The RG dual laterolog provides deep and medium penetrating resistivity measurements using a classic laterolog-9 electrode configuration. It is the preferred alternative to the array induction probe in saline drilling muds.
An alternating current from a centre electrode A0 passes through the formation and returns to a surface fish (deep resistivity) or to electrodes A2 and A2’ on the probe (shallow resistivity). A bucking current flowing from the guard- electrode pair A1 and A1’ is controlled to maintain the monitor electrode pairs M1M2 and M1’M2’ at the same potential. These equipotential surfaces constrain the measure current path to a disc of thickness 2ft.
|Total length:||9.04m (357”) (in 3 sections)|
|Max section length:||3.37m (133”)|
|Max. pressure:||86MPa (12,500psi)|
|Range:||0.1 to 40,000ohm-m|
|Accuracy:||5% at 1000ohm-m|
|Resolution:||1% measured value|
Borehole type: Open-hole, mud filled 4” – 12”
|I0013886||Dual laterolog probe|
|I0015009||Solid bridle with reference electrode|
|I0013888||Field test box with leads and clamps|
|I0015341||Centraliser (2 required)|
...Practical Innovation with Global Service & Support...
Robertson Geologging Ltd., 2017
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