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近年来塔里木盆地库车山前带勘探获得巨大成功,推动塔西南山前带勘探掀起新的高潮。实际上,这2个山前带的油气来源、输导模式及控藏关键因素等具有一定差异,塔西南山前带深化勘探要充分重视本身的成藏特点。库车山前带以侏罗系煤系烃源岩供烃为主,三叠系为辅,早期大断裂直接沟通源储,以“斜T”型模式输导为主,高陡逆冲构造紧密叠合,整体控制油气分布,局部构造控制成藏。而塔西南山前带以石炭系—二叠系海相烃源岩供烃为主,侏罗系煤系烃源岩为辅,早期隐伏弯褶大断裂为输导通道,以“仰F”型模式输导为主,双向对冲弯褶构造独立控藏。总体上,塔西南山前带石炭系—二叠系烃源岩、早期隐伏大断裂及完整的弯褶构造圈闭发育区是有利的勘探方向。
In recent years, the exploration of the Kuqa foreland belt in the Tarim Basin has achieved great success, which has promoted the exploration of the pylon in the southwestern part of the Tarim Basin and set off a new upsurge. In fact, there are some differences between the source and the transport modes of the two foreland belts and the key factors controlling Tibet. Deepening exploration in the southwestern Tarim Basin should pay full attention to its own reservoir forming characteristics. The Kuqa piedmont belt was dominated by hydrocarbon from the Jurassic coal measure source rocks, supplemented by Triassic. The early large faults directly communicated with source reservoirs and was mainly transported in “T-T” mode with steeply reversed Rushed closely laminated structure, the overall control of oil and gas distribution, local structure control accumulation. However, the hydrocarbon source rocks of the Carboniferous-Permian marine source rocks are dominated in the southwestern Tarim Basin, while the coal source rocks of the Jurassic series are supplemented. The early buried faults are large fault channels, "Type of mode-based transmission, bidirectional heddles fold structure independent control possession. In general, early Carboniferous-Permian hydrocarbon source rocks in the southwestern Tarim Basin, early buried faults and complete fold-structured traps are favorable prospecting directions.