Understanding the CO2 adsorption hysteresis under low pressure: An example from the Antrim Shale in the Michigan Basin: Preliminary observations

Kouqi Liu, Natalia Zakharova, Adedoyin Adeyilola, Thomas Gentzis, Humberto Carvajal-Ortiz, Hallie Fowler

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The gas adsorption hysteresis effects have strong implications for the characterization of the micropore structure, which is one of the most important properties of shales. This study describes one of the first investigations of low-pressure CO2 adsorption hysteresis illustrated on the Antrim Shale samples, Michigan Basin. A total of 23 samples were characterized by using a combination of X-Ray diffraction (XRD), Rock-Eval pyrolysis, scanning electron microscope (SEM) imaging and CO2 adsorption. The partial least linear regression (PLS) was employed to study the influence of rock composition on the micropore structures and hysteresis index (HI). The results showed that the micropore parameters (surface area and volume) are positively correlated to the amount of organic matter and clay minerals, and have a negative correlation to non-clay minerals. In the Antrim Shale samples, the CO2 adsorption hysteresis seen under low pressure appears to be controlled mainly by the pore network effect caused by the presence of ink-bottle shaped pores, rather than by the swelling of clays and organic matter.

Original languageEnglish
Article number108693
JournalJournal of Petroleum Science and Engineering
Volume203
DOIs
StatePublished - Aug 2021

Keywords

  • Adsorption hysteresis
  • Antrim shale
  • Hysteresis index
  • Micropore structures
  • PLS

Fingerprint

Dive into the research topics of 'Understanding the CO2 adsorption hysteresis under low pressure: An example from the Antrim Shale in the Michigan Basin: Preliminary observations'. Together they form a unique fingerprint.

Cite this