Impact of flow geometry on parameter uncertainties for underdamped slug tests in fractured rocks

Dausse, Amélie; Guihéneuf, Nicolas; Parker, Beth L.

doi:10.1016/j.jhydrol.2020.125567

Cited by 4 publications

(2 citation statements)

References 55 publications

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“…The nonlinear flow significantly affects this response and may be expressed in terms of a squared velocity term. A substantial number of studies (e.g., Dausse et al., 2021; Hommersen et al., 2021; Kabala et al., 1985; Liu et al., 2020; Malama et al., 2011; Malama et al., 2016; McElwee, 2001; McElwee & Zenner, 1998; McGuire & Zlotnik, 1995; Stone & Clarke, 1993) reported such a nonlinear phenomenon for slug test in a high‐conductivity formation. Those studies however mainly focused on investigating the critically damped or underdamped water level response in the wellbore (Wang et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

A Semi‐Analytical Solution for Slug Test by Considering Near‐Well Formation Damage and Nonlinear Flow

Lin

Yeh

2022

Water Resources Research

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This study proposes a new analytical slug test model describing confined flow considering the effects of the formation damage and non‐Darcy flow near the wellbore. The former, primarily caused by drilling fluid invasion, introduces an extra wellbore head loss near the well screen. The latter, mainly resulting from the relatively high‐velocity flow across the gravel‐pack screen, adopts the Forchheimer equation to consider the joint effects of the laminar flow and non‐Darcy flow. The proposed model is nonlinear due to the quadratic term for non‐Darcy flow in the Forchheimer equation. The new solutions for head responses in the well and formation are derived using the Laplace transform method and integration by parts formula. Furthermore, the present solution is applied to estimate the aquifer parameters via analyzing the water level data from field slug tests conducted in the Minnelusa aquifer near Spearfish, South Dakota. We found that the present solution provides very good fit to the field data from tests in fractured aquifers, notably the data exhibits a rapid decline at late times on the normalized head vs. logarithmic time plots.

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Section: Introductionmentioning

confidence: 99%

A Semi‐Analytical Solution for Slug Test by Considering Near‐Well Formation Damage and Nonlinear Flow

Lin

Yeh

2022

Water Resources Research

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“…Well clogging is defined as a decrease in the specific capacity of an extraction well over time [13]. In practice, the service life of an extraction well is limited, particularly by the impact of the clogging process, i.e., clogging of the porous area of the gravel pack, the well screen or, optionally, the part of the geological environment in the closest surroundings of the well screen [14][15][16][17][18][19][20]. The cause combines a physical clogging, i.e., the transport of mobile sedimentary particles due to transport abilities of flowing water, and a chemical-biological one, i.e., oxidative processes resulting in the precipitation of ions dissolved in groundwater.…”

Section: Introductionmentioning

confidence: 99%

INV-FLOW: New Possibilities to Evaluate the Technical Condition and Function of Extraction Wells

Kukačka

Pech

Ficaj

et al. 2022

Water

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The declining supply of available groundwater resources is increasing the importance of extraction wells. To maximize the yield of extraction wells, the operators do not always respect the sustainable use of groundwater resources. These efforts can affect water quality and impact the service life of an extraction well, mainly through the clogging process. As part of the INV-FLOW project, an apparatus for evaluating the functionality of an extraction well by measuring the vertical water flow through its screen and filter was designed and tested. The apparatus consists of two electromagnetic induction flowmeters, two pneumatic seals, and a pump with the possibility of regulation. After an initial laboratory verification of the fundamental concept, the apparatus was successfully tested in real conditions. Two extraction wells, HJ-3 and HJ-4, intended for water supply to an agricultural production plant, were measured at a pilot site in the Czech Republic using the INV-FLOW apparatus. Although the HJ-3 extraction well is at the end of its service life, the HJ-4 extraction well is a newly installed well. In the new extraction well, HJ-4, a high proportion of water flowing through the gravel pack relative to the total pumping flow (93–97%) was measured using the INV-FLOW apparatus at different pumping rates. In the case of the HJ-3 extraction well, screen and filter clogging contributed significantly to the limited water flow through the gravel pack. In the most affected parts of the extraction well (15–20 m b.g.l.), the proportion of water flowing through the gravel pack relative to the total pumping flow ranged from 10 to 20%. The pilot tests confirmed the functionality of the apparatus and the possibility of using it to evaluate the degree of clogging and incrustation of an extraction well. The pilot tests thus demonstrated the usability of the INV-FLOW apparatus. The extraction well operator can assess the level of clogging or incrustation of the extraction well and decide on the need for the rehabilitation of an extraction well, or the termination of its operation.

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Optimization Design of Consolidation Grouting Around High-Pressure Tunnel Considering Non-Darcian Flow Effect

Chen,

He,

Lei

et al. 2024

Rock Mech Rock Eng

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Impact of flow geometry on parameter uncertainties for underdamped slug tests in fractured rocks

Cited by 4 publications

References 55 publications

A Semi‐Analytical Solution for Slug Test by Considering Near‐Well Formation Damage and Nonlinear Flow

A Semi‐Analytical Solution for Slug Test by Considering Near‐Well Formation Damage and Nonlinear Flow

INV-FLOW: New Possibilities to Evaluate the Technical Condition and Function of Extraction Wells

Optimization Design of Consolidation Grouting Around High-Pressure Tunnel Considering Non-Darcian Flow Effect

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