| 摘要 |
FIELD: geophysics.SUBSTANCE: invention relates to geophysics and can be used for detection of geological formations. System (10) for detecting geological formations includes electromagnetic transmitter (11) located on surface of geological formation (12) near first well (13), having vertical direction of drilling. Said first well is enveloped with metal casing (14). System also includes electromagnetic receiver (14) located at depth inside said first well (13). Electromagnetic receiver (14) includes means (30) of detecting electromagnetic field. System is characterised by that said electromagnetic transmitter (11) includes means (20) to generate electromagnetic field to form a primary electromagnetic field, focused in direction of said metal casing (18), said metal casing (18) emits secondary electromagnetic field in geological formation (12).EFFECT: technical result is improved accuracy and reliability of obtained data.8 cl, 3 dwg |
