The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 2009
Filed:
Apr. 01, 2005
Tage Røsten, Trondheim, NO;
Lasse Amundsen, Trondheim, NO;
Tage Røsten, Trondheim, NO;
Lasse Amundsen, Trondheim, NO;
Statoil ASA, Stavanger, NO;
Abstract
A method of deriving a calibration filter for electromagnetic data is provided. The method comprises providing a source () of electromagnetic radiation and subsequently measuring components of the source electromagnetic field () at a receiver when the source is sufficiently close to the receiver that the down-going signal dominates over the up-going signal reflected from features below the receiver. Such a measurement can be used in frequency domain analysis () to extract the down-going signal component and derive a calibration filter for the receiver. The method is repeated () for each receiver used in an electromagnetic sounding survey.