Thls paper was selected for presentatlon by the OTC Program Commtltee following renew of lnformat~on contalned In an abstract subrnmed by the author(s) Contents of the paper as presented have not been renewed by the Mshore Technology Conference and are subject to correctton by the author@) The rnatenal, as presented, does not necessarlly reflect any posltlon of the Gfkhore Technology Conference or ~t s olllcers Elbchon~c reproduchon dlstrtbuhon or storage of any part of thls paper for cornmerclal purposes mthout the wnlten consent of the Gfkhore Technology Conference IS prohlblted Perrnlss~on to reproduce In prlnt 1s restricted to an abstract of not more than 3M) words, lllustrat~ons may not be copled The abstract must contaln conspicuous acknowledgment of when and by whom the paper was presented AbstractExtended reach wells can offer significant commercial advantages. Greater drainage coverage of a reservoir is achievable from fewer locations. Existing extended reach technology has been reviewed and summarised. Whilst most papers to date have been focused on drilling design and operations, this paper provides an overview on the drilling issues but also examines the completion issues as relevant for a gas production well. A well design for a lOkm well with a TVD of 3500m has been prepared taking account of both drilling and completion operations. The casing and drillstring designs were optimised to minimise torquefdrag and to ensure that drilling the well was feasible. Key issues in cementing were noted. The completion design included extensive analysis of likely coiled tubing operations to identify the required operating envelope for the coiled tubing. The feasibility of using coiled tubing conveyed perforating guns to perforate the well was the primary focus. A tapered coiled tubing string was selected using existing technology. The design of a suitable tubing string for production from such a well was also examined. Given that extended reach wells will be higher in cost than vertical wells, it was assumed that a large dameter well was necessary to justify the economics. A 7" and 5 4 " (or 7" and 5") tapered string was therefore designed to maximise well capacity. Tubing stress analyses were carried out and a number of possible configurations (using existing tubing designs) were identified. In this paper it is shown that such a well is feasible, identifies some of the completion issues and identifies possible areas for further improvements in technology.
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.