气候变化领域集成服务门户(CCPortal): Nuclear magnetic resonance and X-ray microtomography pore-scale analysis of oil recovery in mixed-porosity carbonates

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DOI	10.1306/04151918083
	Nuclear magnetic resonance and X-ray microtomography pore-scale analysis of oil recovery in mixed-porosity carbonates
	King H.; Sansone M.; Dunsmuir J.; Callen N.; Kortunov P.; Xu Y.; Buono A.; Gao B.; Kralik J.
发表日期	2020
ISSN	0149-1423
起始页码	37
结束页码	52
卷号	104 期号:1
英文摘要	With the recognition that carbonate reservoir rocks commonly contain a significant microporosity component (pore sizes ~1 mm), there has been an ongoing effort to understand how this affects hydrocarbon recovery. This work reports X-ray microtomography (XMT) and nuclear magnetic resonance (NMR) data on two characteristic rock types. One is micropore dominated, and the other exhibits mixed-pore sizes. Several new techniques are introduced to accommodate investigation of full-sized core-plug samples having preserved wettability and to performsuch studies with native fluids. First, the uses of high-field NMR techniques are demonstrated to determine porosity, overall oil and water content, and how these fluids are distributed between micro- A nd macropores. It is found that microporosity values agree with those obtained by optical (total pore system) analysis. Second, the use of xenon gas to tag the native oil phase for XMT imaging is demonstrated, showing how this helps determine contributions from pores that are smaller than the instrument resolution. Finally, a new method that uses NMR measurements of oil and water saturations to constrain the image analysis is demonstrated. The analysis shows the extent to which oil recovery occurs from the different pore systems. In both rock types, oil in the macroporosity is preferentially swept. Nevertheless, in agreement with a recent theory, oil recovery from the microporosity is significant. For the 70% microporosity sample, approximately one-third of the total oil recovery comes from the micropores, a factor that agrees well with theory. © 2020 ExxonMobil Research and Engineering Company. All rights reserved.
关键词	Microporosity Petroleum reservoirs Pore size Tomography X rays Carbonate reservoir Hydrocarbon recovery Macro-porosity NMR measurements Nuclear magnetic resonance(NMR)Total oil recovery Water saturations X ray microtomography Nuclear magnetic resonance carbonate rock enhanced oil recovery nuclear magnetic resonance pore space porosity saturation tomography water content X-ray analysis xenon
语种	英语
来源机构	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131680
推荐引用方式 GB/T 7714	King H.,Sansone M.,Dunsmuir J.,et al. Nuclear magnetic resonance and X-ray microtomography pore-scale analysis of oil recovery in mixed-porosity carbonates[J]. AAPG Bulletin,2020,104(1).
APA	King H..,Sansone M..,Dunsmuir J..,Callen N..,Kortunov P..,...&Kralik J..(2020).Nuclear magnetic resonance and X-ray microtomography pore-scale analysis of oil recovery in mixed-porosity carbonates.,104(1).
MLA	King H.,et al."Nuclear magnetic resonance and X-ray microtomography pore-scale analysis of oil recovery in mixed-porosity carbonates".104.1(2020).