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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.
Applications:
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
(+120) |
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 |
|
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