Decarbonization of oil refineries has taken one of the priorities with the light of the global concerns to mitigate the consequences of climate change. One of the largest parts of greenhouse gas emission by the industry, as the oil refining sector, is heavily pressured to switch to low carbon technologies. With the particular emphasis put on introducing green electricity into the high-temperature processes, this document offers the means of doing so by decarbonizing oil refineries. In the past, this industry has been relying on fossil fuel as energy source in a process, particularly in the processes such as Distillation, cracking as well as reforming where a lot of heat is required. This is a necessary change towards more sustainable energy solutions in the curbing of the level of carbon emissions in the refinery processes. The renewable sources of energy such as solar, wind, and hydrogen have potential of becoming an alternative to the normal fossil fuels. Incorporation of these technologies in the refinery processes not only assists in compliance with tighter environmental standards but also helps the industry prepare for long-term success in a more and more low-carbon economy. There are technical, economic and regulations issues that refineries face in the adaptation of these new technologies but with some government incentives, industry cooperation, and the state of innovation, they should be able to overcome them. Case studies are also included highlighting the success of decarbonization strategy implementations in the refineries around the world. The use of green electricity for lowering emissions from the energy-consuming refining process is emphasized, and the possibility for energy storage and for building a hybrid system, which guarantees stable power supply is mentioned. Addressing both the environmental impacts and the operating requirements, the document presents overall vision of the way refineries of oil can develop the future, which will be more sustainable.