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Integrated permeability measurement and resistivity imaging tool

  • US 5,335,542 A
  • Filed: 02/12/1993
  • Issued: 08/09/1994
  • Est. Priority Date: 09/17/1991
  • Status: Expired due to Term
First Claim
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1. Apparatus for the investigation of an earth formation transverse by a borehole, comprising:

  • a) a plurality of electrode means for making electrical contact with a segment of a wall of said borehole and for making electrical measurements relating to an electromagnetic investigation of said earth formation adjacent said segment of said borehole wall;

    b) hydraulic port means for making hydraulic contact with said formation;

    c) flow means coupled to said hydraulic port for accomplishing at least one of injecting fluid into said formation and withdrawing fluid from said formation via said hydraulic port;

    d) hydraulic property measurement means for determining pressures at said hydraulic port during withdrawal of fluid from said formation or during injection of fluid into said formation, wherein, said plurality of electrode means make said electrical measurements during said withdrawal of fluid from said formation or during said injection of fluid into said formation, and said hydraulic port means is sufficiently adjacent said plurality of electrode means such that said electrical measurements are impacted by said withdrawal of fluid or said injection of fluid.

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