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METHODS AND APPARATUS TO PERFORM PRESSURE TESTING OF GEOLOGICAL FORMATIONS

  • US 20100050762A1
  • Filed: 09/02/2008
  • Published: 03/04/2010
  • Est. Priority Date: 09/02/2008
  • Status: Active Grant
First Claim
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1. A method for pressure testing a geological formation comprising:

  • positioning a testing tool in a wellbore formed in the geological formation;

    sealing a sample interval around the testing tool;

    sealing a first guard interval around the testing tool and adjacent to the sample interval;

    reducing a first pressure in the sample interval;

    reducing a second pressure in the first guard interval;

    maintaining a volume of a first chamber fluidly coupled to the sample interval during a time interval; and

    measuring a plurality of pressure data for a fluid captured in the first chamber during the time interval.

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