Methods of forming packs in a plurality of perforations in a...

E - Fixed Constructions – 21 – B

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E21B 33/13 (2006.01) E21B 43/04 (2006.01) E21B 43/11 (2006.01) E21B 43/25 (2006.01)

Patent

CA 2617279

The invention provides a method of forming packs in a plurality of perforations (142) in a casing (104) of a wellbore, the method comprising the steps of : (a) forming a plug (136) of a plugging particulate material in the wellbore of the casing, wherein the plug covers at least one perforation in the casing; (b) forming a pack (124) of a first packing particulate material in at least one perforation located above the plug in the casing; (c) removing at least an upper portion of the plug to expose the at least one perforation in the casing that had been previously covered by at least the upper portion of the plug; and (d) forming a pack of a second packing particulate material in the at least one perforation exposed by removing at least the upper portion of the plug, wherein the second packing particulate material can be the same or different from the first packing particulate material .

La présente invention concerne un procédé permettant de constituer des amas dans une pluralité de perforations (142) situées dans le tubage (104) d~un puits de forage. Le procédé comprend différentes étapes qui consistent à : (a) former un bouchon (136) de matériau particulaire d~obturation dans le tubage du puits de forage, le bouchon couvrant au moins une perforation dans le tubage ; (b) constituer un amas (124) composé d~un premier matériau particulaire de remplissage dans au moins une perforation située dans le tubage au-dessus du bouchon ; (c) retirer au moins une partie supérieure du bouchon afin d~exposer la perforation située dans le tubage qui a été couverte précédemment par au moins la partie supérieure du bouchon ; et (d) former un amas à partir d~un second matériau particulaire de remplissage dans la perforation exposée en retirant au moins la partie supérieure du bouchon, le second matériau de remplissage pouvant être identique ou différer du premier matériau particulaire de remplissage.

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