Transient electromagnetic differential well logging method and system
The invention discloses a transient electromagnetic differential well logging method and system. The transient electromagnetic differential well logging method comprises the steps that transient electromagnetic excitation is carried out on a transmitting coil at a first set depth position in a casin...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a transient electromagnetic differential well logging method and system. The transient electromagnetic differential well logging method comprises the steps that transient electromagnetic excitation is carried out on a transmitting coil at a first set depth position in a casing well, and a first transient electromagnetic response waveform is obtained by utilizing a receiving coil; the transient electromagnetic excitation is carried out on the transmitting coil at a second set depth position in the casing well, and a second transient electromagnetic response waveform is obtained by utilizing the receiving coil; the first transient electromagnetic response waveform is subtracted from the second transient electromagnetic response waveform to obtain a first response difference; a second response difference is determined by utilizing convolution properties according to the first response difference; and according to the second response difference, conductivity well logging curves at differen |
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