Different Hydrocarbon Accumulation Histories in the Kelasu-Yiqikelike Structural Belt of the Kuqa Foreland Basin   总被引：1，自引：0，他引：1  

WANG Zhaoming  LONG Huashan 《《地质学报》英文版》2010,84(5):1195-1208

<正>The Kuqa foreland basin is an important petroliferous basin where gas predominates.The Kela-2 large natural gas reservoir and the Yinan-2,Dabei-1,Tuzi and Dina-11 gas reservoirs have been discovered in the basin up to the present.Natural gases in the Kelasu district and the Yinan district are generated from different source rocks indicated by methane and ethane carbon isotopes.The former is derived from both Jurassic and Triassic source rocks,while the latter is mainly from the Jurassic. Based on its multistage evolution and superposition and the intense tectonic transformation in the basin,the hydrocarbon charging history can be divided into the early and middle Himalayan hydrocarbon accumulation and the late Himalayan redistribution and re-enrichment.The heavier carbon isotope composition and the high natural gas ratio of C_1/C_(1-4) indicate that the accumulated natural gas in the early Himalayan stage is destroyed and the present trapped natural gas was charged mainly in the middle and late Himalayan stages.Comparison and contrast of the oils produced in the Kelasu and Yinan regions indicate the hydrocarbon charging histories in the above two regions are complex and should be characterized by multistage hydrocarbon migration and accumulation.  相似文献   

库车再生前陆盆地冲断构造楔特征   总被引：60，自引：4，他引：56  

卢华复  贾承造  贾东  陈楚铭  刘志宏  王国强  王胜利 《高校地质学报》2001,7(3):257-271

库车再生前陆盆地冲断构造楔由一系列向南运动的逆冲断层和相关褶皱组成。冲断楔的北部以断层转折褶皱、断层传播褶皱、双重逆冲构造为主。断层楔的前缘发育了很好的滑脱膝折背斜,全为盲断层控制,形成隐蔽式前锋。冲断层的就位从中新世开始,自北向南迁移,前锋的构造形成在第四纪。造成逆冲断层的地壳水平缩短作用速度在中新世较慢,平均为0．355mm/a,上新世中期达0．82mm/a,而到上新世晚期和第四纪速度增大了约一个数量级,达到1．29－3mm/a。  相似文献