秋里塔格构造带构造分段特征与油气成藏

综合钻井、探头、地震与非地震等资料，分段解析塔里木盆地库车坳陷秋里塔格构造带的构造样式和地层结构，探讨构造变形的主控因素，进而分析构造分段性对油气成藏的影响。研究发现基层性质，盖层结构和受力状态等都对秋里塔格构造带东西差异变形有一定影响，而构造变形样式主要受盖层结构的控制，盖层中滑脱面组合与展布，滑脱面流变学性质以及灾形地层的横向变化都对构造样式的差异性有影响，导致秋里塔格构造带深、浅层构造纵向叠加，各具独特的分段特征，第三系叠盐层之下的深层油气聚集保存条件优越，受东西差异构造的控制，东部成藏类型为晚期近源快速成藏，西部为长期侧向运聚成藏。图7表2参22

Structural segmentation and reservoir-formation along the Qiulitage anticline belt of Kuche thrust belt, Tarim Basin

The Qiulitage anticline belt lies in the front of the Kuche thrust-and-fold belt along the south piedmont of the Tianshan Mountains. The major controlling factors of structural deformation and the effect of structural segmentation on reservoir formation were investigated based on the combined information of drilling, outcrop, seismic and non seismic. The results suggest that the deformation is controlled by basement, stratigraphy and the stress state. And the deformation style is mainly controlled by the cap structure. The combination, distribution and rheology of detachments as well as the thickness of deformed strata are controlled by stratigraphy varied along the belt, resulting in the superposition of shallow structures over deeper ones. The structural features of the Qiulitage anticline belt control the formation of hydrocarbon reservoirs, causing the quick pool formation in the east since there are close to sources and the accumulation in the west is from flank in a long period of time.