Imperial College London
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ProfessorMartinBlunt

Faculty of Engineering, Department of Earth Science & Engineering

Chair in Flow in Porous Media
 
 
 
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Contact

 

+44 (0)20 7594 6500m.blunt Website

 
 
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Location

 

2.38ARoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ladipo:2022:10.1016/j.petrol.2021.109565,
author = {Ladipo, L and Blunt, MJ and King, PR},
doi = {10.1016/j.petrol.2021.109565},
journal = {Journal of Petroleum Science and Engineering},
pages = {1--26},
title = {Crossflow effects on low salinity displacement in stratified heterogeneity},
url = {http://dx.doi.org/10.1016/j.petrol.2021.109565},
volume = {208},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Crossflow is a major factor affecting recovery efficiency in heterogeneous permeable media. In typical water-oil displacements, viscous-dominated crossflow improves oil recovery efficiency relative to no-crossflow depending on the shock-front and/or the mobility ratio across the displacement front. Its impact is not yet fully understood for augmented or engineered waterfloods such as controlled/low salinity waterflooding (LSWF). This is critical in such a flood with two distinct displacement shock-fronts – unlike a standard waterflood – that are potentially influenced by mixing of the brines which further complicates the crossflow behaviour. This paper presents a comprehensive treatment of crossflow effects on recovery or displacement efficiency along stratified media of contrasting properties during LSWF considering physical dispersion.We define dimensionless numbers to characterize no-crossflow, viscous- and gravity-dominated crossflow regimes for different mobility-ratios. In two-dimensional numerical simulations, we explore the influence of property contrasts and mobility-ratios across the two distinct shock-fronts on the viscous crossflow behaviour in a LSWF. The sensitivity of viscous crossflow recovery and (low-salinity) engineered-water sweep efficiency to mobility-ratios is evaluated at different performance times relative to no-crossflow displacement.Viscous crossflow (VC) is found to be relevant in water-oil displacements for permeability contrasts less than or equal to 1000, but less important for EOR low-salinity displacement once the permeability contrast exceeds 50. For the mobility-ratio cases considered, VC is unidirectional – from the fast to slow layer – only when the mobility-ratios across the two distinct shock-fronts are both favourable. Unlike a typical water-oil displacement, the weak dependency of late-time recovery efficiency on VC is observed to be a function of the mobility-ratio and dispersion in LSWF. An unfavour
AU  - Ladipo,L
AU  - Blunt,MJ
AU  - King,PR
DO  - 10.1016/j.petrol.2021.109565
EP  - 26
PY  - 2022///
SN  - 0920-4105
SP  - 1
TI  - Crossflow effects on low salinity displacement in stratified heterogeneity
T2  - Journal of Petroleum Science and Engineering
UR  - http://dx.doi.org/10.1016/j.petrol.2021.109565
UR  - https://www.sciencedirect.com/science/article/pii/S0920410521012043?via%3Dihub
UR  - http://hdl.handle.net/10044/1/92231
VL  - 208
ER  -
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