Pore occupancy, relative permeability and flow intermittency measurements using X-ray micro-tomography in a complex carbonate

Abstract:
Abstract We imaged the steady-state flow of brine and decane (oil) at different fractional flows during dual injection in a micro-porous limestone, Estaillades, using X-ray micro-tomography. We applied differential imaging to: (a) distinguish micro-porous regions from macro-pores, and (b) determine fluid pore occupancy in both regions, and relative permeability at a capillary number, Ca\xa0=\xa07.3\u202f×\u202f10−6. The sample porosity was approximately 28%, with 7% in macro-pores and 21% in pores that could not be directly resolved (micro-porosity). Fluid occupancy in micro-porosity was classified into three sub-phases: micro-pore space with oil, micro-pore space with brine, and micro-pores partially filled with oil and brine. Our method indicated an initially higher oil recovery from micro-porosity, consistent with waterflooding in a water-wet rock. The fractional flow and relative permeabilities of the two fluids were obtained from measurements of the pressure differential across the sample and the saturation calculated from the images. The brine saturation and relative permeabilities are impacted by the presence of water-wet micro-porosity which provides additional connectivity to the phases. Furthermore, we find that in addition to brine and decane, a fraction of the macroscopic pore space contains an intermittent phase, which is occupied either by brine or decane during the hour-long scan time. Pore and throat occupancy of oil, brine and intermittent phase were obtained from images at different fractional flows using the generalized pore network extracted from the image of macro-pores. The intermittent phase, where the occupancy fluctuated between oil-filled and brine-filled, was predominantly located in the small and intermediate size pores and throats. Overall, we establish a new experimental methodology to: (i) quantify initial and recovered oil in micro-pores, (ii) characterise intermittent flow, and (iii) measure steady-state relative permeability in carbonates, which is shown to be greatly influenced by micro-porosity.
Author Listing: Ying Gao;Ali Q. Raeini;Martin J. Blunt;Branko Bijeljic
Volume: 129
Pages: 56-69
DOI: 10.1016/J.ADVWATRES.2019.04.007
Language: English
Journal: Advances in Water Resources

ADVANCES IN WATER RESOURCES

ADV WATER RESOUR

影响因子:4.0 是否综述期刊:否 是否OA:否 是否预警:不在预警名单内 发行时间:1977 ISSN:0309-1708 发刊频率:Monthly 收录数据库:SCIE/Scopus收录 出版国家/地区:ENGLAND 出版社:Elsevier Ltd

期刊介绍

Advances in Water Resources provides a forum for the presentation of fundamental scientific advances in the understanding of water resources systems. The scope of Advances in Water Resources includes any combination of theoretical, computational, and experimental approaches used to advance fundamental understanding of surface or subsurface water resources systems or the interaction of these systems with the atmosphere, geosphere, biosphere, and human societies. Manuscripts involving case studies that do not attempt to reach broader conclusions, research on engineering design, applied hydraulics, or water quality and treatment, as well as applications of existing knowledge that do not advance fundamental understanding of hydrological processes, are not appropriate for Advances in Water Resources.Examples of appropriate topical areas that will be considered include the following:• Surface and subsurface hydrology• Hydrometeorology• Environmental fluid dynamics• Ecohydrology and ecohydrodynamics• Multiphase transport phenomena in porous media• Fluid flow and species transport and reaction processes

《水资源进展》提供了一个论坛,介绍在理解水资源系统方面的基本科学进展。水资源进展的范围包括理论、计算和实验方法的任何组合,用于促进对地表或地下水资源系统或这些系统与大气、地圈、生物圈和人类社会的相互作用的基本理解。如果手稿涉及的案例研究没有试图得出更广泛的结论,对工程设计、应用水力学或水质和处理的研究,以及对现有知识的应用没有促进对水文过程的基本理解,则不适用于《水资源进展》。将考虑的适当主题领域的例子包括:·地表和地下水文学·水文气象学·环境流体动力学·生态水文学和生态流体动力学·多孔介质中的多相输运现象·流体流动和物种输运及反应过程

年发文量 147
国人发稿量 35
国人发文占比 23.81%
自引率 7.5%
平均录取率 较易
平均审稿周期 偏慢,8-16周平均10.1周
版面费 US$3620
偏重研究方向 环境科学-水资源
期刊官网 http://www.journals.elsevier.com/advances-in-water-resources/
投稿链接 https://www.editorialmanager.com/ADWR

质量指标占比

研究类文章占比 OA被引用占比 撤稿占比 出版后修正文章占比
98.63% 36.69% 0.00% 0.86%

相关指数

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《2019年中国科学院文献情报中心期刊分区表升级版(试行)》首次将社会科学引文数据库(SSCI)期刊纳入到分区评估中。升级版分区表(试行)设置了包括自然科学和社会科学在内的18个大类学科。基础版和升级版(试行)将过渡共存三年时间,推测在此期间各大高校和科研院所仍可能会以基础版为考核参考标准。 提示:中科院分区官方微信公众号“fenqubiao”仅提供基础版数据查询,暂无升级版数据,请注意区分。

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