Casing and cementing with potential gas influx
Abstract
It is well known that wells should be reinforced by running the casing and cementing the annulus to create a competent cement sheath that helps to prevent the caving of the bore-hole. Other than supporting the casing, cementing the annulus also provides zonal isolation. The presence and migration of gas into the well annulus have been known as a problem in hydrocarbon exploration when complete isolation has not been achieved. This report presents the general concept of gas migration in the well annulus and introduces some practical examples from experience of running casing and cementing in production and exploration wells in abnormally high pressure formations with substantial risks of gas migration in Vietsovpetro’s fields.
References
Отчёты о научно-исследовательных работах: “Совершенствование и внедрение новых технологий строительства, капитальных и текущих ремонтов скважин”. Этап IV.1.3 - Анализ существующих и внедрение новых технологий крепления и заканчивания скважин на месторождениях СП «Вьетсовпетро», НИПИморнефтегаз, г. Вунтау. 01.2012 г.
Басарыгин Ю.М., Булатов А.И., Проселков Ю.М. Газопроявления при креплении скважин. Глава 4.2, Осложнения и аварии при бурении нефтяных и газовых скважин. М, Недра. 2000: стр. 279 - 324.
Nguyễn Hữu Chinh. Hiện tượng khí xuất hiện, xâm nhập và dịch chuyển trong vành xuyến các giếng khoan dầu khí. Tuyển tập báo cáo Hội nghị Khoa học Kỹ thuật Mỏ toàn quốc lần thứ 23. Nhà xuất bản Công Thương. 2012: trang 419 - 426.
Nguyễn Hữu Chinh. Những vấn đề về sử dụng xi măng bơm trám trong gia cố và kết thúc các giếng khoan dầu khí. Tuyển tập báo cáo Hội nghị Khoa học - Công nghệ quốc tế “Dầu khí Việt Nam 2010: Tăng tốc và phát triển”. Nhà xuất bản Khoa học và Kỹ thuật. 2010; 1: trang 837 - 848.
Erik B.Nelson, Dominique Guillot. Well cementing (second edition). Chapter 9: “Annular formation fluid migration”. 2007: p. 289 - 317.
Dale Dusterhoft, Scott Leatherdale, Jim Roth. The development of a new generation of gas control cements. Presented at the CADE/CAODC Drilling Conference, Calgary, Alberta Canada. 7 - 8 April, 1999: p. 99 - 123.
Deepwater Horizon - Accident Investigation Report. 8 September, 2010: 192p.
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