Formation evaluation based on pulse power electrode discharge measurements
AssigneeHalliburton Energy Services, Inc.
InventorsMatthew Eugene Cammack, Boguslaw Wiecek
Life of this patent
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Abstract
A first characteristic of a first discharge of electrodes of a pulse power drilling assembly in a borehole of a subterranean formation is determined. The first characteristic is based on a measurement of the first discharge. A second characteristic of a second discharge of the electrodes is determined. The second discharge occurs after the first discharge, and the second characteristic is based on a measurement of the second discharge. A difference between the first characteristic and the second characteristic is determined. A boundary layer of the subterranean formation is determined based on the difference.
Claims19
A method comprising:
- determining a first characteristic of a first discharge of electrodes of a pulse power drilling assembly in a borehole of a subterranean formation, wherein the first characteristic is based on a measurement of the first discharge;
- determining a second characteristic of a second discharge of the electrodes, wherein the second discharge occurs after the first discharge, and wherein the second characteristic is based on a measurement of the second discharge;
- determining that a difference between the first characteristic and the second characteristic has exceeded a threshold value;
- and
- determining a boundary layer of the subterranean formation based on the difference between the first and second characteristics of the first and second discharges.
A system comprising:
- electrodes of a pulse power drilling assembly in a borehole of a subterranean formation;
- at least one sensor at a face of the electrodes, the at least one sensor to measure at least a first measurement and a second measurement of a parameter of a discharge of the electrodes during pulse power drilling operations;
- and
- a controller to receive one or more signals from the at least one sensor, the signals indicative of the parameter measurements, wherein the controller comprises a processor;
- and
- a machine-readable medium having program code executable by the processor to:
- determine, based on the one or more signals, that a difference between the first measurement and the second measurement has exceeded a threshold value;
- determine a boundary layer of the subterranean formation based on the difference between the first and second measurements of the parameter of the discharge;
- and
- characterize the subterranean formation based, at least in part, on the determined boundary layer and the difference.
One or more non-transitory machine-readable media comprising program code for formation evaluation, the program code to:
- determine a first characteristic of a first discharge of electrodes of a pulse power drilling assembly in a borehole of a subterranean formation, wherein the first characteristic is based on a measurement of the first discharge;
- determine a second characteristic of a second discharge of the electrodes, wherein the second discharge occurs after the first discharge, and wherein the second characteristic is based on a measurement of the second discharge;
- determine that a difference between the first characteristic and the second characteristic has exceeded a threshold value;
- and
- determine a boundary layer of the subterranean formation based on the difference between the first and second characteristics of the first and second discharges.
Dependencies are inferred from the claim text.