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US 2015/0176387 A1Published application
Perforation strategy
AssigneeSchlumberger Technology Corporation
InventorKevin David Wutherich
Life of this patent
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Abstract
A method includes determining a stress variation of a geological formation disposed on a wellbore; determining a breakdown pressure of each perforation of a plurality of perforations along a length of the wellbore based on the stress variation; calculating a flow rate of a pumping operation of a hydraulic fracturing process based on the breakdown pressure of each perforation of the plurality of perforations; and hydraulically fracturing a geological formation disposed on the wellbore based on the flow rate.
Claims20
A method, comprising:
- determining a stress variation of a geological formation disposed on a wellbore;
- determining a breakdown pressure of each perforation of a plurality of perforations along a length of the wellbore based on the stress variation;
- calculating a flow rate of a pumping operation of a hydraulic fracturing process based on the breakdown pressure of each perforation of the plurality of perforations;
- hydraulically fracturing a geological formation disposed on the wellbore based on the flow rate.
1 more element
A method, comprising:
- determining a stress variation of a geological formation disposed on a wellbore;
- generating a first plurality of perforations having a having a first breakdown pressure and a second plurality of perforations having a second breakdown pressure greater than the first breakdown pressure based on the stress variation;
- hydraulically fracturing a first portion of the geological formation corresponding to the first plurality of perforations;
- isolating the first plurality of perforations;
- hydraulically fracturing a second portion of the geological formation corresponding to the second plurality of perforations.
2 more elements
A method, comprising:
- determining a stress variation of a geological formation disposed on a wellbore;
- generating a first plurality of perforation groups having a first breakdown pressure based on the stress variation;
- generating a second plurality of perforation groups having a second breakdown pressure based on the stress variation;
- hydraulically fracturing a first portion of the geological formation corresponding to the first plurality of perforation groups;
- isolating the first plurality of perforation groups;
- hydraulically fracturing a second portion of the geological formation corresponding to the second plurality of perforation groups.
3 more elements
A method, comprising:
- pumping a fluid into a wellbore at a first rate for a first period of time and determining a first bottom hole pressure;
- determining a rate of change of the first bottom hole pressure during the first time period;
- normalizing the determined rate of change of the bottom hole pressure to a volume of the fluid pumped during the first time period.
Dependencies are inferred from the claim text.