Productivity for Horizontal Wells in Low-Permeability Reservoir with Oil/Water Two-Phase Flow

Table 1

The parameters of reservoir and fluid properties.

Variables	value
Porosity, 0/ (fraction)	0.05
Drainage radius, 𝑟𝑒 (m)	600
Horizontal well length, 𝐿 (m)	300
Initial permeability of the reservoir, 𝑘𝑖 (D)	2×10^−3
Cumulative fluid production, ∑𝑄𝑙 (m^3)	1.14×10^6
Oil viscosity in the reservoir, 𝜇𝑜 (mPa·s)	3
Formation thickness, ℎ (m)	20
Initial reservoir pressure, 𝑝𝑒 (MPa)	30
Permeability modulus, 𝛼𝑘 (MPa^−1)	0.1
Water saturation in the bottomhole, 𝑆𝑤𝐵 (fraction)	0.6
Threshold pressure gradient, 𝐺 (MPa/m)	0.001
Water viscosity in the reservoir, 𝜇𝑤 (mPa·s)	1