| 摘要 |
<p>The invention is a method for radar detection in a well (1) in a geological formation (9), comprising the following steps: i) emplacement of at least one transmitter antenna (2) in a fixed position and orientation in the well (1); ii) generation of a first series of electrical signals (25) to a transmitter antenna (2) and emission of a first series of electromagnetic waves (261) from the transmitter antenna (2) at a time (t1); iii) reception of a first series of reflected electromagnetic waves (851, 852, ..., 85n), by at least one, preferably more receiver antennas (81, 82, ..., 8n), optionally signal amplification and transformation of the reflected electromagnetic waves to registrations (S1); iv) generation of a second series of electrical signals (25) to the transmitter antenna (2) and emission of a second series of electromagnetic waves (262) from the transmitter antenna (2), by a later point of time (t2), with the time difference t2-t1 being typically several hours or days or longer time; v) reception of a second series of reflected electromagnetic waves (851, 852, ..., 85n) by the receiver antennas (81, 82, ..., 8n), optionally signal amplification and transformation of the reflected electromagnetic waves to registrations (S2).</p> |
