Journal ArticleDOI
Numerical analysis of viscous fingering and oil recovery by surfactant and polymer flooding in five-spot setup for water and oil-wet reservoirs
Rahul Samala,Abhijit Chaudhuri,R. Vishnudas,Jakka Yeswanth,V. Selvam +4 more
- Vol. 6, Iss: 1, pp 1-18
TLDR
In this article, a quantitative comparison of output, i.e., oil recovery vs inputs such as injected mass of chemicals, injection duration and pumping energy, is made, which is of interest to industry.Abstract:
Surfactant and polymer are used to improve oil recovery. The micro-emulsion phase composition, viscosity and interfacial tension vary with salinity and injection concentration of chemicals. The viscosity contrast which is very large for heavy oil reservoirs, results in various types of viscous instabilities. There is no comprehensive field-scale modelling on the viscous fingering affecting the oil recovery for different types of surfactant-polymer (SP) flooding. We numerically simulated the above phenomena for different types of SP flooding in five-spot wells setup for both water-wet and oil-wet reservoirs. We have observed that many saturation shocks and banks of micro-emulsion, water and polymer are formed. The viscous fingering at the interface of these banks depend on the reservoir wettability, micro-emulsion phase behaviour and injection concentration of chemicals. Fingering can be suppressed by changing the duration of injection and concentration of surfactant and polymer. We have shown that Type II(+) flooding produces more oil than Type II(−) and Type III. But the oil production by Type II(−) can be increased by adopting better injection strategies. We have made a quantitative comparison of output, i.e., oil recovery vs inputs such as injected mass of chemicals, injection duration and pumping energy, which is of interest to industry. The pumping energy requirement is higher for Type II(−) flooding irrespective of wettability. Our results show that short duration injection of surfactant with multistep reduction of polymer concentration suppresses viscous instabilities and produce more than 90% OOIP.read more
Citations
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Journal ArticleDOI
Numerical modeling of viscous fingering during miscible displacement of oil by a paraffinic solvent in the presence of asphaltene precipitation and deposition
Nasser Sabet,Mohammadjavad Mohammadi,Ali Zirahi,Mohsen Zirrahi,Hassan Hassanzadeh,Jalal Abedi +5 more
TL;DR: In this article, the mixing dynamics of a paraffinic solvent with oil in the context of miscible displacement in porous media for enhanced oil recovery were studied. And the results of their numerical simulations reveal that despite having a great impact on the permeability field, asphaltene precipitation and deposition do not influence the growth of viscous fingers, noticeably, which is due to the substantial viscosity ratio of the studied system.
Journal ArticleDOI
Systematic sensitivity analysis to investigate performance of carbonated water injection based on computational dynamic modeling
TL;DR: In this article, the mass balance equations, momentum balance equations and reaction equations are solved for the same computational domains of CO2, water, and oil phases, and validated by the core scale experimental data of carbonated water injection in its secondary application.
Journal ArticleDOI
New Phase Diagram of Miscible Viscous Fingering Instabilities in Porous Media with Dead-End Pores
TL;DR: In this article , the authors investigated numerically how non-negligible dead-end pores, together with a limited mass transfer rate between the two pore types, affect fingering dynamics.
Journal ArticleDOI
Three-dimensional structural modeling and deformation analysis of Archean magnetite quartzite from the Anshan–Benxi area, northeastern China
Chong Peng,Chong Peng,Bao-Zhi Pan,Lin-Fu Xue,Chuan-qi Dai,Hai-yan Liu,Hai-yan Liu,Kai Zhu,Chun-hui Xu +8 more
TL;DR: In this article, a micro-scale, 3D structural modeling of representative hand specimens of the magnetite quartzite is presented, which allows the deformational characteristics of the banded iron formation to be quantified on a hand specimen scale.
References
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Journal ArticleDOI
Wettability and Its Effect on Oil Recovery
TL;DR: In this paper, the authors considered the relationship between reservoir wettability and its relationship to interface boundary con- ditions, and the effect of reservoir wetness on oil recovery.
Book
Modern Chemical Enhanced Oil Recovery: Theory and Practice
TL;DR: In the field of chemical enhanced oil recovery (EOR), the recent developments in the area as well as the technology for enhancing oil recovery can be found in this article, where the authors provide a clear picture of fundamental concepts, underlying theoretical and modelling methods, operational parameters, solutions and sensitivity studies, and performance optimization strategies.
Journal ArticleDOI
Effect of Wettability on Waterflood Recovery for Crude-Oil/Brine/Rock Systems
TL;DR: In this paper, the effect of wettability on oil recovery from the Berea sandstone was investigated using more than 50 slow-rate laboratory waterfloods, and the results showed that the maximum oil recovery was obtained at very weakly water-wet conditions from shortly after breakthrough up to discontinuation of the test at 20 PV of water injected.
Journal ArticleDOI
Interrelationship of Wettability, Initial Water Saturation, Aging Time, and Oil Recovery by Spontaneous Imbibition and Waterflooding
TL;DR: In this article, a modified Amott wettability index to water, the relative pseudowork of imbibition, and a newly defined apparent advancing dynamic contact angle were measured for each induced wetting states.