Abstract: A method for detecting water breakthrough in a well production. A 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 includes a three-phase flash model including heat of evaporation of water and partial pressure of water with or without dissolved components lowering the vapor pressure such as salt and/or alcohol. Based on the 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.

Abstract: A method and a system to provide allocation of mixed flow to individual sources in oil and gas production systems by measuring mixed flow; analyzing the composition; accessing the data for the mixed flows; and calculating the flow from each source with an allocation algorithm using the mixed flow, the analyzed composition and the composition of at least one source.