Pre-Caspian Basin is one of the most abundant sedimentary basins of the Central Asia. Source rock of the up-salt layer is poor in the Eastern margin of Pre-Caspian Basin, mainly from the source of the sub-salt layer;KT-Ⅰ and KT-II layer of Carboniferous are good reservoir;Lower Permian salt rock and Lower Carboniferous mudstones are two region-al cap rock,which lower Permian salt layer plays a good effect on sub-salt Reservoirs;there exist unconformity, faults and holes, holes, joints and other hydrocarbon migration chan-nels. The relationship...
