Numerical temperature prediction system in injection tubing, bottom hole and reservoir condition for supercritical CO2 injection into deep coal seams

T. Yasunami, Kyuro Sasaki, Yuichi Sugai

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

The Japan consortium to enhance the CO2 sequestration into coal seams has carried out a project on CO2 injection at Yuhbari City, Hokkaido. However, supercritical condition of CO2 has not been satisfied due to heat loss along the deep injection tubing. The absolute pressure and CO2 temperature at the bottom hole are approximately 15.5MPa and 28ºC. Therefore, it can be assumed that CO2 is injected in liquid phase to the coal seam. The liquid CO2 causes decreasing injectivity into the coal seam due to high viscosity and swelling of the coal matrix. This study has provided a numerical procedure to predict the CO2 flow characteristics of pressure, temperature, supercritical or liquid in considering heat transfer from the injector to surrounding casings and strata. Present study has focused on the keeping supercritical CO2 in the tubing because viscosity of supercritical CO2 is 40% smaller than that of liquid CO2. The CO2 temperature has been successfully predicted in order to keep CO2 in supercritical condition from the surface to the bottom for various CO2 injection rates and electric heater power. Finally, Injected CO2 is expected to be supercritical over 12ton/day of injection rate without any heating.

本文言語英語
ホスト出版物のタイトルCanadian International Petroleum Conference 2008
出版社Petroleum Society of Canada (PETSOC)
ページ1-9
ページ数9
ISBN(印刷版)9781613991152
DOI
出版ステータス出版済み - 6月 17 2008
イベントCanadian International Petroleum Conference 2008, CIPC 2008 - Calgary, カナダ
継続期間: 6月 17 20086月 19 2008

出版物シリーズ

名前Canadian International Petroleum Conference 2008

その他

その他Canadian International Petroleum Conference 2008, CIPC 2008
国/地域カナダ
CityCalgary
Period6/17/086/19/08

!!!All Science Journal Classification (ASJC) codes

  • 地球化学および岩石学
  • エネルギー工学および電力技術

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