How ionic composition of formation water can water-wet turn to oil-wet sand stone reservoire ?
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The ionic composition of formation water plays a crucial role in altering the wettability of sandstone reservoirs from water-wet to oil-wet. Studies have shown that the presence of specific ions in the formation water can lead to this wettability alteration. For instance, the influx of NaCl electrolyte was found to modify the wettability of rock formations from oil-wet to water-wet. Additionally, the use of low salinity water and sulfate ions in waterflooding processes has been shown to improve oil recovery by changing the core wettability to a more water-wet state. These findings highlight the significant impact of ionic composition on wettability alteration in sandstone reservoirs, emphasizing the importance of understanding and managing the electrolyte content for enhanced oil recovery.
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10 Dec 2018 | Increased sulfate ion concentration and low salinity water can change the wettability of oil-wet sandstone reservoirs to water-wet, enhancing oil recovery by reducing residual oil saturation and improving displacement efficiency. |
| The ionic composition of formation water can influence the wettability alteration of sandstone reservoirs from water-wet to oil-wet, impacting oil recovery efficiency in enhanced oil recovery processes. | |
Open access•Journal Article 1 Citations | The influx of NaCl electrolyte at 9000 and 11000 ppm concentrations modifies sandstone wettability from oil-wet to water-wet, influenced by anisotropic dielectric properties and electromagnetic field interactions. |
1 Citations | The ionic composition of formation water influences wettability alteration in sandstone reservoirs, transitioning from water-wet to oil-wet due to carboxylic acid adsorption affected by salt ions interactions. |
| Low salinity water with divalent ions like CaCl2 can reverse sandstone wettability from oil-wet to water-wet. MES surfactant and nano-silica in synergy further enhance this wettability alteration. |
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