Sauter, Martin

[["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Water Resources Research"],["dc.bibliographiccitation.volume","54"],["dc.contributor.author","Tatomir, A."],["dc.contributor.author","De Vriendt, K."],["dc.contributor.author","Zhou, D."],["dc.contributor.author","Gao, H."],["dc.contributor.author","Duschl, F."],["dc.contributor.author","Sun, F."],["dc.contributor.author","Licha, T."],["dc.contributor.author","Sauter, M."],["dc.date.accessioned","2020-12-10T18:09:24Z"],["dc.date.available","2020-12-10T18:09:24Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1029/2018WR022621"],["dc.identifier.eissn","1944-7973"],["dc.identifier.issn","0043-1397"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73640"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Kinetic Interface Sensitive Tracers: Experimental Validation in a Two‐Phase Flow Column Experiment. A Proof of Concept"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3839"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","ENVIRONMENTAL EARTH SCIENCES"],["dc.bibliographiccitation.lastpage","3853"],["dc.bibliographiccitation.volume","70"],["dc.contributor.author","Lange, Torsten"],["dc.contributor.author","Sauter, Martin"],["dc.contributor.author","Heitfeld, Michael"],["dc.contributor.author","Schetelig, Kurt"],["dc.contributor.author","Brosig, Karolin"],["dc.contributor.author","Jahnke, Wiebke"],["dc.contributor.author","Kissinger, Alexander"],["dc.contributor.author","Helmig, Rainer"],["dc.contributor.author","Ebigbo, Anozie"],["dc.contributor.author","Class, Holger"],["dc.date.accessioned","2018-11-07T09:17:12Z"],["dc.date.available","2018-11-07T09:17:12Z"],["dc.date.issued","2013"],["dc.description.abstract","Hydraulic fracturing of unconventional gas reservoirs rapidly developed especially in the USA to an industrial scale during the last decade. Potential adverse effects such as the deterioration of the quality of exploitable groundwater resources, areal footprints, or even the climate impact were not assessed. Because hydraulic fracturing has already been practised for a long time also in conventional reservoirs, the expansion into the unconventional domain was considered to be just a minor but not a technological step, with potential environmental risks. Thus, safety and environmental protection regulations were not critically developed or refined. Consequently, virtually no baseline conditions were documented before on-site applications as proof of evidence for the net effect of environmental impacts. Not only growing concerns in the general public, but also in the administrations in Germany promoted the commissioning of several expert opinions, evaluating safety, potential risks, and footprints of the technology in focus. The first two publications of the workgroup \"Risks in the Geological System\" of the independent \"Information and Dialogue process on hydraulic fracturing\" (commissioned by ExxonMobil Production Deutschland GmbH) comprises the strategy and approaches to identify and assess the potential risks of groundwater contamination of the exploitable groundwater system in the context of hydraulic fracturing operations in the Munsterland cretaceous basin and the Lower Saxony Basin, Germany. While being specific with respect to local geology and the estimation of effective hydraulic parameters, generalized concepts for the contamination risk assessment were developed. The work focuses on barrier effectiveness of different units of the overburden with respect to the migration of fracking fluids and methane, and considers fault zones as potential fluid pathway structures."],["dc.identifier.doi","10.1007/s12665-013-2803-3"],["dc.identifier.isi","000327457600029"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28105"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1866-6299"],["dc.relation.issn","1866-6280"],["dc.title","Hydraulic fracturing in unconventional gas reservoirs: risks in the geological system part 1"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","610"],["dc.bibliographiccitation.journal","Journal of Hydrology"],["dc.bibliographiccitation.lastpage","619"],["dc.bibliographiccitation.volume","576"],["dc.contributor.author","Haselbeck, Valentin"],["dc.contributor.author","Kordilla, Jannes"],["dc.contributor.author","Krause, Florian"],["dc.contributor.author","Sauter, Martin"],["dc.date.accessioned","2020-12-10T14:25:10Z"],["dc.date.available","2020-12-10T14:25:10Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1016/j.jhydrol.2019.06.053"],["dc.identifier.issn","0022-1694"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72462"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Self-organizing maps for the identification of groundwater salinity sources based on hydrochemical