Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments

Abstract The rock mechanical properties and elastic anisotropy of terrestrial shale oil reservoirs are affected by various factors, such as lithology, structure, pores, fractures, and fluids. The experimental study of dynamic and static elastic properties can provide important mechanism analysis for the prediction of geological and engineering “sweet spots” in shale reservoirs. There are a large number of studies on the measurement of static mechanical properties of shale, but the experiments on dynamic cross-band elastic anisotropy of terrestrial shale have not yet been conducted thoroughly. Therefore, we report the anisotropic dispersion mechanism of favorable lithofacies (lamellar dolomitic shale, with vertical and horizontal bedding) in the inter-salt shale oil reservoir of the Qianjiang Formation for different confining pressures and fluid saturation conditions. The experiments were conducted by the cross-band rock physics measurement technology that comprised low-frequency stress-strain measurements and a high-frequency ultrasonic test. The experimental results indicated that: (1) The elastic property dispersion of the terrestrial shale was stronger than that of marine shale due to the high viscosity of the medium oil in the terrestrial shale. The lamellar structures and interbedded fractures were the main factors that determined the strong anisotropy of the terrestrial shale. (2) The dispersion of elastic properties from low to high frequencies in a partial oil saturation state ranged from strong to weak; the wave-induced fluid flow or intrinsic dissipation of viscoelastic inclusions may be the dominant mechanisms that caused the seismic dispersion. (3) The elastic parameters measured in the direction vertical to the bedding plane had stronger dispersion and pressure sensitivity than those measured in the direction parallel to the bedding plane, and the anisotropy and pressure sensitivity at seismic frequencies were higher than those at the ultrasonic frequencies. (4) Fluid filling reduced the pressure sensitivity of the elastic parameters along the direction vertical to the bedding plane, whereas the opposite trend was observed along the direction parallel to the bedding plane. (5) The anisotropic Gassmann theory could explain the P-wave velocity well at an extremely low frequency, but the prediction of S- and P-wave velocities at a relatively high frequency remained insufficient. Overall, our study can serve as a reliable mechanism reference for the study of frequency-dependent properties of azimuthal anisotropy, and provide important guidance for the seismic prediction of “sweet spots” in shale oil reservoirs. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Xiao, Zengjia [verfasserIn] Zhao, Jianguo Zhong, Qingliang Ouyang, Fang Liu, Xinze Yan, Bohong Li, Zhi Ma, Ming Wang, Bin Wang, Xiaoqiong

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	Terrestrial shale oil reservoir Rock physics Cross-band experiment Anisotropic dispersion Pressure sensitivity

Anmerkung:	© Science China Press 2023

Übergeordnetes Werk:	Enthalten in: Science in China - Heidelberg : Springer, 1997, 66(2023), 7 vom: 06. Juni, Seite 1603-1621
Übergeordnetes Werk:	volume:66 ; year:2023 ; number:7 ; day:06 ; month:06 ; pages:1603-1621

Links:	Volltext

DOI / URN:	10.1007/s11430-022-1063-3

Katalog-ID:	SPR052212149

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245	1	0	\|a Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments
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520			\|a Abstract The rock mechanical properties and elastic anisotropy of terrestrial shale oil reservoirs are affected by various factors, such as lithology, structure, pores, fractures, and fluids. The experimental study of dynamic and static elastic properties can provide important mechanism analysis for the prediction of geological and engineering “sweet spots” in shale reservoirs. There are a large number of studies on the measurement of static mechanical properties of shale, but the experiments on dynamic cross-band elastic anisotropy of terrestrial shale have not yet been conducted thoroughly. Therefore, we report the anisotropic dispersion mechanism of favorable lithofacies (lamellar dolomitic shale, with vertical and horizontal bedding) in