Heterogeneous Features of Quartz Grain Dissolution of Cretaceous Sandstone Reservoir in the Kuqa Depression and Its Major Controlling Factors
详细信息
- 责任者：Han Denglin (Key Laboratory of Exploration Technologies for Oil and Gas Resources of the Ministry of Education ; Yangtze University ; Jingzhou 434023 ; China) ; Li Zhong
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(2)
- 关键词：溶蚀作用 ; dissolution ; 砂岩储集层 ; sandstone reservoirs ; 库车坳陷 ; Kuqa Depression
- 页码：p.256-261
- 图表：6 illus., 27 refs.
- 分类号：1003
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
Taking the Cretaceous Bashijiqike Formation in the Kuqa depression as an example, this study suggests that the dissolution of quartz grain in sandstone reservoirs is extensive, with dissolution occurring mainly in the interior and around the rim of quartz grains. Reservoir in the areas with high value of quartz dissolution pore is not only enriched in analcime cement but characterized with rich illite and poor kaolinite also. The result shows that the planar distribution law of water salinity is in agreement to heterogeneous nature of dissolution of quartz grains, indicating that the salinity of syndepositional formation water is the dominating factor of heterogeneous dissolution of quartz grains.
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