Patent ID: 6393364
Filing Date: 2002-05-21
Classification: E21B,G01V

Abstract:
A method for determining conductivity in a formation, wherein the method comprises:measuring a magnetic coupling between transmitter coils and receiver coils of a tool in a borehole traversing the formation; obtaining from the measured coupling a strike angle between the tool and the formation; obtaining from the measured coupling an initial dip angle between the tool and the formation; obtaining from the measured coupling an initial anisotropic factor of the formation; obtaining from the measured coupling an initial horizontal conductivity of the formation; determining an iterative anisotropic factor from the measured coupling, the strike angle, the latest dip angle, and the latest anistropic factor; determining an iterative horizontal conductivity from the measured coupling, the strike angle, the latest iterative anisotropic factor, and the latest dip angle; and determining an iterative dip angle from the measured coupling, the latest iterative anisotropic factor, and the latest iterative horizontal conductivity.