Diagenesis and Its Effect on Dainan Sandstone Reservoir in Zhenwu-Caozhuang Region of Southern Slope of Gaoyou Depression
详细信息
- 责任者：Li Deyong (College of Marine Geosciences ; Ocean University of China ; Qingdao 266100 ; China) ; Zhang Jinliang
- 刊名：Earth Science
- 出版年：2013
- 卷期：38(1)
- 页码：p.130-142
- issnNo：ISSN1000-2383
- isbnNo：CN42-1233/P
摘要
Determination of the effects of diagenesis on Dainan sandstone reservoir in Zhenwu-Caozhuang region can facilitate the prediction of the beneficial oil reservoir.Based on core observation,the diagenetic characteristics of Dainan reservoir has been studied in detail by using case thin section,SEM,mercury penetration,X-ray and buried-thermal history modeling.Dainan sandstone has experienced such processes as the compaction,cementation,dissolution and metasomatism.Authigenetic cement includes clay mineral,ferrum carbonate,quartz,feldspar and anhydrite.Feldspar and fragment have mainly suffered dissolution.Dainan Formation is in the period A of mesodiagenesis.Dainan reservoir quality is mainly controlled by compaction,kaolinite cementation,ferrum carbonate cementation,overgrowth quartz and dissolution.Sandstone reservoirs in which dissolution or kaolinite infill diagenentic lithofacies develop commonly have higher porosity and permeability,while reservoirs developing compact-filling or carbonate cementation diagenentic lithofacies usually have poor physical property.