The Diagenesis of the 2nd Member Reservoirs of Xujiahe Formation and Its Influence on Reservoirs of Hechuan Area

详细信息   

• 责任者：Du Hongquan (Research Institute of Exploration Southern Company ; SINOPEC ; Chengdu 610041 ; China) ; Zhu Rukai
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2012
• 卷期：31(3)
• 关键词：砂岩储集层 ; sandstone reservoirs ; 成岩作用 ; diagenesis ; 四川盆地 ; Sichuan Basin
• 页码：p.403-411
• 图表：4 illus., 1 table, 20 refs.
• 分类号：1003
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

摘要

///Using the analytical means such as ordinary thin slice, cast thin slice, scanning electron microscope and X-diffraction, the authors conducted researches on the characteristics of petrology, diagenesis and pore evolution of the 2nd Member sandstone reservoirs of Xujiahe Formation in Hechuan area, and the result indicates that the sandstone reservoirs are mainly composed of feldspar lithic sandstone and lithic sandstone, which have mainly experienced compaction, cementation, dissolution and metasomatism, with the diagenetic phase reaching the middle diagenetic stage B. Controlled by diagenesis and diagenetic phase, there exist many types of reservoir space in the 2nd Member of Xujiahe Formation in Hechuan area： intragranular dissolving pores, intergranular dissolving pores and remnant intergranular pores are well developed, and the induced pores growing belt abnormally appears in the 2nd Member of Xujiahe Formation in Hechuan area, resulting from the corrosion of feldspars and the cutting of grains rich in feldspar.