Interaction Law between Natural Fractures-Vugs and Acid-Etched Fracture during Steering Acid Fracturing in Carbonate Reservoirs

Table 1

Physical properties of experimental specimen.

Property	Fracture-vug carbonate rock	Matrix-type carbonate rock	Unit
Modulus of elasticity	33	35	GPa
Poisson’s ratio	0.2	0.2	—
Porosity	3.1	2.8	%
Permeability	0.1	0.1	mD
Compressive strength	102.01	103.78	MPa
Reservoir pressure coefficient	1.1	1.1	—
Coefficient of in situ stress difference	14–15	14–15	%