Monday, May 24
The well barrier concept is fundamental for the well integrity discipline. The different types of barriers (permanent and retrievable, opened and closed, primary and secondary, mechanical and hydraulic, dependent and independent) require proper validation. These barriers need to be thoroughly selected, installed and verified. They need to be properly monitored, maintained, and periodically tested during the well lifecycle.
From the verification side, can we consider a barrier if it is not 100% leak tight? What to do if the barrier can’t be tested in the direction of the flow? Should the barrier always be tested to the maximum pressure it might be exposed? How accurate are conventional logging tools for verification of barriers? Is there any difference in terms of barrier validation between static and dynamic well conditions?
This session will include following:
- Cement evaluation challenges using conventional acoustic logs and investigation new innovative way/tools to verify the cement as a primary barrier.
- Validation of the barrier envelope during installation and suspension.
- Re-verification of the barriers during production phase
Standards and best practices for well Integrity have been developed using the expertise of the industry, responding to previous accidents and experiences. Regulations have been implemented by governing bodies to ensure compliance with these standards and/or country/company specific requirements. Today the international standards provide guidelines and, in most cases, the governing body will provide the actual regulations.
In this session, we will consider the latest improvements to international standards and regulations in vigour in different countries. This include the Norsok D-010 standard for well integrity from a lifecycle perspective and the ISO 1630 standard for lifecycle governance and integrity in the operational phase. Other standards or best practices of relevance to this workshop will also be considered.
Experiences and proposed best practices to monitor, test, and verify the function of safety critical barriers will be presented. This should also include potential risk reducing measures that can be implemented to extend the lifecycle of wells, without compromising safety as required by the standards and/or regulations.
Well integrity is one of the major requirements that needs to be considered in early phases of construction and completion design planning. Both well construction and completion designs should ensure that the well integrity in all future well’s operations (drilling to abandonment) will not be compromised. During drilling and completion operations; the equipment selection, implemented practices, and risk measures taken need to consider their effect on well integrity. The cases should reflect the areas, but limited to the following:
- Does the well and completion design consider the full cycle of the well?
- Does the design match the implementation and reality?
- History cases for equipment utilisation and change in drilling practices that helped reduce well integrity issues.
- Are there extra expenditures that promote higher well integrity in CAPEX that can have major savings in OPEX?
Tuesday, May 25
Failure of integrity during the lifecycle of a well, accounts for a considerable amount of the operational cost, through various intervention trials to remediate such issues. This does not factor in direct impact in revenue, cash flow and reserves, potentially due to poor zonal isolation, which ultimately encourages reservoir crossflow, production downtimes, reservoir damage because of non-compatible crossflow fluids and potentially catastrophic environmental issues. Could it be a fault during the drilling and completion phase? Planning of well construction? Or consistent adjusting of the production portfolio, with remedial jobs, or choke adjustments? Or even tectonic movements, that impact the initial states of stress assumed?
Many times, the sectors previously mentioned are not totally coupled or aligned, the construction planning does not take into consideration the possible future activities during the well life, and simultaneously the operations team does not factor in some of the limitation from the early planning phase. As such, the risk of accurate well integrity could and should be a simple process, where the teams predict these issues, in order for early detection, diagnosis and potential action. In this scenario, the role of a good surveillance system is not only to create alarms, but also generate a reliable evaluation, either quality index or KPI´s, and still integrate various disciplines to ensure the ideal well for life and a smooth decommissioning.
Many producing wells around the globe develop undesirable and sometimes potentially dangerous sustained pressure on one or more casing strings of completed wells. Annular pressure can result from numerous sources, including tubing leaks, loss of zonal isolation within the cement column because of poor mud displacement and removal, free water-induced channels, stress fractures, and failure of the cement to cover all potential sources of annular pressure. In many wells, annular pressure is not observed and detected until the well is placed on production, making it difficult to identify, access, or remediate the pressure source.
Standard and innovative remediation techniques can extend the well life and the older wells can be restored back to production and injection.
This session will cover sustainable annular pressure diagnostic, assessment and remediation, along with:
- Possible causes of Sustainable Annular Pressure (SAP)
- Evidence used to identify the cause of the SAP
- How to maintain integrity before we remediate (mitigation and securing)
- When and how to remediate
- Success criteria for proper remediation
- Innovative remediation technologies and techniques
Establishing and managing wells Integrity at different stages of lifecycle is crucial. Lack of balanced well integrity management can lead to substantial increase of OPEX and CAPEX of the asset. The process most often requires qualified and experienced resources and not efficient practices to maintain its healthy performance.
In light of the global oilfield industry’s transformation and digitalisation, well integrity will continue to remain an area of focus and will benefit from digitalisation, real-time operations, artificial intelligence, automation, and data analytics.
The above not only will help increase efficiency but also use a proactive approach in revamping the well integrity from the construction of the well to the monitoring phase.
This session will shed light on new developments in the digital and how well integrity can benefit from it. The session will share the transformation and modernisation for future solutions and cases in well integrity management. The cases will reflect the following areas:
- How to digitalise the well construction phase to ensure downhole well integrity
- Well integrity risk management
- Data and well status visualisation and analysis
- Engineer and manager assistance by machines
- Consolidation all phases (drilling, completion, production, intervention and abandonment) into one platform
- Adoption and adaptation for organisational changes