Well Integrity Assurance: A Successful Method for External Corrosion and Damage Detection on Outer and Middle Concentric Strings of Casing

2007 ◽  
Author(s):  
Mary Jean Loveland ◽  
Joey P. Burton
Keyword(s):  
Damage Detection ◽  
Successful Method ◽  
Well Integrity ◽  
External Corrosion ◽  
Integrity Assurance

Generating Value from Mature Gas Fields by Quantifying Well Integrity Assurance with a Critical Analysis of Multiple Logs & Retrieved Tubular Surface Inspection

2021 ◽  
Author(s):  
Christna Golaco ◽  
Siddharth Jain ◽  
Shams Obaid ◽  
Faisal Al Nakeeb
Keyword(s):  
Critical Analysis ◽  
Surface Inspection ◽  
Business Decisions ◽  
Well Integrity ◽  
Actual Observation ◽  
Tubular Surface ◽  
External Corrosion ◽  
Integrity Assurance ◽  
The Cost

Abstract Sharjah National Oil Corporation (SNOC) operates 4 onshore gas condensate reservoirs of which 3 are very mature consisting of 50+ wells producing corrosive hydrocarbons for over 30 years. The integrity of these legacy wells is frequently questioned before any development is conceptualized, thus making it critical to evaluate the well integrity. The cost associated with pulling completions for their evaluation and running logs in all wells is significant and the availability of various emerging technologies for corrosion analysis in the market makes it challenging to choose the most reliable one. This paper focuses on the detailed analysis and comparison of electromagnetic thickness logs run in 10% of the well stock from 2016 to post-workover surface inspection of the downhole recovered tubing's in 2020/21. It also quantifies how correlating different logging technologies for well integrity increases the reliability of the electromagnetic technology applied on offset wells. The paper also showcases a comparison between mechanical and electromagnetic thickness evaluation of the production casing in-situ. Data from all the available logs from past 5 years was compiled for 6 wells. On recovery of the downhole completion tubings via a hydraulic workover, an ultrasonic (UT) inspection was performed on them at surface. Both sets of results (logs and surface inspection) were analyzed on the same logging track to give a comprehensive comparison of actual observation on surface vs the measurement by in-situ logging. Another multi-barrier corrosion and caliper log were run in the production casing to analyze their outcomes alongside older results. The final step was a comparison of all available data to create a broad well integrity profile. It was observed that the remaining production tubing metal thickness detected by electromagnetic tool (logs) and surface ultrasonic measurements were in good conformance (+/-10%). In the corrosion evaluation of the production casing, the electromagnetic tool matched extremely well with the caliper log results. This shows a large reliability of this technology to quantify corrosion in offset wells. The correlation of logs with surface inspection results across wells in the same reservoir did not indicate a strong presence of external corrosion. The study enables the management to make critical business decisions on utilizing the well stock for the future. This work is the first time a comprehensive and critical analysis on the electromagnetic thickness logging technology has been done, comparing their results of remaining wall thickness to various technologies in-situ and on surface. The analysis not only compares technology from various providers, but also mechanical vs electromagnetic measurements along with their respective advantages in quantifying well integrity assurance. The paper also gives an idea on the condition of L-80 tubulars under service for 30+ years.

scholarly journals A probabilistic method for structural integrity assurance based on damage detection structural health monitoring data

2021 ◽  
pp. 147592172110388
Author(s):  
Michael Siu Hey Leung ◽  
Joseph Corcoran
Keyword(s):  
Damage Detection ◽  
Particle Filtering ◽  
Structural Integrity ◽  
Probabilistic Method ◽  
Probability Of Detection ◽  
Monitoring Systems ◽  
Negative Results ◽  
Systematic Effects ◽  
Detection Capabilities ◽  
Integrity Assurance

The value of using permanently installed monitoring systems for managing the life of an engineering asset is determined by the confidence in its damage detection capabilities. A framework is proposed that integrates detection data from permanently installed monitoring systems with probabilistic structural integrity assessments. Probability of detection (POD) curves are used in combination with particle filtering methods to recursively update a distribution of postulated defect size given a series of negative results (i.e. no defects detected). The negative monitoring results continuously filter out possible cases of severe damage, which in turn updates the estimated probability of failure. An implementation of the particle filtering method that takes into account the effect of systematic uncertainty in the detection capabilities of a monitoring system is also proposed, addressing the problem of whether negative measurements are simply a consequence of defects occurring outside the sensors field of view. A simulated example of fatigue crack growth is used to demonstrate the proposed framework. The results demonstrate that permanently installed sensors with low susceptibility to systematic effects may be used to maintain confidence in fitness-for-service while relying on fewer inspections. The framework provides a method for using permanently installed sensors to achieve continuous assessments of fitness-for-service for improved integrity management.

