GLOBAL GEOLOGY 2017, 20(2) 80-88 DOI:   10.3969/j.issn.1673-9736.2017.02.02  ISSN: 1673-9736 CN: 22-1371/P

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PubMed
XU Simeng1, PENG Xiaolei1, LIU Na1, LIU Li1, WANG Qingbin2, LIU Xiaojian2, JIN Xiaoyan2
摘要
关键词
Evolution of pore fluid of low porosity and permeability reservoir in Qinnan Sag: a case study of 29-2 structure in Qinhuangdao area
XU Simeng1, PENG Xiaolei1, LIU Na1, LIU Li1, WANG Qingbin2, LIU Xiaojian2, JIN Xiaoyan2
1. College of Earth Sciences, Jilin University, Changchun 130061, China;
2. Tianjin Branch of CNOOC Ltd., Tianjin 300452, China
Abstract:

The southeast depression of Qinnan Sag is a potential oil-gas exploration region in the Bohai Sea area. With the analysis of large quantity of rock thin sections, scanning electron microscope and the physical property data of reservoir, the authors studied the petrological characteristics and the evolution of pore and fluid of sandstone in the deeper strata in 29-2 structure in Qinhuangdao area. The results show that the evolutionary tendency of Paleogene sandstone reservoir porous fluid in research area is changed from alkaline porous fluid to acidic porous fluid, and back to alkaline porous fluid. There are three stages of reservoir porous evolution in Qinhuangdao area, namely sharp decrease in porosity due to mechanical compaction, increase in porosity because of corrosion and dissolution, and remarkable reduction owing to carbonate cementation.

Keywords: Qinnan Sag   Paleogene reservoir   petrological characteristics   evolution   pore fluid  
收稿日期 2016-11-07 修回日期 2016-12-15 网络版发布日期  
DOI: 10.3969/j.issn.1673-9736.2017.02.02
基金项目:

通讯作者: LIU Na, E-mail: liuna0620@yahoo.cn
作者简介:
作者Email: liuna0620@yahoo.cn

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