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:
May. 07, 2013
Filed:
Mar. 06, 2007
Leonard J. Srnka, Bellaire, TX (US);
James J. Carazzone, Houston, TX (US);
Dmitriy A. Pavlov, The Woodlands, TX (US);
Leonard J. Srnka, Bellaire, TX (US);
James J. Carazzone, Houston, TX (US);
Dmitriy A. Pavlov, The Woodlands, TX (US);
ExxonMobil Upstream Research Company, Houston, TX (US);
Abstract
Method for determining time-dependent changes [] in the earth vertical and horizontal electrical resistivity and fluid saturations from offshore electromagnetic survey measurements. The method requires both online and offline data, which should include at least one electromagnetic field component sensitive at least predominantly to vertical resistivity and another component sensitive at least predominately to horizontal resistivity []. Using a horizontal electric dipole source, online Ez and offline Hz measurements are preferred. For a horizontal magnetic dipole source, online Hand offline Edata are preferred. Magnetotelluric data may be substituted for controlled source data sensitive at least predominantly to horizontal resistivity. Maxwell's equations are solved by forward modeling [or by inversion [, using resistivity models of the subsurface that are either isotropic contrast, and [or anisotropic [. Fluid saturation is determined from the vertical and horizontal resistivities using empirical relations or rock physics models [