Method and apparatus for real time enhancing of the operation of a fluid transport pipeline

• US 8,766,806 B2
• Filed: 06/26/2009
• Issued: 07/01/2014
• Est. Priority Date: 06/27/2008
• Status: Active Grant

• Current Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Original Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Inventors: McDowell, Keith C
• Primary Examiner(s): Lim, Steven
• Assistant Examiner(s): Fan, Hongmin
• Application Number:
  US12/492,564
• Publication Number:
  US 20090322544A1
• Time in Patent Office: 1,831 Days
• Field of Search: 340/605, 340/611, 73/405.R, 73/405.A, 735/70, 735/92, 703/50, 703/51
• US Class Current: 340/605
• CPC Class Codes: F17D 5/06 using electric or acoustic means
• CPC Class Codes: G01M 3/04 by detecting the presence of fluid at the leakage point
• CPC Class Codes: G01M 3/2815 using pressure measurements
• CPC Class Codes: G08B 21/18 Status alarms G08B21/02 takes precedence
• CPC Class Codes: Y10T 137/0318 Processes
• CPC Class Codes: Y10T 137/0452 Detecting or repairing leak

Abstract

A real time method and dynamic logic-based system for enhancing the operation of a pipeline network is disclosed. The system and method perform monitoring of the operation of a pipeline network, generate alarms in response to differing levels of destabilized pipeline operations, manage the generation of alarms based upon known operating events and operating conditions, diagnose potential source of the detected destabilized events and manage the operation of the pipeline.

Claims

1. A method of real time monitoring a pipeline network to identify possible destabilizing events in the pipeline network, comprising:

sensing one or more pressure waves within the pipeline network at predetermined locations within the pipeline network;

determining the presence of a possible destabilizing event in the pipeline network in response to the sensed pressure waves by detecting variations in the sensed pressure waves, and determining whether or not the detected variation exceeds an accepted standard deviation, wherein the accepted standard deviation is calculated on a rolling basis,

wherein determining the presence of a possible destabilizing event in the pipeline network in response to the sensed pressure waves further includes determining whether or not the sensed pressure waves exceed a predetermined stable operating threshold, wherein the predetermined stable operating threshold is automatically adjusted based upon at least one of the current operating mode, current operating conditions and current operating events,

wherein determining the presence of a possible destabilizing event in the pipeline network in response to the sensed pressure waves further includes determining whether or not a subsequential decompression characteristic is present following the detection of the variation in sensed pressure waves;

corroborating the presence of the destabilizing event based upon at least one of (i) one or more sensed pipeline network operating conditions and (ii) at least one independent process variable, wherein corroborating the presence of the destabilizing event includes determining the certainty of the possible destabilizing event, wherein determining the certainty of the possible destabilizing event includes comparing the determination of a possible destabilizing event based upon sensed pressure waves with one or more sensed pipeline network operating conditions and further corroborating the determination of a possible destabilizing event based upon sensed pressure waves with at least one additional independent process variable; and

identifying a potential cause of the sensed destabilizing event by comparing the character of the current destabilizing events using an expert based diagnostic subroutine with prior destabilizing events, the current operating mode of the pipeline network, the current operating conditions in the pipeline network and the current operating events in the pipeline network.

2. The method according to claim 1, wherein the accepted standard deviation is an empirically determined standard deviation.

3. The method according to claim 1, further comprising:

issuing an alarm indicating the presence of a leak when it is determined that the subsequential decompression characteristic is present.

4. The method of monitoring a pipeline network according to claim 1, further comprising:

generating an alarm reporting the presence and certainty of the possible destabilizing event.

5. The method according to claim 4, further comprising:

managing the generation of alarms.

6. The method of monitoring a pipeline network according to claim 1, further comprising:

determining the location of the possible destabilizing event in the pipeline network in response to the sensed pressure waves.

7. The method of monitoring a pipeline network according to claim 6, further comprising:

generating an alarm reporting at least one of the presence and location of the possible destabilizing event.

8. The method of monitoring a pipeline network according to claim 6, wherein the sensing of pressure waves within the pipeline network occurs at periodic intervals, and

wherein determining the location of the possible destabilizing event in the pipeline network in response to the sensed pressure waves comprising:

identifying which predetermined locations a sensed pressure wave is sensed at a first sensing time;

identifying which predetermined locations the sensed pressure wave is sensed at a second sensing time; and

determining the location of a possible destabilizing event based upon the location of the sensed pressure wave at the first sensing time and the second sensing time.

9. The method according to claim 1, further comprising:

reporting the potential cause of the sensed destabilizing event.

10. The method according to claim 9, further comprising:

determining at least one corrective measure in response to the sensed destabilizing event; and

performing at least one of reporting the at least one corrective measure to an operator of the pipeline network and automatically executing the at least one corrective measure.

