Effect of clay presence and solvent dose on hybrid solvent­-steam performance

Coelho, Raphael; Ovalles, César; Benson, Ian Phillip; Hasçakir, Berna

doi:10.1016/j.petrol.2016.12.006

Cited by 25 publications

(6 citation statements)

References 21 publications

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“…It is worth mentioning that the pyrolysis process started at around 400 °C, and no pyrolysis products are observed at lower temperatures. As a result, during pyrolysis the volatile content of the asphaltenes/coke residue is released, and the remaining aromatic sheets are further condensed, similar to that reported in the literature . Furthermore, the evolution of carbon oxides during the TPP of the coked-NiO nanoparticles may reflect the interplay between the reducibility and oxygen mobility of the NiO crystalline structure …”

Section: Resultssupporting

confidence: 75%

“…As a result, during pyrolysis the volatile content of the asphaltenes/coke residue is released, and the remaining aromatic sheets are further condensed, similar to that reported in the literature. 41 Furthermore, the evolution of carbon oxides during the TPP of the coked-NiO nanoparticles may reflect the interplay between the reducibility and oxygen mobility of the NiO crystalline structure. 40 Following the TPP test, the obtained coked samples were subjected to the TPO analysis designated as the post-TPP TPO test.…”

Section: Energy and Fuelsmentioning

confidence: 99%

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Pyrolysis and Oxidation of Asphaltene-Born Coke-like Residue Formed onto in Situ Prepared NiO Nanoparticles toward Advanced in Situ Combustion Enhanced Oil Recovery Processes

Biyouki

Hosseinpour²,

Nassar

2018

Energy Fuels

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Pyrolysis and oxidation of asphaltene-born coke-like residue formed onto ex situ and in situ prepared NiO nanoparticles as initial steps toward developing advanced in situ combustion enhanced oil recovery (EOR) processes were studied. The in situ synthesized NiO nanoparticles in heavy oil matrix, containing coke-like residue, were characterized by X-ray diffraction, Brunauer−Emmett−Teller, field-emission scanning electron microscopy, and energy-dispersive X-ray mapping techniques. The pyrolysis and postpyrolysis oxidation of the coke residue were investigated by temperature-programmed pyrolysis (TPP) and temperature-programmed oxidation (TPO) methods, respectively. Oxidation kinetics of the coke residue was described by the Kissinger−Akahira−Sunose isoconversional method. The results showed a higher percentage of coke residue on the in situ prepared nanoparticles than the ex situ employed ones. Eventually, during the TPP of the coke residue, the amount of carbon oxides released per total amount of the coke is 18.6% higher for the in situ NiO as compared to the ex situ NiO nanoparticles. This may be attributed to the uniform dispersion of the in situ NiO in the coke residue. Furthermore, compared to the ex situ NiO, the in situ NiO nanoparticles shift the oxidation temperature of the coke residue by about 100 °C to lower temperature. Multistep kinetics was predicted with a significant drop of the activation energy of the oxidation of the coke residue in the presence of in situ and ex situ NiO nanoparticles, confirming their catalytic effect. However, the preexponential factor, as a representation of the collision efficiency, is significantly higher over the in situ NiO compared to the ex situ NiO, leading to the enhanced oxidation of the coke residue. This may be attributed to the loss of surface area due to particle aggregation for the case of ex situ preparation, as well as the orientation of asphaltene molecules during the adsorption onto the surface. The asphaltenes could be aligned mostly vertically over the in situ NiO surface; thus the vertical alignment provides good channels for diffusion of gas-phase oxygen onto the surface leading to high collision efficiency and catalytic activity.

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Section: Resultssupporting

confidence: 75%

Section: Energy and Fuelsmentioning

confidence: 99%

Pyrolysis and Oxidation of Asphaltene-Born Coke-like Residue Formed onto in Situ Prepared NiO Nanoparticles toward Advanced in Situ Combustion Enhanced Oil Recovery Processes

Biyouki

Hosseinpour²,

Nassar

2018

Energy Fuels

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“…Hence, water flooding is more suitable for light or less viscous oil flooding than for heavy oil. In order to recover more heavy oil after conventional water flooding, different enhanced oil recovery (EOR) techniques including thermal oil recovery techniques and nonthermal techniques have been investigated [6][7][8][9][10][11]. The EOR processes focus on the reduction of oil viscosity or improvement of injection water viscosity, which can improve the mobility ratio of injection water and crude oil and enlarge sweep efficiency.…”

Section: Introductionmentioning

confidence: 99%

Insights into Enhanced Oil Recovery by Polymer-Viscosity Reducing Surfactant Combination Flooding in Conventional Heavy Oil Reservoir

