Prevention of Wellbore Clogging by Intermittent Abstraction

Beek, Kees Van; Breedveld, Rob; Tas, Martijn; Kollen, René

doi:10.1111/j.1745-6592.2010.01307.x

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…According to MAJKIĆ (2013), carbonate encrustations can be formed not only in limestone environments, but also at wells that tap mineral waters from other lithologic settings, with carbonate concentrations greater than several mass percent, as in the case of the wells at Vranjska Banja, where all the occurrences exhib ited encrustations of carbonate origin. VAN BEEK et al (2010), report similar findings, pointing out the dominant presence of carbonate encrustations in limestone environments. Encrusta tions of various origins, including carbonate, can be found in metamorphic settings and those with intercalations of igneous rocks.…”

Section: Resultssupporting

confidence: 63%

Macroscopic, optical and diffraction assessment of encrustations and SEM analyses of phototrophic microbial mats from wellheads and select zones of emergence of mineral water in Serbia

et al. 2019

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Investigations focusing on wellhead encrustations within select zones of emergence of mineral water, in different hydrogeological provinces, were conducted from 2014 to 2017 in Serbia. They included: well BB-1 in Bogatić (Inner Dinaric Alps of western Serbia), wells LB-4 and LB-5 in Lukovska Banja (Šumadija-Kopaonik-Kosovo Province), and wells VG-2 and VG-3 in Vranjska Banja (Serbian Crystalline Core). The studied occurrences belong to the group of hot mineral waters, with temperatures ranging from 62°C to 93.9°C, and total dissolved solids (TDS) from 600 to 1267 mg/L. They are mildly acidic to mildly alkaline (pH 6.6 -8.0) and their genetic types are HCO 3 --Na + +K + (Bogatić and Lukovska Banja) and SO 4 2-, HCO 3 --Na + +K + (Vranjska Banja). Macroscopic, optical and diffraction assessment revealed that the encrustations comprised calcite and aragonite minerals, along with some local quartz, muscovite, albite and clinochlore. The conclusion was that there was a predominant presence of calcium carbonate in all the occurrences, represented by crystalline calcite grains, characteristically birefractive, and dark, semitranslucent grains in the form of microcrystalline calcite highly stained by iron hydroxides (Bogatić), as well as crystalline calcite with radially developed carbonate -aragonite (Lukovska Banja) and rod-like and filamentous aggregates of aragonite and calcite, highly translucent in places (Vranjska Banja).The texture of the samples exhibits alternating horizontal or wavy carbonate laminae. In Vranjska Banja, they include thin micritic to medium crystalline laminae and laminae composed of aggregates of aragonite needles in the form of bunch. In Bogatić and Lukovska Banja, there are thick micritic and highly porous laminae, 0.025 to 1 mm thick, or interlayers of a coarser crystalline structure. Apart from encrustations, all the occurrences exhibit phototrophic microbial mats, which were analyzed by scanning electron microscopy. The onset and progress of encrustation are primarily influenced by the physical and chemical composition of the mineral water (T, pH, TDS, HCO 3 -, Ca 2+ , CO 2 , etc.), as corroborated by hydrogeochemical modeling software PHREEQC 3.4.0. In addition, phototrophic biofilms might be contributing to the creation and accumulation of minerals in the encrustations.

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Section: Resultssupporting

confidence: 63%