Automatic shift detection for oil and gas production system
A computer-implemented method and apparatus for monitoring an electric submersible pump and detecting a shift are disclosed. A leading and a lagging average over a predetermined period of time may be determined for a data stream obtained from an oil and gas production system, and a difference between the leading average and the lagging average may be used to detect a shift.
1. A computer-implemented method for monitoring an electric submersible pump and detecting a shift, the method comprising:
obtaining, from an oil and gas production system, a data stream;
determining, by a processor, a leading and a lagging average over a predetermined period of time for the data stream;
determining, by the processor, a difference between the leading average and the lagging average;
determining, by the processor, an offset based on the difference between the leading average and the lagging average;
detecting, by the processor, a shift where the difference between the leading average and the lagging average is greater than a predetermined threshold;
sending, by the processor, a signal to the production system regarding the shift; and applying, by the processor, the offset to the data obtained from the pump.
2. The computer-implemented method of claim 1 further comprises validating, by the processor, the detection of the shift.
3. The computer-implemented method of claim 2 , wherein the shift is validated where the difference between the leading average and the lagging average of at least one of a tubing head pressure, a drive frequency, or a volts/hertz is greater than the predetermined threshold at any point between a first state and a second state.
4. The computer-implemented method of claim 2 , wherein the shift is indicative of a pump off and is validated by movement from a stable state to an out of shift state.
5. The computer-implemented method of claim 1 further comprises reporting, by the processor, the detected shift to a user.
6. The computer-implemented method of claim 1 , wherein the data stream is at least one of: differential tubing pressure, drive frequency, tubing head pressure, or a volts to hertz ratio.
7. An apparatus, comprising:
at least one processing unit; and
program code configured upon execution by the at least one processing unit to monitor an electric submersible pump and detect a shift by:
obtaining, from an oil and gas production system, a data stream;
determining a leading and a lagging average over a predetermined period of time for the data stream;
determining a difference between the leading average and the lagging average;
determining an offset based on the difference between the leading average and the lagging average;
detecting a shift where the difference between the leading average and the lagging average is greater than a predetermined threshold;
sending a signal to the production system regarding the shift;
applying the offset to the data obtained from the pump; and
validating the detection of the shift.
8. The apparatus of claim 7 , wherein the shift is validated where the difference between the leading average and the lagging average of at least one of a tubing head pressure, a drive frequency, or a volts/hertz is greater than the predetermined threshold at any point between a first state and a second state.
9. The apparatus of claim 7 , wherein the shift is indicative of a pump off and is validated by movement from a stable state to an out of shift state.
10. The apparatus of claim 7 , wherein the program code is further configured to report the detected shift to a user.
11. The apparatus of claim 7 , wherein the data stream is at least one of: differential tubing pressure, drive frequency, tubing head pressure, or a volts to hertz ratio.
12. A program product, comprising:
a computer readable medium; and
program code stored on the computer readable medium and configured upon execution by at least one processing unit to perform electric submersible pump monitoring and shift detection by:
obtaining, from an oil and gas production system, a data stream;
determining a leading and a lagging average over a predetermined period of time for the data stream;
determining a difference between the leading average and the lagging average;
determining an offset based on the difference between the leading average and the lagging average;
detecting a shift where the difference between the leading average and the lagging average is greater than a predetermined threshold;
sending a signal to the production system regarding the shift;
applying the offset to the data obtained from the pump; and
validating the detection of the shift.
13. The program product of claim 12 , wherein the shift is validated where the difference between the leading average and the lagging average of at least one of a tubing head pressure, a drive frequency, or a volts/hertz is greater than the predetermined threshold at any point between a first state and a second state.
14. The program product of claim 13 , wherein the shift is indicative of a pump off and is validated by movement from a stable state to an out of shift state.
15. The program product of claim 12 , wherein the program code is further configured to report the detected shift to a user.