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Significance of the secondary pores in perthite for oil storage and flow in tight sandstone reservoir
Du SH(杜书恒); Zhao YP(赵亚溥); Jin J; Kou G; Shi YM; Huang XF(黄先富)
AbstractPerthite is a special type of skeleton mineral in tight oil sandstone which cannot be ignored. However, few attention was paid to the secondary pores in perthite and their contributions in tight oil reservoir. This study reveals the perthite's significance in unconventional oil flow characterizes comprehensively and quantitative) by combining the Field Emission Scanning Electron Microscope (FE-SEM) with high resolution, Energy Dispersive Spectrometer (EDS) analysis, high precision image processing, comprehensive parameters construction and calculation. Typical perthite samples of Chang 7 tight oil reservoir of Ordos basin were selected for this study. Our results demonstrate that the growth of K-feldspar and Na-feldspar in perthite is complementary. The mixing process of the two types of stripes promotes each other rather than inhibiting each other. As to the development of secondary pores of perthite, there are clear differences in the area and number of pores, medium differences in the porosity, radius and perimeter, and small differences in other parameters. The more regular and uniform growth of Na-feldspar, the more likely the perthite is to form regular and normalized secondary pore. At least 56.7% of the secondary pore of perthite contributes to oil flow in the process of oil migration or development, and its scientific significance cannot be ignored. The conclusion could provide the geological basis for the effective development of the unconventional hydrocarbon reservoirs.
KeywordPerthite Tight sandstone K-feldspar Na-feldspar Unconventional oil reservoir
Indexed BySCI ; EI
WOS IDWOS:000498747500011
WOS Research AreaGeosciences, Multidisciplinary
WOS SubjectGeology
Funding OrganizationState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology) [PLC20190401] ; Key Laboratory of Oil and Gas Resources Research, Chinese Academy of Sciences [KLOR2018-6] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China [11702299, 11872363, 51861145314] ; Chinese Academy of Sciences Interdisciplinary Innovation Team Project ; CAS Key Research Program of Frontier Sciences [QYZDJ-SSW-JSC019] ; CAS Strategic Priority Research Program [XDB22040401]
ContributorDu, SH ; Zhao, YP (reprint author)
Citation statistics
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
2.Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Sichuan, Peoples R China
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
4.Xinjiang Lab Petr Reserve Conglomerate, Karamay 834000, Xinjiang, Peoples R China
5.PetroChina Xinjiang Oilfield Co, Res Inst Expt & Detect, Karamay 834000, Xinjiang, Peoples R China
6.Peking Univ, Inst Oil & Gas, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Du SH,Zhao YP,Jin J,et al. Significance of the secondary pores in perthite for oil storage and flow in tight sandstone reservoir[J]. MARINE AND PETROLEUM GEOLOGY,2019,110:178-188.
APA 杜书恒,赵亚溥,Jin J,Kou G,Shi YM,&黄先富.(2019).Significance of the secondary pores in perthite for oil storage and flow in tight sandstone reservoir.MARINE AND PETROLEUM GEOLOGY,110,178-188.
MLA 杜书恒,et al."Significance of the secondary pores in perthite for oil storage and flow in tight sandstone reservoir".MARINE AND PETROLEUM GEOLOGY 110(2019):178-188.
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