Using TAML-3 Multilateral Technology to Deliver a Technologically Challenging, Fast-Track, One-Well Development in the Southern North Sea

Abstract

Abstract As part of its exploration and development strategy of selectively developing resources in existing basins, BP has chosen to develop its Hoton field in the southern North Sea using a "normally unattended" satellite platform tied back to the West Sole pipeline system. To optimize volumes and drive efficiencies, BP has applied novel technologies, including multilateral completions, to the Hoton development. This paper describes how the Baker Oil Tools HOOK Hanger multilateral completion system evolved during the recompletion of Hoton well 48/7 b-12 to provide a fit-for-purpose solution for the application. The paper also describes some of the many "firsts" achieved during the re-completion of well 48/7b-12 and describes how the well was successfully completed in a timely and efficient manner. The Hoton field, operated by BP, lies 8 miles northeast of the West Sole field in North Sea blocks 48/6 and 48/7b. The field is composed of a tilted fault block structure with 918.6 ft relief on top of the Rotliegend formation, and bound on its southern, western and eastern flanks by faults. The southern bounding fault separates the Hoton Main area from a separate structure called Hoton SE. Hoton well 48/7b-12 was drilled in 1996 as an appraisal / development well for the field, but lower than expected gas production rates resulted in the development being put on hold until technology had matured to a level that would better exploit the prospect. In 2000, careful appraisal of the Hoton prospect concluded that re-entering well 48/7b-12 and delivering a tri-lateral well would provide an economically feasible completion option. This conclusion assumed a one-well development tied to a monopod, minimal facility Normally Unmanned Installation (NUI): in summary, a technologically challenging, fast track-development. In 2001, the Hoton 48/7b-12 well was developed as a Technical Advancement of Multilaterals (TAML) Level 3 well using the Baker Oil Tools HOOK Hanger system.