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Advances in understanding imbibition characteristics of shale using an NMR technique: a comparative study of marine and continental shale
Yang L; Dou NH; Lu XB(鲁晓兵); Zhang XH(张旭辉); Chen X; Gao J; Yang CW; Wang Y
发表期刊JOURNAL OF GEOPHYSICS AND ENGINEERING
2018-08-01
卷号15期号:4页码:1363-1375
ISSN1742-2132
摘要Studying the imbibition characteristics of shale contributes to understanding the low flowback efficiency (< 20%) and its potential effects on gas production. Previous studies have mainly focused on imbibition characteristics of marine shale, but few investigations have been conducted on continental shale to explore the microscopic imbibition mechanism. This paper performs a series imbibition experiments on typical sandstone, marine, and continental shale samples. The water migration and distribution is monitored by the nuclear magnetic resonance technique. For the same type of shale (marine or continental shale), the imbibition rate has a positive relationship with the clay mineral content. But continental shale contains more clay minerals and has a larger imbibition rate than marine shale. The expansion of clay minerals may have different impacts on the pore structure of marine and continental shale as the T2 spectra present. In contrary to non-swelling sandstone with constant T2 values, the T2 values of marine and continental shale vary during water imbibition. The T2 values of marine shale increase gradually due to the extension of microfractures, which can enhance the water imbibition rate and gas flowing channels significantly. However, the T2 values of continental shale decrease gradually as a result of destruction of matrix pores, which can decrease the water imbibition rate and have negative effects on gas flow channels. Compared with continental shale, the low flowback efficiency induced by water imbibition may be more suitable for marine shale to get good shale gas production. These findings can help understand the special imbibition characteristics of marine and continental shale.
关键词Marine Shale Continental Shale Imbibition Clay Minerals Nmr
DOI10.1088/1742-2140/aaaf76
收录类别SCI
语种英语
WOS记录号WOS:000431030900006
关键词[WOS]NUCLEAR-MAGNETIC-RESONANCE ; POROUS-MEDIA ; WATER ; ROCK ; FRACTURES ; CAPACITY
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
项目资助者National Natural Science Foundation of China(11702296) ; National Science and Technology Major Project(2016ZX05046-003) ; China Postdoctoral Science Foundation(2016M601141)
论文分区Q3
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77486
专题流固耦合系统力学重点实验室
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GB/T 7714
Yang L,Dou NH,Lu XB,et al. Advances in understanding imbibition characteristics of shale using an NMR technique: a comparative study of marine and continental shale[J]. JOURNAL OF GEOPHYSICS AND ENGINEERING,2018,15(4):1363-1375.
APA Yang L.,Dou NH.,鲁晓兵.,张旭辉.,Chen X.,...&Wang Y.(2018).Advances in understanding imbibition characteristics of shale using an NMR technique: a comparative study of marine and continental shale.JOURNAL OF GEOPHYSICS AND ENGINEERING,15(4),1363-1375.
MLA Yang L,et al."Advances in understanding imbibition characteristics of shale using an NMR technique: a comparative study of marine and continental shale".JOURNAL OF GEOPHYSICS AND ENGINEERING 15.4(2018):1363-1375.
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