data"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","67"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Geofluids"],["dc.bibliographiccitation.lastpage","81"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","McDermott, C. I."],["dc.contributor.author","Lodemann, M."],["dc.contributor.author","Ghergut, I."],["dc.contributor.author","Tenzer, H."],["dc.contributor.author","Sauter, M."],["dc.contributor.author","Kolditz, O."],["dc.date.accessioned","2018-11-07T10:22:27Z"],["dc.date.available","2018-11-07T10:22:27Z"],["dc.date.issued","2006"],["dc.description.abstract","The German Continental Deep Drilling Program comprising a pilot borehole down to 4000 m and a main borehole down to 9101 m in southeast Germany (KTB) is continuing to provide a unique opportunity for the identification of important factors and processes in deep-seated fluid and energy transfer. In situ stress conditions significantly impact flow, transport and exchange characteristics of fracture networks that dominate the permeability of crystalline reservoir rocks. In this paper, several scales of information are combined to present a fully three-dimensional hydraulic finite element model of the principal KTB fault zones, and linked to a geomechanical model describing the alteration of the hydraulic parameters with stress changes caused by fluid extraction. The concept of geomechanical facies is introduced to define and characterize architectural elements in the subsurface system. Evaluation of a long-term pump test in the KTB pilot hole, June 2002-July 2003, coupled with a geomechanical model gives an insight into some of the elastic and nonelastic processes controlling hydraulic transport in the basement rocks. Trends in the decline of the permeability and the degree of storage in the system could only partially be explained by elastic processes, clearly indicating the importance of nonelastic processes. A number of inelastic processes are suggested as areas for further research."],["dc.identifier.doi","10.1111/j.1468-8123.2006.00129.x"],["dc.identifier.isi","000234840900005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42280"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Blackwell Publishing"],["dc.relation.issn","1468-8115"],["dc.title","Investigation of coupled hydraulic-geomechanical processes at the KTB site: pressure-dependent characteristics of a long-term pump test and elastic interpretation using a geomechanical facies model"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","S0022169421001979"],["dc.bibliographiccitation.firstpage","126150"],["dc.bibliographiccitation.journal","Journal of Hydrology"],["dc.bibliographiccitation.volume","597"],["dc.contributor.author","Gu, Hongbiao"],["dc.contributor.author","Lan, Shuangshuang"],["dc.contributor.author","Zhang, Huang"],["dc.contributor.author","Wang, Mingyuan"],["dc.contributor.author","Chi, Baoming"],["dc.contributor.author","Sauter, Martin"],["dc.date.accessioned","2021-07-05T15:00:18Z"],["dc.date.available","2021-07-05T15:00:18Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1016/j.jhydrol.2021.126150"],["dc.identifier.pii","S0022169421001979"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/87791"],["dc.language.iso","en"],["dc.notes.intern","DOI Import DOI-Import GROB-441"],["dc.relation.issn","0022-1694"],["dc.title","Water level response in wells to dynamic shaking in confined unconsolidated sediments: A laboratory study"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","95"],["dc.bibliographiccitation.issue","1-4"],["dc.bibliographiccitation.journal","Journal of Hydrology"],["dc.bibliographiccitation.lastpage","108"],["dc.bibliographiccitation.volume","297"],["dc.contributor.author","Leven, C."],["dc.contributor.author","Sauter, M."],["dc.contributor.author","Teutsch, G."],["dc.contributor.author","Dietrich, P."],["dc.date.accessioned","2018-11-07T10:46:00Z"],["dc.date.available","2018-11-07T10:46:00Z"],["dc.date.issued","2004"],["dc.description.abstract","In this paper, a study of detailed pneumatic tests at laboratory scale is presented. The study comprises two different test methods, which were conducted on an unsaturated fractured sandstone block of about I m 3 volume. First, a steady-state flow field with constant gas injection pressure and consequently constant gas flow rates was applied to the fractured sandstone block via a vertical borehole. The discharge of the injected gas was measured at the block surface. Second, a constant gas pressure was injected over the borehole and the transient pressure buildup was recorded at the block surface. It was the objective of the study to investigate the effects of the fractured porous system on pneumatic measurements and to provide an insight into processes occurring during flow and pressure buildup in fractured porous media. This is an essential prerequisite for a reliable validation of different modeling approaches, and it can further assist to improve techniques for the determination of the heterogeneity of hydraulic parameters in fractured porous media. The analysis of the distribution of the flow field and