Micro-CT in situ study of carbonate rock microstructural evolution for geologic CO2 storage

Yi Zheng, Yan Yang, M. Rogowska, Carsten Gundlach

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Abstract

To achieve the 2 degrees C target made in the 2016 Paris Agreement, it is essential to reduce the emission of CO2 into the atmosphere. Carbon Capture and Storage (CCS) has been given increasing importance over the last decade. One of the suggested methods for CCS is to inject CO2 into geologic settings such as the carbonate reservoirs in the North Sea. The final aim of our project is to find out how to control the evolution of petrophysical parameters during CO2 injection using an optimal combination of flow rate, injection pressure and chemical composition of the influent. The first step to achieve this is to find a suitable condition to create a stable 3D space in carbonate rock by injecting liquid to prepare space for the later CO2 injection. Micro-CT imaging is a non-destructive 3D method that can be used to study the property changes of carbonate rocks during and after CO2 injection. The advance in lab source based micro-CT has made it capable of in situ experiments. We used a commercial bench top micro-CT (Zeiss Versa XRM410) to study the microstructure changes of chalk during liquid injection. Flexible temporal CT resolution is essential in this study because that the time scales of coupled physical and chemical processes can be very different. The results validated the feasibility of using a bench top CT system with a pressure cell to monitor the mesoscale multiphase interactions in chalk.
Original languageEnglish
Title of host publicationProceedings of SPIE
Number of pages9
Volume10391
PublisherSPIE - International Society for Optical Engineering
Publication date2017
Article number103910M
DOIs
Publication statusPublished - 2017
EventDevelopments in X-Ray Tomography XI - San Diego Convention Center, San Diego, United States
Duration: 8 Aug 201710 Aug 2017

Conference

ConferenceDevelopments in X-Ray Tomography XI
LocationSan Diego Convention Center
CountryUnited States
CitySan Diego
Period08/08/201710/08/2017
SeriesProceedings of S P I E - International Society for Optical Engineering
Volume10391
ISSN0277-786X

Keywords

  • Micro-CT
  • Porosity
  • in situ
  • Oil Reservoir
  • 4D computed tomography

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