Why water-wet turn to oil-wet sand stone reservoire ?
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Water-wet sandstone reservoirs can turn oil-wet due to various factors such as the adsorption of hydrocarbon components over time, leading to wettability alteration . Surfactants play a crucial role in enhancing oil recovery by altering wettability through mechanisms like soap adsorption on rock surfaces . The presence of surfactants can change the contact angle between water and surfaces, promoting a shift from oil-wet to water-wet states . Additionally, the ionic composition of formation water influences wettability alteration processes, with interactions between carboxylic acids and salt ions affecting surface adsorption . Studies have shown that wettability significantly impacts fluid distribution and saturation in reservoir rocks, with water-wet conditions favoring higher hydrate saturation compared to oil-wet conditions .
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1 Citations | Water-wet sandstone reservoirs turn oil-wet due to hydrocarbon adsorption on the rock surface during oil migration, altering wettability. Ionic composition of formation water influences this process. |
| The water-wet sandstone reservoir can turn oil-wet due to surfactant adsorption altering wettability, reducing interfacial tension, and enhancing oil recovery, as shown in the study. | |
| Water-wet sandstone reservoirs can turn oil-wet due to soap adsorption, forming carboxylate surfactants. This wettability alteration is crucial for enhanced oil recovery in fractured rocks. | |
| Water-wet sandstone reservoirs can turn oil-wet due to oil invading pore spaces over time, altering wettability through processes influenced by factors like pressure, temperature, and fluid composition. |
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