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master's thesis
Analiza testa porasta tlaka hidraulički frakturirane bušotine primjenom programa Saphir
diplomski rad
Zagreb: University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, 2021. urn:nbn:hr:169:517093
Valjak, Andrea
University of Zagreb
Faculty of Mining, Geology and Petroleum Engineering
Department of Petroleum and Gas Engineering and energy

Institutional repository: Faculty of Mining, Geology and Petroleum Engineering Repository, University of Zagreb

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Valjak, A. (2021). Analiza testa porasta tlaka hidraulički frakturirane bušotine primjenom programa Saphir : diplomski rad (Master's thesis). Zagreb: University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering. Retrieved from https://urn.nsk.hr/urn:nbn:hr:169:517093

Valjak, Andrea. "Analiza testa porasta tlaka hidraulički frakturirane bušotine primjenom programa Saphir : diplomski rad." Master's thesis, University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, 2021. https://urn.nsk.hr/urn:nbn:hr:169:517093

Valjak, Andrea. "Analiza testa porasta tlaka hidraulički frakturirane bušotine primjenom programa Saphir : diplomski rad." Master's thesis, University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, 2021. https://urn.nsk.hr/urn:nbn:hr:169:517093

Valjak, A. (2021). 'Analiza testa porasta tlaka hidraulički frakturirane bušotine primjenom programa Saphir : diplomski rad', Master's thesis, University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, accessed 17 February 2025, https://urn.nsk.hr/urn:nbn:hr:169:517093

Valjak A. Analiza testa porasta tlaka hidraulički frakturirane bušotine primjenom programa Saphir : diplomski rad [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering; 2021 [cited 2025 February 17] Available at: https://urn.nsk.hr/urn:nbn:hr:169:517093

A. Valjak, "Analiza testa porasta tlaka hidraulički frakturirane bušotine primjenom programa Saphir : diplomski rad", Master's thesis, University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:169:517093

Metadata
TitleAnaliza testa porasta tlaka hidraulički frakturirane bušotine primjenom programa Saphir : diplomski rad
Title (english)Pressure build-up test analysis of hydraulically fractured well using the Saphir software : master's thesis
AuthorAndrea Valjak
MentorSonja Koščak Kolin (mentor)
Committee memberSonja Koščak Kolin (predsjednik povjerenstva)
Committee memberVladislav Brkić (član povjerenstva)
Committee memberBorivoje Pašić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Mining, Geology and Petroleum Engineering
(Department of Petroleum and Gas Engineering and energy)
Zagreb
Defense date and country2021-09-10, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mining, Petroleum and Geology Engineering
Petroleum Mining
Abstract
U radu je obrađena analiza testa porasta tlaka hidraulički frakturirane bušotine na odabranom naftnom ležištu. U tu svrhu najprije je teoretski opisana analiza testa porasta vertikalne bušotine iz koje su razvijeni analogni modeli za analizu tlaka frakturiranih bušotina. Glavna svrha ovakvih testova jest određivanje ležišnih svojstava, kao što su propusnost stijene i skin faktor, odnosno poluduljina pukotine i njezina vodljivost. Za analizu se upotrebljavao program Saphir, te se na temelju deset različitih slučajeva istog testa porasta tlaka odabrana analiza u kojoj se model frakturirane bušotine i ležišnog fluida najbolje podudara s krivuljom mjerenog tlaka i s krivuljom njegove derivacije. S obzirom da se radi o bušotini koju se planira refrakturirati, jer je nakon duljeg perioda proizvodnje došlo do smanjenja pukotine, što se očitovalo u opadajućim proizvodnim karakteristikama, glavni cilj mjerenja porasta tlaka jest interpretirati njezinu stvarnu poluduljinu. Ovaj podatak jedan je od ključnih za dizajn postupka novog frakturiranja, kao i za postavljanje novog proizvodnog modela. Na temelju deset provedenih analiza slučajeva, zaključeno je da najtočniji rezultat poluduljine daje model frakturirane bušotine s višefaznim protokom, u iznosu od oko 13 metara.
Abstract (english)
The thesis studies the analysis of a pressure build-up test of the hydraulically fractured well at the selected oil reservoir. For this purpose, the analysis of the build-up test for a vertical well was first theoretically described and then the compliant models for the pressure analysis of fractured wells were developed. The main objective of these tests is to determine the reservoir properties, such as rock permeability and skin factor, but also fracture half-length and conductivity. The Saphir software was used for the analysis. Based on 10 different cases of the same pressure build-up test, the analysis in which the model of a fractured well and reservoir fluid best matches the measured pressure curve and the derivative curve was selected. There is a plan to refracture the well since a reduction in the fracture size was noticed after a long period of production. This reduction was reflected in the declining production characteristics, therefore the main goal of measuring the pressure build-up is to interpret its actual half-length. This is one of the key information necessary for the design of the new fracturing process and for setting up a new production model. Based on 10 conducted case analyses, it was concluded that the most accurate result for fracture half-length is provided by the fractured well model with the multiphase flow, and it is approximately 13 meters.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:169:517093
Study programmeTitle: Petroleum engineering; specializations in: Petroleum engineering, Energy production and supply, Environmental protection in petroleum engineering
Course: Petroleum engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka naftnog rudarstva (magistar/magistra inženjer/inženjerka naftnog rudarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2021-09-20 13:16:18