the inter-salt shale oil reservoir of the Qianjiang Formation for different confining pressures and fluid saturation conditions. The experiments were conducted by the cross-band rock physics measurement technology that comprised low-frequency stress-strain measurements and a high-frequency ultrasonic test. The experimental results indicated that: (1) The elastic property dispersion of the terrestrial shale was stronger than that of marine shale due to the high viscosity of the medium oil in the terrestrial shale. The lamellar structures and interbedded fractures were the main factors that determined the strong anisotropy of the terrestrial shale. (2) The dispersion of elastic properties from low to high frequencies in a partial oil saturation state ranged from strong to weak; the wave-induced fluid flow or intrinsic dissipation of viscoelastic inclusions may be the dominant mechanisms that caused the seismic dispersion. (3) The elastic parameters measured in the direction vertical to the bedding plane had stronger dispersion and pressure sensitivity than those measured in the direction parallel to the bedding plane, and the anisotropy and pressure sensitivity at seismic frequencies were higher than those at the ultrasonic frequencies. (4) Fluid filling reduced the pressure sensitivity of the elastic parameters along the direction vertical to the bedding plane, whereas the opposite trend was observed along the direction parallel to the bedding plane. (5) The anisotropic Gassmann theory could explain the P-wave velocity well at an extremely low frequency, but the prediction of S- and P-wave velocities at a relatively high frequency remained insufficient. Overall, our study can serve as a reliable mechanism reference for the study of frequency-dependent properties of azimuthal anisotropy, and provide important guidance for the seismic prediction of “sweet spots” in shale oil reservoirs.
650		4	\|a Terrestrial shale oil reservoir \|7 (dpeaa)DE-He213
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700	1		\|a Li, Zhi \|4 aut
700	1		\|a Ma, Ming \|4 aut
700	1		\|a Wang, Bin \|4 aut
700	1		\|a Wang, Xiaoqiong \|4 aut
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allfields	10.1007/s11430-022-1063-3 doi (DE-627)SPR052212149 (SPR)s11430-022-1063-3-e DE-627 ger DE-627 rakwb eng Xiao, Zengjia verfasserin aut Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Science China Press 2023 Abstract The rock mechanical properties and elastic anisotropy of terrestrial shale oil reservoirs are affected by various factors, such as lithology, structure, pores, fractures, and fluids. The experimental study of dynamic and static elastic properties can provide important mechanism analysis for the prediction of geological and engineering “sweet spots” in shale reservoirs. There are a large number of studies on the measurement of static mechanical properties of shale, but the experiments on dynamic cross-band elastic anisotropy of terrestrial shale have not yet been conducted thoroughly. Therefore, we report the anisotropic dispersion mechanism of favorable lithofacies (lamellar dolomitic shale, with vertical and horizontal bedding) in the inter-salt shale oil reservoir of the Qianjiang Formation for different confining pressures and fluid saturation conditions. The experiments were conducted by the cross-band rock physics measurement technology that comprised low-frequency stress-strain measurements and a high-frequency ultrasonic test. The experimental results indicated that: (1) The elastic property dispersion of the terrestrial shale was stronger than that of marine shale due to the high viscosity of the medium oil in the terrestrial shale. The lamellar structures and interbedded fractures were the main factors that determined the strong anisotropy of the terrestrial shale. (2) The dispersion of elastic properties from low to high frequencies in a partial oil saturation state ranged from strong to weak; the wave-induced fluid flow or intrinsic dissipation of viscoelastic inclusions may be the dominant mechanisms that caused the seismic dispersion. (3) The elastic parameters measured in the direction vertical to the bedding plane had stronger dispersion and pressure sensitivity than those measured in the direction parallel to the bedding plane, and the anisotropy and pressure sensitivity at