The Influence of Chelating Agents on Clays of the Geothermal Cap Rock: Implications for Enhancing Geothermal Reservoir Quality : poster

Research output: Contribution to conferenceOtherAcademic

2 Downloads (Pure)

Abstract

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 green
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 languageEnglish
Pagesposter
Publication statusPublished - 9 Aug 2019
EventInternational Conference on Energy, Aquatech and Sustainability 2019 - Nelson Mandela African Institute of Science and Technology, Arusha, Tanzania, United Republic of
Duration: 9 Aug 201913 Aug 2019
http://iceas.snu.ac.kr/

Conference

ConferenceInternational Conference on Energy, Aquatech and Sustainability 2019
Abbreviated titleICEAS 2019
CountryTanzania, United Republic of
CityArusha
Period9/08/1913/08/19
Internet address

Fingerprint

Posters
cap rock
chelating agent
Chelating Agents
Chelation
Permeability
Clay
Sandstone
Rocks
Renewable Energy
Minerals
clay
permeability
Geothermal Energy
sandstone
Calcium
Carbon Footprint
Dissolution
Carbon footprint
Geothermal energy

Keywords

  • geothermal
  • chelating
  • clay cap
  • Reservoir
  • biodegradable
  • Permeability
  • CO2
  • ITC-GOLD

Cite this

@conference{835ec5551a004c9096cdd5cfe55006af,
title = "The Influence of Chelating Agents on Clays of the Geothermal Cap Rock: Implications for Enhancing Geothermal Reservoir Quality : poster",
abstract = "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.",
keywords = "geothermal, chelating, clay cap, Reservoir, biodegradable, Permeability, CO2, ITC-GOLD",
author = "Madirisha, {Makungu Marco} and C. Lievens and H.R.G.K. Hack and {van der Meer}, F.D.",
year = "2019",
month = "8",
day = "9",
language = "English",
pages = "poster",
note = "International Conference on Energy, Aquatech and Sustainability 2019, ICEAS 2019 ; Conference date: 09-08-2019 Through 13-08-2019",
url = "http://iceas.snu.ac.kr/",

}

Madirisha, MM, Lievens, C, Hack, HRGK & van der Meer, FD 2019, 'The Influence of Chelating Agents on Clays of the Geothermal Cap Rock: Implications for Enhancing Geothermal Reservoir Quality : poster' International Conference on Energy, Aquatech and Sustainability 2019, Arusha, Tanzania, United Republic of, 9/08/19 - 13/08/19, pp. poster.

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 conferenceOtherAcademic

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 -