DOI: 10.1016/j.jcou.2018.09.006
Scopus记录号: 2-s2.0-85053595725
论文题名: Effects of CO2 miscible flooding on oil recovery and the alteration of rock properties in a carbonate reservoir
作者: Han J. ; Han S. ; Sung W. ; Lee Y.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 28 起始页码: 26
结束页码: 40
语种: 英语
英文关键词: Carbonate
; CO2 miscible flooding
; Dissolution
; Pore structure
; Precipitation
Scopus关键词: Calcite
; Carbon dioxide
; Carbonates
; Carbonation
; Chemical analysis
; Dissolution
; Floods
; Flow of fluids
; Lime
; Limestone
; Oil well flooding
; Pore size
; Pore structure
; Precipitation (chemical)
; Reservoirs (water)
; Carbonate cores
; Carbonate reservoir
; Critical determinant
; Heterogeneous medium
; Miscible flooding
; Rock properties
; Structure analysis
; Undesirable effects
; Structural properties
英文摘要: This study experimentally investigated the impact of CO2 miscible flooding on oil recovery and alteration of rock properties in two carbonate cores consisting of more than 98% calcite: Edwards white representing a homogenous medium mainly consisted of micropores, and Indiana limestone representing a heterogeneous medium mostly composed of macropores. Several methods were applied to investigate the alteration of rock properties by CO2-water-carbonate minerals interactions: 1) Core flooding to measure overall changes, 2) MICP and X-ray CT to analyze small pores and large pores, respectively, 3) SEM, PCM, and ICP to verify physical and chemical reactions. Oil recovery was higher in Edwards white than in Indiana limestone, since characteristic of Edwards white contributes to sufficient contact time and stable displacement between oil and CO2. From the analysis of the alteration of rock properties in homogenous sample, dissolution facilitates the enlargement of pore sizes. Therefore, fluid flow becomes more favorable. The precipitation is not critical determinant of alteration process, despite the high proportion of small pores. For heterogeneous sample, both dissolution and precipitation significantly affect to alteration of pore structure. Particularly, the precipitation seriously damaged to the main flow channels. These undesirable effects on fluid flow appeared at injection point, which was exposed to fresh CO2 for a long time. This study suggests that pore structure analysis allows a more exact interpretation and judgment of the alteration of pore structure by dissolution and precipitation and can assist in designing injection plans, particularly near the injection area or in complex pore structure. © 2018 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/111764
Appears in Collections: 气候减缓与适应
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作者单位: Department of Mineral Resources and Energy Engineering, Chonbuk National University, 567 Baekje-daero, Jeonju-si, Deokjinflow-gu, Jeollabuk-do, 54896, South Korea; Department of Natural Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul, Seongdong-gu, 04763, South Korea
Recommended Citation:
Han J.,Han S.,Sung W.,et al. Effects of CO2 miscible flooding on oil recovery and the alteration of rock properties in a carbonate reservoir[J]. Journal of CO2 Utilization,2018-01-01,28