11. The method according to claim 1, wherein the at least one additional independent process variable comprising pressure decay, line flow divergence, and line balance.

12. The method according to claim 4, wherein the alarm has more than one alarm level, wherein the alarm level generated is based upon the determined certainty of the possible destabilizing event.

13. The method according to claim 7, wherein the alarm has more than one alarm level, wherein the alarm level generated is based upon the determined certainty of the possible destabilizing event.

14. A method of real time monitoring a pipeline network to identify possible destabilizing events in the pipeline network, comprising:

sensing one or more pressure waves within the pipeline network at predetermined locations within the pipeline network;

determining the presence of a possible destabilizing event in the pipeline network in response to the sensed pressure waves by determining whether or not the sensed pressure waves exceed a predetermined stable operating threshold, wherein the predetermined stable operating threshold is automatically adjusted based upon at least one of the current operating mode, current operating conditions and current operating events, wherein determining the presence of a possible destabilizing event in the pipeline network in response to the sensed pressure waves further includes detecting variations in the sensed pressure waves, and determining whether or not the detected variation exceeds an accepted standard deviation, wherein the accepted standard deviation is calculated on a rolling basis, wherein the determining the presence of a possible destabilizing event in the pipeline network includes determining whether or not the sensed pressure waves exceed the adjusted predetermined stable operating threshold, wherein determining the presence of a possible destabilizing event in the pipeline network in response to the sensed pressure waves further includes determining whether or not a subsequential decompression characteristic is present following the detection of the variation in sensed pressure waves;

determining the certainty of the possible destabilizing event;

corroborating the presence of the destabilizing event based upon at least one of (i) one or more sensed pipeline network operating conditions and (ii) at least one independent process variable,

wherein corroborating the presence of the destabilizing event includes determining the certainty of the possible destabilizing event, wherein determining the certainty of the possible destabilizing event includes comparing the determination of a possible destabilizing event based upon sensed pressure waves with one or more sensed pipeline network operating conditions and further corroborating the determination of a possible destabilizing event based upon sensed pressure waves with least one additional independent process variable; and

identifying a potential cause of the sensed destabilizing event by comparing the character of the current destabilized events using an expert based diagnostic subroutine with at least one of the prior destabilizing events, the current operating mode of the pipeline network, the current operating conditions in the pipeline network and the current operating events in the pipeline network.

15. The method according to claim 14, further comprising:

generating an alarm reporting the presence and certainty of the possible destabilizing event.

16. The method according to claim 15, further comprising:

managing the generation of alarms.

17. The method according to claim 15, wherein the alarm has more than one alarm level, wherein the alarm level generated is based upon the determined certainty of the possible destabilizing event.

18. The method according to claim 14, further comprising:

determining the location of the possible destabilizing event in the pipeline network in response to the sensed pressure waves.

19. The method according to claim 18, further comprising:

generating an alarm reporting the presence and location of the possible destabilizing event.

20. The method according to claim 18, wherein the sensing of pressure waves within the pipeline network occurs at periodic intervals, and

wherein determining the location of the possible destabilizing event in the pipeline network in response to the sensed pressure waves comprising:

identifying which predetermined locations a sensed pressure wave is sensed at a first sensing time;

identifying which predetermined locations the sensed pressure wave is sensed at a second sensing time; and

determining the location of a possible destabilizing event based upon the location of the sensed pressure wave at the first sensing time and the second sensing time.

21. The method according to claim 19, wherein the alarm has more than one alarm level, wherein the alarm level generated is based upon the determined certainty of the possible destabilizing event.

22. The method according to claim 14, further comprising:

reporting the potential cause of the sensed destabilizing event.

23. The method according to claim 22, further comprising:

determining at least one corrective measure in response to the sensed destabilizing event; and

one of reporting the at least one corrective measure to an operator of the pipeline network and automatically executing the at least one corrective measure.

24. The method according to claim 14, further comprising:

generating an alarm indicating the possible presence of a destabilizing event when the sensed pressure waves exceed the adjusted predetermined stable operating threshold, wherein the alarm has more than one alarm level, wherein the alarm level generated is based upon the determined certainty of the possible destabilizing event.

25. The method according to claim 24, wherein the accepted standard deviation is an empirically determined standard deviation.

26. The method according to claim 24, wherein generating an alarm indicating the possible presence of a destabilizing event further comprising generating an alarm indicating the possible presence of a destabilizing event when the sensed pressure waves exceed the adjusted predetermined stable operating threshold and the detected variation exceeds the accepted standard deviation.

27. The method according to claim 24, wherein generating an alarm indicating the possible presence of a destabilizing event includes generating an alarm indicating the presence of a leak when it is determined that the subsequential decompression characteristic is present.

