This paper presents how extensive pre-job planning and proper utilization of new technology led to actualizing the coring objective of a well safely including successful coring through the hydrogen sulphide (H 2 S) rich Habshan 1 and 2 formations in an onshore field of the Abu Dhabi Company For Onshore Oil Operations (ADCO) in the United Arab Emirates.Well AK1 is part of a wider field appraisal plan to be used for data gathering and building a conceptual field development plan. The challenges were multiple, not only from the planning and coring bottom hole assembly (BHA) design point of view, but also in terms of effective health, safety and environment management during execution posing environmental and technical challenges to the desired data gathering objective.The appraisal well AK1 well design required 12 conventional coring BHA runs over a 27days duration including coring with an 8 -1/2" coring BHA through a 12-1/4Љ hole section. With detailed forward planning, use of new extended coring technology, operational focus and health, safety & environment (HSE) consciousness at the forefront, 6 continuous cores in 15 rig days with a record total core length in excess of 1,300 ft was successfully cut with 100% recovery factor through Shilaif, Mauddud, Top Nahr Umr, Unit 22a, Unit 22, Habshan, Habshan 1, Habshan 2 and Dense below Habshan 2 formations with H 2 S contents way in excess of safe limits saving 12 days rig time and almost $1m USD of planned well cost in the process.This paper aims to share how this was recently achieved highlighting some of the challenges faced in terms of planning and sharing the experience gained from successful execution of well AK1, including coring through H 2 S bearing formations, with respect to optimized core acquisition and handling for the benefit of other operators in the region.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.