Global developments in the oil refining industry are related to the ability of the producing countries to raise the level of operational performance of the refineries by increasing the filtering capacities, raising the percentage of hydrogen treatment process capacity and raising the ratio of operations to improve the octane number to the distillation capacity, to diversify production with a variety of goods with high added value, and reach the level Productivity, which meets global environmental standards and enhances its competitiveness in global markets. Achieving this goal collides with a number of environmental, economic and technological difficulties and constraints. In order to discuss these topics, the research was divided into six axes, the first focused on introducing the oil industry and petroleum products. As for the second axis, it dealt with the importance of the oil refining industry, and the third dealt with developments in the oil refining industry in the world, the fourth discussed the operational performance of oil refineries in the world, the fifth reviewed the experience of Saudi Arabia, and the sixth discussed briefly the Chinese experience in the field of the refining industry. The study reached a number of conclusions, the most important of which is that there is a geographical shift in the global oil refining industry in favor of the Asia-Pacific region, and that the total filtering capacity will increase by about 7.8 million b / d during the period 2018-2023, and most of this increase will come from the Asia-Pacific and the Middle East regions, Especially in countries that produce points such as Saudi Arabia, the UAE and Iran, The research recommended the necessity of dealing with the refining industry as a strategic industry, by adopting strategies aimed at producing and exporting high-quality petroleum products that are compatible with international standards.
COMPARATIVE ANALYSIS OF OIL PROCESSING DEPTH BY NELSON INDEX IN DIFFERENT COUNTRIES