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Compensation of errors in logging-while-drilling density measurements

  • US 6,307,199 B1
  • Filed: 05/12/1999
  • Issued: 10/23/2001
  • Est. Priority Date: 05/12/1999
  • Status: Expired due to Term
First Claim
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1. A method for a determining a property of earth formation penetrated by a borehole, the method comprising:

  • (a) conveying at least one sensor within said borehole, wherein said sensor is either rotating or stationary within said borehole;

    (b) measuring a responses of said sensor in a plurality of azimuthal borehole segments;

    (c) determining, for each said segment, a segment formation property from said sensor response within that segment;

    (d) forming a two-dimensional image of formation property from a plurality of said segment formation properties; and

    (e) using said image to identify segment formation properties of substantially constant value and combining these segments to form a one-dimensional log of said formation property with respect to an azimuthal reference vector.

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