Characteristics of Quan-4 Formation Sandstone Diagenetic Sequence and Porosity Evolution in Longxi Area of
详细信息
- 责任者：Lian Chengbo (School of Resources and Environment ; Southwest Petroleum University ; Chengdu 610500 ; China) ; Zhong Jianhua
- 刊名：Journal of Earth Sciences and Environment
- 出版年：2010
- 卷期：32(2)
- 关键词：成岩作用 ; diagenesis ; 砂岩储集层 ; sandstone reservoirs ; 松辽平原 ; Songliao Plain
- 页码：p.155-160
- 图表：9 illus., 23 refs.
- 分类号：1003
- issnNo：ISSN1672-6561
- isbnNo：CN61-1423/P
摘要
Based on core,cast thin section,scanning electron microscope,X-ray diffraction and so on,the characteristics of petrology,types of diagenesis,division of diagenetic stage,diagenetic concordant sequence and porosity evolution in Quan-4 Formation sandstone in Longxi area of Songliao Basin are studied.The results show that the lithology is mainly feldspathic litharenite,and secondly lithic arkose;types of diagenesis are compaction,authigenic quartz cementation,authigenic clay mineral cementation,carbonate cementation,metasomatism and dissolution;the diagenetic stage in Quan-4 Formation is A period mesogenetic stage,and divided into A1 and A2 substages;diagenetic,compaction and cementation decrease the primary pore structure intensively,however dissolution improves it effectively;pore type is changed from reduced intergranular pore into combination of reduced intergranular pore and corrosion intergranular pore gradually because of diagenetic evolution.