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Title: Directional antennas for electromagnetic mapping in a borehole

A bottom hole assembly used for a field operation is disclosed herein. The bottom hole assembly can include at least one directional antenna disposed on an outer surface of a first tubing pipe of a tubing string, where the at least one directional antenna receives a first electric current from at least one power source, where the first electric current generates a first magnetic field that radiates from the at least one directional antenna into a formation. The bottom hole assembly can also include at least one receiver disposed on a second tubing pipe of the tubing string, where the at least one receiver receives the first magnetic field returning from the formation.
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Issue Date:
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Patent Number(s):
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Resource Relation:
Patent File Date: 2014 Sep 26
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Electromagnetic propagation tool using magnetic dipole antennas
patent, February 1996

Apparatus and method for determining parameters of formations surrounding a borehole in a preselected direction
patent, April 1996

Method and apparatus for transverse electromagnetic induction well logging
patent, July 1998

Method and apparatus for directional measurement of subsurface electrical properties
patent, August 2000

Method and apparatus for directional well logging with a shield having sloped slots
patent, October 2001

Method and apparatus for evaluating the resistivity of formations with high dip angles or high-contrast thin layers
patent, October 2001

Multi-component induction instrument
patent, January 2004

Method for determining direction to a target formation from a wellbore by analyzing multi-component electromagnetic induction signals
patent, October 2005

Determination of borehole geometry inside cased wells with crosswell electromagnetics
patent, August 2006

Error correction and calibration of a deep reading propagation resistivity tool
patent, November 2006

Pulsed electric rock drilling apparatus
patent, August 2008

Externally guided and directed field induction resistivity tool
patent, October 2009

Logging tool with independently energizable transmitters
patent, October 2011

Measurement while drilling pulser with turbine power generation unit
patent, March 2012

Apparatus and method for detection of position of a component in an earth formation
patent, October 2012

Apparatus and method for downhole electromagnetic measurement while drilling
patent, June 2013

Method and Apparatus for Well-bore Proximity Measurement While Drilling
patent-application, January 2008

Directional Resistivity Antenna Shield
patent-application, March 2011

Directional Resistivity Measurement For Well Placement And Formation Evaluation
patent-application, September 2011

Antenna With A Concentrated Magnetic Field
patent-application, June 2014

Look Ahead Logging System
patent-application, January 2015

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