Flow occurrence between confined aquifers through improperly plugged boreholes

Avcı, Cem B.

doi:10.1016/0022-1694(92)90197-4

Cited by 31 publications

(19 citation statements)

References 6 publications

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“…Williams and Conger [1990] used geophysical logging, vertical flow measurements, and downhole water sampling to delineate contaminant water-bearing structures and flow quantification in open hole wells. Avci [1992] derived the steady state equations for the flow rate through improperly plugged boreholes between two confined aquifers and the resulting hydraulic head distributions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of flow leakage through abandoned wells and boreholes

Avcı¹

1994

Water Resources Research

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Flow leakage through abandoned wells and improperly plugged boreholes drilled between hydrogeologically separated water‐bearing zones represent potential pathways of contamination. The present study provides an analytical evaluation of the transient flow rate through these artificial conduits and the resulting hydraulic head distributions when (1) artificial gradients are created by an injection well operating in one of the aquifers or (2) natural hydraulic head differences are present between two confined aquifers. The analysis is conducted by solving the groundwater flow equations in the confined aquifers that are coupled by the flow through the well or borehole. A case study was investigated involving contamination leakage through abandoned wells and improperly plugged boreholes caused by the operation of deep waste injection wells.

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Section: Introductionmentioning

confidence: 99%

Evaluation of flow leakage through abandoned wells and boreholes

Avcı¹

1994

Water Resources Research

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“…Boreholes that lack adequate clay (frequently bentonite) or grout plugs to separate aquifers or boreholes screened in several aquifers may provide preferential flow paths for contaminants or crossaquifer flow (Avci 1992, Lacombe et al 1995, Chesnaux et al 2006, Santi et al 2006, Mayo 2010. Minimizing drilling costs is likely to result in selecting a drilling method that does not allow precise logging of the subsoil to determine the depth of aquitards to be plugged.…”

Section: Hydrological Impactsmentioning

confidence: 99%

Underground Thermal Energy Storage: Environmental Risks and Policy Developments in the Netherlands and European Union

Bonte¹,

Stuyfzand²,

Hulsmann³

et al. 2011

E&S

125

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ABSTRACT. We present an overview of the risks that underground thermal energy storage (UTES) can impose on the groundwater system, drinking water production, and the subsurface environment in general. We describe existing policy and licensing arrangements for UTES in the Netherlands, as well as the capability of the current and future Dutch policy and legal framework to minimize or mitigate risks from UTES on groundwater resources. A survey at the European Union member state level indicates that regulation and research on the potential impacts of UTES on groundwater resources and the subsurface environment often lag behind the technological development of and ever-growing demand for this renewable energy source. The lack of a clear and scientifically underpinned risk management strategy implies that potentially unwanted risks might be taken at vulnerable locations such as near well fields used for drinking water production, whereas at other sites, the application of UTES is avoided without proper reasons. This means that the sustainability of UTES as a form of renewable energy is currently not fully understood, and the technology may be compromising the natural resilience of the subsurface environment. We recognize three main issues that should be addressed to secure sustainable application of UTES: Scientific research is required to further elucidate the impacts of UTES on groundwater; cross-sectoral subsurface planning is required to minimize negative conflicts between UTES and other subsurface interests; and EU-wide guidelines and standards are required for quality assurance and control when installing UTES systems.

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“…Boreholes that lack adequate clay (frequently bentonite) or grout plugs to separate aquifers or boreholes screened in several aquifers may provide preferential flow paths for contaminants or cross-aquifer flow (Avci, 1992;Lacombe et al 1995;Chesnaux et al 2006;Santi et al 2006;Mayo, 2010). Boreholes that lack adequate clay (frequently bentonite) or grout plugs to separate aquifers or boreholes screened in several aquifers may provide preferential flow paths for contaminants or cross-aquifer flow (Avci, 1992;Lacombe et al 1995;Chesnaux et al 2006;Santi et al 2006;Mayo, 2010).…”

Section: Hydrological Impactsmentioning

confidence: 99%

Impacts of Shallow Geothermal Energy on Groundwater Quality

Bonte¹

2014

wio

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Flow occurrence between confined aquifers through improperly plugged boreholes

Cited by 31 publications

References 6 publications

Evaluation of flow leakage through abandoned wells and boreholes

Evaluation of flow leakage through abandoned wells and boreholes

Underground Thermal Energy Storage: Environmental Risks and Policy Developments in the Netherlands and European Union

Impacts of Shallow Geothermal Energy on Groundwater Quality

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