Chen

et al. 2021

Geofluids

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Polymer flooding has a significant potential to enhance oil recovery in a light oil reservoir. However, for polymer flooding in a conventional heavy oil reservoir, due to unfavorable mobility ratio between water and oil, the improvement of sweep efficiency is limited, resulting in a low incremental oil recovery and failure to achieve high-efficiency development for polymer flooding in a conventional heavy oil reservoir. Inspired by the EOR mechanisms of the surfactant-polymer (SP) flooding process, the polymer-viscosity reducing surfactant flooding (P-VRSF) system was proposed to enhance conventional heavy oil recovery. Thus, to gain an insight into enhancing oil recovery by P-VRSF in a conventional heavy oil reservoir, the viscosity property, oil-water interfacial tension property, and oil viscosity reduction property were investigated. A series of parallel sand pack experiments were conducted to investigate enhanced oil recovery ability of polymer flooding and P-VRSF in a heterogeneous reservoir. Then, the 2D micromodel flooding experiments were conducted to investigate the EOR mechanism from porous media to pore level. Results demonstrated that polymer could increase the viscosity of injection water and improve the sweep efficiency. The emulsifying stability of surfactant with ultralow IFT (10-3 mN/m) was worse than that of the surfactant with higher IFT (10-2 mN/m). The viscosity reduction rate of the surfactant with higher IFT was higher than 80% at different oil-water volume ratios. The incremental oi recovery of P-VRSF was higher than that of polymer flooding. Moreover, the polymer-viscosity reducing surfactant with higher IFT could have higher incremental oil recovery. The 2D micromodel flooding results showed that the swept area of polymer flooding and P-VRSF was larger than that of water flooding. Moreover, the swept area of the surfactant with good emulsifying stability was larger than that of the surfactant with ultralow IFT. These findings could provide insights into enhancing oil recovery by P-VRSF in the conventional heavy oil reservoir.

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“…1 , 11 However, for the heavy oil reservoirs, not only reservoir rocks but also asphaltenes are charged because of interactions of asphaltenes with reservoir rock. 24 , 30 , 31 Thus, in heavy oil reservoirs, the reservoir rock particles may physically be attached to asphaltene clusters and make the asphaltene surfaces charged. 20 , 32 Although this interaction is physical and not chemical, since this interaction is in micro- and nanoscales, it is irreversible.…”

Section: Introductionmentioning

confidence: 99%

Intermolecular Interaction between Heavy Crude Oils and Surfactants during Surfactant-Steam Flooding Process

2020

Self Cite

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The objective of this study is to investigate the intermolecular interactions between the surfactants and the fractions of heavy crude oils. Two possible interactions were considered; polar and ionic interactions for two heavy crude oil–surfactant systems, and 20 surfactant-steam flooding tests were conducted on these crudes by testing nine surfactants (three anionic, three cationic, and three nonionic) with different tail lengths and charged head groups. The performance differences observed in each core flood were discussed through the additional analyses. To explain polar interactions, the pseudo blends of crude oil fractions (fractionation of saturates, aromatics, resins, and asphaltenes) were exposed to the surfactant solutions under vapor and liquid water conditions and their mutual interactions were visualized under an optical microscope. To explain ionic interactions, the charges on asphaltene surfaces were analyzed by zeta potential measurements before and after core flood tests on both the produced and the residual oil asphaltenes. The addition of surfactants improved the oil recovery when compared to steam injection alone. However, different oil recoveries were obtained with different surfactants. Further analyses showed that asphaltenes are key and the interaction of asphaltenes with other crude oil fractions or surfactants determines the success of surfactant-steam processes. The polar interactions favor the emulsion formation more; hence, if the polar interactions are more dominant than the ion interactions in the overall crude oil–surfactant system, the surfactant flooding process into heavy oil reservoir became more successful.

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Effect of clay presence and solvent dose on hybrid solvent-steam performance

Cited by 25 publications

References 21 publications

Pyrolysis and Oxidation of Asphaltene-Born Coke-like Residue Formed onto in Situ Prepared NiO Nanoparticles toward Advanced in Situ Combustion Enhanced Oil Recovery Processes

Pyrolysis and Oxidation of Asphaltene-Born Coke-like Residue Formed onto in Situ Prepared NiO Nanoparticles toward Advanced in Situ Combustion Enhanced Oil Recovery Processes

Insights into Enhanced Oil Recovery by Polymer-Viscosity Reducing Surfactant Combination Flooding in Conventional Heavy Oil Reservoir

Intermolecular Interaction between Heavy Crude Oils and Surfactants during Surfactant-Steam Flooding Process

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Effect of clay presence and solvent dose on hybrid solvent­-steam performance

Cited by 25 publications

References 21 publications

Pyrolysis and Oxidation of Asphaltene-Born Coke-like Residue Formed onto in Situ Prepared NiO Nanoparticles toward Advanced in Situ Combustion Enhanced Oil Recovery Processes

Pyrolysis and Oxidation of Asphaltene-Born Coke-like Residue Formed onto in Situ Prepared NiO Nanoparticles toward Advanced in Situ Combustion Enhanced Oil Recovery Processes

Insights into Enhanced Oil Recovery by Polymer-Viscosity Reducing Surfactant Combination Flooding in Conventional Heavy Oil Reservoir

Intermolecular Interaction between Heavy Crude Oils and Surfactants during Surfactant-Steam Flooding Process

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Effect of clay presence and solvent dose on hybrid solvent-steam performance