Abb As

Abb Research Ltd.

Svein Arne Morud

Bjørn Øyvind Bringedal

Hallgeir Melbø

Robert Anton Bernard Van Der Geest

John Allen

Bjorn Oyvind Bringedal

Egil Birkemoe

Bjoern Oeyvind Bringedal

Hallgeir Melboe

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.

Detection of water breakthrough

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.

On-line compositional allocation

Sensor failure in an oil and gas production system is monitored and detected by checking the consistency of the measurements of the sensor in question using a computer-based process model with the measurements of the other sensors in the system. The present invention also generates a back-up value for a failing sensor with the process model by identifying the value that is most consistent with the measurements of the other sensors in the system.

Method for detecting and correcting sensor failure in oil and gas production system

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Bekkestua, Norway

Svein Arne Morud