ArticleACS omega2026
Study of Microscopic Flow Mechanisms of Water Huff-n-Puff Considering Salinity Effects.
Article in ACS omega, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
To address the issues of declining performance over multiple cycles of water huff-n-puff and the unclear microscopic oil-water dynamic behaviors, this study employs microfluidic technology and polydimethylsiloxane (PDMS) chips to simulate reservoir structures. We systematically investigate the effects of key parametersincluding the number of huff-n-puff cycles, injection rate, soaking period, reservoir geometry, and injection water typeon development performance. The experiments compare oil recovery efficiency in high- and low-permeability zones, analyze the characteristics of oil mobilization in individual cycles and throughout the entire process, and identify the dominant controlling factors. The results show that under a salinity of 5000 mg/L, oil recovery increases with more huff-n-puff cycles, but the rate of improvement slows. Higher injection rates and shorter soaking times lead to reduced recovery. Capillary forces play a less significant role in large-pore and wide-fracture structures. Injection water with high salinity (100,000 mg/L, including NaCl and CaCl
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