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Based on the drilling, logging, seismic and chemical analysis data, the characteristics of the new Sandaoqiao buried hill structure and reservoir in the northern Shaya uplift of Tarim Basin were discussed. The results show that Sandaoqiao buried hill is a fault block controlled by Late Paleozoic-Early Mesozoic faults; multi faults and fragment structures develop with the NE-SW long axis in Sandaoqiao buried hill, and the overlaying layer is Mesozoic Jurassic-Cretaceous; Sandaoqiao buried hill is made from the bottom crystalline basement of Paleoproterozoic granites, the middle mixed sediment strata of littoral-neritic facies terrigenous clastic-carbonate rocks, and the upper Neoproterozoic Akesu Group; the mixed sediment strata of littoral-neritic facies terrigenous clastic-carbonate rocks experience burial diagenetic transformation, and the thickness is 700-800 m; the gas reservoir lithology of Sandaoqiao buried hill is crystal powder dolomite and putty crystal dolomite with the poor physical property of matrix, and the reservoir space is fracture and dissolution pore; the high quality reservoir is mainly controlled by the late fracture and karst process. It is further proved that the fracture and karst process of buried hill develop in the northern Shaya uplift of Tarim Basin, and have the advantage on forming high quality reservoir and hydrocarbon accumulation. Therefore, the zone like Sandaoqiao buried hill has great petroleum exploration potential. [ABSTRACT FROM AUTHOR]

依据二维地震剖面的精细地质解释，将塔北沙雅隆起东段自加里东中-晚期以来的断裂活动细分为3期，并对其复合发育过程进行了探讨.研究表明：加里东中-晚期，区内主要发育近NW向的小型逆断层；海西早期，近EW向的压扭断裂开始大规模发育，部分近NW向的断裂也开始扭动，二者呈复合构造样式；海西晚期，区内断裂继承性活动，EW向断裂发生大规模逆冲活动，地层被大幅抬升，并遭受剥蚀.该项研究对于深化塔里木板块北部古生代构造变形研究以及油气勘探等都具有重要的意义.