seismic frequencies were higher than those at the ultrasonic frequencies. (4) Fluid filling reduced the pressure sensitivity of the elastic parameters along the direction vertical to the bedding plane, whereas the opposite trend was observed along the direction parallel to the bedding plane. (5) The anisotropic Gassmann theory could explain the P-wave velocity well at an extremely low frequency, but the prediction of S- and P-wave velocities at a relatively high frequency remained insufficient. Overall, our study can serve as a reliable mechanism reference for the study of frequency-dependent properties of azimuthal anisotropy, and provide important guidance for the seismic prediction of “sweet spots” in shale oil reservoirs. Terrestrial shale oil reservoir (dpeaa)DE-He213 Rock physics (dpeaa)DE-He213 Cross-band experiment (dpeaa)DE-He213 Anisotropic dispersion (dpeaa)DE-He213 Pressure sensitivity (dpeaa)DE-He213 Zhao, Jianguo aut Zhong, Qingliang aut Ouyang, Fang aut Liu, Xinze aut Yan, Bohong aut Li, Zhi aut Ma, Ming aut Wang, Bin aut Wang, Xiaoqiong aut Enthalten in Science in China Heidelberg : Springer, 1997 66(2023), 7 vom: 06. Juni, Seite 1603-1621 (DE-627)385614748 (DE-600)2142896-7 1862-2801 nnns volume:66 year:2023 number:7 day:06 month:06 pages:1603-1621 https://dx.doi.org/10.1007/s11430-022-1063-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 66 2023 7 06 06 1603-1621
spelling	10.1007/s11430-022-1063-3 doi (DE-627)SPR052212149 (SPR)s11430-022-1063-3-e DE-627 ger DE-627 rakwb eng Xiao, Zengjia verfasserin aut Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Science China Press 2023 Abstract The rock mechanical properties and elastic anisotropy of terrestrial shale oil reservoirs are affected by various factors, such as lithology, structure, pores, fractures, and fluids. The experimental study of dynamic and static elastic properties can provide important mechanism analysis for the prediction of geological and engineering “sweet spots” in shale reservoirs. There are a large number of studies on the measurement of static mechanical properties of shale, but the experiments on dynamic cross-band elastic anisotropy of terrestrial shale have not yet been conducted thoroughly. Therefore, we report the anisotropic dispersion mechanism of favorable lithofacies (lamellar dolomitic shale, with vertical and horizontal bedding) in the inter-salt shale oil reservoir of the Qianjiang Formation for different confining pressures and fluid saturation conditions. The experiments were conducted by the cross-band rock physics measurement technology that comprised low-frequency stress-strain measurements and a high-frequency ultrasonic test. The experimental results indicated that: (1) The elastic property dispersion of the terrestrial shale was stronger than that of marine shale due to the high viscosity of the medium oil in the terrestrial shale. The lamellar structures and interbedded fractures were the main factors that determined the strong anisotropy of the terrestrial shale. (2) The dispersion of elastic properties from low to high frequencies in a partial oil saturation state ranged from strong to weak; the wave-induced fluid flow or intrinsic dissipation of viscoelastic inclusions may be the dominant mechanisms that caused the seismic dispersion. (3) The elastic parameters measured in the direction vertical to the bedding plane had stronger dispersion and pressure sensitivity than those measured in the direction parallel to the bedding plane, and the anisotropy and pressure sensitivity at seismic frequencies were higher than those at the ultrasonic frequencies. (4) Fluid filling reduced the pressure sensitivity of the elastic parameters along the direction vertical to the bedding plane, whereas the opposite trend was observed along the direction parallel to the bedding plane. (5) The anisotropic Gassmann theory could explain the P-wave velocity well at an extremely low frequency, but the prediction of S- and P-wave velocities at a relatively high frequency remained insufficient. Overall, our study can serve as a reliable mechanism reference for the study of frequency-dependent properties of azimuthal anisotropy, and provide important guidance for the seismic prediction of “sweet spots” in shale oil reservoirs. Terrestrial shale oil reservoir (dpeaa)DE-He213 Rock physics (dpeaa)DE-He213 Cross-band experiment (dpeaa)DE-He213 Anisotropic dispersion (dpeaa)DE-He213 Pressure sensitivity (dpeaa)DE-He213 Zhao, Jianguo aut Zhong, Qingliang aut Ouyang, Fang aut Liu, Xinze aut Yan, Bohong aut Li, Zhi aut Ma, Ming aut Wang, Bin aut Wang, Xiaoqiong aut Enthalten in Science in China Heidelberg : Springer, 1997 66(2023), 7 vom: 06. Juni, Seite 1603-1621 (DE-627)385614748 (DE-600)2142896-7 1862-2801 nnns volume:66 year:2023 number:7 day:06 month:06 pages:1603-1621 https://dx.doi.org/10.1007/s11430-022-1063-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 66 2023 7 06 06 1603-1621
