- 责任者：Zhang Yunfeng (Key Laboratory of Oil and Gas Reservoir Forming Mechanism and Resource Evaluation ; Northeast Petroleum University ; Daqing 163318 ; China) ; Li Yilin
- 刊名：Chinese Journal of Geology
- 出版年：2013
- 卷期：48(3)
- 关键词：低压 ; low pressure ; 砂岩储集层 ; sandstone reservoirs ; 松辽平原 ; Songliao Plain
- 页码：p.870-878
- 图表：7 illus., 1 table, 28 refs.
- 分类号：1003
- issnNo：ISSN0563-5020
- isbnNo：CN11-1937/P
A lot of analysis of cast thin section and SEM show that,underpressure system developed in Shiwu depression in southeast uplift area of Songliao Basin. The type of effective storage spaces of the deep reservoir in Shiwu depression is secondary pore caused by dissolution, porosity can reach about 20% , this is the main reason for the formation of high quality reservoir. Underpressure system of deep reservoir is developed widely, measured formation pressure coefficient ranges between 0.6 and 1.0. The statistic results show that there is a good coupling relationships and genetic relationship between abnormal low pressure and secondary pore in the study area. The formation of abnormal pressure is associated with the uplift and denudation of the end of Denglouku Formation （Kxd）in this area. The formation temperature begin to decrease in this process, the solubility of carbonate cement begin to increase, dissolution enhance, thus the formation of secondary pore. The stronger uplift and denudation is ,the more obvious corrosion effect is in this region.