han; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" class=MsoNormal>The Mechanim of Secondary Pores in the Deep-Seated Reservoir of Glutenite Body of Steep Slope Belt in Dongying Sag

• 责任者：Wang Yong (Geoscience Research Institute of Shengli Oilfied Company ; SINOPEC ; Dongying 257015 ; China) ; Zhong Jianhua
• 刊名：Chinese Journal of Geology
• 出版年：2010
• 卷期：45(3)
• 关键词：次生孔隙 ; secondary pore ; 砂岩储集层 ; sandstone reservoirs ; 东营凹陷 ; Dongying Sag
• 页码：p.822-831
• 图表：7 illus., 17 refs.
• 分类号：1003
• issnNo：ISSN0563-5020
• isbnNo：CN11-1937/P

From the analysis of the coreshansi-font-family: ’Times New Roman’">，thin sectionhansi-font-family: ’Times New Roman’">，SEM as well as FMI imaging logging data, there are 2hansi-font-family: ’Times New Roman’">～4 zones of secondary pores in the glutenite body which buried deeper than 3 500 m in the steep slope belt of Dongying sag. The authors think that the leading factors of the secondary porosity of deep reservoirs are tectonic movement and acidic components dissolution, such as feldspar, debris, carbonate and sulfate after our research. The main formation mechanisms arehansi-font-family: ’Times New Roman’">： 1) the dissolution of acidic fluid which produced in the process of the thermal evolution of organic matter; 2) degypsification, dedolomitization and thermochemical sulfate reduction;  3) screen expulsion because of abnormally high pressure in the environment, gypsum rock bring about the expansion of oil generation window, as well as the H⁺ concentration increase caused by salinity difference; and 4) tectonism and synaresis etc.