A parametric study to investigate the effect of injection and production well operation on the CO2 sequestration process in deep unmineable coal seams

Mandadige Samintha Anne Perera, Ranjith Pathegama Gamage, Sing-Ki Xavier Choi

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Abstract

The main objective of this study was to conduct a parametric study using a 3D numerical model to optimize the CO 2 sequestration process in a 540m×500m×20m coal seam, located at 1000m below the ground surface. Three model parameters were considered: injection pressure, the number and location of injection wells and the location of a production well. According to the model results, CO 2 storage capacity can be improved for the model coal seam by increasing the injection pressure, thereby opening existing cleat systems and/or inducing new fractures in the coal. CO 2 storage capacity cannot be increased by simply increasing the number of injection wells, as the location of the wells influences CO 2 distribution in the storage process. CO 2 storage capacity can be increased by introducing a production well, but the optimum distance between the injection and production well is sensitive to various factors.A numerical model can be used to assess the effects of operational parameters such as injection pressure and the number of wells and their location on the performance of a deep coal seam CO 2 sequestration system. © 2012 Taylor & Francis Group, London.

Original languageEnglish
Title of host publicationHarmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics
Subtitle of host publicationBeijing; China; 18 October 2011 through 21 October 2011
EditorsQihi Qian, Yingxin Zhou
Place of PublicationLeiden The Netherlands
PublisherCRC Press
Pages1353 - 1356
Number of pages4
ISBN (Electronic)9780203135259
ISBN (Print)9780415804448
DOIs
Publication statusPublished - 2012
EventInternational Society of Rock Mechanics Series of Symposia and Conferences 2011 - China National Convention Center (CNCC), Beijing, China
Duration: 18 Oct 201121 Oct 2011
Conference number: 12th
https://www.isrm.net/gca/index.php?id=1053

Conference

ConferenceInternational Society of Rock Mechanics Series of Symposia and Conferences 2011
Abbreviated titleISRM 2011
CountryChina
CityBeijing
Period18/10/1121/10/11
OtherInternational Congress on Rock Mechanics of the International Society for Rock Mechanics 2011

Proceedings title = Harmonising Rock Engineering and the Environment
Internet address

Keywords

  • CO injection
  • Deep coal seam sequestration
  • Numerical modeling

Cite this

Perera, M. S. A., Pathegama Gamage, R., & Choi, S-K. X. (2012). A parametric study to investigate the effect of injection and production well operation on the CO2 sequestration process in deep unmineable coal seams. In Q. Qian, & Y. Zhou (Eds.), Harmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics: Beijing; China; 18 October 2011 through 21 October 2011 (pp. 1353 - 1356). CRC Press. https://doi.org/10.1201/b11646-255