Characteristics of Pore Evolution and Its Controls of Lower Cretaceous Reservoir in Ying’er Depression, Jiudong Basin
- 责任者：Lü Chengfu (Key Laboratory of Petroleum Resources Research ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Lanzhou 730000 ; China) ; Chen Guojun
- 刊名：Acta Sedimentologica Sinica
- 出版年：2010
- 卷期：28(3)
- 关键词：低渗透储集层 ; low permeability reservoirs ; 酒泉盆地 ; Jiuquan Basin
- 页码：p.556-562
- 图表：6 illus., 1 table, 17 refs.
- 分类号：1003
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
Based on analyses of thin sections, casting thin sections and fluorescence thin sections, X-ray diffraction analyses, SEM observations and mercury porosimetry measurements of the reservoir sandstones, this research shows that the main pore types are the inter-granular dissolved pore and intra-granular dissolved pore of feldspar, siliceous debris, quartz and carbonate cements. Two secondary pore zones are developed in the lower member of Xiagou Formation and the top part of Chijinbao Formation. Sandstones in the study area are characterized by poor sorting, poor roundness and low mineralogical maturity. These are the characteristics of fast accumulation and closure to provenance of the sediments.