Analytical approach for estimating CO 2 storage capacity of produced gas reservoirs with or without a water drive

Chi Chung Tseng, Bieng Zih Hsieh, Shin Tai Hu, Zsay Shing Lin

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An analytical CO 2 injection equation for estimating effective CO 2 storage capacity is derived and verified for a gas reservoir producing gas, followed by injecting CO 2 into the reservoir with a water drive. The equation can be expressed in the forms of an injection-production-ratio (IPR) equation and the p/z equation. An effective capacity coefficient can be obtained either from the ratio of effective CO 2 storage capacity and theoretical CO 2 storage capacity, or from the IPR and z-factors. In a gas reservoir with a water drive, the CO 2 injected to increase the pressure from the abandonment pressure to the initial pressure is less than the gas produced. The single effective capacity coefficient is less than one depending on the strength of the water drive. In a gas reservoir with no water drive, the CO 2 injected to increase the pressure from the abandonment pressure to the initial pressure is more than the gas produced. The single effective capacity coefficient is 1. The discussion includes examples of using the CO 2 injection equation and IPR type curves to estimate effective CO 2 storage capacity, and pressure behaviors in p/z plots [p/z versus (G phc-G inj)] during gas production and CO 2 injection.

Original languageEnglish
Pages (from-to)254-261
Number of pages8
JournalInternational Journal of Greenhouse Gas Control
Volume9
DOIs
Publication statusPublished - 2012 Jul 1

All Science Journal Classification (ASJC) codes

  • Pollution
  • Energy(all)
  • Industrial and Manufacturing Engineering
  • Management, Monitoring, Policy and Law

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