Method for controlling fluid loss from wells into high conductiv

Details Method for controlling fluid loss from wells into high conductiv Method for controlling fluid loss from wells into high conductiv

1995-04-10

1996-06-25

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166 50, 166300, 166309, 175 48, 175 72, E21B 33138, E21B 2108, E21B 2114

Patent

active

055291236

ABSTRACT:
A method of reducing fluid loss into a highly conductive formation interval during drilling and completion of a well through such an interval wherein a foamed cement slurry, including an acid or oil soluble component, is injected into the well and forced into the conductive portions of the formation zone, which may comprise a fractured or rubblized formation portion. The cement is allowed to harden or set at a porosity of at least 15%, followed by resuming drilling and, in completing the well, dissolving the soluble component to increase the permeability of or disintegrate the cement to permit production of formation fluids into the well.

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