下扬子区发育海相上震旦统至上奥陶统烃源岩（大部分已进入过成熟干气阶段，经历过两期生油过程，仍有一定生烃能力）和上石炭统至二叠系烃源岩（其本处于生油晚期阶段）；成岩后生作用大大改善了古生界碳酸盐岩及碎屑岩的储集性能和渗滤性；古生界露头区已发现背斜逾２００个（许多面积大于４０ｋｍ２），预计覆盖区构造型及其它类型圈闭同样很多，具有优越的圈闭条件；广泛分布３套有效区域盖层（下志留统高家边组，上二叠统龙潭组，上白垩统浦口组），以浦口组盖层最重要。下扬子区上震旦统至二叠系的油气显示（油、气和固体沥青）多达４２４处，多赋存于洞、缝，反映该区经历过广泛的成油过程。印支期至燕山期的构造运动对古生界原生油气藏改造相当严重，但构造相对稳定的区块仍有勘探远景，综合分析认为，泰州—泰兴、南通—无锡、句容—南陵、射阳—大丰和无为—望江地区最有勘探前景。图３表２参４（王孝陵摘） In the Lower Yangtze region, the marine Upper Sinian to upper Ordovician source rocks (most of which have gone through mature dry gas stage and experienced two oil generation processes and still have some hydrocarbon generation ability) and the Upper Carboniferous to Permian Source rock (which was in the late stage of oil generation); diagenesis and post-formation play greatly improved the reservoir performance and percolation of Paleozoic carbonate rocks and clastic rocks; the anticline in the Paleozoic outcrop area has been found to have over 200 (Many of which are larger than 40 km2). It is expected that there are also many structural tectonics and other types of traps in the coverage area with excellent trapping conditions. Three sets of effective caprocks (Lower Silurian Gajianbian Formation, Upper Permian Longtan Formation, Upper Cretaceous Pukou Formation), the most important is the Pukou formation. The Upper Sinian to Permian oil and gas displays (oil, gas and solid bitumen) in the Lower Yangtze region are as many as 424, mostly found in caves and seams, reflecting the extensive petroleum formation experienced by the area. The tectonic movement during the Indosinian to Yanshanian period was quite serious for the reconstruction of the Paleozoic primary oil and gas reservoirs. However, there are still exploration prospects for the relatively stable tectonic blocks. According to a comprehensive analysis, Taizhou-Taixing, Nantong-Wuxi, Jurong-Nanling, Yang - Dafeng and Wuwei - Wangjiang most prospecting prospects. Figure 3 Table 2 Senate 4 (Wang Xiaoling pick)