Dynamic Behavior of CO2 in a Wellbore and Storage Formation: Wellbore-Coupled and Salt-Precipitation Processes during Geologic CO2 Sequestration

Jize Piao, Weon Shik Han, Sungwook Choung, Kue Young Kim

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3 Citations (Scopus)

Abstract

For investigating the wellbore flow process in CO2 injection scenarios, coupled wellbore-reservoir (WR) and conventional equivalent porous media (EPM) models were compared with each other. In WR model, during the injection, conditions for the wellbore including pressure and temperature were dynamically changed from the initial pressure (7.45-8.33 MPa) and temperature (52.0-55.9°C) of the storage formation. After 3.35 days, the wellbore flow reached the steady state with adiabatic condition; temperature linearly increased from the well-head (35°C) to the well-bottom (52°C). In contrast, the EPM model neglecting the wellbore process revealed that CO2 temperature was consistently 35°C at the screen interval. Differences in temperature from WR and EPM models resulted in density contrast of CO2 that entered the storage formation (200 and 600 kg/m 3, resp.). Subsequently, the WR model causing greater density difference between CO2 and brine revealed more vertical CO2 migration and counterflow of brine and also developed the localized salt-precipitation. Finally, a series of sensitivity analyses for the WR model was conducted to assess how the injection conditions influenced interplay between flow system and the localized salt-precipitation in the storage formation.

Original languageEnglish
Article number1789278
JournalGeofluids
Volume2018
DOIs
Publication statusPublished - 2018

Bibliographical note

Funding Information:
This research was partially supported by Demonstration-ScaleOffshore CO2 Storage Project in Pohang, Basin, Republic of Korea, funded from Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) which was granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (no. 20162010201980) and also supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (no. 2016R1D1A1B01008715). The authors also acknowledge financial support by the Basic Research Project of the Korea Institute of Geoscience and Mineral Resources (KIGAM) funded by the Ministry of Science and ICT.

Funding Information:
This research was partially supported by Demonstration-Scale Offshore CO2 Storage Project in Pohang, Basin, Republic of Korea, funded from Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) which was granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (no. 20162010201980) and also supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (no. 2016R1D1A1B01008715). The authors also acknowledge financial support by the Basic Research Project of the Korea Institute of Geoscience and Mineral Resources (KIGAM) funded by the Ministry of Science and ICT.

Publisher Copyright:
Copyright © 2018 Jize Piao et al.

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)

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