Table 3. Result Summary for the Dynamic Elastic Moduli.

geomechanical moduli	condition	Berea Buff	Berea Spider	Bandera Brown	Parker
Young’s modulus (E) (GPa)	before	16.28	16.87	12.82	35.26
	after	9.77	12.78	7.88	31.31
	alteration percentage, %	–40	–24	–39	–11
Poisson’s ratio	before	0.12	0.16	0.23	0.13
	after	0.29	0.33	0.37	0.32
	alteration percentage, %	134	107	62	155
bulk modulus (K) (GPa)	before	7.21	8.28	7.91	15.74
	after	7.73	12.72	10.23	29.42
	alteration percentage, %	7	54	29	87
shear modulus (G) (GPa)	before	7.25	7.27	5.21	15.65
	after	3.79	4.80	2.87	11.84
	alteration percentage, %	–48	–34	–45	–24
uniaxial compaction modulus (H), GPa	before	16.87	17.97	14.86	36.61
	after	12.78	19.12	14.06	45.21
	alteration percentage, %	–24	6	–5	23
Lamé’s parameter (λ) (GPa)	before	2.38	3.43	4.44	5.31
	after	5.20	9.52	8.32	21.53
	alteration percentage, %	119	177	87	306