用户名： 密码： 验证码：
The Tectonic Evolution and Its Controlling Effects on the Development of Ordovician Reservoir in Bachu-Markit Tarim basin
详细信息   
摘要
Basd on the residual thickness map and present buried depth map of different strata interpreted from 2D and 3D seismic data and drilling data, after recovery of erosion amounts of main structural uncomformity surface and strata compaction correction, the paleo-structure, paleogeomorphologic restoration method and basin modeling software are employed to calculate the paleo-buried depth and the thickness of different formations during different tectonic periods. This paper also systematically studies on the tectonic evolution history in Bachu-Markit region, and illustrates tectonic evolution and migration of the Bachu and Hetian ancient uplift. The Ordovician karst reservoir is characterized, and its relation to ancient uplift evolution is discussed. Tectonic evolution model of the development of karst reservoir is established to forecast the favorable distribution area for Ordovician karst reservoir. The results show that Bach-Markit ancient tectonic experienced four stages of tectonic cycle, including Caledonian stage, Hercynian stage, Indosinian-Yanshan stage and Himalayan stage; tectonic appearance is controlled by the changes of regional tectonic stress field of different geologic period, Bachu uplift began to develop in the Early Hercynian and form the prototype of the uplift. Until to the Himalayan it substantially uplifted, and finally came into its present shape. The structural evolution experienced two stages, namely the uplift formation by the stage Hercynian Movement and the strong transformation by the stage Himalayan Movement, but the migration of uplift position is subtle, which appears as the change of uplift scale. However, the Hetian ancient uplift is a large ancient uplift which developed in Caledonian-Hercynian, now appears as a large slope belt named as Markit tilted to the south; The structural evolution experienced three stages, including the formation of embyro during the stage Hercynian Movement and the Continued uplift stage in Himalayan Movement, the settlement burial stage in Middle-Late Hercynian Movement and the tilt transformation and extinction stage during Himalayan Movement. The position of the ancient uplift obviously changed in the plane by moving counterclockwise. Being controlled by the tectonic evolution of Hetian ancient uplift, the Ordovician developed three stages about weathered crust of karst, including the Middle Caledonian, the Late Caledonian and the Early Hercynian, among which karst in Early Hercynian was the most developed; And the region of Yubei, suffered three stages of structural tectonic uplift, was the overlapped area owning three stage of Karst, and therefore is proved to be the most favorable area of the development of the karst reservoir in Bachu-Markit.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址：北京市海淀区学院路29号 邮编：100083

电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700