06044325 is referenced by 97 patents and cites 4 patents.

A method for generating an improved estimate of horizontal conductivity, dip angle, azimuth and anisotropy parameter of an earth formation penetrated by a wellbore from dual-frequency transverse electromagnetic induction measurements, comprising generating an initial estimate of the horizontal conductivity, dip angle, azimuth and anisotropy parameter from the dual-frequency transverse induction measurements made at each one of a plurality of base frequencies. The initial estimates from each of the plurality of base frequencies are input into a primary trained neural network, and the improved estimate is calculated by the trained neural network. The network is trained by generating models of earth formations each having a known value of horizontal conductivity, anisotropy parameter, dip angle and azimuth. Voltages which would be measured by the transverse electromagnetic induction instrument in response to each model are synthesized. Initial estimates from the synthesized voltages are calculated and the initial estimates and known values from each of the models are input to the neural network to cause it to learn a relationship between the initial estimates and the known values.

Title
Conductivity anisotropy estimation method for inversion processing of measurements made by a transverse electromagnetic induction logging instrument
Application Number
42982
Publication Number
6044325
Application Date
July 21, 1998
Publication Date
March 28, 2000
Inventor
Otto N Fanini
Houston
TX, US
Berthold F Kriegshauser
Houston
TX, US
Raghu Chunduru
Webster
TX, US
Pravin Gupta
Houston
TX, US
Srinivasa Chakravarthy
Houston
TX, US
Agent
Richard A Fagin
Assignee
Western Atlas International
TX, US
IPC
G06F 19/00
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