Experimental and numerical analysis on the specific storage of low permeable sandstone for supercritical CO2

Ardy Arsyad, Yasuhiro Mitani

Research output: Contribution to journalArticle

Abstract

Experimental tests and numerical analysis were undertaken to investigate the specific storage of sedimentary rocks for supercritical CO2. New laboratory system of constant flow pump permeability test was developed in order to measure permeability and specific storage of sedimentary rock in similar physical condition of deep aquifer where CO2 tends to be in supercritical phase. To analyze experimental results, numerical analysis was established by extending the theoretical model of constant flow permeability to deal with two phase flow drainage displacement. For the examination of its applicability, experimental test was undertaken in which Ainoura sandstone used as core sample, injected with supercritical CO2 under laboratory condition of 35°C constant reservoir temperature, 10 MPa initial hydraulic pressure, and 20 MPa constant overburden pressure The experimental results show that, average specific storage of Ainoura sandstone is about 3.74×10-4 1/Pa at a maximum CO2 saturation of 0.55, and volumetric strain increases about 0.7%. The accuracy of specific storage measured was validated with ratio of the specific storage of the sandstone to the storage capacity of the pump used in the permeability test. This finding suggested that newly developed constant flow pump technique with its numerical analysis can be used to effectively obtain specific storage of sedimentary rock for CO2 in supercritical phase.

Original languageEnglish
Pages (from-to)18-34
Number of pages17
JournalUnknown Journal
Volume2016-January
Issue number257 GSP
DOIs
Publication statusPublished - 2016

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All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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