A preliminary laboratory experiment on coalbed methane displacement with carbon dioxide injection
✍ Scribed by Hongguan Yu; Jian Yuan; Weijia Guo; Jiulong Cheng; Qianting Hu
- Book ID
- 104013154
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 880 KB
- Volume
- 73
- Category
- Article
- ISSN
- 0166-5162
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✦ Synopsis
CH 4 /CO 2 adsorption isotherm studies on coals samples give adsorption behavior, adsorption ratio, and other influential factors for enhanced coalbed methane recovery (ECBM) and CO 2 sequestration by CO 2 injection. Yet, they only provide static characteristics, and do not provide information on pressure-driven and concentration-driven during gas recovery and injection processes. The purpose of this study is to construct an experimental apparatus for CH 4 displacement with CO 2 injection and primarily study the basic procedure of coalbed methane (CBM), ECBM, and CO 2 sequestration at driven-conditions.
An experimental apparatus was built based on the configuration of one-injection well/one-production well under ideal conditions. The apparatus was used to model CBM with CH 4 adsorption, investigate primary production of CBM and ECBM with gases desorption, and study CO 2 sequestration with its breakthrough. The change of pressure and gases amount during gases injection and desorption, and residual quantity after gases desorption were employed to ECBM and CO 2 sequestration with this equipment. The effect of CO 2 injection on CH 4 production was investigated on a small scale experimentally. The results indicate that the recovery procedure of ECBM and CO 2 sequestration with CO 2 injection can be studied with the apparatus and the gases adsorption/desorption characteristics obtained with the apparatus is obviously differ from that obtained with conventional volumetric measurement.