04427944 is referenced by 35 patents and cites 10 patents.

Method and apparatus for investigating earth formations according to the present invention include positioning an opening of a fluid reservoir in contact with the surface of an earth formation to be investigated and injecting the fluid at high pressures through the opening into the formation to cause a transient electrokinetic potential to form in the formation. The transient streaming potentials generated are detected by appropriate electrodes, and the outputs of the electrodes, representative of the generated potentials, are then processed to determine a characteristic response time of these streaming potentials. Thereafter, from a knowledge of the characteristic response time of the detected streaming potentials a measurement of the permeability of the formation is derived.

Title
System for permeability logging by measuring streaming potentials
Application Number
165997
Publication Number
4427944
Application Date
January 18, 1983
Publication Date
January 24, 1984
Inventor
Richard N Chandler
Houston
TX, US
Agent
Stephen L Borst
Assignee
Schlumberger Technology Corporation
NY, US
IPC
G01V 3/18
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