利用異質孔徑界面增強多孔介質內流體驅替效果之研究

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林鴻諭(Hung-Yu Lin) 查詢紙本館藏

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能源工程研究所

論文名稱

利用異質孔徑界面增強多孔介質內流體驅替效果之研究

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摘要(中)

本文為利用異質孔徑界面增強低黏度空氣於多孔隙介質驅替高黏度矽油效果之研究。實驗採用一水平線性Hele-Shaw cell系統填充含異質孔徑界面之多孔隙介質，此異質孔徑界面為兩種粒徑玻璃珠組成之多孔隙異構性組合系統，內部充滿高黏度矽油。實驗觀察低黏度空氣推動多孔隙介質內高黏度矽油過程中，發現指狀流動為高黏度流體驅替效果低落之原因。為建立一套增強低黏度流體驅替多孔隙介質內高黏度流體之方法，實驗設計五種粗、細玻璃珠所占長度比例不同之多孔隙異構性組合，分別為1:0、3:1、1:1、1:3、0:1，分析不同空氣注入流率對於不同粒徑介質內部高黏度流體驅替之結果。
兩種注入流率實驗條件結果顯示，指形流動受到異質孔徑邊界的阻擋可增強粗顆粒區域玻璃珠內高黏度矽油之驅替效果，並受流率降低影響，指狀流動遂發展為碎形維度較大之指形結構，如結構較大之黏性指形、毛細指形，可增加被驅替流體面積。比較此五組多孔隙異構性組合，發現若縮短粗顆粒區域所占顆粒填充長度，可提高此被驅替流體面積所占百分比，換言之，即可達到較高的空氣注入飽和度。

摘要(英)

This research presents an experimental study of enhancing fluid displacement through porous media with a heterogeneous pore-scale boundary, where the displaced fluid (silicone oil) was more viscous than the displacing fluid (air). We used a horizontal linear Hele-Shaw cell with two different sizes of glass beads to model the porous media with different pore sizes. Previous research has shown that a fluid cannot uniformly displaces another relatively more viscous fluid through a porous medium, leaving a finger-like flow pattern in the medium. In order to create a system for more effectively displacing viscous fluid through a porous medium, we proposed a heterogeneous porous medium model. Five different length ratios (1:0, 3:1, 1:1, 1:3, 0:1) of coarse glass bead region to fine glass bead region were considered.
Using this heterogeneous porous medium model, fluid displacement experiments with different air injection rates were performed. Our results showed that much more viscous silicone oil in the coarse glass bead region could be displaced by the less viscous air because the heterogeneous pore-scale boundary prevented the finger-like flow from directly invading into the fine glass bead region. With lower air injection rates the viscous finger had higher fractal dimensions, which could also increase the displaced fluid volume. Comparing the results from the five heterogeneous configurations, we found that shortening the length of the coarse glass bead region increased the ratio of displaced fluid volume in the porous medium, resulting in higher air injection saturation results.

關鍵字(中)

★ 異質孔徑界面
★ 驅替
★ 多孔隙介質
★ 指狀流動
★ 碎形維度
★ 空氣注入飽和度

關鍵字(英)

★ heterogeneous pore-scale boundary
★ displacement
★ porous medium
★ fingering flow
★ fractal dimension
★ air injection saturation

論文目次

摘要 I
Abstract II
表目錄 VI
圖目錄 VII
符號說明 XIV
第一章緒論 1
1-1 研究動機 1
1-2 文獻回顧 3
1-2-1 純流體指形不穩定現象 3
1-2-2 多孔隙介質指形流動 4
1-3 研究目的 8
第二章實驗系統 19
2-1 Hele-Shaw cell系統 19
2-2 空氣注入系統 19
2-2-1 注射泵 20
2-2-2 壓力量測系統 20
2-2-3 安捷倫資料擷取系統 21
2-3 背光源系統 21
2-4 實驗方法 22
2-4-1 不同長度比例之異構性多孔隙組合 22
2-4-2 推估滲透度值(permeability) 23
2-4-3 推估孔隙率(porosity) 24
2-4-4 空氣注入飽和度 24
2-4-5 影像觀測裝置 25
2-4-6 碎形維度分析(fractal dimension analysis) 26
第三章結果與討論 36
3-1 量測毛細閥壓力(Capillary threshold pressure) 36
3-1-1 多孔隙介質流動態壓力(Dynamic pressure in porous medium) 36
3-1-2 壓力分析方式 37
3-1-3 實驗結果 37
3-2 不同長度比例之異構性多孔隙組合 38
3-2-1 壓力分析方式 38
3-2-2 流體驅替結果 39
3-2-3 壓力分析結果 45
3-2-4 消耗功 46
3-2-5 碎形維度 47
第四章結論與未來展望 68
4-1 結論 68
4-2 未來展望 69
參考文獻 70

參考文獻

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指導教授

鍾志昂

審核日期

2016-8-25

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