Reservoir Monitoring in Low-Salinity Environments With Pulsed-Neutron-Capture and Gamma Ray Logs

1993 ◽  
Vol 8 (03) ◽  
pp. 177-183
Author(s):  
Andrew A. Mills
Keyword(s):  
Neutron Capture ◽  
Gamma Ray ◽  
Low Salinity ◽  
Reservoir Monitoring ◽  
Pulsed Neutron

Reservoir Monitoring with Pulsed Neutron Capture Logs

2005 ◽  
Author(s):  
Charles W. Morris ◽  
Frank Morris ◽  
Timothy Michael Quinlan ◽  
Taha A. Aswad
Keyword(s):  
Neutron Capture ◽  
Reservoir Monitoring ◽  
Pulsed Neutron

Resolving the Mixed Salinity Challenges with a Methodology Developed from Pulsed Neutron Capture Gamma Ray Spectral Measurements

2014 ◽  
Author(s):  
Shouxiang Mark Ma ◽  
Harold Pfutzner ◽  
Adbalrasool Abdallah Al Hajari ◽  
Nedal Mohamed Al-musharfi ◽  
Pablo Jose Saldungaray ◽  
...  
Keyword(s):  
Neutron Capture ◽  
Gamma Ray ◽  
Spectral Measurements ◽  
Pulsed Neutron

Reservoir Monitoring with Pulsed Neutron Capture Logs (SPE94199)

2005 ◽  
Author(s):  
C. Morris ◽  
T. Aswad ◽  
F. Morris ◽  
T. Quinlan
Keyword(s):  
Neutron Capture ◽  
Reservoir Monitoring ◽  
Pulsed Neutron

Improved Pulsed Neutron Capture Logging With Slim Carbon-Oxygen Tools: Methodology

1995 ◽  
Author(s):  
R.E. Plasek ◽  
R.A. Adolph ◽  
C. Stoller ◽  
D.J. Willis ◽  
E.E. Bordon ◽  
...  
Keyword(s):  
Neutron Capture ◽  
Pulsed Neutron

Neutron-capture gamma-ray technique for scale identification inside pipes

Desalination ◽  
1989 ◽  
Vol 75 ◽  
pp. 199-210 ◽  
Author(s):  
Samir Abdul-Majid ◽  
Uthman Dawood
Keyword(s):  
Neutron Capture ◽  
Gamma Ray

Well Integrity Catastrophe Avoided Through Advanced Well Integrity and Reservoir Monitoring Analysis, a Case Study

2021 ◽  
Author(s):  
Mohamed Elyas ◽  
Sherif Aly ◽  
Uche Achinanya ◽  
Sergey Prosvirkin ◽  
Shayma AlSaffar ◽  
...  
Keyword(s):  
Geothermal Gradient ◽  
Root Cause ◽  
Well Integrity ◽  
Reservoir Monitoring ◽  
Precision Temperature ◽  
Zonal Isolation ◽  
Potential Failure ◽  
Corrective Actions ◽  
Thickness Measurements ◽  
Pulsed Neutron

Abstract Well integrity is one of the main challenges that are facing operators, finding the source of the well problem and isolating it before a catastrophic event occurs. This study demonstrates the power of integrating different reservoir monitoring and well integrity logs to evaluate well integrity, identify the underlying cause of the potential failure, and providing a potential corrective solution. Recently, some Injector/producer wells reported migration of injection fluids/gas into shallower sections, charging these formations and increasing the risk of compromised well integrity. Characterization of the well issues required integration of multi-detector pulsed-neutron, well integrity (multi finger caliper, multi-barrier corrosion, cement evaluation, and casing thickness measurements), high precision temperature logs and spectral noise logs. After data integration, detailed analysis was performed to specifically find the unique issues in each well and assess possible corrective actions. The integrated well integrity logs clearly showed different 9.625-inch and 13.375-inch casings leak points. The reservoir monitoring logs showed lateral and vertical gas and water movements across Wara, Tayarat, Rus, and Radhuma formations. Cement evaluation loges showed no primary cement behind the first barrier casing which was the root cause of the problem. Therefore, the proposed solution, was a cement squeeze. Post squeeze, re-logging occurred, validating zonal isolation and a return of a standard geothermal gradient across the Tayarat formation. Most importantly, the cement evaluation identified good bond from the squeeze point clear to surface, isolating all formations. All these wells were returned to service (injector/producer), daily annular pressure monitoring confirmed that no further pressure build up was seen. Kuwait Oil Company managed to avoid a catastrophic well integrity event on these wells and utilized the approach presented to take the proper corrective actions, and validate that the action taken resolved the initial well integrity issues. Consequently, the wells were returned to service, and the company avoided a costly high probability blowout.

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