塔里木盆地多期改造-晚期定型复合构造与油气战略选区

受关键构造变革期制约，叠合盆地具有分期差异变形特征。从变形角度分析，塔里木盆地可以追溯出5期主要的构造改造作用，即加里东中期、加里东晚期-海西早期、海西晚期、印支-燕山期和喜马拉雅期，并影响塔里木盆地的发展演化历史。通过对塔北、塔中和库车已知油气聚集区解剖表明:古生代多期改造形成的断裂、褶皱、隆升、剥蚀和岩溶作用，对台盆区巨型海相碳酸盐岩古岩溶油气藏的形成具有重要的控制作用；中、新生代多期改造过程，对前陆褶皱-冲断带大规模油气聚集成藏具有重要的控制作用；这些已知油气聚集区带都是在喜马拉雅晚期最终定型的，总体构成多期改造-晚期定型复合构造油气聚集模式。综合分析了塔里木新区分期差异构造变形特征，在此基础上，依据叠合盆地多期改造-晚期定型构造模式，对塔里木新区进行了区块评价和油气战略选区，认为巴楚隆起、麦盖提斜坡和西昆仑山前褶皱-冲断带是近期油气勘探突破的首选地区，塔东地区、塘古巴斯坳陷和阿瓦提断陷具有良好的油气勘探前景。

Poly-Phase Reform-Late-Stage Finalization Composite Tectonics and Strategic Area Selection of Oil and Gas Resources in Tarim Basin,NW China

The superimposed basin is of poly-phase differential structural deformation controlled by key tectonic stages. Five tectonic reform stages, that is mid-Caledonian, Late-Caledonian-Early Hercynian, Late-Hercynian, Indosinian-Yanshanian, and Himalayan, maybe recognized from deformation analysis in the Tarim basin. The development and evolution of the Tarim basin are affected by the main tectonic reform stages. According to the analysis of known oil-gas belts of northern Tarim uplift, mid-Tarim uplift and Kuqa depression, it is indicated that the huge marine carbonate paleo-karst oil-gas pools are controlled by the faulting and folding, uplifting and erosion, and karsting during the period of the Paleozoic tectonic reforms. A large number of hydrocarbon accumulation in the foreland fold-thrust belt are controlled by the Meso-Cenozoic tectonic reforming. All these known hydrocarbon accumulation zones are finalized at the Late-Himalayan movement, forming hydrocarbon accumulation model of the poly-phase reform-late-stage finalization composite tectonics. Analyzing the poly-phase differential structural deformation, an evaluation and strategic selection of oil-gas resources in the new exploration areas of the Tarim basin have been made based on the above-mentioned model. It is proposed that the best new exploration regions are Bachu uplift, Maigaiti slope and foreland fold thrust belt on the west Kunlun Mountain footwall. And the eastern Tarim, Tangubasi depression and Awati fault-depression are of favorable oil-gas exploration prospects.