Method for increasing the productivity of a well penetrating...

Details Method for increasing the productivity of a well penetrating... Method for increasing the productivity of a well penetrating...

E - Fixed Constructions

21

B

166/25

E21B 43/27 (2006.01) C09K 8/62 (2006.01) C09K 8/72 (2006.01) E21B 43/26 (2006.01)

Patent

CA 1112153

ABSTRACT METHOD FOR INCREASING THE PRODUCTIVITY OF A WELL PENETRATING AN UNDERGROUND FORMATION A low-viscosity acid is injected into a fracture containing a high-viscosity fluid. The injection takes place through perforations in the casing or production tubing, and the acid follows fingering flow paths in the fracture. The perforations are widely spaced (at least 60 centimetres distance between the perforations) to prevent merging of these flow paths close to the well.

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