System and method for a pressure test
AssigneeInnovative Pressure Testing, LLC
InventorsCharles M. Franklin, Richard A. Cully
Life of this patent
Estimating the term…
Abstract
A method for determining integrity of a wellbore. The method includes underbalancing a volume of fluid in the wellbore, receiving pressure data of the wellbore after shut-in of the wellbore, determining a pressure curvature based on the pressure data, and generating a failing indication as a result of the pressure curvature indicating that the slope is constant or increasing in absolute value. The failing indication indicates fluid communication across a wellbore boundary.
Claims20
A method for determining integrity of a wellbore, the method comprising:
- underbalancing a volume of fluid in the wellbore;
- receiving, by a processor, pressure data of the wellbore after shut-in of the wellbore;
- determining, by the processor, a pressure curvature based on the pressure data;
- and generating a failing indication as a result of the pressure curvature indicating that an absolute value of a slope of the pressure data is constant or increasing;
- wherein the failing indication indicates fluid communication across a wellbore boundary.
A system for determining integrity of a wellbore, the system comprising:
- at least one pressure sensor coupled to a volume of fluid in the wellbore;
- and
- a processor coupled to the pressure sensor, the processor configured to:
- receive pressure data of the wellbore from the at least one pressure sensor after shut-in of the wellbore in an underbalanced condition;
- determine a pressure curvature based on the pressure data;
- and
- generate a failing indication as a result of the pressure curvature indicating that an absolute value of a slope of the pressure data is constant or increasing;
- wherein the failing indication indicates fluid communication across a wellbore boundary.
A non-transitory computer-readable medium containing instructions that, when executed by a processor, cause the processor to:
- receive pressure data of a wellbore from a pressure sensor coupled to a volume of fluid in the wellbore after shut-in of the wellbore, caused by a valve, in an underbalanced condition caused by a pump circulating a lighter-weight fluid into the well bore to create the underbalanced condition;
- determine a pressure curvature based on the pressure data;
- and
- generate a failing indication as a result of the pressure curvature indicating that an absolute value of a slope of the pressure data is constant or increasing;
- wherein the failing indication indicates fluid communication across a wellbore boundary.
The non-transitory computer-readable medium 13 wherein the instructions, when executed, further cause the processor to generate the failing indication as a result of the pressure slope having a value falling outside a predetermined range.
Dependencies are inferred from the claim text.