Model simplifies filter cake lift-off pressure determination

A simple, effective model is available for estimating filter cake lift-off pressure, an important factor affecting the productivity of horizontal wells.Filter-cake cleanup during flow back is crucial because complete cake removal increases flow area and minimizes skin pressure drops. Residual filter cakes can severely impair the productivity of gravel packs, screens, and liners and result in high-velocity flow regimes in certain parts of the formation. These regimes could induce borehole weakening, sand production, and gas or water coning.1The flow initiation pressure is directly correlated with the extent of solids invasion. It represents mostly internal core cleanup rather than actual f...

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