G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/30 (2006.01)
Patent
CA 2140857
An electromagnetic wave propagation well logging system (Fig. 3) measuring dielectric constant and/or formation resistivity (conductivity) includes three transmitters (T1) and a pair or receivers (R1 and R2). The receiver pair (R1 and R2) is connected to circuitry that measures the amplitude ratio (60) between the receivers, as well as the phase angle difference (62) between the receivers. Signal representative of the detected amplitude ratio and of the detected phase angle difference are combined (84) in such a manner as to make the depth of investigation controllable. Methods are also disclosed for maintaining a common depth of investigation as the well logging instrument traverses the earth borehole.
Cette invention concerne un système de diagraphie par propagation d'ondes électromagnétiques (fig. 3) servant à mesurer la constante diélectrique et/ou la résistivité (conductivité) d'une formation et qui comprend trois émetteurs (T1) et une paire de récepteurs (R1 et R2). Les récepteurs (R1 et R2) sont connectés à un circuit servant à déterminer le rapport d'amplitude (60) entre les deux ainsi que l'angle de déphasage (62) qui les caractérise. Les signaux représentant ces deux valeurs sont combinés (84) de manière à permettre de varier la profondeur de sondage. Cette invention concerne également des méthodes permettant de maintenir constante la profondeur de sondage à mesure que l'instrument de diagraphie traverse une formation.
Bittar Michael S.
Rodney Paul F.
Baroid Technology Inc.
Kirby Eades Gale Baker
LandOfFree
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