IMECH-IR  > 非线性力学国家重点实验室
Prediction of permeability and its anisotropy of tight oil reservoir via precise pore-throat tortuosity characterization and "umbrella deconstruction" method
Du SH(杜书恒)
Corresponding AuthorDu, Shuheng(dushuheng@imech.ac.cn)
Source PublicationJOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
2019-07-01
Volume178Pages:1018-1028
ISSN0920-4105
AbstractThis study aimed to investigate the prediction method of permeability and its anisotropy of tight oil reservoir via precise pore-throat tortuosity characterization and "umbrella deconstruction" method combining the approaches of the field emission SEM imaging, high resolution image processing, fine and large-scale mathematical statistics, nonlinear regression and other technical means. In this paper, the authors proposed the new calculation model of pore-throat tortuosity, the absolute permeability and the permeability anisotropy based on the improved deep understanding of reservoir. Results of the prediction on the tight oil reservoir of "YANCHANG" formation in Ordos Basin show that the errors of the new method in this paper are the smallest among the total five methods, respectively 0.023 x 10(-3) mu m(2) and 0.090 x 10(-3)mu m(2); the average values of other four methods were 0.090 x 10(-3) mu m(2) and 0.108 x 10(-3) mu m(2), respectively. The predicted results have higher accordance with the measured results, which proved the practicality of the new method. The samples has the highest permeability at the angle of 0 degrees(180/360 degrees) and the permeability values are equal to 0.25 x 10(-3) mu m(2). Similarly, the sample has the lowest permeability at the angle of 22.5 degrees (202.5 degrees), 90 degrees(270 degrees) and 112.5 degrees(292.5 degrees), the permeability values are all equal to 0.06 x 10(-3) mu m(2). At the same time, the calculation of permeability anisotropy results shows that the anisotropy of tight oil reservoirs is very significant, and the permeability value in one direction is obviously higher than which in other directions. It is concluded that the precise description of pore throat geometry, especially the calculation of pore-throat tortuosity parameter, is one of the most important parameters affecting the prediction accuracy of permeability theoretically. Meanwhile, there are dominant seepage channels, which would play a very important guiding role in the prediction of hydrocarbon accumulation and seepage capacity. The conclusion will provide a more rigorous theoretical basis for the rapid and accurate evaluation of the physical properties of unconventional reservoirs.
KeywordTight oil Permeability Pore-throat tortuosity "Umbrella deconstruction" method
DOI10.1016/j.petrol.2019.03.009
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000466615500086
WOS KeywordPOROUS-MEDIA ; FLOW ; HETEROGENEITY ; SHALE ; SCALE ; MODEL ; ROCK
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Petroleum
Funding Projectopen fund of state key laboratory of oil and gas reservoir geology and exploitation (Chengdu University of Technology)[PLC20190401] ; open fund project of the key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences[KLOR2018-6]
Funding Organizationopen fund of state key laboratory of oil and gas reservoir geology and exploitation (Chengdu University of Technology) ; open fund project of the key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences
Classification一类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79204
Collection非线性力学国家重点实验室
AffiliationChinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Du SH. Prediction of permeability and its anisotropy of tight oil reservoir via precise pore-throat tortuosity characterization and "umbrella deconstruction" method[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2019,178:1018-1028.
APA 杜书恒.(2019).Prediction of permeability and its anisotropy of tight oil reservoir via precise pore-throat tortuosity characterization and "umbrella deconstruction" method.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,178,1018-1028.
MLA 杜书恒."Prediction of permeability and its anisotropy of tight oil reservoir via precise pore-throat tortuosity characterization and "umbrella deconstruction" method".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 178(2019):1018-1028.
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