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Effects of overpressure on deep sandstone reservoir quality: A case study of the Medium and Lower Jurassic formation in the Shawan Sag, central Junggar Basin, western China

文献类型：期刊论文

作者Xu, Xiaotong1,4; Zhang, Likuan5; Zeng, Lianbo1,4; Li, Chao5; Zhang, Liqiang2; Zeng, Zhiping3; Ren, Xincheng3
刊名GEOENERGY SCIENCE AND ENGINEERING
出版日期2023-11-01
卷号230页码:15
ISSN号2949-8929
关键词Deep sandstone reservoir Reservoir quality Overpressure Compaction heterogeneity Central Junggar basin
DOI10.1016/j.geoen.2023.212203
英文摘要This study focuses on the Medium and Lower Jurassic sandstone reservoir in the Shawan Sag, central Junggar Basin to demonstrate the impacts of overpressure on deep reservoir quality. Based on thin section observation and mineral identification, compaction heterogeneity and different petrofacies were identified by mathematical statistics. The compaction degree and typical cements content of different petrofacies under different overpressure systems were analysed to qualitatively evaluate the heterogeneous influence of overpressure on reservoir quality. The evolution of palaeo-pressure and porosity for typical wells were restored using basin modelling, and then the effects of overpressure on reservoir quality were quantitatively analysed. The results reveal that deep sandstones exhibit compaction heterogeneity owing to petrological properties and calcite cement, resulting in different petrofacies: ductile-rich sandstone, calcite-cement sandstone, and ductile-lean sandstone. Ductile-rich sandstone and calcite-cement sandstone, which were nearly or already tight before the on-set of overpressure, were free from the effects of overpressure. Ductile-lean sandstone maintained better reservoir quality from overpressure. The effects of overpressure were heterogeneous, which were comprehensively controlled by grain size, the content of rigid grains, overpressure strength and the on-set and duration of overpressure. The basin modelling results show differences in grain size and the content of rigid grains for the Medium and Lower Jurassic formation, resulting in varying levels of porosity preservation. The Medium Jurassic formation, whose pressure coefficient is 1.9, shows 1.69% porosity preservation, whereas the Lower Jurassic formation, whose pressure coefficient is 1.3, shows 1.59% porosity preservation. With the development of overpressure, quartz overgrowth was restrained, whereas smectite-illitization and carbonate cements were free from the late overpressure effects. The research results deepen the existing understanding of the formation mechanism of deep effective reservoirs.
WOS关键词ANOMALOUSLY HIGH-POROSITY ; QUARTZ CEMENTATION ; PORE PRESSURE ; SKAGERRAK FORMATION ; COMPACTION CURVE ; YINGGEHAI BASIN ; CENTRAL GRABEN ; FUKANG SAG ; NORTH-SEA ; DIAGENESIS
资助项目National Natural Science Foun-dation of China[42030808] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14010202] ; Program of the Tarim Branch of China National Petroleum Corporation[041021090139]
WOS研究方向Energy & Fuels ; Engineering
语种英语
出版者ELSEVIER
WOS记录号WOS:001049659000001
资助机构National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation ; Program of the Tarim Branch of China National Petroleum Corporation
源URL[http://ir.iggcas.ac.cn/handle/132A11/111389]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Li, Chao
作者单位1.China Univ Petr, Coll Geosci, Beijing 102249, Peoples R China
2.China Univ Petr, Sch Geosci, Qingdao 266555, Peoples R China
3.Shengli Oilfield Co SINOPEC, Res Inst Explorat & Dev, Dongying 257000, Peoples R China
4.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Xiaotong,Zhang, Likuan,Zeng, Lianbo,et al. Effects of overpressure on deep sandstone reservoir quality: A case study of the Medium and Lower Jurassic formation in the Shawan Sag, central Junggar Basin, western China[J]. GEOENERGY SCIENCE AND ENGINEERING,2023,230:15.
APA Xu, Xiaotong.,Zhang, Likuan.,Zeng, Lianbo.,Li, Chao.,Zhang, Liqiang.,...&Ren, Xincheng.(2023).Effects of overpressure on deep sandstone reservoir quality: A case study of the Medium and Lower Jurassic formation in the Shawan Sag, central Junggar Basin, western China.GEOENERGY SCIENCE AND ENGINEERING,230,15.
MLA Xu, Xiaotong,et al."Effects of overpressure on deep sandstone reservoir quality: A case study of the Medium and Lower Jurassic formation in the Shawan Sag, central Junggar Basin, western China".GEOENERGY SCIENCE AND ENGINEERING 230(2023):15.

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来源：地质与地球物理研究所

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