1.College of Earth Sciences, Jilin University, Changchun 130061, China;

2.Jilin Provincial Key Laboratory of Oil Shale and Co-generated Energy Minerals, Changchun 130061, China;

3.Research Institute of Exploration and Development, Daqing Oilfield Co??, Ltd??, Daqing 163712, Heilongjiang, China

 To further reveal the tectonic evolution of Cretaceous in Songliao Basin and determine whether the tectonic subsidence was the controlling factor in the evolution of the sedimentary system for the Nenjiang Formation, the authors have conducted analyses of sedimentary facies, sequence stratigraphy, Milankovitch cycles and burial history by drilling and logging data. Meanwhile, the relationship between tectonic subsidence and sedimentary evo? lution and sequence stratigraphy has been analyzed quantitatively. The results showed that the Nenjiang Formation had three third?order sequences: Sequence I (1st, 2nd, and 3rd sections of Nenjiang Formation) developed TST, HST, and RST, while Sequence II (4th section of Nenjiang Formation) and III (5th section of Nenjiang Forma? tion) developed complete LST, TST, HST, and RST. The Nenjiang Formation was composed of sixteen 405 kyr,ranging from 77.43 Ma to 83.98 Ma, lasting 6. 55 Ma. The subsidence rates of Nenjiang Formation decreased grad? ually with time, and the main controlling factors of the sedimentary evolution and sequence structure of Nenjiang Formation were not the sole tectonic subsidence.