Geochemical Analysis of a Multi-Layer Hydrocarbon Reservoir in the Wuerhe Area, Junggar Basin

From 5000 m underground to the surface, there is a multi-layer hydrocarbon reservoir under Wuerhe nose uplift in Junggar Basin. Light oil, heavy oil sand, and solid bitumen are found Permian Cretaceous strata. The normal crude present can easily ignored by explorers. To effectively exploit petroleum mineral resources Basin, geochemical characteristics of oils different layers were analyzed. It concluded that minerals came from source rocks alkaline lacustrine facies. Combined with tectonic movement analysis, two stages accumulation occurred research area. During Indosinian Tectonic movement, generated first migrated upwards along large faults then accumulated Permian, Triassic, Jurassic reservoirs. was seriously biodegraded high abundance 25-norhopane detected. At end Yanshan small developed connect Triassic reservoirs surface. light components fault system quickly volatilized left faults. Due plugging effect “bitumen plug”, gas lower part cannot migrate upward be damaged. Therefore, oil-heavy oil–oil sand formed bottom top. result will also have guiding significance for exploration northwest margin