Brine Crude Oil Interactions at the Oil-Water Interface

Chakravarty, Krishna Hara; Fosbøl, Philip Loldrup; Thomsen, Kaj

doi:10.2118/173765-ms

Cited by 15 publications

(11 citation statements)

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“…Various mechanisms including the formation and migration of fine particles are suggested to explain these experimental observations. Precipitation of anhydrite generates fine particles that may increase the production of oil ,, or damage the porous medium . Mathematical modeling of the fine migration phenomenon is outside the scope of this paper.…”

Section: Dissolution and Precipitationmentioning

confidence: 99%

“…The mechanism by which oil is mobilized in the presence of brine with a modified ionic composition is not yet understood . Migration of fine particles, , rock dissolution, and surface charge modifications due to ion exchange and surface complexation reactions − are among the possible mechanisms. Each one of these mechanisms, although still under investigation, is relatively well-known.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Analysis of Chalk–Brine–Oil Interactions

et al. 2017

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The surface complexation models (SCM) are used successfully for describing the thermodynamic equilibrium between the pure calcite surface (carbonate and calcium sites) and brine solutions. In this work, we show that the model parameters that are reported for the calcite-1 Please cite as "Eftekhari AA, Thomsen K, Stenby EH, Nick HM. Thermodynamic analysis of chalk-brineoil interactions. Energy & Fuels.

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Section: Dissolution and Precipitationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of Chalk–Brine–Oil Interactions

et al. 2017

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“…Additionally, the retention of these polar compounds onto sandstone rock increased with the increasing total concentration of divalent cations onto clay surfaces. This study concluded that the incremental oil recoveries recorded during Low Salinity Water Injection (LSWI) experiments decreased when the microdispersions were removed from the oil • Chakravarty, Fosbøl & Thomsen (2015).…”

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confidence: 99%

Effect of ionic composition in water: oil interactions in adjusted brine chemistry waterflooding: preliminary results

Maya¹,

Herrera²,

Orrego³

et al. 2018

Rev. fuentes reventón enrg.

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Low salinity or adjusted brine composition waterflooding (LSW or ABCW) is considered a promising improved/enhanced oil recovery (IOR/EOR) method. Despite the large number of studies documented in the literature, there are contradictory results and a lack of consensus regarding the mechanisms that operate in this recovery process. The proposed fluid:rock and fluid:fluid mechanisms are still under discussion and investigation. However, the impact of oil geochemistry and its importance on the fluid:fluid interactions that can occur with brines during LSW or ABCW have been overlooked and studied in a lesser extent.The scope of the present study is to preliminary evaluate crude oil:brine interactions to validate the influence of its compositions. These interactions were evaluated at static conditions for a week and reservoir temperature (60°C) using two oil samples from different Colombian basins and brine solutions of different composition at a constant ionic strength (I = 0.086). Specifically, this investigation evaluated the effect of the type of cation (Na+ and Ca2+) and anion (Cl- and SO4=) on crude oil:brine interactions. The results of these experiments were compared with tests using distilled water (DW). Although a basic characterization of brines (i.e. pH, alkalinity and ionic composition) and oil (oil viscosity) was performed, the main objective of this study is the analysis of water-soluble organic compounds (WSOC) using Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS). The results demonstrate that water:oil interactions are dependent on brine and crude oil compositions. The main changes observed in the aqueous phase were the increase in inorganic components (desalting effects) and organic compounds soluble in water. Only the system crude oil A and NaCl (5,000 ppm) showed the formation of a micro dispersion. Negative electrospray ionization (ESI (-)) FT-ICR MS data shows that WSOC’s identified in DW and Na2SO4 after the interaction with crude oil A belongs to similar classes but there is marked selectivity of species solubilized with different brines. The relative abundance of classes Ox, OxS and NOx (x > 2) decreases while Ox, OxS and NOx (x ≤ 2) increase their solubility in the presence of Na2SO4 compared to DW. The analysis of O2 and O3S classes using double bond equivalence (DBE) vs. carbon number (CN) contour plots shows that the isoabundance of water-soluble species are within the range of DBE £ 10 and CN £ 20 regardless the brine used in the experiments. Finally, the method of solvent extraction in silica columns used in this investigation for the analysis of WSOC using FT-ICR MS represents a powerful and new approach to study LSW and ABCW.

