Well Integrity Management System (WIMS) Development
- Hamdi Daghmouni (ADCO Producing Co. Inc.) | Magdy El Manci (ADCO) | Sayed Aly Abdel Rady (ADCO) | Yousef Shattawah (ADCO)
- Document ID
- Society of Petroleum Engineers
- Abu Dhabi International Petroleum Exhibition and Conference, 1-4 November, Abu Dhabi, UAE
- Publication Date
- Document Type
- Conference Paper
- 2010. Society of Petroleum Engineers
- 4.2.3 Materials and Corrosion, 4.1.2 Separation and Treating, 6.1.1 HSSE Management Systems, 6.1 HSSE & Social Responsibility Management, 6.5.2 Water use, produced water discharge and disposal, 1.6 Drilling Operations, 4.1.5 Processing Equipment, 5.2 Reservoir Fluid Dynamics, 3 Production and Well Operations, 7.2.1 Risk, Uncertainty and Risk Assessment, 1.6.1 Drilling Operation Management, 6.1.2 HSSE Reporting, 7.1.8 Asset Integrity
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Operator's continuing success depends on the ability to manage its reservoirs and to exploit them in the most efficient manner to sustain production targets, while maintaining a high level of safety performance. Ensuring the integrity of wells is essential to achieve these requirements. Some of operated wells are reaching an age where an increasing frequency of integrity issues is becoming a concern. In addition, new wells may face greater threats to their integrity, for example due to the more corrosive reservoir fluids often encountered in existing and new developments. Wells operating under high annulus pressure are at risk of loss of pressure containment either in the form of releasing formation fluids to atmosphere or cross flow and charging up shallow reservoirs or aquifers. When monitoring trends of annulus pressures it should be taken into account that even with relatively low sustainable pressure there is a possibility that cross flow to shallow reservoirs could be taking place. This is especially true for C-C annulus "B?? of most oil and water injection wells where shallow water reservoirs are straddled by one casing. Any sustainable annulus pressure on this annulus is undesirable and is to be critically reviewed.
A well may also show annuli pressure due to thermal effect and this must always be checked for when a new well is being produced for the first time or when a well is brought into production after being shut in for a long period. It should be remembered that pressure increase due to thermal effect could be considerable.
One of the most key integrity challenges is the Sustained Annuli Pressure in A, B and C casings.
The asset-specific Well Integrity Management System must ensure that there is adequate isolation between the formations fluids (hydrocarbon-bearing reservoirs) and the surface environment at all times during well life. Responsibility for the well and its integrity is transferred between different parts of the organization during these activities, and this must be reflected in the integrity management system.
The development and implementation of Well Integrity Management System (WIMS) will assist effective management of wells and hence to contribute to the achievement of its business objectives.
The Well Integrity Management System (WIMS) shall provide direction regarding the manner in which wells are to be designed, constructed, operated, work-over up to abandonment. This is to assure the integrity during the well life cycle through monitoring, preventive, corrective practices and assurance system, which would reduce frequent work-over, operating down time, extend life cycle for wells, and secure asset integrity & safety and environment.
Benefits of Well Integrity
Safety - reducing the likelihood of hazardous events and due to integrity failures and / or unsafe practices
Environment - minimising releases to the environment, including contamination of sub-surface aquifers as well as releases to the surface
Production - maximising well availability and hence the production capacity of existing and future assets
Life-cycle cost minimisation - reducing costs over the whole life cycle by ensuring correct design, construction and operation, thus minimising costs of remedial work and equipment replacement.
Data availability - sustain and provide access to reliable well data to support the decision making process over the well life cycle
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