The Rehabilitation of Monitoring Wells Clogged by Calcite Precipitation and Drilling Mud

Kroening, David Eric; Snipes, D.S.; Brame, Scott; Hodges, Rex A.; Price, V.; Temples, Tom J.

doi:10.1111/j.1745-6592.1996.tb00131.x

Cited by 8 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5) can be used to interpret the conductivity around the wellbore (e.g., Kroening et al 1996). A positive skin factor indicates additional flow resistance near the wellbore, e.g., caused by drilling fluid additives invaded into the aquifer or accumulated fines.…”

Section: Head Losses In the Aquifermentioning

confidence: 99%

Review: Hydraulics of water wells—head losses of individual components

Houben

2015

Hydrogeol J

View full text Add to dashboard Cite

Knowledge about the hydraulics of water wells is important to optimize their energy efficiency. By minimizing head losses around the well, energy consumption and ageing processes can be limited, thereby prolonging the well's service life. The contribution of the individual components to total head loss (drawdown) in the well is analyzed in detail. The single most important contributor to drawdown is commonly the aquifer. Its hydraulic conductivity can only be improved slightly through development. The second most important contributor is the formation of a wellbore skin layer. This occurs if no proper well development was performed after drilling; the layer contains remnants of drilling-fluid additives or mobilized fine aquifer particles. The head loss caused by groundwater flow in the gravel pack, through the screen slots and inside the well, was found to be small. Thus, well development is the most important measure to influence well performance and energy efficiency. For longer operation times and pumped volumes, the energy gains outperform the cost for the development.

show abstract

Section: Head Losses In the Aquifermentioning

confidence: 99%

Review: Hydraulics of water wells—head losses of individual components

Houben

2015

Hydrogeol J

View full text Add to dashboard Cite

show abstract

“…[34] It is well known that injected air removes or ''strips'' CO 2 from aqueous solutions and causes the pH to increase even at the field scale; as a result, carbonates precipitate from the pore water [e.g., Florida Department of Environmental Protection, 2003;URS, 2003;Miller and Roote, 2001;Kroening et al, 1996; U.S. Environmental Protection Agency, 1995; U.S. Department of Energy, 1995]. As noted in section 2.3, the tap water used in our experiment was derived from groundwater and is supersaturated with CO 2 .…”

Section: Chemical Processes: Experimental Analysis Of the Cemented Agmentioning

confidence: 99%

Effects of air injection on flow through porous media: Observations and analyses of laboratory‐scale processes

Dror

Berkowitz

Gorelick

2004

Water Resources Research

View full text Add to dashboard Cite

[1] The effects of air injection on flow through porous media were explored in a series of 1-m and 2-m laboratory flow cells. Our motivation was to examine air barriers as an alternative to hydraulic barriers to inhibit saline intrusion in coastal areas. Steady flow conditions were created in homogeneous and heterogeneous unconsolidated sand systems. Dry air was injected at progressively higher flow rates through a well in the center of each flow cell. Discharge and NaClÀtracer breakthrough data were measured at the outflow reservoir of each cell. In addition, a dye tracer was used to visualize the flow patterns. In all cases, air injection was found to produce stable, low-conductivity barriers that reduced discharge by an order of magnitude or more. Effective hydraulic conductivity values determined from discharge and hydraulic head data showed exponential declines with increased air-injection rates in all cases. Numerical simulation was used to quantify hydraulic conductivity and effective porosity values in the saturated and aerated regions created by air injection, and to study advective flow behavior. Pore-filling cement formed in the air-injection region and was analyzed to determine its composition, mass, and volume. Approximately 60% of the cement consisted of soluble minerals, and 40% was less soluble carbonates. Evaporation and increase in solution pH due to stripping of CO 2 by the injected air were responsible for creating the cement. The cement occupied <10% of the pore space in the sand-cement aggregate. Both the air and mineral pore-fillings dissolved when air injection ceased, indicating that both barriers are temporary. These results serve as a preliminary proof of concept that air-injection barriers might effectively inhibit undesired subsurface flow, such as saline intrusion or contaminated groundwater.

show abstract

“…Clogging phenomena were observed in other contexts. Kroening et al (1996) showed for a mixed waste disposal area located at the Savanah River Site, South California, that the main reason for clogging in monitoring-wells was calcite precipitation. Zengguang et al (2011) demonstrated from hydrodynamical simulations in a radial collecting system of a tailing dam that clogging occurred preferentially around the vertical shafts.…”

Section: Recommendationsmentioning

confidence: 98%

Hydrochemical response of a fractured carbonate aquifer to stress variations: application to leakage detection of the Vouglans arch dam lake (Jura, France)

et al. 2015

View full text Add to dashboard Cite

Leakage detection and the prediction of the behavior of fractured rocks subjected to variations in hydrostatic pressure are important issues in hydropower engineering. Some large water reservoirs are constructed in karstic carbonate areas. In order to understand underground circulation in the limestone/dolomite foundation of the Vouglans dam (Jura, France), groundwater chemistry analysis, according to geological conditions, is used. Statistical analyses (PCA and DFA) are carried out: (1) to accurately characterize the contrast in chemical composition resulting from the interaction between surface and groundwater in a poorly contrasted environment, due to the shared carbonated context, and (2) to reassign individuals into homogeneous groups with respect to the variables studied. PHREEQC is used to determine the potential for the precipitation of secondary minerals from the water chemistry mainly in order to determine the geochemical control of clogging. Three types of hydrodynamic behavior were identified in the sector. The origin and transfer time of inflows vary with respect to seasons. The area of influence of the rapid transit of the lake water varies predominantly in response to changes in the lake water level. The hydrostatic pressure of the water column influences the opening and closing of cracks at the bottom of the dam. Drains intercepting an upstream fissure are highlighted by hydrochemical measurements. Inflows are oversaturated with respect to calcite and are thus likely to precipitate this mineral. Zones with a strong clogging capacity correspond to the zones with slow transit groundwater.

show abstract

The Rehabilitation of Monitoring Wells Clogged by Calcite Precipitation and Drilling Mud

Cited by 8 publications

References 5 publications

Review: Hydraulics of water wells—head losses of individual components

Review: Hydraulics of water wells—head losses of individual components

Effects of air injection on flow through porous media: Observations and analyses of laboratory‐scale processes

Hydrochemical response of a fractured carbonate aquifer to stress variations: application to leakage detection of the Vouglans arch dam lake (Jura, France)

Contact Info

Product

Resources

About