Effect of Alkaline Diagenetic Environment of Lower Jurassic on Reservoir Property in Kuqa Depression
详细信息
- 责任者：Tang Yangang (Research Institute of Exploration and Development ; Tarim Oilfield Company ; PetroChina ; Korla 841000 ; China) ; Luo Jinhai
- 刊名：Xinjiang Petroleum Geology
- 出版年：2011
- 卷期：32(4)
- 关键词：砂岩储集层 ; sandstone reservoirs ; 库车坳陷 ; Kuqa Depression
- 页码：p.356-358
- 图表：1 illus., 8 refs.
- 分类号：1003
- issnNo：ISSN1001-3873
- isbnNo：CN65-1107/TE
摘要
The quartz and analcime dissolutions in the coarse clastic rocks of Ahe Formation of the Lower Jurassic in Tugeerming anticlinal structural belt in eastern Kuqa Depression suggest that the stronger alkaline diagenetic environment probably exists during its early stage of diagenetic evolution. Calcite cement formed in the alkaline environment holds the original interstice between the clastic grains and strengthens the compactibility-resistance of the clastic rocks. In the late stage, calcite cements are dissolved due to weathering and eluviation, and the original interstices are released and the reservoir property of Ahe Formation becomes better.