CA2254490C - Methode et dispositif pour etudier les formations ecologiques
- Google Patents
Methode et dispositif pour etudier les formations ecologiques
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Publication number
CA2254490C
CA2254490CCA002254490ACA2254490ACA2254490CCA 2254490 CCA2254490 CCA 2254490CCA 002254490 ACA002254490 ACA 002254490ACA 2254490 ACA2254490 ACA 2254490ACA 2254490 CCA2254490 CCA 2254490C
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CA
Canada
Prior art keywords
current
electrode
monitor
transmitter
signal
Prior art date
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Schlumberger Canada Ltd
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Schlumberger Canada Ltd
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Publication date
Priority claimed from US07/786,137external-prioritypatent/US5235285A/en
Priority claimed from US07/955,101external-prioritypatent/US5339037A/en
Application filed by Schlumberger Canada LtdfiledCriticalSchlumberger Canada Ltd
Priority claimed from CA 2081790external-prioritypatent/CA2081790C/fr
Publication of CA2254490A1publicationCriticalpatent/CA2254490A1/fr
Application grantedgrantedCritical
Publication of CA2254490CpublicationCriticalpatent/CA2254490C/fr
Method and apparatus for logging-while-drilling with improved performance through cancellation of systemic errors through combination of signals, utilization of dedicated transmitter drivers, and utilization of selected reference signals
Устройство для измерения электромагнитного свойства земного пласта, пересеченного стволом скважины, и способ измерения электромагнитного свойства земного пласта, пересеченного стволом скважины (варианты)