Improved method and apparatus for predicting the fluid...

G - Physics – 01 – V

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Details

G01V 9/00 (2006.01) E21B 49/08 (2006.01) G01N 7/00 (2006.01) G01N 33/28 (2006.01) E21B 47/10 (2006.01)

Patent

CA 2392618

An improved apparatus and improved method for determining the characteristics of a multi-phase fluid along a well (10) and drilled pipe (26) having a predefined geometric profile are presented. Various state properties of the fluid, including the temperature, pressure, flow rate and specific gravity are taken at the wellhead (20) or separator (22) and used as starting values for calculating estimated state properties at various segments along the well hole. Once the state properties are calculated, an estimated mass flow and velocity rate for the fluid and its constituents can be calculated at specific points along the well hole by implementing computer-based programs and algorithms to extrapolate and/or iterate the known parameters and measurements in a progressively incremented manner from the locations of such given starting points at an initial segment up to other further points corresponding to a set of further sequential segments used in the geometric profile mathematical model. Image

Cette invention concerne un dispositif amélioré et un procédé amélioré permettant de déterminer les caractéristiques d'un fluide multi-phase le long d'un puits (10) et d'un tube perforé (26) au profil géométrique prédéfini. Diverses variables d'état du fluide telles que température, pression, débit et poids spécifique sont mesurées au niveau de la tête de puits (20) du séparateur (22) et utilisées comme valeurs de départ pour le calcul de propriétés estimées dans divers segments du trou de puits. Une fois ces variables d'état calculées, il est possible de déterminer un débit massique et une vitesse pour le fluide et ses éléments constitutifs en des points précis le long du trou de puits. A cette fin, on utilise des programmes informatiques et des algorithmes pour soumettre à extrapolation et/ou itération les paramètres et les relevés connus par incréments progressifs à partir des emplacement des points de départ donnés au niveau d'un segment initial jusqu'à d'autres points correspondant à un ensemble d'autres segments séquentiels utilisés dans le modèle mathématique à profil géométrique.

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