Experimental Study of CO2- and Methane- Foam Using Carbonate Core Material at Reservoir Conditions

Aarra, Morten Gunnar; Ormehaug, Per Arne; Skauge, Arne; Masalmeh, Shehadeh K.

doi:10.2118/141614-ms

Cited by 35 publications

(51 citation statements)

References 8 publications

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“…CH 4 -, N 2and CO 2 -foams). Strong and stable foam systems with good tolerance to oil have been found with the AOS surfactant in different porous media, at various elevated conditions and also at high pressure and high temperature field conditions (Aarra et al, 1994(Aarra et al, , 2002(Aarra et al, , 2011Solbakken et al, 2012;Vikingstad et al, 2009). …”

Section: Discussionmentioning

confidence: 99%

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Supercritical CO2-Foam - The Importance of CO2 Density on Foams Performance

Solbakken¹,

Skauge²,

Aarra³

2013

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In CO 2 projects for enhanced oil recovery (EOR) a critical factor is possible early CO 2 breakthrough and consequently poor sweep efficiency. Injection of foam can block and divert CO 2 which may improve sweep efficiency.Large changes in physical properties of CO 2 with temperature and pressure might affect CO 2 -foam performance under various reservoir conditions. Recently, we have focused on understanding supercritical CO 2 -foam properties and this paper describes the importance of supercritical CO 2 density on CO 2 -foam performance in outcrop Berea sandstone core material.Foam flooding experiments were conducted in sandstone core material at different pressures from 30 to 280 bar and at temperatures of 50 and 90°C using an AOS C14/16 surfactant. Results showed high foam strengths at low CO 2 density. In fact, the strongest supercritical CO 2 -foam was generated at the lowest supercritical CO 2 density tested, quite comparable to foam strength obtained with gaseous CO 2 . Only reduced foam strengths were found with dense supercritical CO 2 (MRF 3-11).Foam generation was studied with both equilibrated and non-equilibrated fluids. Previously, we showed that CO 2 -foam stability and blocking ability were strongly reduced when mass transfer occured. In this study delay in foam strength build-up was observed with non-equilibrated fluids. In addition, visual observations of the foam texture indicated larger bubbles.Compared to N 2 -foams at similar conditions CO 2 -foams were weaker and showed coarser foam structure.Recently in Aarra et al., (2012), we focused on understanding CO 2 -foam properties below and above the critical point of CO 2 (P c ≈ 73.8 bar, T c ≈ 31.0°C). Strong CO 2 -foams were generated when CO 2 was in its gaseous state (30 bar, 50°C). Weaker foams were generated at supercritical conditions (120 and 280 bar, 50°C) using an alpha olefin sulfonate (AOS C14/16 ) surfactant. Lower density difference between CO 2 phase and water, and choice of surfactant were discussed in context to the

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Section: Discussionmentioning

confidence: 99%

“…In Aarra et al, (2011) CO 2foam flooding in outcrop limestone cores at 277 bar and 100°C indicated possible formation of emulsion with the reservoir oil yielding very high pressure gradients. Bernard et al, (1980) also report about possible emulsions that dramatically reduced CO 2 flow through both Berea sandstone and carbonate cores.…”

Section: Introductionmentioning

confidence: 99%

Supercritical CO2-Foam - The Importance of CO2 Density on Foams Performance

Solbakken¹,

Skauge²,

Aarra³

2013

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“…In all foam flooding experiments conducted in this thesis (Papers 1-3), anionic alpha-olefin sulfonate (AOS) surfactant was used. The choice of foamer was based on promising results from our earlier work, screening studies and field tests using AOS surfactants (Aarra et al, 1994(Aarra et al, , 1996(Aarra et al, , 1997(Aarra et al, , 1998(Aarra et al, , 2002(Aarra et al, , 2011Skauge et al, 2002;Svorstøl et al, 1997;Vikingstad et al, 2006Vikingstad et al, , 2009. Our positive experiences with AOS surfactants for nitrogen and methane foams under elevated pressure and temperature conditions should also make comparisons against CO 2 -foams (in this thesis) interesting.…”

