Modeling and Simulation of Flow Leakage in Petroleum Pipelines in an Unsteady Condition

Abstract

Leakage in fluid pipelines that is often observed in oil industry could be simulated easily in a steady condition by applying some assumptions. At steady condition, any sort of pressure drops in pipelines could be a reason for leakage presence. Since operations in pipelines is usually happens in an unsteady condition, In the present research, the flow in pipelines has been assumed as unsteady, for which the steady flow will be considered as its special case. In order to solve the adapted equations by methods of specifications, at first two algorithms called tile and time-machine will be investigated. And because of reinforcing noises and error establishment in leakage detection, in tile algorithm, a method similar to time-machine algorithm will be used. Then an algorithm specified for PLD model will be presented to determine an unsteady flow simulation, leakage detection, leakage physical situation, and eventually the calculation of the extent of the loss. The obtained results of this model will be compared with the practical ones.

 
 

[1].Wylie,E.B., and Streeter V.L. ”Fluid Transients in Systems”, Prentice Hall, Inc., Englewood, NJ.,1993.
 [2].Evanglisti, G.”Waterhammer Analysis by the Method of Characteristics.” L,Energ. Elec. Vol xv 
      nos, 10,11,12,Milan,1969.
[3].Gray, C.A.M.”The Analysis of the Dissipation of Energy in Water hammer,”Proc.Ascg,Vol.119, Paper
     1176-1194.1953.
[4].Halliwell, A.R.”Velocity of Water hammer Wave in an Elastic Pipe. ”J.Hyd-Div, ASCE.VOL
     89,NO.hy4, pp.1- 21 July 1963.
[5].Mears M.N.,”Real word Application of Pipeline Leak Detection” Proceedings of International Conference on
     Pipeline in Frastructure. II, American Society of Civil Engineers, San Antonio,TX, PP,189-209 1993.
 [6].Streeter, V.L., and E.B, ”Wylie: Hydraulic Transients”,M C Graw-ltill Bok co., New York 1967.
 [7].J.C.P.Liou, J.Tian.”Leak Detection-Transient Flow Simulation Approaches”, J. of energy Resources
      Technology,vo.117, sept1995.
 [8].Jim C.P.Liou: ”Leak Detection by Mass Balance Effective for Norman Wells line”,Oil & Gas Journal
     ,Apr.22, 1996.
]10[ غلامرضا پوریایی، مدلسازی نشتی در خطوط لوله در حالت ناپایدار، پایان نامه کارشناسی ارشد مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه تربیت مدرس 1379
[10].Dupont, T.Rachford, H.H., et al “A Transient Remote integrity Monitor for pipelines Using Standard
      SCADA Measurements”, INTERPIPE Conference, Houston, TX, 1980.
 [11].“Evaluation Methodology for Software Baker Leak Detection Systems”, API PUBL,1155 , 95 December
      7,1994.