DOI: 10.1016/j.jcou.2016.02.002
Scopus记录号: 2-s2.0-84958758025
论文题名: Diffusion coefficients of supercritical CO2 in oil-saturated cores under low permeability reservoir conditions
作者: Li S. ; Li Z. ; Dong Q.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2016
卷: 14 起始页码: 47
结束页码: 60
语种: 英语
英文关键词: Diffusion coefficient
; Porous media
; Supercritical CO2
Scopus关键词: Carbon capture
; Carbon dioxide
; Crude oil
; Diffusion
; Enhanced recovery
; Equations of state
; Low permeability reservoirs
; Magnetic cores
; Mechanical permeability
; Oil well flooding
; Porous materials
; Risk assessment
; Calculation accuracy
; Carbon capture and storages (CCS)
; Enhanced oil recovery
; Experimental parameters
; Increase in pressure
; Saturated porous media
; Supercritical CO
; Transport in porous media
; Petroleum reservoir engineering
英文摘要: CO2 diffusion in oil-saturated porous media with low permeability is of great importance for the project design, risk assessment, and performance forecast of carbon capture and storage (CCS) or enhanced oil recovery (EOR). This paper developed a method to determine CO2 diffusion in oil-saturated cores under low permeability reservoir conditions. Core, crude oil and experimental parameters were taken from the representative low permeability reservoir. In the solution of the mathematical model, oil saturation was introduced in to diffusion equation, an oil-phase swelling caused by gas dissolution was considered, but a water-phase swelling was not, which is in agreement with the actual diffusion situation. The error caused by the state equation of carbon dioxide was eliminated, improving the calculation accuracy of the diffusion coefficient. The effects of pressure (6.490-29.940 MPa), temperature (70-150°C), oil saturation (0-63.58%) and permeability (8.62-985.06 mD) on the diffusion coefficient of supercritical CO2 in low-permeability reservoirs were studied. The order of the diffusion coefficient is from 10-10 to 10-9 m2/s. The results show that with an increase in pressure and temperature, the CO2 diffusion coefficient in the porous media saturated with oil firstly increases significantly and then the rate of increase gradually slowed down. The CO2 diffusion coefficient increases greatly with the oil saturation in porous media. The CO2 diffusion coefficient first increases greatly with permeability, and when the permeability of the core is greater than approximately 100 mD, it remains almost stable. The experimental results can provide theoretical support for CO2 transport in porous media. © 2016 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52922
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
Recommended Citation:
Li S.,Li Z.,Dong Q.. Diffusion coefficients of supercritical CO2 in oil-saturated cores under low permeability reservoir conditions[J]. Journal of CO2 Utilization,2016-01-01,14