| 摘要 |
An electromagnetic probe (1) measures the electromagnetic properties of a subsurface formation (GF) in a limited zone surrounding a well-bore hole (WBH). The well-bore hole is filled with a well-bore fluid (DM).
The probe comprises a pad (2) having a first face defining a first area arranged to be positioned in contact with a well-bore wall (WBW).
The probe (1) further comprises:
- at least two transmitting antennas (4A,4B) defining a central point (CP) between them, each antenna being spaced from a distance d 0 from the central point, and
- at least a first (5A,5B) and a second set (5C,5D) of receiving antennas, each set comprising a first receiving antenna (5A;5C) and a second receiving antenna (5B;5D).
The transmitting (4A,4B) and receiving (5A,5B,5C,5D) antennas are positioned along a line AA' in the first face. |
