Intelligent Litho-Density (iLD)

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The Intelligent Litho-Density tool utilizes a Cesium (Cs137) gamma ray source to bombard the formation. Dual detectors measure the energy spectrum and count rates of returned gamma rays whereby both the bulk density and the photoelectric absorption index are calculated. A motorized caliper arm is used to ensure pad contact with the borehole wall, reducing environmental effects while simultaneously providing a hole diameter measurement.

LOGGING APPLICATIONS:

  • Determination of bulk density
  • Formation porosity
  • Lithology identification
  • Identification of gas zones
  • Identification of washouts
  • Borehole volume

MECHANICAL:

LENGTH 10.9 ft (3.3 m)
DIAMETER 2.25 in (57 mm)
WEIGHT 128 lbs (58.2 kg)
PRESSURE RATING 20,000 psi (140 Mpa)
TEMP RATING 350 °F (175 °C)
MAX HOLE SIZE 14 in
TENSILE STRENGTH 48,000 lbs (213,514 N)

MEASUREMENT:

OUTPUT Bulk Density, PE, Caliper
RANGE 1.2-3.0 g/cc, 0-10 b/el, 3-20 in
VERTICAL RESOLUTION 12 in (30 cm)
ACCURACY +/-0.015 g/cc, +/-0.15 b/e, +/-0.15 in
DEPTH OF INVESTIGATION 9 in (23 cm)