G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 1/28 (2006.01) G01V 1/50 (2006.01)
Patent
CA 2529169
A method and apparatus for imaging subsurface fractures 104 using an ST plane for quick looks and quality checks at the wellsite. Incident angles of impinging acoustic waves 116 with respect to receivers Rn are estimated from actual and apparent slowness, and the position of the fracture 104 is estimated from the travel time and incident angle .alpha.. The fracture 104 can be imaged by plotting values from the ST plane onto the position of the fracture.
La présente invention concerne un procédé et un appareil pour imager des fractures souterraines (104) au moyen d'un plan lenteur/temps (ST) permettant des examens et des contrôles qualité rapides à l'emplacement du puits. Les angles d'incidence (.alpha.) des ondes acoustiques incidentes (116) par rapport aux récepteurs (Rn) sont estimés à partir de la lenteur réelle et apparente, et la position de la fracture (104) est estimée à partir du temps de propagation et de l'angle d'incidence (.alpha.). Pour imager la fracture (104), il suffit de reporter sur la position de la fracture les valeurs provenant du plan (ST).
Basaki Satoshi
Fujii Kasumi
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
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