Analysis on Lower Tertiary Diagenetic Sequence Characteristics and Their Differences of Reservoirs in Dongying Sag

Key words: 
• Dongying sag /
• Lower Tertiary /
• diagenetic facies /
• diagenetic sequence /
• reservoir characteristic /
• differences

Abstract: According to a research on oilgas reservoir diagenetic characteristic and spreading block frame of sequence stratigraphy, the highdegree association was found between diagenetic facies charactertic which was decided by the process of diagenetic evolution and spreading of sequence stratigraphy. The ordinary rule of diagenasis near the boundaries and in the internal of a sequence was introduced in this article. It can be distinguished that the reservoir characteristic was controlled by diagenetic facies and diagenetic sequence. It was thought that some of success of exploration in Lower Tertiary in Dongying Sag was connected with differences of diagenesis. The reasons of oilgas richness was reasonably explained by the study on reservoir characteristic and diagenetic sequence. The results are that oil exploration must provide with specific aim, which was discovered by scientific way. So the best effectiveness would be acquired for exploration.