Assessing drilling mud and technical fluid contamination in rock core and brine samples intended for microbiological monitoring at the CO2 storage site in Ketzin using fluorescent dye tracers

Wandrey, Maren; Morozova, Daria; Zettlitzer, Michael; Würdemann, Hilke

doi:10.1016/j.ijggc.2010.05.012

Cited by 23 publications

(12 citation statements)

References 21 publications

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“…As commonly observed at wellbores, we assumed the presence of a thin layer of mudcake between the casing and the formation, and a drilling mud invasion in the formation. Following the measurements of Wandrey et al (2010), the thickness of the invaded zone in the reservoir should be less than 0.5 cm. Therefore, we assume the average thickness of the mud-cake and invaded zone to be 3 cm in the reservoir and 2 cm in the cap rock (see Figure 1).…”

Section: O 2 M O N I T O R I N Gmentioning

confidence: 99%

Sensitivity analysis from single-well ERT simulations to image CO₂ migrations along wellbores

et al. 2013

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CO2 plume imaging is a required step in CO2 geological storage for both performance assessment and risk management purposes. This work has been performed in the frame of the CO2CARE project, and its aim is to develop tools and methodologies to monitor CO2 migration and verify the long-term well integrity after site abandonment. The timely detection of an anomaly is essential to perform a suitable remediation. For this purpose, downhole tools are permanently installed, but it is important to check the resolution and efficiency of the adopted techniques. In particular, this study investigates the possibility of using electrical resistivity tomography (ERT) to image CO2 migrations around observation boreholes through a sensitivity study.

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Section: O 2 M O N I T O R I N Gmentioning

confidence: 99%

Sensitivity analysis from single-well ERT simulations to image CO₂ migrations along wellbores

et al. 2013

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“…Since many microbiological processes are too complex and/or too slow to be analyzed in situ, laboratory experiments using autoclaves (pressure vessels) have to be used to simulate in situ conditions [23,85,86,134]. Unfortunately, the operative and financial effort to perform such experiments is significant, and only a few laboratory studies were conducted under simulated in situ conditions.…”

Section: Methods To Analyze Microbes In Geo-engineered Systemsmentioning

confidence: 99%

“…Zettlitzer et al [84] described a temporary reduction of the injectivity of one well that was most likely caused by microbial activity. Additionally, laboratory long-term experiments under simulated reservoir P-T conditions (5.5 MPa and 40°C) were carried out [85,86]. The increased microbial activity was boosting mineral precipitation e.g.…”

Section: Examples From a Ccs Pilot Site Co 2 Degasing Sites And Labomentioning

confidence: 99%

10. Microbes in geo-engineered systems: geomicrobiological aspects of CCS and Geothermal Energy Generation

Alawi¹

2014

Microbial Life of the Deep Biosphere

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Brought to you by | Stockholms Universitet Authenticated Download Date | 8/25/15 7:03 AM Moreover, the introduced geo-engineered systems provide interesting insights into the deep biosphere. Carbon Capture and Storage (CCS)In the last decade, CCS was intensively discussed as a transitional step to reduce carbon dioxide emission from coal-fired power plants or industrial plants. Currently 33 CCS facilities are in operation worldwide (21 of which are pilot plants) and another 52 facilities are already planned [28]. The concept of CCS is injecting large amounts of CO 2 for long-term storage in suitable geological formations [1,29,30]. Large volumes of CO 2 can be sequestered in coal beds as well as sedimentary basins, which have a tremendous pore volume, connectivity and appropriate cap rock structures [29][30][31][32]. CO 2 has already been injected into geological formations for several decades for various purposes, including enhanced oil and gas recovery (EOR/EGR). The first commercial example of enhanced oil recovery was Weyburn-Midale (U.S.A./Canada) where between the years 2000 and 2011 nearly 25 million tons of CO 2 were injected [33]. The longest-running CCS-EGR operation in Europe is the Sleipner Gas field off Norway.The worldwide storage potential is dominated by deep saline aquifers, which are porous formations saturated with saline water, thus having no economic or technical use. Another uprising idea is the sequestration of CO 2 in basalts (e.g. CarbFix project in Iceland and the Kevin Dome Large Scale Storage Project in U.S.A.) [34,35]. In particular deep-sea basalts, characterized by seawater-filled pore space and Mg-Ca silicate rocks are adequate [36,37]. In these reservoirs, CO 2 can be fixed by geochemical trapping as stable carbonates. Various reservoir capacities were identified along the eastern ridge flank of the Juan de Fuca plate [38] and other oceanic ridge-flanks [37].In the first step of the CCS chain, the industrially produced carbon dioxide has to be separated from other effluent gases. The type of technology used for the separation determines the degree of purity of the obtained CO 2 and the nature of impurities. Remaining traces of SO 2 and/or NO 2 , for example, which typically derive from oxyfuel combustion plants, can form H 2 SO 4 and HNO 3 upon contact with water, thus possibly accelerating the alteration and corrosion processes in the reservoir and in the injection facilities (pumps, tubings, borehole cements) [39,40].By trapping CO 2 in underground formations, its climate-relevant role as a greenhouse gas can be significantly reduced [31]. Four different mechanisms contribute to the immobilization of CO 2 in the deep underground: structural trapping, residual trapping, solubility trapping, and mineral trapping [1,41], each with a characteristic and site-specific relative importance and time scale. In the short-term, structural and residual trapping generally dominate, whereas solubility and mineral trapping might be only of minor significance due to the slowness of diffusion -th...

