Print Email Facebook Twitter Mechanistic Investigation of Vertical Sweep Efficiency in Miscible CO2-Water- Coinjection for EOR and CCUS Title Mechanistic Investigation of Vertical Sweep Efficiency in Miscible CO2-Water- Coinjection for EOR and CCUS Author Yu, G. (United Arab Emirates University) Tang, J. (United Arab Emirates University) Li, L. (University of Chinese Academy of Sciences) Rossen, W.R. (TU Delft Atmospheric Remote Sensing) Date 2023 Abstract The main objective of this study is to understand the vertical sweep efficiency with miscible CO2-water-coinjection as a secondary recovery method, from multiple perspectives: phase behavior, total relative mobility, fluid densities/viscosities, the driving forces and consequent phase distributions etc. We also seek to provide insights into modeling approaches for representing the injection process by comparing compositional simulation results to those of the fractional-flow method and the model of Stone and Jenkins ( Stone, 1982 ; Jenkins, 1984 ).We combine compositional simulation and analytical models to interpret the dynamics that affect vertical sweep efficiency in miscible CO2-water-coinjection. Stone’s model for gravity segregation at steady state predicts three phase-distribution zones: mixed zone, override zone and underride zone. In addition to these three zones, we identify from simulations an extended mixed zone and extended override zone in miscible CO2-water-coinjection, contributing to additional oil recovery and CO2 trapping. The extended zones are a result of dispersion that reflects physical and numerical dispersion in the gas-oil displacement front. To the extent that it reflects numerical dispersion, the extended zones can be considered as a numerical artifact. To reference this document use: http://resolver.tudelft.nl/uuid:232c81d5-78fb-48bb-b7db-82cdc3473d2a DOI https://doi.org/10.3997/2214-4609.202310827 Event 84th EAGE ANNUAL Conference and Exhibition 2023, 2023-06-05 → 2023-06-08, Vienna, Austria Part of collection Institutional Repository Document type conference paper Rights © 2023 G. Yu, J. Tang, L. Li, W.R. Rossen Files PDF 827.pdf 669.88 KB Close viewer /islandora/object/uuid:232c81d5-78fb-48bb-b7db-82cdc3473d2a/datastream/OBJ/view