allfields_unstemmed	10.1007/s11430-022-1063-3 doi (DE-627)SPR052212149 (SPR)s11430-022-1063-3-e DE-627 ger DE-627 rakwb eng Xiao, Zengjia verfasserin aut Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Science China Press 2023 Abstract The rock mechanical properties and elastic anisotropy of terrestrial shale oil reservoirs are affected by various factors, such as lithology, structure, pores, fractures, and fluids. The experimental study of dynamic and static elastic properties can provide important mechanism analysis for the prediction of geological and engineering “sweet spots” in shale reservoirs. There are a large number of studies on the measurement of static mechanical properties of shale, but the experiments on dynamic cross-band elastic anisotropy of terrestrial shale have not yet been conducted thoroughly. Therefore, we report the anisotropic dispersion mechanism of favorable lithofacies (lamellar dolomitic shale, with vertical and horizontal bedding) in the inter-salt shale oil reservoir of the Qianjiang Formation for different confining pressures and fluid saturation conditions. The experiments were conducted by the cross-band rock physics measurement technology that comprised low-frequency stress-strain measurements and a high-frequency ultrasonic test. The experimental results indicated that: (1) The elastic property dispersion of the terrestrial shale was stronger than that of marine shale due to the high viscosity of the medium oil in the terrestrial shale. The lamellar structures and interbedded fractures were the main factors that determined the strong anisotropy of the terrestrial shale. (2) The dispersion of elastic properties from low to high frequencies in a partial oil saturation state ranged from strong to weak; the wave-induced fluid flow or intrinsic dissipation of viscoelastic inclusions may be the dominant mechanisms that caused the seismic dispersion. (3) The elastic parameters measured in the direction vertical to the bedding plane had stronger dispersion and pressure sensitivity than those measured in the direction parallel to the bedding plane, and the anisotropy and pressure sensitivity at seismic frequencies were higher than those at the ultrasonic frequencies. (4) Fluid filling reduced the pressure sensitivity of the elastic parameters along the direction vertical to the bedding plane, whereas the opposite trend was observed along the direction parallel to the bedding plane. (5) The anisotropic Gassmann theory could explain the P-wave velocity well at an extremely low frequency, but the prediction of S- and P-wave velocities at a relatively high frequency remained insufficient. Overall, our study can serve as a reliable mechanism reference for the study of frequency-dependent properties of azimuthal anisotropy, and provide important guidance for the seismic prediction of “sweet spots” in shale oil reservoirs. Terrestrial shale oil reservoir (dpeaa)DE-He213 Rock physics (dpeaa)DE-He213 Cross-band experiment (dpeaa)DE-He213 Anisotropic dispersion (dpeaa)DE-He213 Pressure sensitivity (dpeaa)DE-He213 Zhao, Jianguo aut Zhong, Qingliang aut Ouyang, Fang aut Liu, Xinze aut Yan, Bohong aut Li, Zhi aut Ma, Ming aut Wang, Bin aut Wang, Xiaoqiong aut Enthalten in Science in China Heidelberg : Springer, 1997 66(2023), 7 vom: 06. Juni, Seite 1603-1621 (DE-627)385614748 (DE-600)2142896-7 1862-2801 nnns volume:66 year:2023 number:7 day:06 month:06 pages:1603-1621 https://dx.doi.org/10.1007/s11430-022-1063-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 66 2023 7 06 06 1603-1621
