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Azimuthal Gamma (Probe-based)

Introduction
Azimuthal Gamma Probe-based can realize the detection of formation lithology while drilling, especially maintain borehole trajectory within the target reservoir in horizontal-drilling. It can provide for interpretation of the shale reservoir's organic richness and clay content, identify the top or bottom boundary in CBM. Azimuthal Gamma Probe-based is particularly valuable in unconventional reservoir well placement and evaluation as well as CBM drilling applications.
Features
● Lithology identification
● Qualitative evaluation of shale content and radioactive mineral
● Dynamic rotary geosteering (upper gamma and lower gamma) during drilling
● Eliminate the interference of clay composition to sandstone and sand determination
● Installed on inclinometer while drilling, easy to use
● LHE623501/LHE625601 series MWD can be mounted after firmware upgrade
● Can be matched with MWD of other manufacturers
Application
● Development of oil sheet and CBM
● Measure natural gamma in specific direction
● Determine the interface position and dip angle of different formation
Technical Parameters
Operating temperature
Up to 150°C / 302°F
Up to 175°C / 347°F
Max. pressure
140MPa(20,000psi)
Sensitivity
≥0.3CPS/API
Accuracy
≤150°C / 302°F:±5%/150 to 175°C/302 to 347°F:±10%
Detection range
200mm
Sine Vibration
10g 50 to 200Hz
20g 30 to 200Hz
 
Random vibration
10grms,50 to 200Hz
Shock
X-axis or Y-axis:1000g/0.5ms1/2Sine wave
Z-axis:500g/0.5ms1/2Sine wave
Operating voltage
20 to 30VDC
Gamma window range
75°
Rotation speed
0 to 200r/min
OD
φ48mm