%A Li Ang, Ju Linbo, Zhang Liyan %T Relationship Between Hydrocarbon Accumulation and Paleo-Mesozoic Tectonic Evolution Characteristics of Gucheng Lower Uplift in Tarim Basin %0 Journal Article %D 2018 %J Journal of Jilin University(Earth Science Edition) %R 10.13278/j.cnki.jjuese.20170259 %P 545-555 %V 48 %N 2 %U {http://xuebao.jlu.edu.cn/dxb/CN/abstract/article_10801.shtml} %8 2018-03-26 %X The Gucheng lower uplift is an important exploration area in eastern Tarim basin, and its good prospect has been proved by the success of the Gucheng Well 6, Well 8 and Well 9. Years of exploration practices in Tarim basin show that the faults play an important role on controlling the formation and accumulation of reservoirs, are of great significance for oil and gas discovery. Based on the analysis of geometric characteristics of faults, the authors established the Paleo-Mesozoic fault development pattern based on the 2D-3D seismic data of this area. Based on the Multi-window angle sweep technique, the planar characteristics of the concealed strike-slip faults were identified. The deformation mechanism of the faults in different stages was analyzed systematically. The influence of the tectonic evolution on hydrocarbon accumulation was studied in detail. The study shows that there are seven different tectonic styles in this area, including extensional normal faults, torsional negative flower structure, positive "Y" structure, inverse-"Y" structure, compresso-shear structure, near vertical strike-slip faults, torsional strike-slip positive fault. The faults have three plane development directions, NW, NE and NNE. According to the geometric elements and dynamic characteristics, the faults activity period is divided into Early Caledonian stage, Middle Caledonian, Late Caledonian-Early Hercynian stage, and Indo-Yanshan stage. The Middle Caledonian faults are important channels for the upward migration of oil, gas and the lower fluid through establishing the framework of graben block and horst block structure. The "pinnate" faults zone formed in the Indosinian -Yanshanian were caused by the re-activation of Late Caledonian-early Hercynian faults, which has a strong damaging effect on the reservoirs.