵	𝑎𝐶	𝑎𝐴	𝑎𝐵	𝑎𝐶	𝑎𝐴	𝑎𝐵	𝑎𝐶	𝑎𝐴	𝑎𝐵	𝑎𝐶
1	26.0	24.9	27.0	25.0	25.2	24.3	23.2	23.9	24.8	27.1	24.6	28.5
2	31.0	26.4	27.3	30.0	29.4	25.6	26.8	23.4	25.0	32.1	27.9	28.0
3	34.4	48.6	82.9	59.9	65.1	87.0	30.5	34.1	49.8	42.2	54.4	79.6
4	47.8	50.5	50.4	41.9	39.7	43.9	41.4	43.8	43.8	41.9	55.2	57.7
5	29.0	24.3	27.0	28.1	26.8	24.1	27.5	22.8	25.6	30.1	26.1	26.5
6	30.5	27.4	30.9	34.8	33.0	32.3	33.3	29.6	35.6	31.2	31.5	32.1
7	58.1	57	55.1	54.9	61.6	69.9	40.2	43.8	43	55.1	60.6	62.9