Petroleum Science >2018,??Issue 2:??297-304 DOI: https://doi.org/10.1007/s12182-017-0212-z
Compositional modeling and simulation of dimethyl ether (DME)- enhanced waterflood to investigate oil mobility improvement Open?Access
文章信息
作者：Jinhyung Cho, Tae Hong Kim and Kun Sang Lee
作者单位：
Department of Earth Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea,Department of Earth Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea and Department of Earth Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
投稿时间：2017-07-26
引用方式：Cho, J., Kim, T.H. & Lee, K.S. Pet. Sci. (2018) 15: 297. https://doi.org/10.1007/s12182-017-0212-z
文章摘要
Dimethyl ether (DME) is a widely used industrial compound, and Shell developed a chemical EOR technique called DMEenhanced 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.
关键词
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Dimethyl ether (DME), DME-enhanced waterflood (DEW), Solubility, Oil mobility