IMECH-IR  > 流固耦合系统力学重点实验室
Water imbibition of shale and its potential influence on shale gas recovery-a comparative study of marine and continental shale formations
Shen YH; Ge HK; Li CX; Yang XY; Ren K; Yang ZH; Su S; Shen, YH (reprint author), China Univ Petr, Unconvent Nat Gas Res Inst, Beijing, Peoples R China.
Source PublicationJOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
2016
Volume35Pages:1121-1128
ISSN1875-5100
AbstractA large volume of fracturing fluid is pumped into a well to stimulate shale formation. The water is imbibed into the reservoir during this procedure. The effect of the imbibed water on gas recovery is still in debate. In this work, we study the spontaneous imbibition of water into marine shale samples from the Sichuan Basin and continental shale samples from Erdos Basin to explore the fluid imbibition characteristics and permeability change during water imbibition. Comparison of imbibition experiments shows that shale has stronger water imbibition and diffusion capacity than relatively higher permeability sandstone. Once the imbibition stops, water in shale has stronger ability to diffuse into deeper matrix, the water content in the main flow path decreases. Experiments in this study show that marine shale has stronger water imbibition capacity than continental shale. The permeability of continental shale decreases significantly with increasing imbibition water volume; however, the permeability of marine shale decreases at first and increases after a certain imbibition time. The induced fracture is obvious in the marine shale. SEM analysis shows that the relationship between the clay mineral and organic matter of continental shale is much more complex than that of marine shale, which may be the key factor restricting the water imbibition because the flow path is trapped by swelled clay minerals. Through this study, we concluded that whether gas recovery benefits from water imbibition depends on three aspects: 1) the diffusion ability of liquid into matrix; 2) the new cracks introduced by imbibed water; and 3) the formation sensibility. This study is useful for optimizing fracture fluids and determining the best flow-back method. (C) 2016 Elsevier B.V. All rights reserved.
KeywordSpontaneous Imbibition Gas Shale Soakback Hydraulic Fracturing Marine And Continental Shale Water Blockage Removal
DOI10.1016/j.jngse.2016.09.053
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000388543900099
WOS KeywordSpontaneous imbibition ; Gas shale ; Soakback ; Hydraulic fracturing ; Marine and continental shale ; Water blockage removal
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China [51490652, U1562215, 51604287] ; Science Foundation of China University of Petroleum, Beijing [2462015YQ1202] ; Sinopec scientific research project [P15026]
Classification二类
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59946
Collection流固耦合系统力学重点实验室
Corresponding AuthorShen, YH (reprint author), China Univ Petr, Unconvent Nat Gas Res Inst, Beijing, Peoples R China.
Recommended Citation
GB/T 7714
Shen YH,Ge HK,Li CX,et al. Water imbibition of shale and its potential influence on shale gas recovery-a comparative study of marine and continental shale formations[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2016,35:1121-1128.
APA Shen YH.,Ge HK.,Li CX.,Yang XY.,Ren K.,...&Shen, YH .(2016).Water imbibition of shale and its potential influence on shale gas recovery-a comparative study of marine and continental shale formations.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,35,1121-1128.
MLA Shen YH,et al."Water imbibition of shale and its potential influence on shale gas recovery-a comparative study of marine and continental shale formations".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 35(2016):1121-1128.
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