gas quality control
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04_MONITORING Gas Quality Control
TM 00 – September 2010 Page 1 of 12
SAERT3
GAS QUALITY CONTROL DRAFT ONLY
UU SS EE RR MM AA NNUUAA LL
04_MONITORING Gas Quality Control
TM 00 – September 2010 Page 2 of 12
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Procedure to follow to ensure GOOD QUALITY GAS DATA STORED IN DEPTH DB:
1. Hardware part is controlled: � Degasser working & in a good position � Line is not plugged � Filters & Dryers are OK � Retention times are OK � Calibrations (accuracy & retention times) are OK
04_MONITORING Gas Quality Control
TM 00 – September 2010 Page 3 of 12
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Procedure to follow to ensure GOOD QUALITY GAS DATA STORED IN DEPTH DB:
2. Correct RT_Catalog Settings: Gas Instantaneous Readings:
Indexes of Synchronization:
Gas Synchronized for the Maximum to be stored in De pth DB:
04_MONITORING Gas Quality Control
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Procedure to follow to ensure GOOD QUALITY GAS DATA STORED IN DEPTH DB:
3. Depth Synchronization: Check Correct Synthesis (all green while drilling):
Check Annular Samples Depth Based:
Check Annular Samples Time Based:
04_MONITORING Gas Quality Control
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Procedure to follow to ensure GOOD QUALITY GAS DATA STORED IN DEPTH DB:
Control w GeoDesk Panel:
Next depth to be stored: 99 62 10 Next depth to be lagged: 19 30 93
They are ALWAYS the same. It correspond to TMD rounded at the next foot or the next 0.25m.
LD SH 5s: 19 33 50: Lagged Bit Position Instantaneo us @ Shakers LD SH Int: 19 30 82: Lagged TMD @ Shakers LD GD: 12 02 02: Depth to associate to the current GD analysis LD GC: 12 02 01: Depth to associate to the current GC analysis Control w Aphanumeric Panel:
A simple control of these values will IMMEDIATELY i ndicate the status of the Depth Synchronization.
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Procedure to follow to ensure GOOD QUALITY GAS DATA STORED IN DEPTH DB:
4. Depth Storage: Control the Depth Storage Status:
Control the Depth DB w DDE:
Drilling_01 MUST be updated until this depth:
04_MONITORING Gas Quality Control
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Procedure to follow to ensure GOOD QUALITY GAS DATA STORED IN DEPTH DB:
5. Gas Quality Ratio (GQR) Real Time Alphanumeric:
GQR of the last analysis GQR of the Max stored in Depth DB
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Procedure to follow to ensure GOOD QUALITY GAS DATA STORED IN DEPTH DB:
Gas Quality Ratio (GQR) Real Time Graphic:
Following the 5 described steps IT IS IMPOSSIBLE TO STORE BAD GAS READINGS
� Hardware � RT_Catalog Settings � Depth Synchronization � Depth Storage � Gas Quality Ratio Real Time
IMMEDIATELY ALERT THE BASE IF ANY ANOMALY ENCOUNTER ED
04_MONITORING Gas Quality Control
TM 00 – September 2010 Page 9 of 12
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Procedure to follow to ensure GOOD QUALITY GAS DATA STORED IN DEPTH DB:
6. Off-line control of the GQR:
It is a very basic configuration showing CLEARLY that the QC is around 1, when all components are higher than 10ppm (threshold of quan tifiable value). Normally C1>C2>C3>C4>C5. The Interpretation (in this case Balance Wetness & Character) WILL NOT HELP YOU FOR QUALITY CONTROL.
04_MONITORING Gas Quality Control
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Clear example of excellent calibration: only C1 and C2 > 10ppm giving a QC of 1.
04_MONITORING Gas Quality Control
TM 00 – September 2010 Page 11 of 12
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Clear example of bad QC due to low concentration (l ess than 10ppm).
04_MONITORING Gas Quality Control
TM 00 – September 2010 Page 12 of 12
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Clear example of good QC with the 7 components high er than 10ppm. ì