Complex sentence: According to the Oil & Gas Journal, as of January 2015, the UAE holds the seventh-largest proven reserves of oil in the world at 97.8 billion barrels, with most reserves located in Abu Dhabi (approximately 94% of the UAE's total).
Split into simpler sentences: According to the Oil & Gas Journal, as of January 2015, the UAE holds the seventh-largest proven reserves of oil in the world at 97.8 billion barrels. Most of these reserves are located in Abu Dhabi (approximately 94% of the UAE's total).