Hidraulički i mehanički integritet kanala bušotine

master's thesis

• Title: Hidraulički i mehanički integritet kanala bušotine : diplomski rad
• Title (english): Hydraulic and mechanical integrity of the well : master's thesis
• Author: Antonio Horaček
• Mentor: Borivoje Pašić (mentor)
• Committee member: Borivoje Pašić (predsjednik povjerenstva)
• Committee member: Nediljka Gaurina-Međimurec (član povjerenstva)
• Committee member: Zdenko Krištafor (član povjerenstva)
• Granter: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Petroleum and Gas Engineering and energy); Zagreb
• Defense date and country: 2021-02-12, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering; Petroleum Mining

Abstract

NORSOK D-010 standard definira integritet bušotine kao: ”Primjenu operativnih, tehničkih i
organizacijskih rješenja u svrhu smanjenja rizika od nekontroliranog ispuštanja ležišnog fluida
tijekom životnog vijeka kanala bušotine“. Primarna barijera (isplaka, cementni kamen, zaštitne
cijevi, dubinski sigurnosni ventil) predstavlja prvi stup obrane od nekontroliranog dotoka
ležišnog fluida, dok sekundarna barijera (cementni kamen, bušotinska glava, preventerski
sustav, erupcijski uređaj) čini vanjsku zaštitu ukoliko elementi primarne barijere ne obave
temeljnu zadaću. Sustav upravljanja integritetom bušotina kojeg čine stručno osoblje, oprema i
sustavni procesi predstavlja rješenje za definiranje obveza, zahtjeva i odgovornosti kompanija
u naftnoj i plinskoj industriji za upravljanje rizicima od gubitka bušotine tijekom životnog vijeka
bušotine. Shematski prikaz barijera pruža bolji uvid u stanje barijera i njihove uloge pri
djelovanju na nekontrolirani dotok fluida, dok metoda stabla kvarova omogućuje sustavnu
procjenu mogućih rizika koji mogu narušiti integritet i kontrolu nad kanalom bušotine.
Neadekvatna ugradnja, loša kvaliteta i neispitanost hidrauličkih i mehaničkih elemenata
barijera, te manjak znanja i loša komunikacija stručnog osoblja mogu dovesti do katastrofalnih
posljedica, kao što je bio gubitak integriteta bušotine na polju Macondo u Meksičkom zaljevu
2010. godine.

Abstract (english)

The NORSOK D-010 standard defines well integrity as: "Application of operational, technical and organizational solutions to reduce the risk of uncontrolled release of formations fluid throughout the life cycle of a well". The primary barrier (mud, cement, casing, downhole safety valve) is the first pillar of defense against uncontrolled inflow of reservoir fluid, while the secondary barrier (cement, wellhead, blowout preventer, “Christmas tree”) provides an external protection if the primary barrier elements do not perform the basic requirements. Well integrity management system, consisting of professional crew, equipment and systematic procedures, presents solution for defining the obligations, requirements and responsibilities of a company in the oil and gas industry to manage the risks of well loss during the life cycle of a well. Well barrier schematic provides a better visualization of barrier conditions and their role in an attempt to protect uncontrolled fluid inflow, while the fault tree method allows a systematic assessment of potential risks that may impair the integrity and control of the wellbore. Inadequate installation, poor quality and untested hydraulic and mechanical barriers, as well as lack of knowledge and poor communication of professional staff can lead to catastrophic events, like demonstrated in the Gulf of Mexico in 2010, with the “Deepwater Horizon” incident.

• Keywords: integritet bušotine; NORSOK D-010 standardi; primarna i sekundarna barijera; shematski prikaz barijera; procjena rizika; neuspjeh integriteta bušotine
• Keywords (english): well integrity; NORSOK D-010 standards; primary and secondary barriers; well barrier schematic; risk assessment; failure of well integrity
• Language: croatian
• URN:NBN: urn:nbn:hr:169:497738
• Study programme: Title: Petroleum engineering; specializations in: Petroleum engineering, Energy production and supply, Environmental protection in petroleum engineering; Course: Energy production and supply; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka naftnog rudarstva (magistar/magistra inženjer/inženjerka naftnog rudarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-02-19 12:25:09