公开(公告)号：EP1706710A1

公开(公告)日：2006-10-04

申请号：EP04800185.3

申请日：2004-11-05

申请人： ABB AS

发明人： BRINGEDAL, Bj rn yvind ,  BIRKEMOE, Egil ,  MORUD, Svein Arne ,  MELB , Hallgeir

IPC分类号： G01F1/86 ,  E21B47/10

CPC分类号： G01F1/36 ,  E21B47/1005 ,  G01F1/68

摘要： The present invention relates to a method for detecting water breakthrough in a well production. According to the invention the model, of which the accuracy is known, will receive three of the four following parameters: inlet pressure, inlet temperature, outlet pressure, outlet temperature. The model comprises a three-phase flash model including heat of evaporation of water and partial pressure of water with or without dissolved components lowering the vapour pressure such as salt and/or alcohol. Based on the said three parameters the model computes the fourth parameter, whereupon the actual fourth parameter is measured and compared to the computed fourth parameter. If the deviation between the measured and the computed parameter is considerably larger than that which can be explained from the level of confidence of the selected model and uncertainty of measurement, it can be concluded that a water breakthrough has actually occurred.