【摘要】 基于纵贯喀什地区4条地震剖面的精细构造解析,建立了喀什地区新生代褶皱冲断带的构造地质模型,认为该区新生代晚期不仅受南天山造山带南冲挤压的控制,也受到来自西昆仑的北冲推覆作用的影响,从而将喀什地区的冲断构造划分为北部的"南天山前陆冲断系统"(西段可称"阿图什前陆褶皱冲断带")和南部的"西昆仑前陆冲断系统"两部分。通过平衡恢复技术,定量计算了这两部分的最小水平构造缩短量分别为43.7 km和4 km,剖面总的缩短率为50%。综合构造演化序列和保存条件分析,认为北部深层成藏条件较好,优质储层是否发育是钻探成功的关键因素。更多还原

【Abstract】 Based on accurate structural analysis of four seismic profiles across Kashi area in western Tarim Basin,a tectonic model for Cenozoic fold-and-thrust belts in the area was established.The area was controlled by southward thrusting of the Chinese South Tianshan in Late Cenozoic,in addition,the area was influenced by northward thrusting of the West Kunlun mountains.Namely,the Cenozoic fold-and-thrust zone there could be divided into two parts: the northern part attached to the foreland thrusting system of the Chinese South Tianshan,and the southern one to the foreland thrusting system of the West Kunlun mountains.The former was named the Artux foreland fold-and-thrust belt in the paper,which was composed of three rows of main thrusts and related anticlines,and their evolutional process was briefly discussed.By technique of balanced section,the structural shortening was calculated,which was more than 43.7 km in the northern part and 4 km in the southern part respectively,with a total shortening ratio of the profile being fifty percent.To synthesize regional tectonic evolution and reservation conditions,it was thought that the relatively better potentials might be deeper layers in the northern part(the Artux fold-and-thrust belt),and the key factor for oil-gas exploration should be good-quality reservoirs there.更多还原