MST-DB
RESISTIVITY MICRO SPHERICAL/MICRO LOG TOOL 
MST-DB
Micro Spherical Tool

MST-DB.png

 

MST-DB
Micro Spherical Focused
Presentation

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MST-DB
Micro Log
Presentation

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Part No: 32000 – 4404

DESCRIPTION

The Micro Spherical tool provides a resistivity measurement in the invaded zone. This is useful in distinguishing moveable hydrocarbons. When used in combination with a deep and medium reading resistivity tool, the MST can help estimate Rt (Resistivity of the Virgin Zone). This tool also records a MicroLog with the appropriate pad attached to the backup arm. The MicroLog provides two shallow Depth-of-Investigation (DOI) resistivity values. At 1 inch DOI, the shallower INV is mostly influenced by mud cake. Normal (NOR) at 4 inches DOI is influenced by the flushed formation making this an excellent permeability indicator device.
 

SPECIFICATIONS

Parameters
English
Metric
Pressure
20,000 PSI
1,379 bar
Temperature
350° F
177° C
Weight
200 lbs
90.72 kg
Tool Length
9.66 ft
2.94 m
Transport Length
11.47 ft
3.50 m
Tool OD (MSFL Pad)
5.25 in
13.3 cm
Max. OD (MSFL/Micro pads)
5.75 in
14.6 cm
Tool OD (Micro pad)
4.50 in
11.4 cm
1 From end of top thread protector to end of bottom thread protector.
 

COMBINABLE WITH

The MST is combinable with all TTI open hole tools. Place anywhere below the Gamma Ray/Spectral Gamma Ray tools (GRT), but above the Phased Induction Tool (PIT).

REMARKS

When run in combination with the Dual Laterolog (DLT), the MST replaces the Dual Laterolog Electrode (DLE) to complete the DLT array.
 
This tool can be configured to run in the eccentric mode to prevent caliper collapse in deviated wells.
 
For information on Parts, Test, Calibration and Accessory equipment available for the MST-DB, contact your Tucker Technologies Technical Sales Representative.

LOGGING PARAMETERS

Parameter
English
Metric
Vertical Resolution
  MSFL
2 in
2.54 cm
Depth of Investigation
  MSFL
4 in
10.2 cm
Measurement Range
  MSFL
0.2 – 2000 Ω-m
  Caliper                4.5 in to 18 in (11.4 cm to 45.72 cm)
Maximum Logging Speed
45 ft/Min
13.7 m/Min
Repeatability
  MSFL
 ±5% 0.2-200W-m, ±10% 200-2000W-m
  Caliper
±0.2 in
±5.1 mm
Borehole Range
Minimum
6.0 in
15.2 cm
Maximum
22 in
55.8 cm
 

BOREHOLE ENVIRONMENT

Open hole, fluid filled.
The MST cannot be run in non-conductive fluids such as oil-based muds or air-filled holes.

 

LOGGING PARAMETERS

 
Parameter
English
Metric
Vertical Resolution
  NOR
2.0 in
2.54 cm
  INV
1.0 in
2.54 cm
Depth of Investigation
  NOR
4.0 in
10.2 cm
  INV
1.5 in
3.8 cm
Measurement Range
  NOR
0.2 – 200 Ω-m
  INV
0.2 – 200 Ω-m
  Caliper                  4.5 in to 22 in (11.4 cm to 55.8 cm)
Maximum Logging Speed
45 ft/Min
13.7 m/Min
Repeatability
  NOR                                                                   ±5%
  INV                                                                     ±5%
  Caliper
±0.2 in, ±5.1 mm
Borehole Range
Minimum
6.0 in
15.2 cm
Maximum
22 in
55.8 cm
 

LIMITS

Borehole Environment: open hole, fresh mud, water filled.
The MST cannot be run in non-conductive fluids such as oil-based muds or air-filled holes.
The MLT pad, Inverse-Normal, is a non-focused device; consequently, results maybe hampered in high salinity muds.
 This site and all material contained in it are considered confidential and may not be
reproduced in any form without written consent from TES.
 
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