The Dual Laterolog provides two resistivity measurements, a Shallow reading which investigates the formation near the borehole and a Deep reading which measures farther out in the formation where it’s less disturbed by drilling fluid.

1. The Dual Laterolog provides two resistivity
measurements, a Shallow reading which
investigates the formation near the borehole
and a Deep reading which measures farther out
in the formation where it’s less disturbed by
drilling fluid.

2. LLd and LLs

3. Specifications
 Standard depth of investigation curves: in.(mm)
Measurement Range: 0.2-40,000 ohmm
 Vertical Resolution: 24 in.( 610 mm)
 Mud Resistivity Range: 0.015-3.0 ohmm
 Diameter: 3.62 in.( 91.2 mm)
 MAX. Press: 20,000 psi(137.9 MPa)
 MAX. TEMP.: 350 °F( 177 °C)

4. Applications
Distinguish between saltwater-bearing
and hydrocarbon bearing formations
Determine true formation resistivity
for calculating water saturation
Estimate invasion diameters
Indicate movable hydrocarbons
Correlate formations

5. Features and Benefits
 Unparalleled thin bed analysis
 Can be used as normal resistivity tool, giving two
depths of investigation
 Operates on any standard wireline (Mono, 4, 7
conductor, or Coax)
 Can be combined with other logging tools of the
QL product line or operated as a standalone tool.
 Measurements are accurate and consistent.

11. Devices
Dual Laterolog Tool (EDLT)
Ohm meter
Unit:
Ohm.m
Scale: 0.2-40,000 ohm.m

12. Limitations
 Borehole Fluid
[X] Water
[X] Mud
[_] Dry
 Casing
[X] Uncased
[_] PVC Borehole
[_] Steel
 Centralization
[_] Required
[X] Non-Necessary