Analytical Modeling and Contradictions in Limestone Reservoirs: Breccias, Vugs, and Fractures

Table 1

Data and parameters of limestone reservoir A.

Parameters	Symbol	Values
Initial reservoir pressure		3.450 10^7 Pa
Bubble-point pressure		1.717 10^7 Pa
Reservoir depth		2726 m
Formation thickness		2.5 m
Primary porosity		0.015 (fraction)
Primary permeability		395 10^−17 m^2
Secondary porosity		0.15 (fraction)
Secondary permeability		158 10^−10 m^2
Oil viscosity		0.00038 Pa·s
Reservoir temperature		121.85°C
Oil specific gravity (15.6°C)		0.8156 (dimensionless)
Oil specific gravity^*		0.745 (dimensionless)

^*Oil specific gravity at 121.85°C was determined by , where δ = exp(0.0106 ×  °API − 8.05) [72]. Oil API gravity was 42°API.