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研究生:陳思螢
研究生(外文):Sih-YingChen
論文名稱:超臨界二氧化碳環境下對套管水泥斷裂韌度影響之研究
論文名稱(外文):A Study of the Fracture Toughness of API-G Well Cement with Additives Exposed to Supercritical CO2 Environment Using Chevron Notched Brazilian Disc Specimen Test
指導教授:王建力王建力引用關係
指導教授(外文):Chien-Li Wang
學位類別:碩士
校院名稱:國立成功大學
系所名稱:資源工程學系碩博士班
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:136
中文關鍵詞:API-G級套管水泥超臨界二氧化碳斷裂力學
外文關鍵詞:API-G well cementsupercritical carbon dioxidefracture mechanics
相關次數:
  • 被引用被引用:2
  • 點閱點閱:140
  • 評分評分:
  • 下載下載:7
  • 收藏至我的研究室書目清單書目收藏:1
二氧化碳存入地下以地質封存方式進行減量是一項可行的工程手段。前人研究表明二氧化碳與水結合會形成碳酸,形成一個對水泥侵蝕的酸性環境。因此評估保護井孔的套管水泥在長期的封存下是否能安全且有效的封存二氧化碳為必須進行的研究課題。
本研究針對API-G級套管水泥材料及添加飛灰之水泥材料在超臨界二氧化碳環境反應後進行試驗,先將其水泥漿體製備成巴西缺口試體,放進超臨界二氧化碳環境下 (溫度70℃、壓力20 MPa) 個別反應不同天數 (7-28天),以模擬進行二氧化碳封存時井底下1500 m~2000 m套管水泥材料基本力學性質、斷裂力學性質及化學結構性質上之變化。實驗觀察發現隨著不同的反應天數,而試體本身有不同程度碳化現象,其中以添加飛灰之水泥有最佳的強度且有最深的碳酸鈣堆積層。

The carbon dioxide (CO2) deposition in underground geologic sequestration is a feasible approach to reduce CO2 emission. Previous studies have shown that CO2 combines with water to form carbonic acid (H2CO3) which is the formation of an acidic environment of cement erosion. Therefore, the long-term wellbore integrity of the cement sheath should be carefully evaluated to ensure the safe and efficient storage of the CO2.
In this study, the Brazilian notched cement specimens along with other appropriate samples were prepared and were placed into the supercritical carbon dioxide environment over a period of days. The experimental temperature is 70oC and the experimental pressure is 20 MPa. The basic mechanical properties, fracture mechanical properties and chemical structure properties of the API-G well cement with fly ash were investigated. This study finds that the cement specimens have varying degrees of carbonization with the different number of reaction days,. This study also concludes that the API-G cement with fly ash displays the best strength with deepest penetrating depth of carbonization.

摘要 I
Abstract II
致謝 III
目錄 V
表目錄 VIII
圖目錄 IX

第一章 緒論 1
1-1研究背景 1
1-2研究動機與目的 3
1-3研究內容與流程 5

第二章 文獻回顧 7
2-1套管水泥 8
2-2水泥添加物--飛灰 10
2-3二氧化碳地底封存狀態 11
2-4二氧化碳地底封存之評估 13
2-5二氧化碳對水泥裂縫之影響 15
2-6斷裂力學簡介 18
2-6-1歷史發展 18
2-6-2裂縫之來源與影響 19
2-6-3線彈性斷裂力學 20
2-7應力強度因子 25

第三章 試驗方法與數據分析 31
3-1 基本物理性質試驗 32
3-2單軸壓縮試驗 33
3-3三點彎曲試驗 37
3-4斷裂韌度試驗 39
3-5 J 積分 47
3-6試體材料 49
3-7試體製備 51
3-8模擬地層水之設定 56
3-9試驗設備 57
3-9-1二氧化碳反應設備 57
3-9-2載重系統及資料擷取系統 60
3-9-3攝影設備 62
3-9-4掃描式電子顯微鏡 (SEM) 設備 67

第四章 試驗結果與討論 68
4-1基本物理性質試驗結果 68
4-2基本力學試驗結果 71
4-2-1單軸壓縮試驗結果 71
4-2-2三點彎曲試驗結果 77
4-3斷裂韌度試驗結果 79
4-3-1斷裂韌度試驗之討論 79
4-3-2 J 積分之討論 89
4-3-3開裂角之討論 91
4-3-4裂紋擴展觀測 99
4-3-5水泥碳化面積分析 106
4-3-6掃描式電子顯微鏡 (SEM) 分析結果 111
4-4單軸壓縮與斷裂韌度之關係 118

第五章 結論與建議 125
5-1結論 125
5-2建議 129

參考文獻 130
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