Apparatus and method for determining parameters of formations surrounding a borehole in a preselected direction
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United States of America Patent
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Apr 16, 1996
Grant Date -
N/A
app pub date -
Nov 20, 1993
filing date -
May 31, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
At least one transmitting coil 1 and at least one receiving coil 2 are disposed along the bore axis 18 of a borehole 7 such that these coils are inclined and face each other, thus causing these coils to have directivity for examining electric characteristics of a formation around the borehole. More specifically, a method of and an apparatus for directional induction logging are provided, which permit measurement of the electric conductivity distribution of a formation in the circumferential direction in a range of several meters around the borehole and also imaging reflecting the electric conductivity.
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