High Resolution Dual Laterolog

The High Resolution Dual Laterolog (HRDLL) is recommended for use in salt-based mud, and in cases where mud resistivity is considerably lower than formation resistivities or use of the Dual Induction Tool is not practical.

The HRDLL consists of six sets of electrodes centered around a center electrode. Current flow into the formation is directed and controlled to form a shallow and deep current beam. State of the art, self-calibrating DSP based electronics performs all measurement and control functions, eliminating the need for additional uphole circuitry, calibrations or downlink telemetry. The addition of another set of electrodes on the mandrel allows the tool to measure and transmit high-resolution deep and shallow resistivity signals to the surface in real time along with the normal resistivity measurements. Data is transmitted to the surface via our proven PTX telemetry at a rate of 20 times per second.

The dual laterolog tool is designed to operate in a stack with an open-hole gamma module, a CNL (Compensated Neutron Log), a PMSFL (Micro Spherically Focused Laterolog) and any of our existing telemetry based tools. The PMSFL provides the flushed zone R_XO signal. Also, it is recommended that the tool be run in the borehole with either an 80 ft. bridle or a rigid bridle. The return for the deep resistivity is an extra mudfish electrode at the surface. (When running the HRDLL, the truck must be equipped with two mudfish electrodes, for SP measurement (optional) and deep resistivity return.

Related Products

3 5/8" High Resolution Dual Laterolog
Product Reference: 050-HRDLL-0000

050-HRDLL-0015 HRDLL Test Box w/Cables