allfieldsGer	10.1007/s11430-022-1063-3 doi (DE-627)SPR052212149 (SPR)s11430-022-1063-3-e DE-627 ger DE-627 rakwb eng Xiao, Zengjia verfasserin aut Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Science China Press 2023 Abstract The rock mechanical properties and elastic anisotropy of terrestrial shale oil reservoirs are affected by various factors, such as lithology, structure, pores, fractures, and fluids. The experimental study of dynamic and static elastic properties can provide important mechanism analysis for the prediction of geological and engineering “sweet spots” in shale reservoirs. There are a large number of studies on the measurement of static mechanical properties of shale, but the experiments on dynamic cross-band elastic anisotropy of terrestrial shale have not yet been conducted thoroughly. Therefore, we report the anisotropic dispersion mechanism of favorable lithofacies (lamellar dolomitic shale, with vertical and horizontal bedding) in the inter-salt shale oil reservoir of the Qianjiang Formation for different confining pressures and fluid saturation conditions. The experiments were conducted by the cross-band rock physics measurement technology that comprised low-frequency stress-strain measurements and a high-frequency ultrasonic test. The experimental results indicated that: (1) The elastic property dispersion of the terrestrial shale was stronger than that of marine shale due to the high viscosity of the medium oil in the terrestrial shale. The lamellar structures and interbedded fractures were the main factors that determined the strong anisotropy of the terrestrial shale. (2) The dispersion of elastic properties from low to high frequencies in a partial oil saturation state ranged from strong to weak; the wave-induced fluid flow or intrinsic dissipation of viscoelastic inclusions may be the dominant mechanisms that caused the seismic dispersion. (3) The elastic parameters measured in the direction vertical to the bedding plane had stronger dispersion and pressure sensitivity than those measured in the direction parallel to the bedding plane, and the anisotropy and pressure sensitivity at seismic frequencies were higher than those at the ultrasonic frequencies. (4) Fluid filling reduced the pressure sensitivity of the elastic parameters along the direction vertical to the bedding plane, whereas the opposite trend was observed along the direction parallel to the bedding plane. (5) The anisotropic Gassmann theory could explain the P-wave velocity well at an extremely low frequency, but the prediction of S- and P-wave velocities at a relatively high frequency remained insufficient. Overall, our study can serve as a reliable mechanism reference for the study of frequency-dependent properties of azimuthal anisotropy, and provide important guidance for the seismic prediction of “sweet spots” in shale oil reservoirs. Terrestrial shale oil reservoir (dpeaa)DE-He213 Rock physics (dpeaa)DE-He213 Cross-band experiment (dpeaa)DE-He213 Anisotropic dispersion (dpeaa)DE-He213 Pressure sensitivity (dpeaa)DE-He213 Zhao, Jianguo aut Zhong, Qingliang aut Ouyang, Fang aut Liu, Xinze aut Yan, Bohong aut Li, Zhi aut Ma, Ming aut Wang, Bin aut Wang, Xiaoqiong aut Enthalten in Science in China Heidelberg : Springer, 1997 66(2023), 7 vom: 06. Juni, Seite 1603-1621 (DE-627)385614748 (DE-600)2142896-7 1862-2801 nnns volume:66 year:2023 number:7 day:06 month:06 pages:1603-1621 https://dx.doi.org/10.1007/s11430-022-1063-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 66 2023 7 06 06 1603-1621
allfieldsSound	10.1007/s11430-022-1063-3 doi (DE-627)SPR052212149 (SPR)s11430-022-1063-3-e DE-627 ger DE-627 rakwb eng Xiao, Zengjia verfasserin aut Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Science China Press 2023 Abstract The rock mechanical properties and elastic anisotropy of terrestrial shale oil reservoirs are affected by various factors, such as lithology, structure, pores, fractures, and fluids. The experimental study of dynamic and static elastic properties can provide important mechanism analysis for the prediction of geological and engineering “sweet spots” in shale reservoirs. There are a large number of studies on the measurement of static mechanical properties of shale, but the experiments on dynamic cross-band elastic anisotropy of terrestrial shale have not yet been conducted thoroughly. Therefore, we report the anisotropic dispersion mechanism of favorable lithofacies (lamellar dolomitic shale, with vertical and horizontal bedding) in