Thermal Enhanced Oil Recovery (TEOR) is a method used to extract crude oil from underground reservoirs. This technique involves injecting heat into the oil reservoir, which reduces the viscosity of the oil, making it easier to flow. The most common method of TEOR is steam injection, where steam is injected into the reservoir to heat the oil. By increasing the temperature, TEOR can significantly improve oil recovery rates compared to traditional methods. This process is particularly effective in heavy oil fields, where the oil is too thick to flow easily. Overall, TEOR helps maximize the extraction of valuable resources from existing oil fields.