Vis enkel innførsel

dc.contributor.authorBirkedal, Knut Arne
dc.contributor.authorHauge, Lars Petter
dc.contributor.authorGraue, Arne
dc.contributor.authorErsland, Geir
dc.date.accessioned2016-06-29T11:26:57Z
dc.date.available2016-06-29T11:26:57Z
dc.date.issued2015-06-08
dc.PublishedEnergies 2015, 8(5):4073-4095eng
dc.identifier.issn1996-1073en_US
dc.identifier.urihttps://hdl.handle.net/1956/12218
dc.description.abstractCO2 injection in hydrate-bearing sediments induces methane (CH4) production while benefitting from CO2 storage, as demonstrated in both core and field scale studies. CH4 hydrates have been formed repeatedly in partially water saturated Bentheim sandstones. Magnetic Resonance Imaging (MRI) and CH4 consumption from pump logs have been used to verify final CH4 hydrate saturation. Gas Chromatography (GC) in combination with a Mass Flow Meter was used to quantify CH4 recovery during CO2 injection. The overall aim has been to study the impact of CO2 in fractured and non-fractured samples to determine the performance of CO2-induced CH4 hydrate production. Previous efforts focused on diffusion-driven exchange from a fracture volume. This approach was limited by gas dilution, where free and produced CH4 reduced the CO2 concentration and subsequent driving force for both diffusion and exchange. This limitation was targeted by performing experiments where CO2 was injected continuously into the spacer volume to maintain a high driving force. To evaluate the effect of diffusion length multi-fractured core samples were used, which demonstrated that length was not the dominating effect on core scale. An additional set of experiments is presented on non-fractured samples, where diffusion-limited transportation was assisted by continuous CO2 injection and CH4 displacement. Loss of permeability was addressed through binary gas (N2/CO2) injection, which regained injectivity and sustained CO2-CH4 exchangeen_US
dc.language.isoengeng
dc.publisherMDPIen_US
dc.rightshis article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license.eng
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/eng
dc.subjectCO2 sequestrationeng
dc.subjectCO2 exchangeeng
dc.subjectgas hydrate productioneng
dc.subjecttemperature effectseng
dc.subjectDiffusioneng
dc.subjectexchange driving forceeng
dc.titleTransport mechanisms for CO2-CH4 exchange and safe CO2 storage in hydrate-bearing sandstoneen_US
dc.typePeer reviewed
dc.typeJournal article
dc.date.updated2016-04-11T08:17:04Z
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright The Author(s).en_US
dc.identifier.doihttps://doi.org/10.3390/en8054073
dc.identifier.cristin1255525
dc.subject.nsiVDP::Teknologi: 500::Miljøteknologi: 610
dc.subject.nsiVDP::Technology: 500::Environmental engineering: 610
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430en_US


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel

his article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license.
Med mindre annet er angitt, så er denne innførselen lisensiert som his article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license.