Wells – Processes – Placing fluid into the formation
Patent
1979-05-07
1981-01-20
Leppink, James A.
Wells
Processes
Placing fluid into the formation
166280, 166308, E21B 4327
Patent
active
042457025
ABSTRACT:
A fracturing and acidization method for increasing the productivity of relatively hard acid-soluble formations about a perforated well, comprising the steps of producing a formation fracture containing a viscous fluid and propping agent; injecting an acid solution having a viscosity value fifty times less than the contained viscous fluid into the fluid filled fracture, thereby forming etched channels in the fracture walls and displacing the propping agent from such channels; and lowering the fluid pressure in the fracture to allow the walls thereof to become displaced towards a closing position until held open by the propping agent. Channels so formed have a greater width than can be formed by conventional techniques and consequently substantially increase the productivity of such formations.
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De Vries Willem
Haafkens Rudolf
Luque Rafael F.
Leppink James A.
Shell Internationale Research Maatschappij B.V.
Suchfield George A.
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