Lange, Torsten

[["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","3855"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","ENVIRONMENTAL EARTH SCIENCES"],["dc.bibliographiccitation.lastpage","3873"],["dc.bibliographiccitation.volume","70"],["dc.contributor.author","Kissinger, Alexander"],["dc.contributor.author","Helmig, Rainer"],["dc.contributor.author","Ebigbo, Anozie"],["dc.contributor.author","Class, Holger"],["dc.contributor.author","Lange, Torsten"],["dc.contributor.author","Sauter, Martin"],["dc.contributor.author","Heitfeld, Michael"],["dc.contributor.author","Kluenker, Johannes"],["dc.contributor.author","Jahnke, Wiebke"],["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 is a method used for the production of unconventional gas resources. Huge amounts of so-called fracturing fluid (10,000-20,000 m(3)) are injected into a gas reservoir to create fractures in solid rock formations, upon which mobilised methane fills the pore space and the fracturing fluid is withdrawn. Hydraulic fracturing may pose a threat to groundwater resources if fracturing fluid or brine can migrate through fault zones into shallow aquifers. Diffuse methane emissions from the gas reservoir may not only contaminate shallow groundwater aquifers, but also escape into the atmosphere where methane acts as a greenhouse gas. The working group \"Risks in the Geological System\" as part of ExxonMobil's hydrofracking dialogue and information dissemination processes was tasked with the assessment of possible hazards posed by migrating fluids as a result of hydraulic fracturing activities. In this work, several flow paths for fracturing fluid, brine and methane are identified and scenarios are set up to qualitatively estimate under what circumstances these fluids would leak into shallower layers. The parametrisation for potential hydraulic fracturing sites in North Rhine-Westphalia and Lower Saxony (both in Germany) is derived from literature using upper and lower bounds of hydraulic parameters. The results show that a significant fluid migration is only possible if a combination of several conservative assumptions is met by a scenario."],["dc.identifier.doi","10.1007/s12665-013-2578-6"],["dc.identifier.isi","000327457600030"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28106"],["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 2"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]