The Diagenesis and the Origin of Abnormal High Porosity Zone in the Deep Clastic Reservoir in Changling Fault Depression
详细信息
- 责任者：Zhang Yunfeng (College of Earth Sciences ; Northeast Petroleum University ; Daqing 163318 ; China) ; Wang Guoqiang
- 刊名：Journal of Jilin University
- 出版年：2011
- 卷期：41(2)
- 关键词：碎屑岩储集层 ; clastic reservoirs ; 松辽平原 ; Songliao Plain
- 页码：p.372-376,454
- 图表：3 illus., 1 table, 18 refs.
- 分类号：1003
- 出版序号：20120341
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
Utilizing the analysis of drilling cores, rock thin section,scanning electron microscope and cathodoluminescence, the deep clastic reservoir petrology, diagenesis and secondary pores’ distribution and genesis in Changling fault depression in the south of Songliao basin are researched. The results show that deep clastic reservoir lithology of Changling Depression is mainly lithic-feldspar sandstone, feldspathic litharenite. Compaction and cementation led to further loss of primary pore, but the dissolution forming secondary porosity plays a significant role to improve the porosity and permeability of the reservoir. There are two abnormal high porosity zones in the vertical section, whose formation is mainly owing to dissolution of organic acids and CO2 acidic water.
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