Ultrasonic imaging in wells or tubulars

Details Ultrasonic imaging in wells or tubulars Ultrasonic imaging in wells or tubulars

G - Physics

01

S

G01S 1/72 (2006.01)

Patent

CA 2614706

An ultrasonic imaging method is provided. A wideband acoustic pulse is fired at a wall. A wideband response signal is received. The wideband response signal is processed to select an impedance measurement frequency. A wavelet having a characteristic frequency approximately equal to the impedance measurement frequency is fired. A wavelet response signal is received. A reflection coefficient is determined from the wavelet response signal. An impedance measurement is calculated from the reflection coefficient. Related tools and systems are also disclosed.

L'invention concerne un procédé d'imagerie ultrasonore. Une impulsion acoustique large bande est émise sur une paroi. Un signal de réponse large bande est reçu. Le signal de réponse large bande est traité afin de sélectionner une fréquence de mesure d'impédance. Une ondelette présentant une fréquence caractéristique approximativement égale à la fréquence de mesure d'impédance est émise. Un signal de réponse d'ondelette est reçu. Un coefficient de réflexion est déterminé à partir du signal de réponse d'ondelette. Une mesure d'impédance est calculée à partir du coefficient de réflexion. L'invention concerne également des outils et des systèmes associés.

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