Compositional modeling and simulation of dimethyl ether (DME)-enhanced waterflood to investigate oil mobility improvementopen access
- Authors
- Cho, Jinhyung; Kim, Tae Hong; Lee, Kun Sang
- Issue Date
- May-2018
- Publisher
- SPRINGEROPEN
- Keywords
- Dimethyl ether (DME); DME-enhanced waterflood (DEW); Solubility; Oil mobility
- Citation
- PETROLEUM SCIENCE, v.15, no.2, pp.297 - 304
- Indexed
- SCIE
SCOPUS
- Journal Title
- PETROLEUM SCIENCE
- Volume
- 15
- Number
- 2
- Start Page
- 297
- End Page
- 304
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/150094
- DOI
- 10.1007/s12182-017-0212-z
- ISSN
- 1672-5107
- Abstract
- Dimethyl ether (DME) is a widely used industrial compound, and Shell developed a chemical EOR technique called DME-enhanced waterflood (DEW). DME is applied as a miscible solvent for EOR application to enhance the performance of conventional waterflood. When DME is injected into the reservoir and contacts the oil, the first-contact miscibility process occurs, which leads to oil swelling and viscosity reduction. The reduction in oil density and viscosity improves oil mobility and reduces residual oil saturation, enhancing oil production. A numerical study based on compositional simulation has been developed to describe the phase behavior in the DEW model. An accurate compositional model is imperative because DME has a unique advantage of solubility in both oil and water. For DEW, oil recovery increased by 34% and 12% compared to conventional waterflood and CO2 flood, respectively. Compositional modeling and simulation of the DEW process indicated the unique solubility effect of DME on EOR performance.
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