Indexed by:会议论文

First Author:Zhang, Yi

Co-author:Liu, Shuyang,Song, Yongchen,Zhao, Jiafei,Tang, Lingyue,Xing, Wanli,Jian, Weiwei,Liu, Zhaoyan,Zhan, Yangchun

Date of Publication:2014-01-01

Included Journals:CPCI-S

Document Type:A

Volume:61

Page Number:393-397

Key Words:Enhanced Gas Recovery; Dispersion; CO2 Sequestration; Sand Pack; CT scan

Abstract:Enhanced Gas Recovery by injecting CO2 is one of the efficient scenarios to accelerate gas production if the excessive mixing can be avoided in the process of CO2-CH4 displacement. A laboratory investigation was presented to describe the detailed CO2-CH4 displacement and analyze CO2 dispersion into CH4 in the sand pack for pressure of 10-14 MPa at 40 degrees C with the CO2 injection rate of 0.2, 0.3 and 0.4 ml/min. And the displacement process was scanned by an X-ray micro-CT scanner. The results of CT scan images were consistent with the breakthrough profile obtained from outlet gas composition analysis. The dispersion coefficient is in the range from 4.478 x 10(-7) to 9.898 x 10(-7)mm(2)/s and it increase with interstitial velocity of CO2 and decrease with pressure. The dispersivity of BZ04 sand pack is calculated as 0.0054 m. (C) 2014 Published by Elsevier Ltd.

Translation or Not:no