Abstarct: The Moghan sedimentary basin, with an area of over 6000 square kilometers and sediment thickness exceeding 8 kilometers, is one of the important hydrocarbon exploration basins in northwest Iran. The Eocene-Miocene Zivar Formation is one of the potential reservoir rocks in this basin and is the focus of research in this thesis. In this research, the tectonic structure of the region was analyzed using Google Earth and Surfer software, and tectonic lineaments were extracted from satellite images using Landsat 9 and SRTM data. Subsequent analyses with Arc Map and Rock Works revealed that the predominant orientation of the lineaments is east-west, and the Zivar Formation sediments were deposited during the last extensional regime dominating the Moghan basin. Field studies, sampling, and petrography of the Zivar Formation determined that it consists of litharenite sandstones filled with anhydrite cement. Electron microscope studies have shown that hydrocarbons are trapped within these cements, indicating that the cementation occurred after the reservoir was charged with hydrocarbons. Microthermometric studies of Fluid inclusion trapped in the evaporite minerals filling the fractures of the Zivah Formation revealed that these evaporite minerals formed at temperatures between 60-70 degrees Celsius and contain hydrocarbon inclusions with varying fluorescence colors. This indicates the presence of oil with different API gravities. These findings suggest that fractures played a key role in the secondary migration of oil and the charging of oil reservoirs in the Moghan region.