Enhancement of oil recovery by emulsion injection: A pore scale analysis from X-ray micro-tomography measurements
نویسندگان
چکیده
The efficiency of emulsion injection as an enhanced oil recovery (EOR) method is investigated in a synthetic porous medium consisting sintered bi-disperse glass beads, which emulates the porosity and permeability real oil-bearing rocks. Synthetic seawater oil-in-water are successively used to displace mineral initially saturates space. Micro-CT images with 4 ?m resolution acquired at end different stages process; water phase doped KI optimize contrast between liquid phases. Thus, three-dimensional (3D) showing residual present 3-modal histogram. After denoising non-local means filter, alignment segmentation, 3D provide spatial distributions phases, thus allow comparing populations ganglia prior after emulsion. Visual comparison show that droplets oil-water divert path, mobilizing previously trapped ganglia. probability density functions (PDFs) geometrical properties (104 volumes spanning 6 orders magnitude) well defined power law behaviors size corresponding typical pore throat 10 volumes, few very large clusters sizes 5×105 volumes. largest them alone accounts for 97% oil. same PDFs demonstrate successful fragmentation these ganglia, this case key efficient EOR procedure through diversion flow by less permeable regions.
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ژورنال
عنوان ژورنال: Journal of Petroleum Science and Engineering
سال: 2021
ISSN: ['0920-4105', '1873-4715']
DOI: https://doi.org/10.1016/j.petrol.2020.108134