Rigless Installation of Safety Valves To Implement a Well-Integrity Campaignand Return Wells to Production (2007)

Rigless Installations of Safety Valves to Implement a Well-Integrity Campaign and Return Wells to Production Folorunso Afolabi; Folorunso Afolabi Shell Petroleum Development Co. Search for other works by this author on: This Site Google Scholar Rodger Lacy; Rodger Lacy Weatherford Intl. Search for other works by this author on: This Site Google Scholar Robert Asher; Robert Asher Weatherford Intl. Search for other works by this author on: This Site Google Scholar Bobby Butler Bobby Butler Weatherford Intl. Search for other works by this author on: This Site Google Scholar Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, The Woodlands, Texas, U.S.A., March 2007. Paper Number: SPE-106533-MS https://doi.org/10.2118/106533-MS Published: March 20 2007 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Afolabi, Folorunso, Lacy, Rodger, Asher, Robert, and Bobby Butler. "Rigless Installations of Safety Valves to Implement a Well-Integrity Campaign and Return Wells to Production." Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, The Woodlands, Texas, U.S.A., March 2007. doi: https://doi.org/10.2118/106533-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE/ICoTA Well Intervention Conference and Exhibition Search Advanced Search Abstract Protecting the environment and health of the people by ensuring the integrity of all wells is one of the must-obey policies in Shell Petroleum Development Company of Nigeria Limited (SPDC). SPDC has been the leading producer of crude oil in Nigeria for more than 50 years. SPDC produces from many brown fields. SPDC currently has an inventory of producing wells that have been shut in because of one form or another of wellbore integrity problems. In some cases, these wells were completed decades ago when HSE requirements were considerably less stringent than they are today and wells were completed without sub-surface or downhole safety valves.In 2003, a more stringent policy on non-integrity wells was introduced and led to an investigation of service providers for a more reliable rigless installation of safety valves or a more cost effective rig workover. However, most of the brown fields that encompass these wells are predominantly located in the Niger Delta both in the shallow waters offshore and in land locations including swamp areas. Many of the wells are located on small-unmanned production jackets which do not have the structural integrity to support even an electric line unit let alone a workover rig. In addition the current geopolitical situation in the Niger Delta is such that bringing in any heavy-duty equipment can be extremely difficult and highly uneconomical in most of these low producing wells.It was against this background that SPDC carried out a well integrity management campaign to examine the feasibility of some kind of economic intervention to bring these wells back onto production.In this paper the authors will examine in detail the prevailing situation, present details of the alternative solutions that were considered and describe a highly economic campaign that was put in place to rehabilitate some 40 wells and make available some 30,000 bopd of oil production, all without the use of major workover equipment. Keywords: Upstream Oil & Gas, SPDC, Completion Installation and Operations, Niger Delta, wlak, wellbore integrity, well-integrity campaign, pressure drop, mandrel, dome Subjects: Wellbore Design, Wellbore integrity, Completion Installation and Operations Copyright 2007, Society of Petroleum Engineers You can access this article if you purchase or spend a download.