The CO&lt;sub&gt;2&lt;/sub&gt;SINK Boreholes for Geological Storage Testing

Prevedel, Bernhard; Wohlgemuth, L.; Henninges, Jan; Krüger, K.; Norden, Ben; Förster, Andrea

doi:10.5194/sd-6-32-2008

Cited by 48 publications

(22 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The green lines indicate the ERT cable and the location of the ERT (electrical resistivity array) sensors (green stars). Sandstone reservoir intervals are shown in yellow (Prevedel et al, 2009). …”

Section: Figmentioning

confidence: 99%

“…A staged cementation program was performed in combination with the application of a newly developed, swellable rubber packer technology and a stage cementation downhole tool. This approach was performed instead of the perforation work inside the final casing at the reservoir face to protect the sensor cables (Prevedel et al, 2009). Fine-mesh filter screens with a mesh size of 1.5 mm were used because the Stuttgart formation was expected to be weakly consolidated.…”

Section: Figmentioning

confidence: 99%

See 1 more Smart Citation

Re-establishment of the proper injectivity of the CO2-injection well Ktzi 201 in Ketzin, Germany

Zettlitzer

Moeller

Morozova

et al. 2010

International Journal of Greenhouse Gas Control

View full text Add to dashboard Cite

The onshore CO 2 -storage site Ketzin consists of one CO 2-injection well and two observation wells. Hydraulic tests revealed permeabilities between 50 and 100 mD for the sandstone rock units. The designated injection well Ktzi 201 showed similar production permeability. After installation of the CO 2 -injection string, an injection test with water yielded a significantly lower injectivity of 0.002 m 3 /d*kPa, while the observation wells showed an injection permeability in the same range as the productivity. Several possible reasons for the severe decline in injectivity are discussed. Acidification of the reservoir interval, injection at high wellhead pressure, controlled mini-fractures and back-production of the well are discussed to remove the plugging material to re-establish the required injectivity of the well. It has been decided to perform a nitrogen lift and analyse the back-produced fluids. Initially during the lift, the backproduced fluids were dark-black. Chemical and XRD analyses proved that the black solids consisted mainly of iron sulphide. Sulphate-reducing bacteria (SRB) were detected in fluid samples with up to 10 6 cells/ml by fluorescent in situ hybridisation (FISH) indicating that the formation of iron sulphide was caused by bacterial activity. Organic compounds within the drilling mud and other technical fluids were likely left during the well completion process, thus providing the energy source for strong proliferation of bacteria. During the lift, the fraction of SRB in the whole bacterial community decreased from approximately 32 % in downhole samples to less than 5 %. The lift of Ktzi 201 succeeded in the full restoration of the well productivity and injectivity. Additionally, the likely energy source of the SRB was largely removed by the lifting, thus ensuring the long-term preservation of the injectivity.2

show abstract

Section: Figmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

Re-establishment of the proper injectivity of the CO2-injection well Ktzi 201 in Ketzin, Germany

Zettlitzer

Moeller

Morozova

et al. 2010

International Journal of Greenhouse Gas Control

View full text Add to dashboard Cite

show abstract

“…During the coring operations in all three wells, KCl/CaCO 3 /carboxymethyl cellulose (CMC) -based drilling mud was used (Prevedel et al, 2008). To preserve the environment, the amount of tracer employed was kept to a low level that still enabled sensitive detection of the drilling mud (1 mg/l, personal communication Y. K. Kharaka, USGS).…”

Section: Fluorescein Labelling Of Drilling Mudmentioning

confidence: 99%

“…Three 750 to 800 m deep vertical wells, Ktzi 200, 201 and 202, were drilled from March to September of 2007. Core sections 89 mm in diameter composed mainly of clay and sandstone (Förster et al, 2009) were recovered from the storage horizon using a wire-line coring system (Prevedel et al, 2009). After well establishment, hydraulic tests (Wiese et al, 2010) and nitrogen lifts were performed.…”

Section: Study Sitementioning

confidence: 99%

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

Morozova

Zettlitzer

et al. 2010

International Journal of Greenhouse Gas Control

View full text Add to dashboard Cite

The CO 2 SINK project in Ketzin represents a field laboratory for the storage of CO 2 in a 650-m deep saline aquifer. The project is accompanied by a microbiological monitoring programme to characterise the composition and activity of the autochthonous microbial community in rock and brine samples and their changes in response to CO 2 storage. A prerequisite of these studies is the acquisition of samples free of contamination from microorganisms and organic and inorganic components. Drilling mud and technical fluids are the main sources of contamination. This study describes the application of the fluorescent dye tracers fluorescein and rhodamine B as contamination controls for rock core and brine samples.

show abstract

“…• Well design, drilling and completion of three smart wells, containing a variety of permanently installed downhole sensors for the continuous monitoring of the CO 2 in the reservoir (Prevedel et al (2008(Prevedel et al ( , 2009Möller et al (2012)). …”

Section: Co 2 Storage and Scientific Program At The Ketzin Pilot Sitementioning

confidence: 99%

Borehole seismic monitoring of CO2 storage within a saline aquifer at Ketzin, Germany

Götz¹,

Giese²,

Schmidt‐Hattenberger³

et al. 2011

Proceedings

View full text Add to dashboard Cite

show abstract

The CO<sub>2</sub>SINK Boreholes for Geological Storage Testing

Abstract: No abstract available. <br><br> doi:<a href="http://dx.doi.org/10.2204/iodp.sd.6.04.2008" target="_blank">10.2204/iodp.sd.6.04.2008</a>

Cited by 48 publications

References 6 publications

Re-establishment of the proper injectivity of the CO2-injection well Ktzi 201 in Ketzin, Germany

Re-establishment of the proper injectivity of the CO2-injection well Ktzi 201 in Ketzin, Germany

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

Borehole seismic monitoring of CO2 storage within a saline aquifer at Ketzin, Germany

Contact Info

Product

Resources

About