FIELD: electromagnetic logging of boreholes.
SUBSTANCE: antennas used for electromagnetic logging sondes have one or more electrical conductors disposed around core. Conductor or conductors are disposed so that antenna has first and second dipole magnetic moments actually perpendicular to core longitudinal axis and third dipole magnetic moment parallel to core longitudinal axis. In addition, antenna has independent electrical conductor disposed on core for varying first magnetic moment.
EFFECT: enhanced effectiveness of measuring subsurface rock properties.
22 cl, 15 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DEVICE FOR SUPPRESSING INFLUENCES OF WELL, CAUSED BY DIRECTIONAL OR TRANSVERSE MAGNETIC DIPOLE (VARIANTS), DEVICE, MEANT FOR POSITIONING ON A CABLE, AND METHOD FOR CHANGING FLOW OF AXIAL ELECTRIC CURRENT (VARIANTS) | 2001 |
|
RU2305300C2 |
| INDUCTIVE MEASUREMENTS UNDER DECREASED BOREHOLE EFFECT | 2004 |
|
RU2344446C2 |
| METHOD AND DEVICE FOR COMBINED INDUCTION LOGGING AND LOGGING WITH IMAGING | 2007 |
|
RU2447465C2 |
| IMPROVED DETERMINATION OF ORIENTATION OF CONDUCTIVE BED DUE TO ERROR CORRECTION OF PROBE IN WELLBORE | 2011 |
|
RU2560741C2 |
| DEEP ELECTROMAGNETIC MEASUREMENTS USING CROSS MAGNETIC DIPOLES | 2005 |
|
RU2377608C2 |
| ANTI-SYMMETRISED ELECTRO-MAGNETIC MEASUREMENTS | 2006 |
|
RU2431871C2 |
| DETERMINATION OF TOTAL TENSOR OF ELECTROMAGNETIC COUPLING USING SET OF ANTENNAS | 2017 |
|
RU2756409C2 |
| EXTRA COMPENSATING COILS AS ALTERNATIVE MEANS OF BALANCING INDUCTIVE GROUPS | 2006 |
|
RU2365947C2 |
| APPARATUS FOR MEASURING SPECIFIC CONDUCTIVITY AND ELECTRICAL MACROANISOTROPY OF ROCKS | 2013 |
|
RU2528276C1 |
| INDUCTION COIL WITH SELECTION OF LEADS | 2006 |
|
RU2395104C2 |
