Results 241 to 250 of about 318,902 (287)
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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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Flow Instability Associated With Wettability Alteration
SPE Annual Technical Conference and Exhibition, 2007Abstract Wettability of a reservoir rock can be altered by changing brine composition, e.g., lowering salinity, adding surfactants. Wettability alteration can mobilize stranded oil and enhance oil recovery. Analytical solution for 1D tertiary low salinity flood shows two saturation shocks one of which is associated with an adverse ...
Ila Tripathi, Kishore Mohanty
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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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Surfactant induced reservoir wettability alteration: Recent theoretical and experimental advances in enhanced oil recovery [PDF]
Petroleum Science, 2011 Reservoir wettability plays an important role in various oil recovery processes. The origin and evolution of reservoir wettability were critically reviewed to better understand the complexity of wettability due to interactions in crude oil-brine-rock ...
Huaimin Xu, Baojun Bai, Xinwang Song
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Wettability Alteration in a Tight Oil Reservoir
Energy & Fuels, 2013In fractured reservoirs, the efficiency of water flood is governed by spontaneous imbibition of water into oil-containing matrix blocks. When the matrix is oil-wet or mixed-wet, little oil can be recovered by imbibition. The objective of this work is to identify chemicals that can be added to the injection water that can induce imbibition into an ...
P. Kathel, K. K. Mohanty
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