Method for treating a subterranean formation

C - Chemistry – Metallurgy – 09 – K

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C09K 8/72 (2006.01) E21B 43/267 (2006.01) E21B 43/27 (2006.01)

Patent

CA 2547185

Disclosed are acid fracturing methods for subterranean siliceous formations employing a viscous dissolving fluid to create a permeable conduit that bypasses the near wellbore damage. The viscous dissolving fluids used according to the invention are acid-fracturing treatment fluids containing a dissolving agent viscosified with a material such as a viscoelastic surfactant, and the fluid is injected into a sandstone formation at a pressure sufficient to create a hydraulic fracture. Also, the viscous dissolving fluid leaks off into the faces of the fracture thus "stimulating" the formation. Hence when the hydraulic fracture has closed there is a part of the formation that has been effectively stimulated, creating a pathway for fluids to preferentially flow to the wellbore. The formation may then be flowed back to produce a substantial volume of the treatment fluid.

La présente invention concerne des méthodes de fracturation aux acides pour des formations siliceuses, qui font appel à un fluide de dissolution visqueux pour créer un conduit perméable qui contourne les dommages d'un puits qui se trouve à proximité. Conformément à l'invention, les fluides de dissolution visqueux utilisés sont des fluides de traitement de fracturatation aux acides qui contiennent un agent de dissolution dont la viscosité a été améliorée avec une substance comme un agent de surface viscoélastique, et le fluide est injecté dans une formation de grès à une pression suffisante pour créer une fracture hydraulique. De plus, le fluide de dissolution visqueux s'échappe des surfaces de la fracture, ce qui « stimule » la formation. Ainsi, lorsque la fracture hydraulique se referme, une partie de ladite formation a été effectivement stimulée, ce qui crée une voie permettant aux fluides de s'écouler, préférablement vers le puits. L'écoulement de la formation peut alors être renversé afin de produire une quantité substantielle de fluide de traitement.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method for treating a subterranean formation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for treating a subterranean formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for treating a subterranean formation will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1553940

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.