Study on Micro Displacement Mechanism of Hydraulic Fracturing by Oil Displacement Agent at High Pressure

Table 3

The measurement results of core pore parameters under different displacement methods.

Experimental scheme	Maximum pore radius (μm)	Average pore radius (μm)
Core original parameters (before displacement)	13.82	4.736
Core original parameters (after fracturing and driving by surfactant) (20 MPa)	21.23	7.401