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US 11,692,425 B2Granted
Method and downhole apparatus to accelerate wormhole initiation and propagation during matrix acidizing of a subterranean rock formation
AssigneeSchlumberger Technology Corporation
InventorsZiad Sidaoui, Mustapha Abbad
Life of this patent
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Abstract
The present disclosure relates to downhole tools and related methods that accelerate wormhole initiation and propagation during matrix acidizing of a hydrocarbon-bearing subterranean rock formation.
Claims24
A method for stimulating recovery of hydrocarbons from a subterranean rock formation traversed by a wellbore, comprising:
- deploying a downhole tool at a treatment zone of the wellbore;
- operating said downhole tool to create at least one notch in a wellbore surface at the treatment zone;
- and
- operating said downhole tool to supply a stimulating fluid to the treatment zone at a pressure less than formation breakdown pressure, wherein the notch facilitates wormhole formation at a corresponding position of the notch arising from dissolution of rock caused by reaction of the rock with the stimulating fluid, wherein
- the downhole tool is operated to create the at least one notch simultaneously with supplying the stimulating fluid to the treatment zone at a pressure less than formation breakdown pressure.
2 more elements
A downhole tool that is deployable in a wellbore that traverses a subterranean rock formation traversed by a wellbore,
- the downhole tool for stimulating recovery of hydrocarbons from the subterranean rock formation,
- the downhole tool configured to create at least one notch in a wellbore surface at a treatment zone simultaneously with supplying a stimulating fluid to the treatment zone at a pressure less than formation breakdown pressure in a single run,
- wherein the notch facilitates wormhole formation at a corresponding position of the notch arising from dissolution of rock caused by reaction of the rock with the stimulating fluid.
Dependencies are inferred from the claim text.