The paleotectonic pattern, lithofacies paleogeographic features, sedimentary evolution and its controlling effects on hydrocarbon accumulation assemblages during the depositional period of the Sinian Dengying Formation in middle-upper Yangtze region were investigated based on outcrops, drilling, log and seismic data. The study shows that, (1) Affected by the breakup of the Rodinia supercontinent, the middle and upper Yangtze areas were in extensional tectonic environment during the depositional period of Dengying Formation. The carbonate platform was structurally differentiated. Intra-platform depressions controlled by syndepositional faults developed, forming a tectonic-paleogeographic pattern of “three platforms with two depressions”. (2) During the depositional period of the first and second members of the Dengying Formation, rimmed platforms and intra-platform fault depressions developed in upper Yangtze area and isolated platform developed in middle Yangtze area, and there was the Xuanhan-Kaijiang ancient land block in eastern Sichuan. The depositional period of the third member of the Dengying Formation is the transformation period of tectonic-paleogeographic pattern, when a set of shallow water shelf sediment rich in mud was deposited due to transgression on the background of the eroded terrain formed in Episode I of Tongwan Movement. The sediment of the fourth member of the Dengying Formation inherited the paleogeographic pattern of the first and second members of the Dengying Formation in general, but the Deyang-Anyue intra-platform fault depression further expanded, and the middle Yangtze platform evolved into two separated platforms. (3) Tectonic-sedimentary differentiation and evolution of carbonate platform in the Sinian gave rise to two types of accumulation assemblages with wide distribution and great exploration potential, which are platform margin and intra-platform.

根据露头，钻探，测井和地震资料，研究了长江中上游震旦系灯影组沉积期的古构造格局，岩相古地理特征，沉积演化及其对油气成藏组合的控制作用。研究表明：（1）灯影组沉积在沉积过程中，受罗迪尼亚超大陆断裂的影响，扬中地区处于伸展构造环境。碳酸盐平台在结构上有所区别。受同沉积断层控制的台内凹陷发育，形成了“三个凹陷两个平台”的构造古地理格局。（2）在灯影组第一，第二段沉积期，扬子上游地区形成有边缘的台地和台内断陷，扬子中部地区形成了孤立的台地，川东有玄汉—开江古陆块。灯影组第三段的沉积期是构造古地理格局的转变期，是由于海侵使海棠沉积形成的一组浅水陆架沉积物因海侵而沉积，形成了侵蚀的背景。运动。灯影组第四段沉积物总体上继承了灯影组第一，第二段的古地理格局，但德阳—安岳台内断层凹陷进一步扩大，扬子中部平台演化为两个分离的平台。 。