| 摘要 |
A downhole mapping system (100) for identifying completion components (33) having an inner surface (74) in a casing in a completion, comprising: - a magnetic sensor tool (1) having a longitudinal tool axis and comprising: - a detecting unit (2) comprising: - a first magnet (4) for generating a magnetic field, and - a first sensor (5) arranged in a first plane (7) and at a first distance (di) from the first magnet, for detecting changes in the magnetic field, the sensor (5) detecting changes in the magnitude and/or direction of the magnetic field producing measured data of a profile of the casing, wherein the downhole mapping system further comprises: - a reference database (34) comprising magnetic reference data of completion components, and - a processor (35) comparing a set of the measured data with reference data from the database (34) for identifying a substantially matching set of data representing a completion component stored in the reference database, wherein the system further comprises a component scanning unit (53) for scanning the inner surface for identifying a component and storing the data representing the component in the database. |
