Magnus: Utilisation of Conductor Sharing Wellhead Technology to Access Additional Hydrocarbons via a Slot-Constrained Platform

Hicks, Simon Edward; Honey, Mark; Farmer, I R; Smart, Barry; Moore, Angela; Thow, Brian

doi:10.2118/124233-ms

Cited by 4 publications

References 19 publications

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Post-Plateau Reservoir Management in the Magnus Field

Moulds

Trussell

Erbas

et al. 2010

SPE Annual Technical Conference and Exhibition

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Magnus is a high productivity oil field in the northern North Sea. First oil was produced in 1983 and the plateau of 150 MSTB/D ended in 1995. In the post-plateau period a variety of reservoir management techniques have been employed to arrest decline rate. Two major projects have been executed post-plateau: in 2002 a gas injection EOR scheme was initiated and more recently additional drilling slots were added to the platform to increase reservoir access. These major projects have rejuvenated the field development options and will enable significant oil production beyond the next decade. The EOR scheme exemplifies the synergies that are important to continuing to extract value in a mature oil province. The gas that is injected is sourced from several other fields and provides an export route for associated gas that would otherwise be stranded. After seven years of operation the impact of the EOR scheme is readily quantified, as are the challenges inherent in operating such a scheme. This paper describes the reservoir performance of EOR, discusses observations that may impact gas relative permeability under WAG operation, describes the tools that have supported reservoir management decisions and considers the operational issues that continually challenge delivery and the surveillance approach taken to mitigate these. The extended slots project used slot-splitter technology to increase the number of wells. Wells from the new slots are now the longest wells that have been drilled from the platform enabling recovery from targets at the periphery of the field. The combination of EOR and additional slots has generated a position where the field is once again opportunity-rich. Together with technology developments in 4D seismic and revised geological description a new tranche of opportunities are being identified that combine initially dry oil attic targets along with the underpinning volumes from EOR delivery.

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Post-Plateau Reservoir Management in the Magnus Field

Moulds

Trussell

Erbas

et al. 2010

SPE Annual Technical Conference and Exhibition

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Integration and Assurance of Well Documents and Data – Essential Preparation for Tomorrow

Sawaryn¹,

Pirie²,

Green³

et al. 2013

SPE Offshore Europe Oil and Gas Conference and Exhibition

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During the last four years over 330,000 electronic drilling, completions and interventions documents have been consolidated in a new document management system, improving both their accessibility and future worth to the expanding user base. The system’s document structure builds on earlier, engineer-led experience and has contributed to the new company-wide standard for managing these documents. At the same time, the document management project has eliminated over 180,000 duplicate or obsolete documents. As part of the migration from the old system to the new one, common well names have been adopted to support integration activities both within the Wells function and also with the Subsurface and Operations communities. Directional surveys are key links between these communities and over the same period, an in-depth, field by field review of the company’s UK directional survey data has been conducted. This activity is now approximately 67% complete. Together, these activities are seen as essential preparations for the future and they have already helped streamline some activities in both asset acquisitions and disposals. These tasks have taken time, but measured preparation plus a degree of pragmatism have ensured they remain manageable. Care has been taken to maintain the document folder structure so it remains familiar to users, whilst taking advantage of the superior capabilities, such as search and assurance available in the new system. The paper contains an outline of the structure, metadata and a description of the project’s goals and history, including some of the challenges commonly encountered in preparing, processing and exporting and importing data. Details of the directional survey data verification process is also provided. This subject is of interest to many companies because of the scale of the exercise and the growing recognition in the industry of its technical and commercial importance.

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Integration and Assurance of Well Documents and Data—Essential Preparation for Tomorrow

Sawaryn¹,

Pirie²,

Green³

et al. 2013

SPE Economics &Amp; Management

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Summary During the last 4 years, more than 330,000 electronic drilling, completion, and intervention documents have been consolidated in a new document-management system, improving both their accessibility and future worth to the expanding base of users. The system's document structure builds on earlier, engineer-led experience and has contributed to the new companywide standard for managing these documents. At the same time, the document-management project has eliminated more than 180,000 duplicate or obsolete documents. As part of the migration from the old system to the new one, common well names have been adopted to support integration activities within the wells' functional organization and the subsurface and operations communities. Directional surveys are key links between these communities, and over the same period, an in-depth, field-by-field review of the company's UK directional-survey data has been conducted. This activity is now approximately 67% complete. Together, these activities are seen as essential preparations for the future, and they have already helped streamline some activities in both asset acquisitions and disposals. These tasks took time, but measured preparation plus a degree of pragmatism have ensured they remain manageable. Care has been taken to maintain the document folder structure so it remains familiar to users while also taking advantage of the superior capabilities, such as search and assurance, available in the new system. This paper contains an outline of the structure and metadata and a description of the project's goals and history, including some of the challenges commonly encountered in preparing, processing, and exporting and importing data. Details of the directional-survey data-verification process are also provided. This subject is of interest to many companies because of the scale of the exercise and the growing recognition in the industry of its technical and commercial importance.

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Magnus: Utilisation of Conductor Sharing Wellhead Technology to Access Additional Hydrocarbons via a Slot-Constrained Platform

Cited by 4 publications

References 19 publications

Post-Plateau Reservoir Management in the Magnus Field

Post-Plateau Reservoir Management in the Magnus Field

Integration and Assurance of Well Documents and Data – Essential Preparation for Tomorrow

Integration and Assurance of Well Documents and Data—Essential Preparation for Tomorrow

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