This article describes the well design approach for the offshore field White Tiger. As this field has a multi-reservoir structure and there is a number of infrastructure limitations related to the maximum number of well slots on a platform, the directional drilling technology has acquired a big spread. Currently, the main field parts have been developed and the field margins are being drilled. This leads to a more complicated well design and extending wells reach. In addition, the well trajectory is chosen so that the well meets the objectives of both additionally appraising the ‘risky reserves’ and penetrating the ‘proven reserves’ of a multilayered reservoir structure. The main well design maturation steps are geological justification, choosing the optimal well trajectory and casing scheme with regards to geological targets. The real time operation and geological monitoring are also considered. From the well construction point of view, the new technologies have been described that were successfully applied and contributed to skills broadening in ERD well design and drilling. The focus has been put as well on drilling fluids technology, selecting appropriate drilling rig and drill string. Should there be more complex wells planned with further outstep, the acquired skills will help in delivering these wells.
References
1. Lubnin A.A., Afanasiev I.S., Yudin E.V., System approach to planning the development of multilayer offshore field (In Russ.), SPE 176690-MS, 2015, https://doi.org/10.2118/176690-MS.
2. Lubnin A.A., Yudin E.V., Sansiev G.B., Methods to improve the efficiency of development of a multi-layer offshore gas condensate field: Thien Ung case study (In Russ.). SPE 187865-MS, 2017, https://doi.org/10.2118/187865-MS.
3. Nguyen Du Hung, Hung Van Le, Hydrocarbon geology of Cuu Long Basin – offshore Vietnam, Proceedings of AAPG International Conference, Barcelona, Spain, September 21-24, 2003.
4. Negrao A., Technology focus: Multilateral/Extended reach, SPE 0514-0130-JPT, 2014, https://doi.org/10.2118/0514-0130-JPT.
5. Netichuk I., Suvorov A., Galimov A., Special features of casing running and cementing in ERD wells, SPE 181947-RU, 2016, https://doi.org/10.2118/181947-RU
