EconPapers    
Economics at your fingertips  
 

Effect of different mix compositions on apparent carbon dioxide (CO2) permeability of geopolymer: Suitability as well cement for CO2 sequestration wells

M.C.M. Nasvi, P.G. Ranjith and J. Sanjayan

Applied Energy, 2014, vol. 114, issue C, 939-948

Abstract: The wellbore integrity is a key factor for a successful oil, gas and carbon capture and storage (CCS) projects and the durability of the cement used in the wellbore plays a vital role in the long term safety of those projects. To date, Ordinary Portland cement (OPC) has been used in the wells used in oil and gas industry, and it is found to be unstable under down-hole pressures and temperatures conditions. Therefore, this research work intends investigating an alkali activated inorganic binder, geopolymer, as well cement and study the apparent CO2 permeability of different types of geopolymer. Three different types of geopolymer was prepared by adding 0%, 8% and 15% of alkali activated slag (by mass) with fly ash, and existing class G oil cement was tested for the comparison of results. Sub and supercritical CO2 permeability was experimented at different injection and confining pressures expected under deep down-hole environment. The experimental results reveal that the apparent CO2 permeability of geopolymers (0.0005–0.002μD) is two to three orders lower than class G cement (0.12–2.6μD) depending on the mix compositions of geopolymer. The addition of 15% slag reduces the permeability by approx. 10times compared to fly ash based geopolymer and 1000times compared to class G cement. Alkali activated geopolymer materials can be a good replacement for existing OPC based cement as they have lower CO2 permeability, and can be employed in shallow and deeper depths of injection wells by changing the mix composition.

Keywords: Apparent permeability; Geopolymer; Fly ash; Well cement; Zonal isolation (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations View citations in EconPapers (2) Track citations by RSS feed

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261913004625
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:114:y:2014:i:c:p:939-948

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Series data maintained by Dana Niculescu ().

 
Page updated 2017-09-29
Handle: RePEc:eee:appene:v:114:y:2014:i:c:p:939-948