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Oil charging pore throat threshold and accumulation effectiveness of tight sandstone reservoir using the physical simulation experiments combined with NMR

文献类型：期刊论文

作者Li, Chaozheng3,4,6; Liu, Guangdi3,4; Cao, Zhe2; Sun, Mingliang3,4; You, Yuan1; Liu, Naigui5
刊名JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
出版日期2022
卷号208页码:12
关键词Reservoir type Pore throat threshold Physical simulation experiment Oil charging Accumulation effectiveness
ISSN号0920-4105
DOI10.1016/j.petrol.2021.109338
英文摘要Tight oil as a significant part of unconventional resources is now considered as one of most important alternative resources. Oil accumulation mechanism is still a research focus for the tight oil. Therefore, it is important to study the effectiveness of micro-nano pore system to oil charging and accumulation. Taking the Chang 7 tight sandstone reservoir of the Ordos Basin as an example, the physical simulation experiment of oil charging is applied to study the pore throat threshold of tight sandstone reservoir under the different charging force using the nuclear magnetic resonance (NMR) combined with displacement techniques. The relationship between charging force and pore throat radius threshold (R-th) can be established when combined with the pore throat distribution derived from MICP. In addition, the effectiveness of oil accumulation for the different type tight sandstone reservoir is also discussed. The result shows that the Chang 7 tight sandstone reservoir is divided into four groups based on pore structure and petrophysical property (porosity and permeability). In the physical simulation experiment, the oil saturation growth trend can be roughly divided into three groups: uniform growth model, slow growth-stable model, fast-slow growth model. This result indirectly reflects the heterogeneity of pore structure. There is a power function relationship between the charging force and R(th)( )of oil charging, which can be used to calculate the effective accumulation space and further determine the accumulation effectiveness. The effectiveness of oil accumulation changes with the increase of the charging force: the effective accumulation space increases with the charging force, which causes that the reservoir (usually not including type III) gradually transits from ineffective accumulation to effective accumulation. That is, the charging force coupled with pore throat radius controls oil charging and accumulation. For the Chang 7 tight oil accumulation, the effective pore throat radius threshold of oil charging is about 0.1 mu m and thus only the type I and II1 reservoirs can become the effective tight oil reservoirs, which is the main target of tight oil exploration. This result not only puts insight into the tight oil accumulation mechanism but also plays an important role in the tight oil exploration of Yanchang Formation in the Ordos Basin.
WOS关键词TRIASSIC YANCHANG FORMATION ; ORDOS BASIN ; CONTROLLED POROSIMETRY ; WETTABILITY
资助项目National Natural Science Foundation of China Project[41472114] ; National Natural Science Foundation of China Project[41802151] ; National Science and Technology Major Project[2016ZX05046005]
WOS研究方向Energy & Fuels ; Engineering
语种英语
WOS记录号WOS:000697722400003
出版者ELSEVIER
资助机构National Natural Science Foundation of China Project ; National Natural Science Foundation of China Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Natural Science Foundation of China Project ; National Natural Science Foundation of China Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Natural Science Foundation of China Project ; National Natural Science Foundation of China Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Natural Science Foundation of China Project ; National Natural Science Foundation of China Project ; National Science and Technology Major Project ; National Science and Technology Major Project
源URL[http://ir.iggcas.ac.cn/handle/132A11/102700]  
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Liu, Guangdi
作者单位1.PetroChina Changqing Oilfield Co, Xian 710021, Peoples R China
2.Sinopec Petr Explorat & Prod Res Inst, Beijing 102206, Peoples R China
3.China Univ Petr, Coll Geosci, 18 Fuxue Rd, Beijing 102249, 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
6.PetroChina, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Li, Chaozheng,Liu, Guangdi,Cao, Zhe,et al. Oil charging pore throat threshold and accumulation effectiveness of tight sandstone reservoir using the physical simulation experiments combined with NMR[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2022,208:12.
APA Li, Chaozheng,Liu, Guangdi,Cao, Zhe,Sun, Mingliang,You, Yuan,&Liu, Naigui.(2022).Oil charging pore throat threshold and accumulation effectiveness of tight sandstone reservoir using the physical simulation experiments combined with NMR.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,208,12.
MLA Li, Chaozheng,et al."Oil charging pore throat threshold and accumulation effectiveness of tight sandstone reservoir using the physical simulation experiments combined with NMR".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 208(2022):12.

入库方式： OAI收割

来源：地质与地球物理研究所

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