Section: Choice Of Surfactant In This Thesismentioning

confidence: 90%

“…The foam project builds on previous experiences and foam studies at our research institution, Uni CIPR, including field experiences with the applications of foam in North Sea reservoirs, predominately the work of Aarra et al (1994Aarra et al ( , 1996Aarra et al ( , 1997Aarra et al ( , 1998Aarra et al ( , 2002Aarra et al ( , 2011, Skauge et al (2002) and Vikingstad et al (2006Vikingstad et al ( , 2009.…”

Section: Scope and Objectivesmentioning

confidence: 99%

Properties of N2- and CO2-foams as a function of pressure

Aarra

Skauge

Solbakken

et al. 2014

Journal of Petroleum Science and Engineering

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The last ~4.5 years have been the most exciting and challenging period in my life so far. I want to use this opportunity to thank at least some of the people who have supported me in one way or another during this period. I wish to express my gratitude to my supervisor Dr. Morten G. Aarra; thank you for sharing your knowledge with me, for your personal encouragement, and for the many good discussions. My co-supervisor, Professor Arne Skauge, deserves a special thank as well; thank you for scientific advice and assistance throughout the work, for giving me the opportunity to participate as a Master and PhD student at Uni CIPR, and for offering me a permanent position thereafter. Acknowledge goes to Hege Ommedal for her support as PhD-coordinator at the department of Chemistry. I am also thankful to other past and present colleagues at Uni CIPR who have made this time

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“…Separate measurement of foam stability was conducted for the best conditions as the results obtained from Figures 3 and 5 whereby at 1 wt% of brine, 0.5 wt% of AOS and 0.3 wt% of SNP, the most stable foams formed as shown in Figure 6. Aarra et al [45] found that the brine composition and ionic strength did not significantly affect the height of foam column. Thus, addition of 0.3 wt% of SNP has stabilized the foam system at the initial stage by coating the formation of thinning film, resulting in stronger foam by the oscillatory structural force based on mechanism proposed by [14].…”

Section: Effect Of Brine On Foam Stabilitymentioning

confidence: 97%

Aqueous foams stabilized with silica nanoparticle and alpha olefin sulfonates surfactant

Mohd¹,

Bakar²,

Awang³

et al. 2018

JMES

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Carbon dioxide (CO2) foams have been introduced to improve mobility of CO2 in CO2 flooding. However, using surfactant alone to stabilize CO2 foam has potential weaknesses such as high surfactant retention in porous media and the foam is thermodynamically unstable for a long-term. Nanoparticle has been an alternative in stabilizing CO2 foam longer. This study aims to analyze CO2 foam stability at varying concentrations of surfactant, silica nanoparticle (SNP) and brine. The additions of SNP in anionic surfactant of alpha olefin sulfonates (AOS)-water and in AOS-brine towards foam stability were demonstrated in this study. CO2 foam stability was measured through the foam height observation and bubble size analysis. The performance of SNP and AOS suspensions in stabilizing foam were observed at different concentrations of AOS (0.1, 0.3 and 0.5 wt%), SNP (0.1, 0.3 and 0.5 wt%) and brine (0.1, 1 and 5 wt%). The results revealed that the CO2 foams were most stable at 0.3 wt% SNP suspension in 0.5 wt% AOS-water. It was found that the most stable foams formed at concentration of 1 wt% of brine. Smaller and uniform bubble size has been produced at 0.3 wt% SNP in 0.5 wt% AOS solution. Thus, concentrations of surfactant, SNP and brine have significant effects on CO2 foam stability.

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Experimental Study of CO2- and Methane- Foam Using Carbonate Core Material at Reservoir Conditions

Cited by 35 publications

References 8 publications

Supercritical CO2-Foam - The Importance of CO2 Density on Foams Performance

Supercritical CO2-Foam - The Importance of CO2 Density on Foams Performance

Properties of N2- and CO2-foams as a function of pressure

Aqueous foams stabilized with silica nanoparticle and alpha olefin sulfonates surfactant

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