The Sinian is widely distributed in the northern Tarim basin, covering the whole Tabei uplift and its adjacent areas. Despite its extensive coverage, exploration of the Sinian in this area remains limited. Six exploration wells have been drilled in the northern part of the Tabei uplift targeting this stratum; however, the key questions regarding hydrocarbon accumulation mechanisms and favorable play types remain unresolved. Recent ultra- deep drilling and seismic data interpretation suggest promising hydrocarbon potential within the Sinian in the northern Tarim basin. The region exhibits favorable reservoir- capping conditions, good hydrocarbon shows, a relatively stable tectonic background, and high- quality reservoir facies belts, collectively constructing the main factors for the formation of large- scale gas reservoirs. The Sinian- Cambrian stratigraphic sequence forms a robust reservoir- cap assemblage in the northern Tarim basin. The overlying lower Cambrian Yurtusi Formation exhibits a stable distribution of deep- water shelf facies and basin facies mudstone- marl, serving as both a high- quality hydrocarbon source rock and a stable regional cap layer. Within the Sinian, the Qigebulak Formation displays diverse depositional environments. Dolomites developed within a restricted platform environment in the central and western parts of the northern Tabei uplift. Eastward, towards the Yuqi area, the formation transitions into a platform margin slope zone, situated at the junction of the Akkule sub- uplift and Caohu depression. Ultimately, the facies transitions into basin facies in the easternmost extent, where inner platform dune facies and platform margin reef beach facies constitute the dominant carbonate reservoir types. In the deep- burial transition zone between the Tabei uplift and the Manjia depression, Nanhua- Sinian rifting and subsequent Cambrian intracratonic basin development resulted in the formation of three source rock sets: basin, slope, and shelf sedimentary facies in the Lower Cambrian series and the Sinian- Nanhua System. By integrating the structural characteristics and evolutionary history of the Tabei uplift, several hydrocarbon accumulation models have been proposed. The “North- South Dual Source Model” suggests secondary hydrocarbon accumulations in the Yakra high, a region characterized by faulting and buried- hill belts. The “New (Lower Cambrian) Source, Paleo (Sinian) Reservoir Model” proposes gas accumulations in the Akkule low anticlinal, a buried- hill belt. Finally, the “Paleo (Nanhua and Sinian) Source and Paleo (Sinian) Reservoir, and New (Lower Cambrian) Source and Paleo (Sinian) Reservoir Model” focuses on the platform margin belt. The eastern Yuqi area, specifically the late Sinian platform margin belt, stands out as particularly promising. Its stable structural setting, high- quality reservoir facies, and multiple source rock sets create the ideal conditions for large- scale oil and gas accumulation. The Sinian reef- shoal facies benefited from long- term lateral hydrocarbon supply from paleo- sources and vertical contributions from new sources. These facies- controlled reservoirs, capped by Lower Cambrian mudstone, have the potential to host both early Caledonian oil reservoirs and late Hercycian- Himalayan phase fractured gas reservoirs. Therefore, the eastern Yuqi platform margin belt emerges as a highly favorable exploration zone.