Interactions Between Laminated Shale Oil Reservoir and Fracturing Fluid: A Case Study from the Chang 7 3 Member of the Triassic Heshui Area in the Ordos Basin, China.
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| Title: | Interactions Between Laminated Shale Oil Reservoir and Fracturing Fluid: A Case Study from the Chang 7 3 Member of the Triassic Heshui Area in the Ordos Basin, China. |
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| Authors: | Zhang, Xuanming1 (AUTHOR), Yu, Xiaorong1,2 (AUTHOR) yxr_cjdx@163.com, Yang, Pengqi3 (AUTHOR), Cai, Jinchi1,3 (AUTHOR), Yang, Huan1,2 (AUTHOR), Su, Gaoshen1,2,3 (AUTHOR) |
| Source: | Energies (19961073). Mar2026, Vol. 19 Issue 5, p1357. 23p. |
| Subject Terms: | *Fracturing fluids, *Water-rock interaction, *Deterioration of materials, *Rock deformation, *Geological basins, *Shale gas reservoirs, *Rock permeability |
| Geographic Terms: | China |
| Abstract: | This study systematically investigates the reaction characteristics of laminated shale oil reservoirs in the 73 sub-member of the Yanchang Formation, Heshui area, Ordos Basin, under exposure to CNI-I nanoviscous fracturing fluid. The reservoir matrix comprises 84.85% brittle minerals and 15.15% clay minerals. Fluid–rock interactions significantly dissolve calcite and dolomite, releasing Ca2+ and Mg2+ ions, while clay mineral reactions liberate substantial amounts of Na+. Post-reaction, fluid system stability is markedly reduced, elevating the risk of precipitate formation and pore-throat plugging. Exposure to fracturing fluid reduces the T2 cutoff value of core samples from 3.29 ms to 1.72 ms, indicating a densification of the micro-pore-throat network and a decline in mobile fluid saturation, while fracture apertures exhibit widening. Based on empirical data, a discriminant criterion (R value) defined as the ratio of fracture aperture increment rate to pore-throat diameter reduction rate is established at 1.25, confirming that fracture propagation dominates over pore constriction. Dual-medium modeling yields a net permeability enhancement of 19.35%. Fluid–rock interactions induce overall degradation of rock mechanical properties with pronounced anisotropy: rock strength along the direction perpendicular to bedding declines by 37.546%, Young's modulus decreases by 1.81%, and Poisson's ratio increases by 0.02%—all significantly exceeding the degree of degradation parallel to bedding. This anisotropic mechanical degradation predisposes the near-wellbore region to shear slip and wall spalling, prompting the development of targeted engineering mitigation strategies. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 192641082 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Interactions Between Laminated Shale Oil Reservoir and Fracturing Fluid: A Case Study from the Chang 7 3 Member of the Triassic Heshui Area in the Ordos Basin, China. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Xuanming%22">Zhang, Xuanming</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yu%2C+Xiaorong%22">Yu, Xiaorong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> yxr_cjdx@163.com</i><br /><searchLink fieldCode="AR" term="%22Yang%2C+Pengqi%22">Yang, Pengqi</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cai%2C+Jinchi%22">Cai, Jinchi</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Huan%22">Yang, Huan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Su%2C+Gaoshen%22">Su, Gaoshen</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Mar2026, Vol. 19 Issue 5, p1357. 23p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Fracturing+fluids%22">Fracturing fluids</searchLink><br />*<searchLink fieldCode="DE" term="%22Water-rock+interaction%22">Water-rock interaction</searchLink><br />*<searchLink fieldCode="DE" term="%22Deterioration+of+materials%22">Deterioration of materials</searchLink><br />*<searchLink fieldCode="DE" term="%22Rock+deformation%22">Rock deformation</searchLink><br />*<searchLink fieldCode="DE" term="%22Geological+basins%22">Geological basins</searchLink><br />*<searchLink fieldCode="DE" term="%22Shale+gas+reservoirs%22">Shale gas reservoirs</searchLink><br />*<searchLink fieldCode="DE" term="%22Rock+permeability%22">Rock permeability</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22China%22">China</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study systematically investigates the reaction characteristics of laminated shale oil reservoirs in the 73 sub-member of the Yanchang Formation, Heshui area, Ordos Basin, under exposure to CNI-I nanoviscous fracturing fluid. The reservoir matrix comprises 84.85% brittle minerals and 15.15% clay minerals. Fluid–rock interactions significantly dissolve calcite and dolomite, releasing Ca2+ and Mg2+ ions, while clay mineral reactions liberate substantial amounts of Na+. Post-reaction, fluid system stability is markedly reduced, elevating the risk of precipitate formation and pore-throat plugging. Exposure to fracturing fluid reduces the T2 cutoff value of core samples from 3.29 ms to 1.72 ms, indicating a densification of the micro-pore-throat network and a decline in mobile fluid saturation, while fracture apertures exhibit widening. Based on empirical data, a discriminant criterion (R value) defined as the ratio of fracture aperture increment rate to pore-throat diameter reduction rate is established at 1.25, confirming that fracture propagation dominates over pore constriction. Dual-medium modeling yields a net permeability enhancement of 19.35%. Fluid–rock interactions induce overall degradation of rock mechanical properties with pronounced anisotropy: rock strength along the direction perpendicular to bedding declines by 37.546%, Young's modulus decreases by 1.81%, and Poisson's ratio increases by 0.02%—all significantly exceeding the degree of degradation parallel to bedding. This anisotropic mechanical degradation predisposes the near-wellbore region to shear slip and wall spalling, prompting the development of targeted engineering mitigation strategies. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en19051357 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 1357 Subjects: – SubjectFull: Fracturing fluids Type: general – SubjectFull: Water-rock interaction Type: general – SubjectFull: Deterioration of materials Type: general – SubjectFull: Rock deformation Type: general – SubjectFull: Geological basins Type: general – SubjectFull: Shale gas reservoirs Type: general – SubjectFull: Rock permeability Type: general – SubjectFull: China Type: general Titles: – TitleFull: Interactions Between Laminated Shale Oil Reservoir and Fracturing Fluid: A Case Study from the Chang 7 3 Member of the Triassic Heshui Area in the Ordos Basin, China. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zhang, Xuanming – PersonEntity: Name: NameFull: Yu, Xiaorong – PersonEntity: Name: NameFull: Yang, Pengqi – PersonEntity: Name: NameFull: Cai, Jinchi – PersonEntity: Name: NameFull: Yang, Huan – PersonEntity: Name: NameFull: Su, Gaoshen IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 19 – Type: issue Value: 5 Titles: – TitleFull: Energies (19961073) Type: main |
| ResultId | 1 |
