Re-fracturing simulations: Pressure-dependent SRV and shear dilation of natural fractures ///

The concept of shear dilation of natural fractures is not new. Chipperfield et al1 wrote about the process of slipping planes self-locking into place, due to irregularities along the rock surface when fluid is injected into them. This mechanism of slipping and self-locking leads to enhanced permeability, even after the pressure drops with time during production (degree of permeability retention in the natural fractures), which is what is described as leading to an SRV region near the wellbore.

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