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准噶尔盆地是中国的一个大型含油气盆地,其油气的成因与勘探目标有着密切的关系。根据中地壳低速层(vP≤6.1km/s),乌尔禾沥青的Pb、Sr、Nd同位素组成及太平洋型同位素地球化学资料的分析表明,克拉玛依油田及克拉玛依—乌尔禾断裂带的油气为无机(非生物)成因。过去几十年,在克拉玛依—乌尔禾断裂带至坳陷中心的斜坡带的勘探失败,说明油气可能并不是来自二叠系有机质的有机成因类型。由此提出2个油气勘探目标:①玛纳斯凸起—莫索湾地区;②石西凹陷。
The Junggar Basin is a large-scale petroliferous basin in China. The origin of oil and gas is closely related to the exploration target. Based on the Pb, Sr and Nd isotopic composition of Wuerhe bitumen and the Pacific Isotope geochemical data from the low crust (vP≤6.1km / s), the hydrocarbon in the Karamay and Karamay-Urho fracture zones is Inorganic (abiotic) causes. Over the past few decades, the exploration failure in the slope zone between the Karamay-Urho fracture zone and the center of the depression shows that hydrocarbons may not originate from organic genetic types of Permian organic matter. As a result, two oil and gas exploration targets are proposed: ① Manasi bulge - Mosuo Bay area; ② Shixi sag.