the temporal and spatial evolution of pressure buildup during the hydraulic tests shows that the direction and contribution of the flow field is highly depending on the spatial distribution and the characteristics of the fracture network as well as on the position of the observation points with respect to highly conductive structures. Finally, the introduced test methods are suitable tools for the characterization of the heterogeneous nature of fractured porous media and for the interpretation of the effects of the heterogeneous system on hydraulic tests. (C) 2004 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.jhydrol.2004.04.004"],["dc.identifier.isi","000223292300006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/47645"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0022-1694"],["dc.title","Investigation of the effects of fractured porous media on hydraulic tests - an experimental study at laboratory scale using single well methods"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","37"],["dc.bibliographiccitation.journal","Geothermics"],["dc.bibliographiccitation.lastpage","44"],["dc.bibliographiccitation.volume","43"],["dc.contributor.author","Nottebohm, Martin"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Sauter, Martin"],["dc.date.accessioned","2018-11-07T09:08:39Z"],["dc.date.available","2018-11-07T09:08:39Z"],["dc.date.issued","2012"],["dc.description.abstract","This paper describes the first steps in the design of new custom-made tracers for the investigation of thermal characteristics in deep geothermal reservoirs. Based on ester hydrolysis, the influences of different substituents on the reaction kinetics are studied in detail using the analog phenol acetates under the influence of varying pH and temperatures. Furthermore, a 2-ethylbutyl-2-naphthol-6-sulfonic ester is tested in laboratory experiments for its applicability as a practical thermo-sensitive tracer, considering also the influences of brine and rock matrix. The reaction is shown to be strongly thermo-sensitive while the reaction kinetics can be varied by two orders of magnitude by altering the sterical hindrance groups. These changes in the reaction kinetics are found to be predictable by using the results of this work. It has been found that the half-life can be decreased by the factor of three, if the reacting group is sterically hindered from one side and by the factor of ten, if the reacting group is hindered from both sides. Also mesomeric and inductive effects of substituents on the aromatic ring have significant effects on reaction rates. The pH-dependency on the reaction speed could be quantified and it is shown that the reaction complete alkaline catalyzed. Therefore, this reaction fulfills the many considerations of a tracer-test, such as varying absolute temperature, test durations, and temperature gradients. (C) 2012 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.geothermics.2012.02.002"],["dc.identifier.isi","000306050800004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26081"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0375-6505"],["dc.title","Tracer design for tracking thermal fronts in geothermal reservoirs"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","33"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Journal of Hydrology"],["dc.bibliographiccitation.lastpage","45"],["dc.bibliographiccitation.volume","384"],["dc.contributor.author","Brauchler, R."],["dc.contributor.author","Hu, R."],["dc.contributor.author","Vogt, T."],["dc.contributor.author","Al-Halbouni, D."],["dc.contributor.author","Heinrich, Steffen"],["dc.contributor.author","Ptak, Thomas"],["dc.contributor.author","Sauter, M."],["dc.date.accessioned","2018-11-07T08:44:03Z"],["dc.date.available","2018-11-07T08:44:03Z"],["dc.date.issued","2010"],["dc.description.abstract","In this study the potential of cross-well slug interference tests for high resolution aquifer characterization of hydraulic heterogeneity was assessed. The cross-well slug interference tests were performed at the research site \"Stegemuhle\", located in the Leine River valley near Gottingen, Germany. The geological composition of the subsurface, consisting mainly of 3.5 m silt and clay overlying 2.5 m sand and gravel, was determined by geophysical well logging and bore core data. To account for lateral changes a refraction seismic survey was conducted. Based on these data an area, characterized by an aquifer thickness of approximately 2 m and an average hydraulic conductivity of 5.0 x 10(-4) m/s (determined by pumping tests), most appropriate for cross-well slug interference tests, was chosen. Altogether 196 cross-well slug interference tests were performed using a tomographic measurement array. The cross-well slug interference tests were evaluated using type curve analysis, which provided detailed information concerning the vertical changes of hydraulic conductivity and specific storage. To