Usklađivanje simulacijskog modela jezgre stijene i laboratorijskog testa neustaljenog protoka

master's thesis

• Title: Usklađivanje simulacijskog modela jezgre stijene i laboratorijskog testa neustaljenog protoka : diplomski rad
• Title (english): 3D core-flood simulation model for unsteady state relative permeability data tuning : master’s thesis
• Author: Filip Kos
• Mentor: Domagoj Vulin (mentor)
• Committee member: Domagoj Vulin (predsjednik povjerenstva)
• Committee member: Tomislav Kurevija (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: 2017-02-17, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering; Petroleum Mining

Abstract

Izrađen je simulacijski model jezgre stijene za numeričku simulaciju laboratorijskog eksperimenta specijalnih analiza jezgri stijena istiskivanja nafte s vodom. Model je izrađen kako bi se povezali podatci o relativnoj propusnosti i kapilarnom tlaku između laboratorijski kontroliranog protočnog uvjeta i simulacijskog modela. Eksperimentalni podatci interpretirani su analitičkim proračunom kako bi se utvrdilo podatke o relativnim propusnostima za naftu i vodu u odnosu na zasićenje fluidom. Simulacijski model jezgre stijene inicijaliziran je u skladu sa dimenzijama i geometrijom laboratorijskog uzorka, osnovnim svojstava stijena i fluida, te karakteristikama eksperimenta i eksperimentalnih rezultata. Testirane su različite postavke simulacijske mreže (dimenzije i broj ćelija) između kojih je ispitan simulacijski model kojemu su dimenzije ćelija od 1,5 do 2,5 mm i sastoji se od preko 15 tisuća ćelija. Modeliranjem laboratorijskog eksperimenta usklađeni su proizvodni rezultati prilagođavanjem krivulje relativnih propusnosti za naftu i vodu prema Corey-Brooks korelaciji. Svaka postavka simulacijske mreže ćelija zahtijevala je različite krivulje relativnih propusnosti da bi se uskladili rezultati. Krivulje relativnih propusnosti testirane simulacijskim modelom jezgre imaju veću pouzdanost za predviđanje procesa proizvodnje simulacijom na razini ležišta. Model služi za interpretaciju sirovih podataka iz laboratorijskih testova višefaznog protoka i kapilarnog tlaka, uz reproducibilnost mjerenih podataka simulacijom.

Abstract (english)

Abstract: a 3D core sample model for numerical simulation of unsteady state water-flood test performed in lab has been made. The water-oil fluid displacement model is developed and initialized with a purpose to show how the laboratory obtained relative permeability and capillary pressure data can be linked to a numerical model that can provide the same results as an actual physical system. Relative permeability data can then be tuned for a better match with lab data and therefore it can be representative for further reservoir modeling. Experimental laboratory was first analytically interpreted to determine the relative permeability versus saturation data for oil and water, following the initialization of the core model in accordance with the laboratory sample dimensions and geometry, physical and fluid properties, experimental characteristics and results. The model is history matched with production rates reported from laboratory, i.e. by adjusting the laboratory obtained relative permeability curves in accordance with Corey-Brooks correlation. Core-flood simulation results are compared to experimental results and shown in a chronological way according to 4 different types of tested grid blocks versus relative permeability data. Experimental data is successfully and accurately matched with every model, all of which required slightly different water and oil relative permeability curves in relation to one another. The results confirmed the thesis, demonstrated the sensitivity of the precise micromodel (one of which consists out of over 15 thousand grid block cells) and showed how it can be a valuable tool for observing important physics including heterogeneity on a small precise scale that could be translated on to a larger scale dimensions, that of a reservoir.

• Keywords: simulacijski model; specijalne analize jezgri stijena; numerička simulacija
• Keywords (english): simulation model; special core analysis; numerical simulation
• Language: croatian
• URN:NBN: urn:nbn:hr:169:294535
• 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: 2017-03-06 10:33:32