Homogenizacija podataka specijalnih analiza jezgara usklađivanjem s empirijskim korelacijama

master's thesis

• Title: Homogenizacija podataka specijalnih analiza jezgara usklađivanjem s empirijskim korelacijama : diplomski rad
• Title (english): Special core analysis data upscaling by matching with empirical correlations : master’s thesis
• Author: Tamara Biljanović
• 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: 2017-10-20, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering; Petroleum Mining

Abstract

U diplomskom radu testiran je postupak za određivanje reprezentativnih krivulja kapilarnog tlaka i relativne propusnosti na temelju eksperimentalnih podataka s tri polja, svakog zastupljenog s nekolicinom uzoraka. Pretpostavka jest da oni eksperimentalni podaci koji se slabo poklapaju s općim korelacijama i nakon podešavanja njihovih parametara mogu biti eliminirani iz razmatranja. Pokazalo se kako nesustavno mjereni podaci pokazuju i velika odstupanja od korelacija. Podaci kapilarnih tlakova Polja-3 su najsustavnije, tj. najpreciznije mjereni i poklapanje korelacija s tim podacima je najbolje. Relativna propusnost je mjerena metodom ustaljenog i neustaljenog protoka na istom polju, a poteškoće prilikom eksperimentalnog određivanja su se potvrdile i na lošem poklapanju s korelacijama. Usporedbom krajnjih točaka iz korelacije i eksperimenta, izdvojilo se prilično točno kritično zasićenje vodom, što je ključni parametar za poklapanje proračuna zavodnjavanja s povijesti proizvodnje u tom periodu. Korelacija sama za sebe, kao i eksperiment sam za sebe, daju manje kvalitetne podatke nego na ovaj način usklađeni podaci. Bilo je dovoljno tri analize kapilarnog tlaka na uzorcima s istog polja da se postigne izvrsno poklapanje s korelacijom, pa se može zaključiti kako bi bilo potrebno barem isto toliko mjerenja relativne propusnosti i da bi se tada uskladili te homogenizirali podaci specijalnih analiza jezgara potrebni za simulaciju ležišta ili navedene analitičke proračune.

Abstract (english)

In this paper, the procedure for determining the representative capillary pressure and relative permeability curves has been tested, based on experimental data from three oil-fields and several samples from each field. The assumption was that experimental data, which show bad matching with general correlations, and after the regression of correlation parameters, can be excluded from further considerations. It was shown that nonsystematically measured data shows great discrepancies from those calculated by correlations. At Field-3, the data were measured in the most systematic way and correlations for capillary pressure were matched most succesfully. Relative permeability was measured by unsteady state and steady state method on samples from the same field, with known technical problems that can be detected by bad matching with correlated values. End-points calculated by correlation and those determined experimentally indicate that critical water saturation can be predicted by correlation, which is crucial for waterflood predictions and their matching with historical data from that production period. Correlations and experimental studies for themselves provide data of lesser quality than when they are mutually synchronized. Three analyses of capillary pressure were sufficient to achieve a satisfying match with correlations, from which it can be concluded that at least three relative permeability measurements are required to match and upscale special core analysis data required for further reservoir simulations or analytical predictions.

• Keywords: reprezentativnost uzorka; specijalne analize jezgara; homogenizacija podataka
• Keywords (english): representative samples; special core analysis; data upscaling
• Language: croatian
• URN:NBN: urn:nbn:hr:169:159671
• 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: 2018-05-10 09:47:01