E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/06 (2006.01) E21B 49/00 (2006.01) E21B 49/10 (2006.01)
Patent
CA 2242978
A method is disclosed for determining true formation pressure in formations surrounding a fluid-containing borehole having a mudcake on the surface thereof, including the following steps: with the pressure in the borehole at a first measured borehole pressure, measuring, as a first probe pressure, the pressure in the formation adjacent the mudcake; with the pressure in the borehole at a second measured borehole pressure, measuring, as a second probe pressure, the pressure in the formation adjacent the mudcake; and deriving the true formation pressure from the first and second measured borehole pressures and the first and second probe pressures.
Méthode permettant de déterminer la pression de formation réelle dans les formations entourant un puits de forage contenant des fluides et ayant un gâteau de boue à sa surface. La méthode comprend les étapes suivantes : ayant mesuré la pression dans le puits de forage (première pression de puits mesurée), mesurer une première pression de sonde dans la formation adjacente au gâteau de boue; ayant pris une seconde mesure de la pression dans le puits de forage (seconde pression de puits mesurée), mesurer une seconde pression de sonde dans la formation adjacente au gâteau de boue; calculer la pression de formation réelle à partir des première et deuxième pressions de puits ainsi que des première et deuxième pressions de sonde.
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
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