Successful Well Integrity Assurance with ESP packer utilization – A Case in South Sumatra On-Shore

2020 ◽  
Author(s):  
M. Adi
Keyword(s):  
Reservoir Pressure ◽  
Production Facility ◽  
Operational Risks ◽  
Well Integrity ◽  
Artificial Lift ◽  
Integrity Assurance ◽  
The Way

Most ESP systems are deployed in sub-hydrostatic wells which require artificial lift to produce the fluids. Meanwhile, some ESP are deployed to boost production in wells with sufficient reservoir pressure to flow naturally. Well JN X2 is a well in the JN Field, South Sumatera Block where an ESP was installed. Well integrity was good at the beginning of ESP installation but as the well is getting older a casing leak that resulted in fluid bypassing was found. A casing clamp was immediately installed to contain the leak fluid in order to minimize environmental and operational risks. Further investigation was carried out to find the most suitable long-term remediation method. This started with locating the leak in the production casing through CBL-VDL evaluation, Magnetic Thickness Detector (MTD) and also Acoustic Leak Flow Analyzer (ALFA)-Temp log. From all the gathered data, a well remediation was proposed to assure well integrity so that produced fluid can only reach surface through designated production string, instead of bypassing through any leak. A cementing job was firstly done to repair cement bonding above the estimated top of cement behind 5-1/2” casing at 4,005 ft MD to prevent any channeling from the formation. Unfortunately, one of the leak points was identified near the surface and cementing could not be done all the way up considering casing condition around the leak depth which has deteriorated and risk of breaking the 9-5/8” casing shoe. A solution to install new ESP string design with packer was proposed and installed to contain the fluid within production string/casing until production facility at surface. Packer integrity was tested by opening the casing valve and no more fluid observed flowing to surface.

scholarly journals Well Integrity Management: A Recommendation for Indonesia's Well Life Cycle

2021 ◽  
Vol 10 (1) ◽  
pp. 52-62
Author(s):  
Ganesha R Darmawan
Keyword(s):  
Life Cycle ◽  
Oil And Gas ◽  
Gas Field ◽  
Well Production ◽  
Well Integrity ◽  
The People ◽  
Oil And Gas Field ◽  
Integrity Management ◽  
The Government ◽  
Integrity Assurance

Indonesia oil and gas field mostly are brownfields which were drilled in the late '40s up to '90s. Development and further development of a new structure throughout the years is done, including drilling exploration wells with new play and development wells. Now, most well locations become a populated village and might raise the potential risk to the people and environment. To fulfil safety commitment, well production operations have to be done safely to the people and environment. Currently, there are no specific data that has registered all the wells in Indonesia. This issue is critical for Government and the operating companies to prepare for abandonment waves to prevent methane emissions from abandoned wells. Well Integrity Management, including well registering/database, reporting, risk assessment of trouble wells, and way forward for all the wells, should be initiated by the Government to ensure integrity assurance. It aims to prevent unwanted event in the future, including when the well is permanently abandoned. This paper will present literature studies about international well integrity standards and how well integrity manages the well life cycle. This paper is also providing recommendation to implement Well Integrity Management in Indonesia to ensure end to end well register.

Well Side-Track Optimization Using Electromagnetic and Ultrasonic Measurements Across Dual Strings for Well Integrity Assurance

2016 ◽  
Author(s):  
Dhari M. Al-Saadi ◽  
Yousef A. Yateem ◽  
Shaikhah S. Omani ◽  
Mohammad B. Al-Ajmi ◽  
Mohamed AlMahdy ◽  
...  
Keyword(s):  
Well Integrity ◽  
Ultrasonic Measurements ◽  
Side Track ◽  
Integrity Assurance

Repair of Rheumatic Tricuspid Valve Stenosis with Autologous Pericardium

2013 ◽  
Vol 16 (4) ◽  
pp. 187
Author(s):  
Ali Kemal Gür ◽  
Özgür Gürsu ◽  
Helin El ◽  
Esra Eker ◽  
Mustafa Etli
Keyword(s):  
Tricuspid Valve ◽  
Autologous Pericardium ◽  
Successful Method ◽  
Tricuspid Valve Stenosis

The aim of the present study was to describe a successful method for treating rheumatic tricuspid valve stenosis with autologous pericardium, commissurotomy, and a Kalangos ring without replacing the tricuspid valve.

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