Multi-Lateral Well Construction: A Multi-Benefit Drilling Technology

Winton, J.A.C.; Lodder, Robert Jan; Smit, A.L.

doi:10.2523/39353-ms

Cited by 5 publications

(3 citation statements)

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“…When an economic judgement on the viability of the project is made, it is easy to overlook factors that may contribute significantly to the financial results. 12 These factors include the reservoir characteristics and development plans, production capabilities, facility capabilities, current and future technology available, experience of the operator and the service company, and planning. Multilateral wells have a marked impact in all of these areas, and ignoring one or more areas could have a large effect on the overall financial success of the project.…”

Section: The Impact Of Multilateral Systemsmentioning

confidence: 99%

Intelligent Multilaterals: The Next Step in the Evolution of Well Construction

Oberkircher¹,

Cavender

Nielsen³

et al. 2002

All Days

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Section: The Impact Of Multilateral Systemsmentioning

confidence: 99%

Intelligent Multilaterals: The Next Step in the Evolution of Well Construction

Oberkircher¹,

Cavender

Nielsen³

et al. 2002

All Days

View full text Add to dashboard Cite

show abstract

“…When an economic judgement on the viability of the project is made, it is easy to overlook factors that may contribute significantly to the financial results. 6 These factors include:…”

Section: The Impact Of Multilateral Systemsmentioning

confidence: 99%

Multilateral Technology as a Creative Reservoir Development Strategy for New and Mature Fields Alike

Oberkircher¹

2002

Proceedings of SPE Asia Pacific Oil and Gas Conference and Exhibition

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“…The team's previous work in the field of Multilaterals is well documented in earlier SPE papers (1), (2) The team's previous work in the field of Multilaterals is well documented in earlier SPE papers (1), (2) …”

Section: Introductionmentioning

confidence: 96%

Optimised Slot Utilization with a Geosteered Multilateral Well

Lodder¹,

Jack²,

Doug³

et al. 1999

Proceedings of Offshore Europe Oil and Gas Exhibition and Conference

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractIn September 1998 Shell UK Exploration and Production, operating in the UK sector of the North Sea on behalf of Shell U.K. Limited and Esso Exploration and Production UK Limited, completed a fourth Multilateral well from the Tern Alpha platform situated in block 210/25a in the UK sector of the North Sea. This dual lateral well, TA-06, represents a major technical milestone in the process of constructing wells with both complex drainage architecture and highly specific reservoir targets from a slot valued platform. Moreover TA-06 also represents a major economic success in that the whole well was completed 7.5 days ahead of schedule with resultant savings in budgeted construction costs and the accelerated production of oil.The primary objectives of the TA-06 well were to improve overall recovery of reserves within the Rannoch B and the Upper Ness reservoirs of the Brent sequence, in areas not adequately exploited by existing producers. The two horizontal lateral legs are effectively infill producers with the mainbore designed to improve recovery from the Rannoch in the crestal area of the field and the lateral designed to drain the Upper Ness as part of the existing flood strategy. Both legs also fulfilled an appraisal role in that they were drilled updip to assess the areal limits of the respective formations.Due to tolerance constraints of target horizons, the requirement for real-time geosteering with 4 ¾" Gamma / Resistivity / Neutron Porosity and Density sensors was essential to ensure length of producing section was maximised. Due to the requirement to reduce mud weights through the reservoir and the use of 7.0" drilling liners to contain the formations above, both producing sections were drilled with 6.0" hole using 4 ¾" formation evaluation while drilling tools. The requirement for realtime Geosteering capability dictated the use of an advanced data acquisition system linked to a database in the operators office and enabled the office-based subsurface team to share information with and advise the rig site team with informed geosteering decisions.The expected recoverable reserves per objective combined with the value of slots on the Tern platform warranted the use of a dual lateral well. A pre-cut window joint was installed and cemented as part of the 9 5 / 8 " casing string to allow simple lateral exit without the requirement for milling operations. The mainbore was constructed with an 8 ½" section and 7.0" drilling liner followed by 6.0" hole with 4 ½" cemented liner through the Rannoch. The upper lateral was drilled from the pre-cut window with the same hole and liner sizes. The 7.0" lateral liner was tied back to the mainbore and a washover effected to remove the liner top and complete a class 4 multilateral junction with full 8 ½" mainbore and 6.0" lateral access. The lateral was completed 11.5 days ahead of schedule.This paper aims to show how a well co-ordinated and multifunctional team was used to effect the construction of the dual lateral well an...

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Multi-Lateral Well Construction: A Multi-Benefit Drilling Technology

Cited by 5 publications

References 0 publications

Intelligent Multilaterals: The Next Step in the Evolution of Well Construction

Intelligent Multilaterals: The Next Step in the Evolution of Well Construction

Multilateral Technology as a Creative Reservoir Development Strategy for New and Mature Fields Alike

Optimised Slot Utilization with a Geosteered Multilateral Well

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