塔里木盆地西南坳陷苏2构造建模

Modeling of Su-2 Structure in Southwest Depression of Tarim Basin

由于受资料的限制,塔里木盆地西南坳陷苏2构造的构造模型具有多解性,直接影响苏2构造的油气勘探。结合前人研究成果和地质露头、地震、钻井资料,建立起该区带的构造模型,获得以下认识:山前断层为基底卷入断层,断层产状由山前向盆地、由深部向浅部逐渐变缓,泥盆系等较老地层逆冲于苏2背斜之上;苏2构造不但有可能存在下白垩统,而且还可能有侏罗系。

Because of the limitation of information,the Su-2 structural model for southwest depression in Tarim basin is of multiple solutions,which directly affects the exploration potentials of Su-2 structure.Combining with previous research results and geological outcrop,seismic and drilling data,the model for this area is developed,from which the following understandings are obtained： piedmont fault belongs to basement-involved fault,the fault occurrence appears transition from piedmont to basin and from deep to shallow,gradually,the older strata like Devonian system are overlying on Su-2 anticline;the Lower Cretaceous is likely to exist in Su-2 structure,also there possibly exists the Jurassic.