Abstract
chemicals could be effective for enhancing reservoir quality. The emission of
dissolved CO2 from geothermal water becomes more of an issue recently.
Biodegradable chelating agents could reduce CO2 emission since they offer high
chelating capacities on a large variety of minerals including calcium-rich minerals. Calcium has the capacity to bond with CO2, proving to be effective for CO2 sequestration.
| Original language | English |
|---|---|
| Pages | poster |
| Publication status | Published - 9 Aug 2019 |
| Event | International Conference on Energy, Aquatech and Sustainability 2019 - Nelson Mandela African Institute of Science and Technology, Arusha, Tanzania, United Republic of Duration: 9 Aug 2019 → 13 Aug 2019 http://iceas.snu.ac.kr/ |
Conference
| Conference | International Conference on Energy, Aquatech and Sustainability 2019 |
|---|---|
| Abbreviated title | ICEAS 2019 |
| Country | Tanzania, United Republic of |
| City | Arusha |
| Period | 9/08/19 → 13/08/19 |
| Internet address |
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Keywords
- geothermal
- chelating
- clay cap
- Reservoir
- biodegradable
- Permeability
- CO2
- ITC-GOLD
Cite this
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The Influence of Chelating Agents on Clays of the Geothermal Cap Rock: Implications for Enhancing Geothermal Reservoir Quality : poster. / Madirisha, Makungu Marco; Lievens, C.; Hack, H.R.G.K.; van der Meer, F.D.
2019. poster International Conference on Energy, Aquatech and Sustainability 2019, Arusha, Tanzania, United Republic of.Research output: Contribution to conference › Other
TY - CONF
T1 - The Influence of Chelating Agents on Clays of the Geothermal Cap Rock: Implications for Enhancing Geothermal Reservoir Quality : poster
AU - Madirisha, Makungu Marco
AU - Lievens, C.
AU - Hack, H.R.G.K.
AU - van der Meer, F.D.
PY - 2019/8/9
Y1 - 2019/8/9
N2 - Geothermal energy (Figure 1) is a green renewable energy source that h as potential to provide long-term energy with lower carbon footprint and maintenance costs than other renewable energy. A large portion of the world’s geothermal reserves is in sandstone reservoirs often characterized by quartz grains cemented with clays. Clays form also often the impervious boundary of the reservoir rock, the so-called caprock. Many geothermal reservoirs tend to lose permeability over time during production, therefore techniques are applied to enhance the reservoir quality in terms of fluid permeability. Partial dissolution of sand grains in the reservoir is a possibility to increase porosity and consequently permeability. However, the fluids used for dissolution should have limited reactions with the cementing clay minerals as this would cause collapse of the sandstone grain skeleton reducing permeability. Biodegradable chelating agents (BCA) compared to conventional chemicals (HF and HCl) have little reaction with clay, but can dissolve the sandstone grains; hence greenchemicals could be effective for enhancing reservoir quality. The emission ofdissolved CO2 from geothermal water becomes more of an issue recently.Biodegradable chelating agents could reduce CO2 emission since they offer highchelating capacities on a large variety of minerals including calcium-rich minerals. Calcium has the capacity to bond with CO2, proving to be effective for CO2 sequestration.
AB - Geothermal energy (Figure 1) is a green renewable energy source that h as potential to provide long-term energy with lower carbon footprint and maintenance costs than other renewable energy. A large portion of the world’s geothermal reserves is in sandstone reservoirs often characterized by quartz grains cemented with clays. Clays form also often the impervious boundary of the reservoir rock, the so-called caprock. Many geothermal reservoirs tend to lose permeability over time during production, therefore techniques are applied to enhance the reservoir quality in terms of fluid permeability. Partial dissolution of sand grains in the reservoir is a possibility to increase porosity and consequently permeability. However, the fluids used for dissolution should have limited reactions with the cementing clay minerals as this would cause collapse of the sandstone grain skeleton reducing permeability. Biodegradable chelating agents (BCA) compared to conventional chemicals (HF and HCl) have little reaction with clay, but can dissolve the sandstone grains; hence greenchemicals could be effective for enhancing reservoir quality. The emission ofdissolved CO2 from geothermal water becomes more of an issue recently.Biodegradable chelating agents could reduce CO2 emission since they offer highchelating capacities on a large variety of minerals including calcium-rich minerals. Calcium has the capacity to bond with CO2, proving to be effective for CO2 sequestration.
KW - geothermal
KW - chelating
KW - clay cap
KW - Reservoir
KW - biodegradable
KW - Permeability
KW - CO2
KW - ITC-GOLD
UR - https://ezproxy2.utwente.nl/login?url=https://library.itc.utwente.nl/login/2019/pres/hack_inf_pos.pdf
M3 - Other
SP - poster
ER -