the inter-salt shale oil reservoir of the Qianjiang Formation for different confining pressures and fluid saturation conditions. The experiments were conducted by the cross-band rock physics measurement technology that comprised low-frequency stress-strain measurements and a high-frequency ultrasonic test. The experimental results indicated that: (1) The elastic property dispersion of the terrestrial shale was stronger than that of marine shale due to the high viscosity of the medium oil in the terrestrial shale. The lamellar structures and interbedded fractures were the main factors that determined the strong anisotropy of the terrestrial shale. (2) The dispersion of elastic properties from low to high frequencies in a partial oil saturation state ranged from strong to weak; the wave-induced fluid flow or intrinsic dissipation of viscoelastic inclusions may be the dominant mechanisms that caused the seismic dispersion. (3) The elastic parameters measured in the direction vertical to the bedding plane had stronger dispersion and pressure sensitivity than those measured in the direction parallel to the bedding plane, and the anisotropy and pressure sensitivity at seismic frequencies were higher than those at the ultrasonic frequencies. (4) Fluid filling reduced the pressure sensitivity of the elastic parameters along the direction vertical to the bedding plane, whereas the opposite trend was observed along the direction parallel to the bedding plane. (5) The anisotropic Gassmann theory could explain the P-wave velocity well at an extremely low frequency, but the prediction of S- and P-wave velocities at a relatively high frequency remained insufficient. Overall, our study can serve as a reliable mechanism reference for the study of frequency-dependent properties of azimuthal anisotropy, and provide important guidance for the seismic prediction of “sweet spots” in shale oil reservoirs. Terrestrial shale oil reservoir (dpeaa)DE-He213 Rock physics (dpeaa)DE-He213 Cross-band experiment (dpeaa)DE-He213 Anisotropic dispersion (dpeaa)DE-He213 Pressure sensitivity (dpeaa)DE-He213 Zhao, Jianguo aut Zhong, Qingliang aut Ouyang, Fang aut Liu, Xinze aut Yan, Bohong aut Li, Zhi aut Ma, Ming aut Wang, Bin aut Wang, Xiaoqiong aut Enthalten in Science in China Heidelberg : Springer, 1997 66(2023), 7 vom: 06. Juni, Seite 1603-1621 (DE-627)385614748 (DE-600)2142896-7 1862-2801 nnns volume:66 year:2023 number:7 day:06 month:06 pages:1603-1621 https://dx.doi.org/10.1007/s11430-022-1063-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 66 2023 7 06 06 1603-1621
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source	Enthalten in Science in China 66(2023), 7 vom: 06. Juni, Seite 1603-1621 volume:66 year:2023 number:7 day:06 month:06 pages:1603-1621
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authorswithroles_txt_mv	Xiao, Zengjia @@aut@@ Zhao, Jianguo @@aut@@ Zhong, Qingliang @@aut@@ Ouyang, Fang @@aut@@ Liu, Xinze @@aut@@ Yan, Bohong @@aut@@ Li, Zhi @@aut@@ Ma, Ming @@aut@@ Wang, Bin @@aut@@ Wang, Xiaoqiong @@aut@@
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author	Xiao, Zengjia
spellingShingle	Xiao, Zengjia misc Terrestrial shale oil reservoir misc Rock physics misc Cross-band experiment misc Anisotropic dispersion misc Pressure sensitivity Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments
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topic_title	Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments Terrestrial shale oil reservoir (dpeaa)DE-He213 Rock physics (dpeaa)DE-He213 Cross-band experiment (dpeaa)DE-He213 Anisotropic dispersion (dpeaa)DE-He213 Pressure sensitivity (dpeaa)DE-He213
topic	misc Terrestrial shale oil reservoir misc Rock physics misc Cross-band experiment misc Anisotropic dispersion misc Pressure sensitivity
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title	Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments
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title_full	Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments
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title_sort	anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments
title_auth	Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments
