Definiranje jednadžbe stanja za utiskivanje CO2 u naftu

master's thesis

• Title: Definiranje jednadžbe stanja za utiskivanje CO2 u naftu : diplomski rad
• Title (english): Definition of equation of state for CO2 EOR process : master's thesis
• Author: Valentina Biličić
• Mentor: Domagoj Vulin (mentor)
• Committee member: Domagoj Vulin (predsjednik povjerenstva)
• Committee member: Vladislav Brkić (član povjerenstva)
• Committee member: Luka Perković (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: 2016-11-18, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering; Petroleum Mining

Abstract

Minimalni tlak miješanja ključni je parametar na temelju kojeg se planiraju uvjeti utiskivanja plinova kako bi se
postigao dodatni iscrpak nafte kojoj se smanjila pokretljivost tijekom proizvodnje ispod tlaka zasićenja.
Iz dostupnih laboratorijskih podataka o nafti, tj. laboratorijske studije utiskivanja nafte, uzeti su podaci za
usklađivanje s onima koji se mogu dobiti simulacijom PVT uvjeta, pomoću jednadžbe stanja. Kako je za
minimalni tlak miješanja u ležištu potrebno uzeti u obzir prostorne raspodjele zasićenja fluidima tijekom
utiskivanja, a jednadžba stanja opisuje samo svojstva fluida, sami minimalni tlak miješanja se odredio
korelacijom, a ostala svojstva (viskoznost, gustoća, faktor bubrenja) su određena pomoću podešene jednadžbe
stanja. Hipoteze navedene u uvodu su potvrđene, tj. da minimalni tlak miješanja (korelacija Cronquista je dala
izvrsno slaganje s laboratorijskim podacima) i volumetrijske promjene tijekom utiskivanja CO2 (modificirana
Peng-Robinsonova jednadžba stanja daje vrlo dobro poklapanje s podacima iz laboratorija) mogu biti određeni
korelacijom i numerički, samo korištenjem jednadžbe stanja.

Abstract (english)

Abstract: Minimum miscibility pressure is a key parameter for gas injection planning in order to achieve enhanced oil
recovery that became less mobile during the production below saturation pressure. From laboratory data on oil,
i.e., laboratory injection studies, the data were taken for matching with those that can be obtained by simulating
the same PVT conditions, by using the equation of state. As for minimum miscibility pressure in a reservoir
spatial distribution of fluids saturations during the injection is required, and the equation of state describes only
the properties of the fluids themselves, a minimum miscibility pressure was determined by empirical correlation,
and other properties (viscosity, density, swelling factor) were determined by using modified equation of state.
Hypothesis stated in the introduction have been confirmed, and that is that minimum miscibility pressure
(Coronquist's correlation gave excellent matching with data measured in a lab) and volumetric changes during the
CO2 injection into reservoir oil (in this work modified Peng-Robinson equation of state showed very good
matching) can be obtained by correlation and numerically i.e. only by equation of state.

• Keywords: PVT; jednadžba stanja; CO2; EOR; minimalni tlak miješanja; faktor bubrenja
• Keywords (english): PVT; equation of state; CO2; EOR; minimum miscibility pressure; swelling factor
• Language: croatian
• URN:NBN: urn:nbn:hr:169:288929
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2016-12-15 14:11:08