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“…During coring of the injection (Ktzi 201) and two monitoring wells (Ktzi 200 and 202), a water-based CaCO 3 / bentonite/organic polymer drill mud, containing carboxymethylcellulose (CMC; Wandrey et al 2010), was used to lubricate the drill bit, transport cuttings to the surface and stabilize and maintain the bottom-hole pressure (Grace 2007). CMC was used because it is a biodegradable organic polymer and does not pollute the subsurface environment.…”

Section: Sample Preparationmentioning

confidence: 99%

Mineralogical and geochemical analysis of Fe-phases in drill-cores from the Triassic Stuttgart Formation at Ketzin CO2 storage site before CO2 arrival

et al. 2017

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Reactive iron (Fe) oxides and sheet silicatebound Fe in reservoir rocks may affect the subsurface storage of CO 2 through several processes by changing the capacity to buffer the acidification by CO 2 and the permeability of the reservoir rock: (1) the reduction of threevalent Fe in anoxic environments can lead to an increase in pH, (2) under sulphidic conditions, Fe may drive sulphur cycling and lead to the formation of pyrite, and (3) the leaching of Fe from sheet silicates may affect silicate diagenesis. In order to evaluate the importance of Fe-reduction on the CO 2 reservoir, we analysed the Fe geochemistry in drill-cores from the Triassic Stuttgart Formation (Schilfsandstein) recovered from the monitoring well at the CO 2 test injection site near Ketzin, Germany.The reservoir rock is a porous, poorly to moderately cohesive fluvial sandstone containing up to 2-4 wt% reactive Fe. Based on a sequential extraction, most Fe falls into the dithionite-extractable Fe-fraction and Fe bound to sheet silicates, whereby some Fe in the dithionite-extractable Fe-fraction may have been leached from illite and smectite. Illite and smectite were detected in core samples by X-ray diffraction and confirmed as the main Fe-containing mineral phases by X-ray absorption spectroscopy. Chlorite is also present, but likely does not contribute much to the high amount of Fe in the silicate-bound fraction. The organic carbon content of the reservoir rock is extremely low (\0.3 wt%), thus likely limiting microbial Fe-reduction or sulphate reduction despite relatively high concentrations of reactive Fe-mineral phases in the reservoir rock and sulphate in the reservoir fluid. Both processes could, however, be fuelled by organic matter that is mobilized by This article is part of a Topical Collection in Environmental Earth Sciences on ''Subsurface Energy storage'', guest-edited by

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Assessing drilling mud and technical fluid contamination in rock core and brine samples intended for microbiological monitoring at the CO2 storage site in Ketzin using fluorescent dye tracers

Cited by 23 publications

References 21 publications

Sensitivity analysis from single-well ERT simulations to image CO₂ migrations along wellbores

Sensitivity analysis from single-well ERT simulations to image CO₂ migrations along wellbores

10. Microbes in geo-engineered systems: geomicrobiological aspects of CCS and Geothermal Energy Generation

Mineralogical and geochemical analysis of Fe-phases in drill-cores from the Triassic Stuttgart Formation at Ketzin CO2 storage site before CO2 arrival

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Assessing drilling mud and technical fluid contamination in rock core and brine samples intended for microbiological monitoring at the CO2 storage site in Ketzin using fluorescent dye tracers

Cited by 23 publications

References 21 publications

Sensitivity analysis from single-well ERT simulations to image CO2 migrations along wellbores

Sensitivity analysis from single-well ERT simulations to image CO2 migrations along wellbores

10. Microbes in geo-engineered systems: geomicrobiological aspects of CCS and Geothermal Energy Generation

Mineralogical and geochemical analysis of Fe-phases in drill-cores from the Triassic Stuttgart Formation at Ketzin CO2 storage site before CO2 arrival

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Sensitivity analysis from single-well ERT simulations to image CO₂ migrations along wellbores

Sensitivity analysis from single-well ERT simulations to image CO₂ migrations along wellbores