abstract	Abstract The rock mechanical properties and elastic anisotropy of terrestrial shale oil reservoirs are affected by various factors, such as lithology, structure, pores, fractures, and fluids. The experimental study of dynamic and static elastic properties can provide important mechanism analysis for the prediction of geological and engineering “sweet spots” in shale reservoirs. There are a large number of studies on the measurement of static mechanical properties of shale, but the experiments on dynamic cross-band elastic anisotropy of terrestrial shale have not yet been conducted thoroughly. Therefore, we report the anisotropic dispersion mechanism of favorable lithofacies (lamellar dolomitic shale, with vertical and horizontal bedding) in the inter-salt shale oil reservoir of the Qianjiang Formation for different confining pressures and fluid saturation conditions. The experiments were conducted by the cross-band rock physics measurement technology that comprised low-frequency stress-strain measurements and a high-frequency ultrasonic test. The experimental results indicated that: (1) The elastic property dispersion of the terrestrial shale was stronger than that of marine shale due to the high viscosity of the medium oil in the terrestrial shale. The lamellar structures and interbedded fractures were the main factors that determined the strong anisotropy of the terrestrial shale. (2) The dispersion of elastic properties from low to high frequencies in a partial oil saturation state ranged from strong to weak; the wave-induced fluid flow or intrinsic dissipation of viscoelastic inclusions may be the dominant mechanisms that caused the seismic dispersion. (3) The elastic parameters measured in the direction vertical to the bedding plane had stronger dispersion and pressure sensitivity than those measured in the direction parallel to the bedding plane, and the anisotropy and pressure sensitivity at seismic frequencies were higher than those at the ultrasonic frequencies. (4) Fluid filling reduced the pressure sensitivity of the elastic parameters along the direction vertical to the bedding plane, whereas the opposite trend was observed along the direction parallel to the bedding plane. (5) The anisotropic Gassmann theory could explain the P-wave velocity well at an extremely low frequency, but the prediction of S- and P-wave velocities at a relatively high frequency remained insufficient. Overall, our study can serve as a reliable mechanism reference for the study of frequency-dependent properties of azimuthal anisotropy, and provide important guidance for the seismic prediction of “sweet spots” in shale oil reservoirs. © Science China Press 2023
abstractGer	Abstract The rock mechanical properties and elastic anisotropy of terrestrial shale oil reservoirs are affected by various factors, such as lithology, structure, pores, fractures, and fluids. The experimental study of dynamic and static elastic properties can provide important mechanism analysis for the prediction of geological and engineering “sweet spots” in shale reservoirs. There are a large number of studies on the measurement of static mechanical properties of shale, but the experiments on dynamic cross-band elastic anisotropy of terrestrial shale have not yet been conducted thoroughly. Therefore, we report the anisotropic dispersion mechanism of favorable lithofacies (lamellar dolomitic shale, with vertical and horizontal bedding) in the inter-salt shale oil reservoir of the Qianjiang Formation for different confining pressures and fluid saturation conditions. The experiments were conducted by the cross-band rock physics measurement technology that comprised low-frequency stress-strain measurements and a high-frequency ultrasonic test. The experimental results indicated that: (1) The elastic property dispersion of the terrestrial shale was stronger than that of marine shale due to the high viscosity of the medium oil in the terrestrial shale. The lamellar structures and interbedded fractures were the main factors that determined the strong anisotropy of the terrestrial shale. (2) The dispersion of elastic properties from low to high frequencies in a partial oil saturation state ranged from strong to weak; the wave-induced fluid flow or intrinsic dissipation of viscoelastic inclusions may be the dominant mechanisms that caused the seismic dispersion. (3) The elastic parameters measured in the direction vertical