Abstract: Nantianshan orogenic belt and Tabei foreland basin is a pair of structural unit with conjugated and positive-negative dependence on each other, which can be divided into six structural units, including Laerdun deep thrusting zone resulted from basement engulfing, Haerkeshan fold thrusting zone, Kula front imbricate thrusting zone, Baicheng-Yangxia foredeep depression zone, Tabei foreland slope zone and Tazhong front uplift. The evolvement of Nantianshan orogenic belt and Tabei foreland basin controlled together the sedimentary characteristics, deformation feature and structural styles of Tabei foreland basin.Oil and gas resources is rich in Tabei foreland basin, which has favorable reservoir-forming conditions. The distribution of oil and gas ismainly dominated by petroleum system and regional cover. There are four structural zones with oil-gas enrichment, which include Kelasu structural zone, Yiqikelike structural zone, Qiulitage structural zone and Luntai fault-uplift zone, where Kale-2 ultra-large gasfield and other several oil and gas fields are discovered, and the added large oil and gas fields will be discovered.

Key words: basin-mountain coupling, Tabei foreland basin, Nantianshan orogenic belt, structural feature, large oil and gas field