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苏堤构造带位于东海陆架盆地西湖凹陷中央背斜带南部 ,为早期拉张、晚期挤压形成的复合断背斜构造带。西湖凹陷沉积了厚达数千米的碎屑岩系 ,可划分为古新统、始新统和渐新统—中新统 3套成油气岩系。构造带内已钻井 6口 ,钻遇地层为前始新统 ,始新统平湖组 ,渐新统花港组 ,中新统龙井组、玉泉组、柳浪组 ,上新统三潭组和第四系东海群。烃源岩为泥岩和煤 ,泥岩厚度大 ,有机质丰度中等—较高 ,有机质主要为 型干酪根 ;煤的生烃潜量平均值为 319(mg/g)。油气的储集、封盖条件良好。烃源岩生烃高峰期、烃类主要运移期与构造形成期相匹配。已有钻井在残雪、断桥、天外天、春晓等构造获商业性油气流。
The structure of the Sudi structural belt is located in the southern part of the central anticlinal belt of the Xihu Sag of the East China Sea Shelf Basin. It is a composite fractured anticline belt formed by early extension and early extrusion. The West Lake Depression deposited thousands of kilometers thick clastic rocks, can be divided into the Paleozoic, the Eocene and Oligocene - Miocene 3 sets of oil and gas rock series. Six wells have been drilled in the structural belt, and the strata encountered are the Eocene, the Eocene Pinghu Formation, the Oligocene Huagang Formation, the Middle Miocene Longjing Formation, the Yuquan Formation, the Liulang Formation, the Upper Paleolithic San Tan Formation and the Four series of East China Sea. The source rock is mudstone and coal. The mudstone is thick, with medium-high organic matter abundance and mainly organic kerogen. The average hydrocarbon generation potential of coal is 319 (mg / g). Oil and gas storage, sealing conditions are good. During the peak period of hydrocarbon generation, the major hydrocarbon migration period matches the tectonic formation period. Drilling has been in the snow, Broken Bridge, Tin Outer Space, Chunxiao structures such as commercial oil and gas flow.