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Nuclear magnetic tomography logging tool YaMTK


The tool has the following modifications by max operating temperature T max and upper value of borehole hydrostatic pressure Pmax  :
 by temperature: 120, 150°С,
 by pressure: 80, 110 МPа.
Designed for determination of pore space structure, reservoir properties, compound and properties of fluids based on measurement and processing of relaxation curve (Т2) of fluids filling the pore space

Used for open vertical and slightly deviated (up to 27°) wells while round trip wireline operations; for cased well bores of special design with fibre-glass liners; it can be used in holes with drift diameter not less than 170 mm and open hole nominal diameter from 190 to 290 mm. Mud is non-conducting and conducting (with resistivity more than 0.03 Оhm·m) without additions of magnetic minerals based (haematite and others) weighting materials. Type of the used cable – three-conductor and seven-conductor cable.


 study of pore space structure of sedimentary, magmatic, metamorphic rocks including porosity distribution evaluation according to pores sizes and thereupon reservoir properties analysis;

 study of residual fluid presence, compound and properties in the investigated zone.

Sonde formula - dipole lateral sonde.

 Measured parameters Signal amplitude Время продольной релаксации Error
Measurement range 1÷100% porosity 1÷3000 msec 1.5% porosity

 General specifications
Tool length, mm 6800 not more than
Tool diameter, mm 145 not more than
Tool diameter with stangoffs, mm 165 not more than
Tool weight, kg 250 not more than
Power supply:
supply voltage, V
supply frequency, Hz


Borehole diameter, mm 190÷295  
Logging speed, m/hr 100  
Records frequency, pollings per 1 m 5  
Combinability bottom  
Location in the borehole must be centralized