|Abstract:Geological structures, tectonic evolution and their relationships with hydrocarbon accumulation are significant factors that restrict the hydrocarbon exploration of the northern tectonic belt in the Kuqa depression, Tarim basin. Based on seismic sections and combined with regional tectonic background, strata characteristic of outcrops and well drilling data, the geological structures, tectonic evolution and deformation features of three tectonic sections (i.e., Tugerming, Dibei-Tuzi and Bashi sections) of northern tectonic belt were analyzed systematically, and the potential exploration fields of northern tectonic belt were discussed on the basis of relationship between tectonic evolution and hydrocarbon accumulation. The results show that the Tugerming section is an anticline controlled by a paleo-uplift and basement-involved faults. The Dibei-Tuzi section and Bashi section both develop deep and shallow deformation systems, where the deep deformation system is a fold belt dominated by basement-involved thrust faults, and the shallow deformation system is relatively a simple fault-fold system. The tectonic activities of Tugerming, Dibei-Tuzi and Bashi sections dated from the Cretaceous-early Paleogene, middle Neogene and late Neogene, respectively, and they are all finalized at the Late Kuqa Period of Neogene-Quaternary. At the Jidike-Kangcun period of Neogene (23~5Ma), the Dibei-Tuzi and Tugerming sections developed paleo-oil reservoirs, while the Bashi section developed oil-bearing belts with large area and low abundance. At the Kuqa period of Neogene (5~2Ma), early formed paleo-oil reservoirs were destroyed, but in some regions they can be preserved, and in the meantime, some natural gas reservoirs or condensate gas reservoirs with various scales formed. At the Xiyu period of Quaternary (2Ma~), previously formed gas reservoirs and residual paleo-oil reservoirs were massively adjusted and transformed, and the current accumulation pattern formed ultimately. The hydrocarbon exploration of Tugerming section should keep away from the denudatted area at the cores of anticlines. The north limb, south limb and west-east plunging crown develop fractured lithological oil-gas reservoirs, porous lithological oil-gas reservoirs and structural- lithological oil-gas reservoirs, respectively. The south Dibei slope of Dibei-Tuzi section is a significant potential field for fractured tight sandstone oil-gas reservoir exploration, and the Yiqikelike oil field is an important practical field for the structural-lithological oil-gas reservoir exploration, while the Dibei-2 well block and the Bashi-1 monocline are the exploration fields with high risks. The Lower-Middle Jurassic of the Kelasu tectonic belt, which is to the south of Bashi section, can be considered as a reserved risking exploration field. The hydrocarbon exploration of the Northern tectonic belt should give priority to Lower-Middle Jurassic, and give consideration to shallow multi target formations, thus broaden hydrocarbon exploration field further.