You are here

Induction logging memory tool 5IK-A


The tool has the following modifications by max operating temperature T max and upper value of borehole hydrostatic pressure Pmax :
  T max =90 °C, Pmax= 80 MPa;
  T max =120 °C, Pmax= 80 MPa;
Designed for induction logging (without usage of logging cable) using 5 sondes that have different depth of penetration with simultaneous recording of apparent conductivity active and reactive components for every sonde. Self-polarization curve (SP) is also recorded. 

Used for logging of nearly horizontal and horizontal sections of open oil and gas holes filled with any fluid without magnetic additive compounds.

 identification of electrically homogeneous formations and formations with invaded zone, invasion type identification;
 determination of competent part of the formation and flushed zone resistivity, and flushed zone depth estimation;
 longitudinal resistivity determination and evaluation of vertical anisotropy factor of impermeable formations and formations with shallow invaded zone in horizontal wells;
 permeable intervals identification, saturation character and oil and gas saturation evaluation.

5IK-A tool contains five three-coil IL sondes –  3I0.3, 3I0.5, 3I0.85, 3I1.26, 3I2.05. All sondes have common receiving coil, common measuring channel and operate at the same frequency of 100 kHz. It is possible to use Ø124 mm, Ø190 mm standoffs.


Measured parameters Measurement range Basic error
Sonde Channel σa, mCm/m ρa, Ohm·m ±(0.03×σa+1 mCm/m)
3I0.3 active 3÷2000 0.3÷300
reactive 3÷1500 0.3÷15
3I0.5 active 3÷1500 0.3÷300
reactive 3÷1500 0.3÷20
3I0.85 active 3÷1000 0.3÷300
reactive 3÷1000 0.3÷30
3I1.26 active 3÷500 0.6÷300
reactive 3÷1000 0.3÷35
3I2.05 active 3÷300 1.0÷300
reactive 3÷700 0.3÷45

 General specifications
Tool length, mm 5410 not more than
Tool diameter, mm 90 not more than
Tool weight, kg 120 not more than
Power supply, self-contained, V 12  
Ambient operating temperature range, °C from -10 to +90
not more than
Max operating pressure, MPa 80 not more than
Borehole diameter, mm 120÷400  
Logging speed, m/ hr 800  
Operating time in memory mode,  hours in record mode 8 not less than
Records frequency, pollings per sec 1  
Location on the drilling tool