NMR Investigation of Brine Imbibition Dynamics in Pores of Tight Sandstones under Different Boundary Conditions

doi:10.1021/acs.energyfuels.1c01417

	NMR Investigation of Brine Imbibition Dynamics in Pores of Tight Sandstones under Different Boundary Conditions
	Umeobi, Happiness Ijeoma 1,2; Li, Qi 1,2; Xu, Liang 1,2; Tan, Yongsheng 1,2; Xu, Lifeng 1,2; Zhong, Yu 1,2; Onyekwena, Chikezie Chimere 1,2
刊名	ENERGY & FUELS
	2021-10-07
卷号	35 期号:19 页码:15856-15866
ISSN号	0887-0624
DOI	10.1021/acs.energyfuels.1c01417
英文摘要	This study explores imbibition dynamics and flowback of fracturing fluids in Penglaizhen sandstones by imbibition experiment and nuclear magnetic resonance analysis. A gas-water system was considered and samples were subjected to different boundary conditions and fully immersed in the wetting phase for imbibition. A close range of the pore radius was observed between 0.1 nm and 9.3 mu m for all samples. Basic features of the imbibition phases were represented by the imbibition profile, and imbibition parameters were quantified in terms of gas recovery, imbibition capacity, imbibition index and pore connectivity, diffusion ability, and imbibition potential under the respective boundary conditions. The study reveals that capillary imbibition (mainly in all-face-open (AFO) and two-end-closed (TEC)) and diffusion imbibition (mainly in two-end-open (TEO) and one-end-open (OEO)) are the major mechanisms by which fracture fluids flow into the formation matrix. There is high gas recovery in all samples (>79%), which can be attributed to the high water-wet nature of the samples, while the residual gas saturation is very low with the highest value in OEO at 0.17 and the lowest in AFO at 0.01. The strong capillary force in AFO and TEC boundary conditions is the key factor for higher gas recovery than TEO and OEO samples. However, the low diffusion ability of AFO and TEC samples depict a low gas displacement effect. On the other hand, TEO and OEO boundary conditions show an increased gas displacement effect through increased diffusion ability. The imbibition index (which represents pore connection) and imbibition potential from the highest to the lowest also correspond to the diffusion ability from the highest to the lowest.
资助项目	National Natural Science Foundation of China[41872210] ; National Natural Science Foundation of China[41274111] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering[Z020001] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering[Z017002] ; CAS-TWAS President's Postgraduate Fellowship ; ANSO Scholarship
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000707030800043
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28384]
专题	中科院武汉岩土力学所
通讯作者	Li, Qi
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Umeobi, Happiness Ijeoma,Li, Qi,Xu, Liang,et al. NMR Investigation of Brine Imbibition Dynamics in Pores of Tight Sandstones under Different Boundary Conditions[J]. ENERGY & FUELS,2021,35(19):15856-15866.
APA	Umeobi, Happiness Ijeoma.,Li, Qi.,Xu, Liang.,Tan, Yongsheng.,Xu, Lifeng.,...&Onyekwena, Chikezie Chimere.(2021).NMR Investigation of Brine Imbibition Dynamics in Pores of Tight Sandstones under Different Boundary Conditions.ENERGY & FUELS,35(19),15856-15866.
MLA	Umeobi, Happiness Ijeoma,et al."NMR Investigation of Brine Imbibition Dynamics in Pores of Tight Sandstones under Different Boundary Conditions".ENERGY & FUELS 35.19(2021):15856-15866.