Method to assess risk of fluid flow and associated long term damage of annular cement
AssigneeHalliburton Energy Services, Inc.
InventorsSiva Rama Krishna Jandhyala, Walmy Cuello Jimenez
Life of this patent
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Abstract
Methods of the present disclosure relate to assessing and mitigating the risk of pore pressure buildup as part of designing a cement formulation. A method comprises: performing wellbore integrity analysis to provide a stress state of a cement sheath, wherein the cement sheath is a model; modifying the stress state of the cement sheath due to fluid influx through the cement sheath; comparing the modified stress state to failure properties for the cement sheath; and formulating a cement composition based on at least the modified stress state.
Claims20
A method comprising:
- performing wellbore integrity analysis to provide a stress state of a cement sheath, wherein the cement sheath is a model;
- modifying the stress state of the cement sheath due to a fluid influx through the cement sheath;
- comparing the modified stress state to failure properties for the cement sheath;
- and
- formulating a cement composition based on at least the modified stress state such that the cement composition has a shear strength greater than the modified stress state;
- preparing the cement composition;
- pumping the cement composition into a wellbore;
- and
- setting the cement composition in the wellbore to form a set cement composition, wherein the set cement composition has the property of having shear strength greater than the modified stress state.
A method comprising:
- performing wellbore integrity analysis to provide a stress state of a cement sheath, wherein the cement sheath is a model;
- modifying the stress state of the cement sheath due to a fluid influx through the cement sheath;
- comparing the modified stress state to failure properties for the cement sheath;
- and
- formulating a cement composition such that the fluid influx into a set cement composition formed from the cement composition is less than a setpoint fluid influx;
- preparing the cement composition;
- pumping the cement composition into a wellbore;
- and
- setting the cement composition in the wellbore to form the set cement composition, wherein the set cement composition has the property of having fluid influx into the set cement composition of less than the setpoint fluid influx.
Dependencies are inferred from the claim text.