28. A system for monitoring a pipeline network, wherein the pipeline network having a first facility, a second facility, at least one pipeline segment connecting the first facility and the second facility such that the fluid can flow between the first facility and the second facility, and at least one pumping station connected to the at least one pipeline segment, whereby fluid flowing through the at least one pipeline segment flows through the at least one pumping station, the system comprising:

a plurality of pressure sensing devices for sensing the presence of one or more pressure waves within the pipeline network;

a plurality of remote monitoring devices operatively connected to the first facility, the second facility and the at least one pumping station, wherein the remote monitoring devices monitor the operation of the pipeline network and collect operating data of the pipeline network; and

a control unit operatively connected to the plurality of pressure sensing devices and the plurality of remote monitoring devices for monitoring the operation of the pipeline network based upon signals received from the plurality of remote monitoring devices, wherein the control unit detects the presence of possible destabilizing events in the pipeline network by determining whether or not variations in the sensed pressure waves are present and whether or not the variation exceeds an accepted standard deviation, wherein the accepted standard deviation is calculated on a rolling basis, wherein the control unit further determines the presence of a possible destabilizing event by determining whether or not the sensed pressure waves exceed a predetermined stable operating threshold, wherein the control unit adjusts the predetermined stable operating threshold in response to at least one of the operating mode, current operating conditions and current operating events,

wherein the control unit corroborates the presence of the destabilizing event based upon at least one of (i) one or more sensed pipeline network operating conditions and (ii) at least one independent process variable, wherein the control unit determines the certainty of the possible destabilized event by comparing the determination of a possible destabilized event based upon sensed pressure waves with one or more sensed pipeline network operating conditions sensed by the plurality of remote monitoring devices,

wherein the control unit further diagnoses a potential cause of the sensed destabilizing event by comparing the character of the sensed destabilizing event using an expert based diagnostic subroutine with at least one of prior destabilizing events, the current operating mode of the pipeline network, the current operating conditions in the pipeline network and the current operating events in the pipeline network.

29. The system according to claim 28, wherein the control unit empirically determines the accepted standard deviation.

30. The system according to claim 28, wherein each of the at least one pumping station includes a pump, wherein the plurality of pressure sensing devices comprising:

a pair of pressure sensing devices for each pumping station,

wherein a first sensing device of the pair of pressure sensing devices is located on one side of the pump in the at least one pipeline segment and a second sensing device of the pair of pressure sensing devices is located on an opposite of the pump in the at least one pipeline segment, and

wherein each pressure sensing device being capable of sensing one or more pressure waves within the pipeline network.

31. The system according to claim 28, wherein each of the at least one pumping station includes a pump, wherein the plurality of pressure sensing devices comprising:

a pair of pressure sensing devices for each pumping station,

wherein a first sensing device of the pair of pressure sensing devices is located on one side of the pump in the at least one pipeline segment and a second sensing device of the pair of pressure sensing devices is located on an opposite of the pump in the at least one pipeline segment,

wherein each pressure sensing device being capable of sensing one or more pressure waves within the pipeline network,

wherein the control unit determines the location of the destabilizing in the pipeline network based upon the location of the pressure sensing devices that sensed a pressure wave.

32. The system for monitoring a pipeline network according to claim 31, wherein the control unit identifies remedial measures to isolate or correct the possible destabilizing event in response to the determination that a possible destabilizing event exists.

33. The system according to claim 32, wherein the control unit performs at least one of reporting the remedial measures to an operator of the pipeline network and automatically executing the remedial measures.

34. The system for monitoring a pipeline network according to claim 28, wherein the control unit identifies remedial measures to isolate or correct the possible destabilizing event in response to the determination that a possible destabilizing event exists.

35. The system according to claim 34, wherein the control unit performs at least one of reporting the remedial measures to an operator of the pipeline network and automatically executing the remedial measures.

36. The system according to claim 28, wherein the at least one additional independent process variable comprising pressure decay, line flow divergence, and line balance.

37. The system according to claim 28, wherein the control unit comprising:

a plurality of remote control units, wherein each of the plurality of remote control units being operatively connected to one of the plurality of remote monitoring devices, wherein each remote control unit detects the presence of possible destabilizing events sensed by the corresponding remote monitoring devices by determining whether or not variations in the sensed pressure waves are present and whether or not the variation exceeds an accepted standard deviation, wherein the remote control unit corroborates the presence of the destabilizing event based upon at least one of (i) one or more sensed pipeline network operating conditions and (ii) at least one independent process variable.

38. The system according to claim 37, wherein the control unit further comprising:

a master control unit operatively connected to each of the plurality of remote control units, wherein the master control unit further corroborates the presence of the destabilizing event from each of the remote control units based upon at least one of (i) one or more sensed pipeline network operating conditions and (ii) at least one independent process variable.