assess hydraulic strata connectivity a travel time based tomographic inversion approach was utilized. The potential of the inversion approach to determine lateral changes could be successfully demonstrated by the reconstruction of the pinch out of a high diffusivity layer close to the bottom of the aquifer. The results demonstrate that the combined evaluation of cross-well slug interference tests based on type curve analysis and travel time inversion allows for the development of a detailed model about subsurface hydraulic heterogeneity. (C) 2010 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","German Research Foundation [BF3379/1-2]"],["dc.identifier.doi","10.1016/j.jhydrol.2010.01.004"],["dc.identifier.isi","000276444700004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20118"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0022-1694"],["dc.title","Cross-well slug interference tests: An effective characterization method for resolving aquifer heterogeneity"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3"],["dc.bibliographiccitation.journal","International Journal of Greenhouse Gas Control"],["dc.bibliographiccitation.lastpage","23"],["dc.bibliographiccitation.volume","48"],["dc.contributor.author","Niemi, Auli"],["dc.contributor.author","Bensabat, Jacob"],["dc.contributor.author","Shtivelman, Vladimir"],["dc.contributor.author","Edlmann, Katriona"],["dc.contributor.author","Gouze, Philippe"],["dc.contributor.author","Luquot, Linda"],["dc.contributor.author","Hingerl, Ferdinand"],["dc.contributor.author","Benson, Sally M."],["dc.contributor.author","Pezard, Philippe A."],["dc.contributor.author","Rasmusson, Kristina"],["dc.contributor.author","Liang, Tian"],["dc.contributor.author","Fagerlund, Fritjof"],["dc.contributor.author","Gendler, Michael"],["dc.contributor.author","Goldberg, Igor"],["dc.contributor.author","Tatomir, Alexandru"],["dc.contributor.author","Lange, Torsten"],["dc.contributor.author","Sauter, Martin"],["dc.contributor.author","Freifeld, Barry"],["dc.date.accessioned","2018-11-07T10:14:40Z"],["dc.date.available","2018-11-07T10:14:40Z"],["dc.date.issued","2016"],["dc.description.abstract","This paper provides an overview of the site characterization work at the Heletz site, in preparation to scientifically motivated CO2 injection experiments. The outcomes are geological and hydrogeological models with associated medium properties and baseline conditions. The work has consisted on first re-analyzing the existing data base from similar to 40 wells from the previous oil exploration studies, based on which a 3-dimensional structural model was constructed along with first estimates of the properties. The CO2 injection site is located on the saline edges of the Heletz depleted oil field. Two new deep (> 1600 m) wells were drilled within the injection site and from these wells a detailed characterization program was carried out, including coring, core analyses, fluid sampling, geophysical logging, seismic survey, in situ hydraulic testing and measurement of the baseline pressure and temperature. The results are presented and discussed in terms of characteristics of the reservoir and cap-rock, the mineralogy, water composition and other baseline conditions, porosity, permeability, capillary pressure and relative permeability. Special emphasis is given to petrophysical properties of the reservoir and the seal, such as comparing the estimates determined by different methods, looking at their geostatistical distributions as well as changes in them when exposed to CO2. (C) 2016 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.ijggc.2015.12.030"],["dc.identifier.isi","000378004200002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40662"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Sci Ltd"],["dc.relation.issn","1878-0148"],["dc.relation.issn","1750-5836"],["dc.title","Heletz experimental site overview, characterization and data analysis for CO2 injection and geological storage"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","104233"],["dc.bibliographiccitation.journal","International Journal of Rock Mechanics and Mining Sciences"],["dc.bibliographiccitation.volume","128"],["dc.contributor.author","Fraser-Harris, A."],["dc.contributor.author","Lightbody, A."],["dc.contributor.author","Edlmann, K."],["dc.contributor.author","Elphick, S."],["dc.contributor.author","Couples, G.D."],["dc.contributor.author","Sauter, M."],["dc.contributor.author","McDermott, C.I."],["dc.date.accessioned","2021-04-14T08:26:50Z"],["dc.date.available","2021-04-14T08:26:50Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1016/j.ijrmms.2020.104233"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/82090"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.issn","1365-1609"],["dc.title","Sampling and preparation of c.200 mm diameter cylindrical rock samples for geomechanical experiments"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]