to the bedding plane had stronger dispersion and pressure sensitivity than those measured in the direction parallel to the bedding plane, and the anisotropy and pressure sensitivity at seismic frequencies were higher than those at the ultrasonic frequencies. (4) Fluid filling reduced the pressure sensitivity of the elastic parameters along the direction vertical to the bedding plane, whereas the opposite trend was observed along the direction parallel to the bedding plane. (5) The anisotropic Gassmann theory could explain the P-wave velocity well at an extremely low frequency, but the prediction of S- and P-wave velocities at a relatively high frequency remained insufficient. Overall, our study can serve as a reliable mechanism reference for the study of frequency-dependent properties of azimuthal anisotropy, and provide important guidance for the seismic prediction of “sweet spots” in shale oil reservoirs. © Science China Press 2023
abstract_unstemmed	Abstract The rock mechanical properties and elastic anisotropy of terrestrial shale oil reservoirs are affected by various factors, such as lithology, structure, pores, fractures, and fluids. The experimental study of dynamic and static elastic properties can provide important mechanism analysis for the prediction of geological and engineering “sweet spots” in shale reservoirs. There are a large number of studies on the measurement of static mechanical properties of shale, but the experiments on dynamic cross-band elastic anisotropy of terrestrial shale have not yet been conducted thoroughly. Therefore, we report the anisotropic dispersion mechanism of favorable lithofacies (lamellar dolomitic shale, with vertical and horizontal bedding) in the inter-salt shale oil reservoir of the Qianjiang Formation for different confining pressures and fluid saturation conditions. The experiments were conducted by the cross-band rock physics measurement technology that comprised low-frequency stress-strain measurements and a high-frequency ultrasonic test. The experimental results indicated that: (1) The elastic property dispersion of the terrestrial shale was stronger than that of marine shale due to the high viscosity of the medium oil in the terrestrial shale. The lamellar structures and interbedded fractures were the main factors that determined the strong anisotropy of the terrestrial shale. (2) The dispersion of elastic properties from low to high frequencies in a partial oil saturation state ranged from strong to weak; the wave-induced fluid flow or intrinsic dissipation of viscoelastic inclusions may be the dominant mechanisms that caused the seismic dispersion. (3) The elastic parameters measured in the direction vertical to the bedding plane had stronger dispersion and pressure sensitivity than those measured in the direction parallel to the bedding plane, and the anisotropy and pressure sensitivity at seismic frequencies were higher than those at the ultrasonic frequencies. (4) Fluid filling reduced the pressure sensitivity of the elastic parameters along the direction vertical to the bedding plane, whereas the opposite trend was observed along the direction parallel to the bedding plane. (5) The anisotropic Gassmann theory could explain the P-wave velocity well at an extremely low frequency, but the prediction of S- and P-wave velocities at a relatively high frequency remained insufficient. Overall, our study can serve as a reliable mechanism reference for the study of frequency-dependent properties of azimuthal anisotropy, and provide important guidance for the seismic prediction of “sweet spots” in shale oil reservoirs. © Science China Press 2023
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container_issue	7
title_short	Anisotropic dispersion mechanism of inter-salt shale oil reservoir in terrestrial saline lake sediments using cross-band experiments
url	https://dx.doi.org/10.1007/s11430-022-1063-3
remote_bool	true
author2	Zhao, Jianguo Zhong, Qingliang Ouyang, Fang Liu, Xinze Yan, Bohong Li, Zhi Ma, Ming Wang, Bin Wang, Xiaoqiong
author2Str	Zhao, Jianguo Zhong, Qingliang Ouyang, Fang Liu, Xinze Yan, Bohong Li, Zhi Ma, Ming Wang, Bin Wang, Xiaoqiong
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doi_str	10.1007/s11430-022-1063-3
up_date	2024-07-04T01:48:55.878Z
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