Study on fracture propagation behavior in ultra-heavy oil reservoirs based on true triaxial experiments

LIN Botao,SHI Can,ZHUANG Li,YOU Hongjuan,HUANG Yong

Table 2 Petrophysical and rock mechanical parameters of artificial and natural reservoir samples.

Parameter Value Artificial reservoir sample Natural reservoir sample Viscosity (20 °C) 7×104 mPa·s 1×105 mPa·s Mud content 35% 35% Oil saturation 70.6% 67.1% Porosity 23.2% 22.0% Water permeability 3.5×10-3 μm2 2.9×10-3 μm2 Elasticity Modulus 345 MPa 476 MPa Poisson's ratio 0.4 0.4 Inner friction angle 34.4° 30.7° Cohesion 0.63 MPa 1.12 MPa Dilatant angle 14.0° 20.2°