Results 211 to 220 of about 4,492 (259)
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Wettability alteration in carbonates
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2003Abstract The chemical interaction between cationic surfactants of the type R-N(CH3)3Br, termed CnTAB, and carboxylates is the key factor in changing the wettability from oil-wet chalk to more water-wet conditions. Oil can then be displaced from the chalk by spontaneous imbibition of water.
Dag C Standnes, Tor Austad
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Wettability Alteration of Calcite by Nonionic Surfactants
Langmuir, 2018The process of selecting an effective surfactant for wettability alteration is dependent on a number of factors, including mineral type, temperature, salinity, and nature of adsorbed oil and ultimately how the molecular structure of the surfactant interacts with all of these.
Soumik Das +4 more
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Nanofluids Alter the Surface Wettability of Solids
Langmuir, 2015We report the results of our studies on the changes in the contact angle and interfacial tension using a nanofluid composed of silica nanoparticles dispersed in water on three different solid substrates: gold (partially hydrophobic), glass (hydrophilic), and a silicon wafer (hydrophilic).
Sangwook, Lim +3 more
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A Review on Wettability Alteration in Carbonate Rocks: Wettability Modifiers
Energy & Fuels, 2019More than half of the global oil reserves are in carbonate reservoirs. Carbonate rocks, however, in most cases tend to be mixed-wet or oil-wet.
Xiao Deng +4 more
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Dynamic Laboratory Wettability Alteration
Energy & Fuels, 2010We present experimental wettability alteration results in originally strongly water-wet, outcrop chalk core plugs using a static and two dynamic aging methods. Dynamic aging with continuous crude oil injection during the entire aging process exhibited greater reduction in water-wetness of the strongly water-wet chalk plugs than static aging without ...
M. A. Fernø +3 more
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Proppant Upgrade by Wettability Alteration
International Petroleum Technology Conference, 2016Abstract Proppant plays a key role in maintaining fracture conductivity during well production. Silica sand is by far the most commonly used proppant due to its low cost and availability. However, some of frac sands, especially Tier 2 sand, are not always satisfactory under formation conditions.
Chuanzhong Wang +4 more
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A Model for Wettability Alteration in Fractured Reservoirs
International Petroleum Technology Conference, 2013Abstract Many of the world's oil reservoirs are naturally fractured. Injected water will flow into this highly permeable network and not sweep the matrix containing most of the oil. Spontaneous imbibition can drive oil into the fractures by capillary forces.
Pål Østebø Andersen +3 more
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Wettability Alteration with Silica Aerogel Nanodispersion
Journal of Dispersion Science and Technology, 2013This work studies the wettability alteration using nanoporous silica aerogels for enhanced oil recovery. Water wet flat glass and outcrop sandstone are used for this aim. Modified silica aerogels are synthesized with cheap water glass as the precursor, and ambient pressure drying method.
H. Bargozin, J. S. Moghaddas
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Wettability Alteration with Weak Acid-Assisted Surfactant Flood
SPE Journal, 2022Summary Oil-wetness and heterogeneity are two key reasons for low oil recovery by waterflooding in carbonate reservoirs. Surfactants have been effective in altering the oil-wet matrix to a more water-wet condition and initiating spontaneous imbibition.
Yue Shi, Fangya Niu, Kishore Mohanty
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A distance-based capillary biosensor using wettability alteration
Lab on a Chip, 2021A visual quantitative distance-based biosensor through capillary action is proposed, which converts the wettability changes caused by the target molecules into a capillary rise height signal without any manufacturing technology.
Yansheng Li +5 more
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