关键词: 碳酸盐岩, 大裂缝, 微裂缝, 四重介质, 试井模型

Abstract:

The exploration and development of glutenite reservoir in the steep slope zone of fault basin in eastern China becomes more and more important, but the studies on the physical property evolution and influencing factors are relatively weak, which restricts the further exploration of oil and gas. Taking Paleogene glutenite in northern steep slope zone of Dongying Sag as an example, this paper used physical property data from 22 cored wells to obtain the evolution curve of porosity. Based on the data of thin slice, formation water, physical properties and grading analysis,the influencing factors such as formation water salinity, carbonate content, grain diameter and sorting coefficient etc, were analyzed from the aspects of diagenesis and sedimentation, which affects pore evolution of glutenite reservoir. It is found that cementation and dissolution are different in vertical zone, and the features of pore evolution are mainly affected and controlled by the character of formation water. The model of physical property evolution of glutenite in vertical was established. The result is very important for forecasting favorable reservoir and judging diagenetic environment.

Key words:  carbonate rock , fractures, micro-fractures , quadruple-media, well test model