39. A pipeline network for transporting fluids, comprising:

a first facility;

a second facility;

at least one pipeline segment connecting the first facility and the second facility such that the fluid can flow between the first facility and the second facility;

at least one pumping station connected to the at least one pipeline segment, whereby fluid flowing through the at least one pipeline segment flows through the at least one pumping station; and

a monitoring system for monitoring the operation of the pipeline network, wherein the monitoring system comprising;

a plurality of pressure sensing devices for sensing the presence of one or more pressure waves within the pipeline network;

a plurality of remote monitoring devices operatively connected to the first facility, the second facility and the at least one pumping station, wherein the remote monitoring devices monitor the operation of the pipeline network and collect operating data of the pipeline network; and

a control unit operatively connected to the plurality of pressure sensing devices and the plurality of remote monitoring devices for controlling the operation of the pipeline network based upon signals received from the plurality of remote monitoring devices, wherein the control unit determines (i) whether or not variations in the sensed pressure waves are present, and (ii) whether or not the variation exceeds an accepted standard deviation, wherein the accepted standard deviation is calculated on a rolling basis, wherein the control unit detects the presence of possible destabilizing events in the pipeline network in response to the sensed pressure waves based upon determining whether or not detected variations in the sensed pressure waves exceeds an accepted standard deviation, wherein control unit further determines whether or not a subsequential decompression characteristic is present following the detection of the variation in sensed pressure waves wherein the control unit further corroborates the presence of the destabilizing event based upon at least one of (i) one or more sensed pipeline network operating conditions and (ii) at least one independent process variable, wherein the control unit further diagnoses a potential cause of the sensed destabilizing event by comparing the character of the sensed destabilizing event using an expert based diagnostic subroutine with at least one of prior destabilizing events, the current operating mode of the pipeline network, the current operating conditions in the pipeline network and the current operating events in the pipeline network, wherein the control unit determines the certainty of the possible destabilizing event.

40. The pipeline network according to claim 39, wherein the control unit empirically determines the accepted standard deviation.

41. The pipeline network according to claim 39, wherein each of the at least one pumping station includes a pump, wherein the plurality of pressure sensing devices comprising:

a pair of pressure sensing devices for each pumping station,

wherein a first sensing device of the pair of pressure sensing devices is located on one side of the pump in the at least one pipeline segment and a second sensing device of the pair of pressure sensing devices is located on an opposite of the pump in the at least one pipeline segment, and

wherein each pressure sensing device being capable of sensing one or more pressure waves within the pipeline network.

42. The pipeline network according to claim 39, further comprising:

at least one display operatively connected to the control unit, wherein the presence of a destabilizing is displayed on the at least one display.

43. The pipeline network according to claim 39, wherein each of the at least one pumping station includes a pump, wherein the plurality of pressure sensing devices comprising:

a pair of pressure sensing devices for each pumping station, wherein a first sensing device of the pair of pressure sensing devices is located on one side of the pump in the at least one pipeline segment and a second sensing device of the pair of pressure sensing devices is located on an opposite of the pump in the at least one pipeline segment,

wherein each pressure sensing device being capable of sensing one or more pressure waves within the pipeline network,

wherein the control unit determines the location of a destabilizing event in the pipeline network based upon the location of the pressure sensing devices that sensed a pressure wave.

44. The pipeline network according to claim 43, wherein the control unit identifies remedial measures to isolate or correct the possible destabilizing event in response to the determination that a possible destabilizing event exists.

45. The system according to claim 44, wherein the control unit performs at least one of reporting the remedial measures to an operator of the pipeline network and automatically executing the remedial measures.

46. The pipeline network according to claim 39, wherein the control unit identifies remedial measures to isolate the possible destabilizing event in response to the determination that a possible destabilizing event exists.

47. The system according to claim 46, wherein the control unit performs at least one of reporting the remedial measures to an operator of the pipeline network and automatically executing the remedial measures.

48. The pipeline network according to claim 39, wherein the control unit comprising:

a plurality of remote control units, wherein each of the plurality of remote control units being operatively connected to one of the plurality of remote monitoring devices, wherein each remote control unit detects the presence of possible destabilizing events sensed by the corresponding remote monitoring devices by determining whether or not variations in the sensed pressure waves are present and whether or not the variation exceeds an accepted standard deviation, wherein the remote control unit corroborates the presence of the destabilizing event based upon at least one of (i) one or more sensed pipeline network operating conditions and (ii) at least one independent process variable.

49. The pipeline network according to claim 48, wherein the control unit further comprising:

a master control unit operatively connected to each of the plurality of remote control units, wherein the master control unit further corroborates the presence of the destabilizing event from each of the remote control units based upon at least one of (i) one or more sensed pipeline network operating conditions and (ii) at least one independent process variable.