Traditional primary recovery relies on natural reservoir pressure, while secondary recovery utilizes water or gas injection to push the oil toward the wellbore. Surfactants, or detergents, are injected to reduce the interfacial tension between the oil droplet and the rock surface.
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By injecting heat into the formation, the viscosity of the bitumen or heavy oil is drastically reduced, allowing it to behave more like a conventional fluid. This process not only lowers the viscosity but also strips the oil of asphaltenes, further improving its mobility.
Steam Flooding and Cyclic Steam Stimulation Steam flooding involves the continuous injection of steam to propagate a steam front through the reservoir, driving the oil toward production wells. Steam injection is the most common approach, where high-pressure steam is pumped into the well to heat the oil and create a steam chamber.
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This method is highly effective in carbonate reservoirs and can recover a substantial portion of the residual oil. The goal is to mobilize the residual oil that remains after conventional extraction methods have reached their economic limit.
More About Enhanced oil recovery
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