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中国西部盆地（塔里木、准噶尔、吐哈、柴达木）有古生代海相和中、新生代陆相多种成油体系，克拉通内古隆起及其斜坡和前陆盆地是大中型油气田富集区。侏罗系煤系地层煤、泥岩均能生烃，富油又富气，形成自生自储式油气藏和下生上储的次生气藏。凹陷带强烈沉降，烃源岩厚，油气形成多阶连续。多期构造运动促使西部盆地油气为多次运移、多期成藏及晚期成藏。
In western China basins (Tarim, Junggar, Tuha and Qaidam), there are many oil-forming systems of the Paleozoic marine facies and the Mesozoic and Cenozoic terrestrial facies. The cratonic Neoproterozoic uplift and its slope and foreland basins are enriched in large and medium-sized oil and gas fields Area. Jurassic coal measures stratigraphic coal, mudstone can generate hydrocarbon, rich oil and rich gas, forming a self-storage reservoir and subsurface reservoir. The sag zone is strongly subsided, the source rocks are thick, and the hydrocarbon formation is multi-order continuous. Multi-stage tectonic movement led to multiple migration of oil and gas in the western basin, multi-stage hydrocarbon accumulation and late accumulation.