A drilling and completions applications portfolio and its associated support services requires constant attention if the portfolio is to remain up to date in both engineering and IT terms and continue to serve the needs of the drilling and completions engineering community. Over time, this management effort has become more involved and complex as the number of available applications has increased and the technologies have changed. The trend towards tighter integration and data sharing between drilling and completions applications and with other disciplines applications such as subsurface, places data management at the heart of the response. For large organisations in particular, keeping up with the new releases and patches can be a challenge and the need for backwards compatibility is paramount. Data issues and the poor connectivity associated with physical remoteness and some non-rig based units can also impede the change out to other systems. Special attention is required for applications that are designated safety critical or safety related.

The paper describes the way in which a major operator has defined and managed its drilling and completion portfolio over the last 20 years, to address the internal and industry changes and trends. The portfolio now serves the needs of over 2000 drilling and completions engineers worldwide. A wide range of examples, including the operator's WellAdvisor system, engineering toolkit and wells / subsurface integration project are presented, together with an evaluation of the portfolio management challenges and successes that have been achieved.

It is concluded that integration requires the consistent application of strong data management principles and a commitment to an underlying architecture to support simplification, reducing the number and complexity of the interfaces that must be managed. However, some flexibility is needed to promote the development of and access to new applications and the concept of niche applications has been introduced to address technical specialist's needs. Some applications which are either company specific, or are needed only in special circumstances do not lend themselves to being commercial products and these tools are provided by custom built, web-based applications. The recent focus on real time data, quality of service and digital security are merely the latest changes that have had to be accommodated.

Despite the apparent rate with which technical and commercial changes are occurring, the paper content illustrates the need to consider the portfolio management issues over long cycle times. The paper will be of interest to both business and IT managers and engineers tasked with managing drilling, completions and subsurface applications portfolios.

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