| Title: |
Hydraulic fracturing using a horizontal drilling technique – status after 1 year
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| Resource Type: |
document --> technical publication --> report
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| Country: |
Denmark
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| Language(s): |
Danish
English
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| Year: |
2006 |
| Availability: |
Environmental project, Miljørapport nr. 1113
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| Author 1/Producer: |
Walsted, Lisbeth
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| Other Authors/Producers: |
Christensen, Ander, G.
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| Author / Producer Type: |
Agency, regulator or other governmental or inter-governmental body
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| Publisher: |
Miljøstyrelsen
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| Publisher City: |
Strandgade 29,
DK-1405 Copenhagen K,
Denmark
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| ISBN: |
87-7052-222-7
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| Format (e.g. PDF): |
PDF
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| Size: (e.g. 20mb) |
124
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EUGRIS Keyword(s): |
Contaminated land-->Remediation options-->In situ treatment technologies
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| Short description: |
A remediation technique called hydraulic fracturing has been initiated to evaluate whether it is cost effective in low permeable moraine clay. After one year of operation, the groundwater hydraulic pressure gradient in the moraine clay has been reversed, so that groundwater within the 'hot-spot' flows towards the horizontal drains.
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| Long description: |
Contamination with chlorobenzene, dichlorobenzene, dichloronitrobenzene and aniline is present to a depth of 5 m´s in moraine clay. The remediation technique employs hydraulic fracturing to increase permeability in the clay allowing remedial pumping of water and soil gas from horizontal drains using a Dual Phase Extraction (DPE) technique. The fractured drain system affects a zone of up 4.5 meter each side of the drains and an overall upward gradient in relation to the primary chalk reservoir below the moraine clay has been produced protecting the groundwater reservoir.
After 14 months of operation 25 kg of contaminants have been removed at an average rate of 0.08 kg/day and operations cost are approx.132 EUR per m³ water.
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Submitted By:
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Dr Jacqueline Falkenberg WhoDoesWhat?
Last update: 26/01/2007
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