0527089-A2 is referenced by 34 patents and cites 2 patents.

The disclosed technique and apparatus utilizes the different characteristic responses of a plurality of signals from a propagation or induction well logging device to determine the vertical and horizontal resistivity of formations surrounding a borehole. In a disclosed embodiment, a method is set forth for determining the horizontal conductivity and the vertical conductivity of formations surrounding an earth borehole, including the following steps: a) deriving first and second formation conductivity values from measurements taken in the borehole; b) selecting a horizontal conductivity model value and a vertical conductivity model value; c) computing error values from the differences between: (i) first and second composite conductivity values computed as a function of the horizontal and vertical conductivity model values, and (ii) the first and second derived formation conductivity values; d) modifying the horizontal and vertical conductivity model values; e) repeating steps (c) and (d) until predetermined criteria of the error values are met; and f) outputting modified horizontal and vertical conductivity model values.

Title
Method and apparatus for determining horizontal conductivity and vertical conductivity of earth formations.
Application Number
EP19920402243 19920806
Publication Number
0527089 (A2)
Application Date
August 6, 1992
Publication Date
February 10, 1993
Inventor
Rosthal Richard A
US
Assignee
Schlumberger Holdings
VG
Schlumberger Technology
NL
Schlumberger Services Petrol
FR
Schlumberger
US
IPC
G01V 03/30
G01V 03/12
G01V 03/38
G01V 03/18
G01V 03/38
G01V 03/28
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