Details
| Original language | English |
|---|---|
| Publication status | Published - 23 Jun 2019 |
| Event | 53rd U.S. Rock Mechanics/Geomechanics Symposium - Brooklyn, United States Duration: 23 Jun 2019 → 26 Jun 2019 |
Conference
| Conference | 53rd U.S. Rock Mechanics/Geomechanics Symposium |
|---|---|
| Country/Territory | United States |
| City | Brooklyn |
| Period | 23 Jun 2019 → 26 Jun 2019 |
Abstract
During the last decades the importance as well as the number of gas storage caverns in rock salt to store natural gas, compressed air or hydrogen have increased. Especially during the last years, research on the storage of compressed air and hydrogen gained importance in order to increase the storage capacity of renewable energies. While withdrawing gas, the temperature within caverns decreases. This can cause tensile stress development at the cavern wall. Since the tensile strength of rock salt is relatively low, tensile stresses are likely to induce cracks. The gas penetrates into the fractures and may lead to further propagation. It is currently subject of research to investigate the process of thermally-induced and gas-pressure driven fracturing as part of safety assessment of gas storage caverns. The question to be answered is, if fracturing occurs, how far do cracks penetrate into the surrounding rock salt. In this paper the theoretical approaches of thermally-induced and gas-pressure driven fracture propagation which are used for the geomechanical, numerical calculations for rock mechanical dimensioning of gas storage caverns in rock salt are presented. Additionally, numerical results of fracture propagation in rock salt are described and discussed.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
- Earth and Planetary Sciences(all)
- Geophysics
Sustainable Development Goals
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2019. Paper presented at 53rd U.S. Rock Mechanics/Geomechanics Symposium, Brooklyn, United States.
Research output: Contribution to conference › Paper › Research › peer review
}
TY - CONF
T1 - Investigations on thermally-induced and gas-pressure driven fractures in rock salt
AU - Siemann, Lennart
AU - Leuger, Bastian
AU - Zapf, Dirk
PY - 2019/6/23
Y1 - 2019/6/23
N2 - During the last decades the importance as well as the number of gas storage caverns in rock salt to store natural gas, compressed air or hydrogen have increased. Especially during the last years, research on the storage of compressed air and hydrogen gained importance in order to increase the storage capacity of renewable energies. While withdrawing gas, the temperature within caverns decreases. This can cause tensile stress development at the cavern wall. Since the tensile strength of rock salt is relatively low, tensile stresses are likely to induce cracks. The gas penetrates into the fractures and may lead to further propagation. It is currently subject of research to investigate the process of thermally-induced and gas-pressure driven fracturing as part of safety assessment of gas storage caverns. The question to be answered is, if fracturing occurs, how far do cracks penetrate into the surrounding rock salt. In this paper the theoretical approaches of thermally-induced and gas-pressure driven fracture propagation which are used for the geomechanical, numerical calculations for rock mechanical dimensioning of gas storage caverns in rock salt are presented. Additionally, numerical results of fracture propagation in rock salt are described and discussed.
AB - During the last decades the importance as well as the number of gas storage caverns in rock salt to store natural gas, compressed air or hydrogen have increased. Especially during the last years, research on the storage of compressed air and hydrogen gained importance in order to increase the storage capacity of renewable energies. While withdrawing gas, the temperature within caverns decreases. This can cause tensile stress development at the cavern wall. Since the tensile strength of rock salt is relatively low, tensile stresses are likely to induce cracks. The gas penetrates into the fractures and may lead to further propagation. It is currently subject of research to investigate the process of thermally-induced and gas-pressure driven fracturing as part of safety assessment of gas storage caverns. The question to be answered is, if fracturing occurs, how far do cracks penetrate into the surrounding rock salt. In this paper the theoretical approaches of thermally-induced and gas-pressure driven fracture propagation which are used for the geomechanical, numerical calculations for rock mechanical dimensioning of gas storage caverns in rock salt are presented. Additionally, numerical results of fracture propagation in rock salt are described and discussed.
UR - http://www.scopus.com/inward/record.url?scp=85084023908&partnerID=8YFLogxK
M3 - Paper
T2 - 53rd U.S. Rock Mechanics/Geomechanics Symposium
Y2 - 23 June 2019 through 26 June 2019
ER -