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“…The spontaneous emulsification of oil and water has been related to (Abou-Kassem & Farouq Ali, 1986;Bennion, D. B., Bennion, D. W., Thomas, F. B., & Bietz, R. F., 1998;Chakravarty, Fosbøl & Thomsen, 2015;Cuthiell, D., Green, K., Chow, R., Kissel, G., & McCarthy, C., 1995;Kokal, 2005;Moradi, Alvarado & Huzurbazar, 2011;Pietrangeli, Quintero, Jones & Darugar, 2014;Rezaei and Firoozabadi, 2014;Sjöblom et al, 2003;Sun, Mogensen, Bennetzen & Firoozabadi, 2016;Wang and Alvarado, 2012):…”

Section: Summary Discussionmentioning

confidence: 99%

Historical and recent observations in polymer floods: An update review

Manrique¹,

Ahmadi²,

Samani³

2017

CT&F Cienc. Tecnol. Futuro

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Polymer flooding has been the most widely used chemical enhanced oil recovery (EOR) method. The experience gained over the past decades from laboratory studies to project design and field implementation has been well documented in the literature. The main objectives of this paper are to evaluate recent observations of polymer floods that report injection rates leading to pressure values above the formation fracture pressure (FFP), high polymer production, formation of tight emulsions and/or productivity losses.Based on this review, it can be concluded that no direct evidence exists to support that injecting polymer above the FFP will lead to more polymer production. However, uncertainties associated with the estimation of fracture propagation/dimensions using pressure Fall-Off Tests (FOT) still remain. High polymer production, other than severe channeling, is generally reported in large scale/commercial projects. The impact of oil geochemistry/ composition and water salinity on oil-water-polymer emulsions is commonly overlooked in polymer flood studies. The formation of in-situ emulsions can also explain the injectivity and/or productivity reduction and well test interpretation (i.e. FOT) reported in polymer floods. It was also identified that the OPEX (Operational Expenditures) associated with oil-water separation in the presence of polymer and productivity losses (i.e. workovers, stimulation costs) are generally underestimated. Finally, this review is expected to contribute with the planning, design and implementation of future polymer flood pilots and field expansions. OBSERVACIONES HISTÓRICAS Y RECIENTES EN INYECCIÓN DEPOLÍMEROS: REVISIÓN ACTUALIZADA. OBSERVAÇÕES HISTÓRICAS E RECENTES DE INJEÇÃO DE POLÍMEROS:REVISÃO ACTUALIZADA. EDUARDO MANRIQUE et. al. 18 L a inyección de polímeros es el método químico de recobro mejorado con mayor número de implementaciones a escala de campo. La experiencia adquirida en las últimas décadas desde estudios de laboratorio hasta el diseño e implementación de campo ha sido bien documentada en la literatura. El objetivo principal de este trabajo es evaluar observaciones recientes de proyectos de inyección de polímero reportando tasas de inyección por encima de la presión de fractura de la formación, alta producción de polímero, formación de emulsiones viscosas y/o pérdidas de productividad.Basados en esta revisión, se puede concluir de que no existen evidencias directas de que la inyección de polímero a tasas que impliquen superar la presión de fractura induzcan a una mayor producción de polímeros. Sin embargo, existen incertidumbres relacionadas con la estimación de las dimensiones y propagación de fracturas utilizando pruebas de caídas de presión (FOT). La alta producción de polímero, por razones diferentes a canalizaciones severas, generalmente se reportan en proyectos a escala comercial. Por otra parte, el impacto de la composición y geoquímica del crudo y de la salinidad del agua en la formación de emulsiones agua:petróleo:polímero ha sido subestimado en estudios de in...

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Brine Crude Oil Interactions at the Oil-Water Interface

Cited by 15 publications

References 0 publications

Thermodynamic Analysis of Chalk–Brine–Oil Interactions

Thermodynamic Analysis of Chalk–Brine–Oil Interactions

Effect of ionic composition in water: oil interactions in adjusted brine chemistry waterflooding: preliminary results

Historical and recent observations in polymer floods: An update review

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