下扬子地区延伸到中国东部的江苏省。该地区大部分长江三角洲形成的巨大的冲击平原。在冲击平原的下方,厚的晚震旦纪一中三叠纪的海上碳酸盐岩构成了中国南方基本的地下沉积岩区。厚的碳酸盐岩区经过沉积作用后.经历了变形和大量的侵蚀阶段。在中生代与新生代时期,碎屑岩沉积物形成了大陆盆地,过去在该地区进行的大部分石油勘探 The Lower Yangtze extends to Jiangsu Province in eastern China. Most of the Yangtze River Delta in the region formed a huge impact plain. Below the impact plains, the thick Late Sinian-Middle Triassic marine carbonates formed the basic underground sedimentary area in southern China. After the sedimentation of the thick carbonate area, it undergoes deformation and a large number of erosion stages. During the Mesozoic and Cenozoic periods, clastic sediments formed the continental basin, and most of the oil exploration that took place in the area in the past