Description
A-One Oil Gamma Ray Tool (GRT43C) is commonly used in the oil and gas industry to measure the natural gamma radiation emitted by formations. By analyzing the intensity and distribution of gamma rays, it can provide valuable information about lithology, porosity, and other formation properties. It is often used in conjunction with other logging tools such as CCL and Well Temperature Logging to provide a more comprehensive dataset.
Principle of Natural Gamma Ray Measurement
The natural gamma ray section consists of a photomultiplier tube (PMT) and a sodium iodide (NaI) scintillation crystal. The sensor detects gamma radiation emitted from the geological formations.
Technical Parameters
|
General Spec |
|
|
Maximum Pressure |
15,000PSI (103MPa) |
|
Minimum Temperature |
-4 °F (-20°C) |
|
Maximum Temperature |
350°F (175°C) |
|
Diameter |
43mm (1-11/16 in) |
|
Tool Length |
1230mm (48.42in) |
|
Effective Length |
1180mm (46.45in) |
|
Weight |
7.5kg (16.53lbs) |
|
Maximum Logging Speed |
32 ft/min (600 m/h) |
|
Working Voltage |
15VDC~30VDC |
|
Zero Length |
GR Section - 15.15in (385mm) |
|
CCL Section - 37.91in (963mm) |
|
|
Temperature Section - 6.5in(165mm) |
|
|
Gamma |
|
|
Test Range Resolution |
0 ~10,000 CPS 1 CPS |
|
Background Noise |
≥100 CPS |
|
Sensor Type |
NaI |
|
Fluctuation Range |
≤ 7% |
|
High-Pressure Range |
< 2000V |
|
Dynamic Range |
10 kHz ~ 50 kHz |
|
SNR |
≥ 5 kHz |
|
Temperature |
|
|
Probe Type |
PT100 |
|
Test Range |
-13°F ~ 350°F (-25°C~175°C) |
|
Accuracy |
±1.8°F (±1°C) |
|
Resolution |
0.09°F (0.05°C) |
|
Response Time |
≤ 1S |
|
CCL |
|
|
Signal Range |
0 ~3300 (mv) |
|
SNR |
≥ 5 kHz |
|
Signal Transmission |
|
|
Tool Bus Type |
CAN |
|
Signal Transmission Rate |
1Mbit/s |
Applications
◆ The Gamma Ray Tool (GRT43C) application in correlation of cased hole logging curves between the casing and the wellbore.
◆ Depth control
◆ Identify the lithology, aquifers, oil layers, etc
◆ Leakage inspection using a high-resolution temperature logger
◆ Combinate with CCL and Well Temperature Logging to improve logging accuracy and reliability
◆ Engineering Application: Guide the selection of casing depth and perforation position.
FAQ
Q: Does Gamma Ray Tool (GRT43C) is for real-time mode or memory mode?
A: Memory mode.
Q: Do you have case studies of actual data of tool in operations?
A: Yes, we have.
Q: How to operate the tools?
A: We will provide the Operating Manual.
In addition, our technical team will arrange professional operators to conduct online training for you . Easy to operate and safe to use.
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