Understanding stress-sensitive behavior of pore structure in tight sandstone reservoirs under cyclic compression using mineral, morphology, and stress analyses
Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Zhao, Ning [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Übergeordnetes Werk: |
Enthalten in: Iterated Gilbert mosaics - Baccelli, Francois ELSEVIER, 2019, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:218 ; year:2022 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.petrol.2022.110987 |
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| 245 | 1 | 0 | |a Understanding stress-sensitive behavior of pore structure in tight sandstone reservoirs under cyclic compression using mineral, morphology, and stress analyses |
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| 520 | |a Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. | ||
| 520 | |a Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. | ||
| 650 | 7 | |a Stress sensitivity |2 Elsevier | |
| 650 | 7 | |a Microscopic morphology |2 Elsevier | |
| 650 | 7 | |a Cyclic effective stress |2 Elsevier | |
| 650 | 7 | |a Tight sandstone |2 Elsevier | |
| 650 | 7 | |a Mechanical stability |2 Elsevier | |
| 650 | 7 | |a Mineral components |2 Elsevier | |
| 700 | 1 | |a Wang, Liang |4 oth | |
| 700 | 1 | |a Sima, Liqiang |4 oth | |
| 700 | 1 | |a Guo, Yuhao |4 oth | |
| 700 | 1 | |a Zhang, Hao |4 oth | |
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10.1016/j.petrol.2022.110987 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001939.pica (DE-627)ELV059083360 (ELSEVIER)S0920-4105(22)00840-3 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Zhao, Ning verfasserin aut Understanding stress-sensitive behavior of pore structure in tight sandstone reservoirs under cyclic compression using mineral, morphology, and stress analyses 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. Stress sensitivity Elsevier Microscopic morphology Elsevier Cyclic effective stress Elsevier Tight sandstone Elsevier Mechanical stability Elsevier Mineral components Elsevier Wang, Liang oth Sima, Liqiang oth Guo, Yuhao oth Zhang, Hao oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:218 year:2022 pages:0 https://doi.org/10.1016/j.petrol.2022.110987 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 218 2022 0 |
| spelling |
10.1016/j.petrol.2022.110987 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001939.pica (DE-627)ELV059083360 (ELSEVIER)S0920-4105(22)00840-3 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Zhao, Ning verfasserin aut Understanding stress-sensitive behavior of pore structure in tight sandstone reservoirs under cyclic compression using mineral, morphology, and stress analyses 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. Stress sensitivity Elsevier Microscopic morphology Elsevier Cyclic effective stress Elsevier Tight sandstone Elsevier Mechanical stability Elsevier Mineral components Elsevier Wang, Liang oth Sima, Liqiang oth Guo, Yuhao oth Zhang, Hao oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:218 year:2022 pages:0 https://doi.org/10.1016/j.petrol.2022.110987 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 218 2022 0 |
| allfields_unstemmed |
10.1016/j.petrol.2022.110987 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001939.pica (DE-627)ELV059083360 (ELSEVIER)S0920-4105(22)00840-3 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Zhao, Ning verfasserin aut Understanding stress-sensitive behavior of pore structure in tight sandstone reservoirs under cyclic compression using mineral, morphology, and stress analyses 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. Stress sensitivity Elsevier Microscopic morphology Elsevier Cyclic effective stress Elsevier Tight sandstone Elsevier Mechanical stability Elsevier Mineral components Elsevier Wang, Liang oth Sima, Liqiang oth Guo, Yuhao oth Zhang, Hao oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:218 year:2022 pages:0 https://doi.org/10.1016/j.petrol.2022.110987 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 218 2022 0 |
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10.1016/j.petrol.2022.110987 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001939.pica (DE-627)ELV059083360 (ELSEVIER)S0920-4105(22)00840-3 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Zhao, Ning verfasserin aut Understanding stress-sensitive behavior of pore structure in tight sandstone reservoirs under cyclic compression using mineral, morphology, and stress analyses 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. Stress sensitivity Elsevier Microscopic morphology Elsevier Cyclic effective stress Elsevier Tight sandstone Elsevier Mechanical stability Elsevier Mineral components Elsevier Wang, Liang oth Sima, Liqiang oth Guo, Yuhao oth Zhang, Hao oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:218 year:2022 pages:0 https://doi.org/10.1016/j.petrol.2022.110987 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 218 2022 0 |
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10.1016/j.petrol.2022.110987 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001939.pica (DE-627)ELV059083360 (ELSEVIER)S0920-4105(22)00840-3 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Zhao, Ning verfasserin aut Understanding stress-sensitive behavior of pore structure in tight sandstone reservoirs under cyclic compression using mineral, morphology, and stress analyses 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. Stress sensitivity Elsevier Microscopic morphology Elsevier Cyclic effective stress Elsevier Tight sandstone Elsevier Mechanical stability Elsevier Mineral components Elsevier Wang, Liang oth Sima, Liqiang oth Guo, Yuhao oth Zhang, Hao oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:218 year:2022 pages:0 https://doi.org/10.1016/j.petrol.2022.110987 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 218 2022 0 |
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During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. 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understanding stress-sensitive behavior of pore structure in tight sandstone reservoirs under cyclic compression using mineral, morphology, and stress analyses |
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Understanding stress-sensitive behavior of pore structure in tight sandstone reservoirs under cyclic compression using mineral, morphology, and stress analyses |
| abstract |
Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. |
| abstractGer |
Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. |
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Tight sandstone reservoirs have excellent potential as oil and gas exploration fields. During exploitation, drilling upsets the stress balance of the reservoir. The top priority is studying the stress state in subsequent hydraulic fracturing and production operations. This study selected the samples of the Lower Shihezi Formation in Ordos Basin as research target, and investigated the stress sensitivity of tight sandstones based on casting thin sections (CTS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and X-ray diffraction analysis (XRD). The results show that the fluctuation of permeability is larger than that of the porosity under the cyclic effective stress. Pore types can be divided into fracture-like, irregular oval, spherical arches, and triangle pores. Non-homogeneous deformation of microscopic structures and minerals eventually leads to permeability evolution. Overall, this study proposes novel pore models and throat types and provides insight into the stress sensitivity of tight sandstone reservoirs. A comprehensive analysis of stress sensitivity control factors for tight sandstones was then performed considering the combined effect of mineral components, microscopic morphology, and mechanical stability. However, we acknowledge that laboratory stress sensitivity evaluation generally does not completely represent the field-scale stress sensitivity. Therefore, the sample preparation and experimental conditions and process need to simulate in situ formation conditions as comprehensively as possible in future studies. |
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