The Intetech Well Integrity Toolkit (iWIT) is a web-based program which provides a comprehensive approach to well integrity management covering all potential integrity threats to the whole well. Using its own or existing client databases, this software carries out quantitative data analysis in real-time and provides feedback to the operator about the condition of individual wells and also overviews of the whole field integrity status to support timely, informed, decision-making.

Case histories are described of seven different operations introducing the software. The diverse reasons for introducing the software and the direct and indirect benefits ensuing are described. Each is a unique story, highlighting how flexible and comprehensive this successful software product has been. A common element is the management of data spread across multiple 3rd party datasystems which have been successfully integrated in each case, sometimes utilizing data entered in tablet PCs in the field directly linked to iWIT. More challenging is the vast range of data analysis and presentation which has been customized for each client to achieve their goal. This includes risk evaluation against complex criteria, determination of tubing condition based upon varying production conditions, calculating MAASP values per well per annulus, managing and generating well handover documentation from the software, tracking scaling issues, determining mean time to failure of equipment to establish risk-based inspection frequencies and many more detailed analyses,

The iWIT software has allowed these operators to prove their adherence to Well Integrity Management policies and provides numerous report formats including email alerts for engineers and managers. By ensuring well problems are proactively identified and responded to within guideline timeframes the software ensures that well integrity related shut-downs are reduced, thus providing improved productivity from the well stock and at the same time raising safety within the operations.

Key Benefits of the iWIT Software Identified from Case Histories

  1. Reduction in number of wells shut in for well integrity reasons by about 80% over two years resulting in higher productivity and major cost saving.

  2. Clear indication of wells' integrity status customised to meet company philosophy and local regulatory requirements.

  3. Maximising value of all data about the well by making it available to all users in the company.

  4. Integration of data from multiple sources by interfacing to existing 3rd party databases.

  5. Real-time evaluation of environmental conditions which could result in failure of tubing in wells with variable production conditions.

  6. Common system suitable for managing both brand-new field and mature field with aging wells.

  7. Continuously updated risk status of all wells as data updates are made in real time.

  8. Comprehensive scope capable of handling every type of data relevant to well integrity status; one-system covers all.

  9. Common standards systematically applied throughout the company raising confidence in decision-making.

  10. Reduction in data-gathering effort and report preparation by engineers, freeing them to carry out more detailed evaluation of workover options to resolve well issues; better utilization of skilled personnel.

Keywords:
real time system, flowline corrosion, pipeline corrosion, subsurface corrosion, information management, wellbore integrity, materials and corrosion, riser corrosion, annulus pressure, case history
Subjects:
Wellbore Design, Pipelines, Flowlines and Risers, Information Management and Systems, Wellbore integrity, Materials and corrosion, Well Integrity, Subsurface corrosion (tubing, casing, completion equipment, conductor)
Copyright 2012, Society of Petroleum Engineers
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