Origin Mechanism of Tightness from the Third Members of Liushagang Formation Sandstone Reservoir in the Northern Huadong-Bailian Area, Fushan Sag, Northern Bay Basin
详细信息
- 责任者：Xiong Shaoyun (Hangzhou Research Institute of Geology ; PetroChina ; Hangzhou 310023 ; China) ; Huang Ling
- 刊名：Acta Geologica Sinica
- 出版年：2013
- 卷期：87(10)
- 关键词：砂岩储集层 ; sandstone reservoirs ; 致密砂层 ; tight sands ; 北部湾 ; Beibu Gulf
- 页码：p.1624-1633
- 图表：11 illus., 1 table, 27 refs.
- 分类号：1003
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
Fushan Sag is in the Beibuwan Basin is enriched in hydrocarbon.The third member of Liushagang Formation is currently an important reservoir in the northern part of the Huadong-Beilian area.Its reservior lithology contains sandy conglomerate,gravel sandstone and fine sandstone,which consist mainly of lithic sandstone and feldspar lithic sandstone.In petrology,the sandstones are characterized by high composional maturity,high textural maturity and higher cement.Sandstone reservoirs from the third members of Liushagang Formation,which porosity is 8.41%-12.14%and permeability is 0.224×10-3μm2~3.472×10-3μm2,belong to the medium-low porosity and ultra low permeability reservoir.Study demonstrates that mechanical compaction is main cause of tight sandstone reservoir,dissolution in medium diagenesis"A"improved reservoir property.Due to the enclosed diagenetic enviroment,feldspar and debris were not dissoluted completely.Authigenic kaolinite,although low content,can improve reservoir physics effectively,and fill pores along with illite/smectite mixed layer,illite and chlorite.Thus their effect on the reservoir is limited.Precipitation of illite/smectite mixed layer,illite,chlorite,carbonate and phase Ⅱquautz along the fluid channel or pores are the important fators to the tightness of reservoir.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |