Groundwater in bedrock - Hvaler project. Investigations at Testsite Reffsgård, borehole 1. (Capacity enhancement using EDTA)

dc.contributor.author	Skarphagen, H.
dc.contributor.author	Rohr-Torp, E.
dc.contributor.author	Banks, D.
dc.coverage.spatial	19133 Fredrikstad
dc.date.accessioned	2020-07-15T08:36:14Z
dc.date.available	2020-07-15T08:36:14Z
dc.date.issued	1993
dc.identifier.issn	0800-3416
dc.identifier.uri	https://hdl.handle.net/11250/2666328
dc.description.abstract	A 3\" borehole was drilled to 42 m at Reffsgård, and was found to have a negligible yield (< 0.1 l\/hr). In-sity stress measurement was then carried out, using hydraulic fracturing. Following this, the borehole was test-pumped and a short term yield of 156 l\/hr (24 m drawdown) was recorded. This enhancement was believed to be due to hydraulic fracturing. The borehole was then subjected to simple treatment using the surfactant EDTA, resulting in an apparent further increase to 170 l\/hr (24 m drawdown). This may be due to the EDTA, but it may also have been an artifact of excess head applied during treatment.
dc.language.iso	eng
dc.relation.ispartofseries	NGU-Rapport (93.119)
dc.rights	Navngivelse 4.0 Internasjonal
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/deed.no
dc.subject	BERGGRUNN
dc.subject	GRUNNVANNSBRØNN
dc.subject	GRUNNVANN
dc.title	Groundwater in bedrock - Hvaler project. Investigations at Testsite Reffsgård, borehole 1. (Capacity enhancement using EDTA)
dc.type	Report
dc.description.localcode	33060
dc.source.pagenumber	26

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