Fluid inclusion and stable isotopic studies of thermochemical sulfate reduction: Upper permian and lower triassic gasfields, northeast Sichuan Basin, China
Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O tr...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Li, Kaikai [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2019transfer abstract |
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| Schlagwörter: |
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| Umfang: |
23 |
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| Übergeordnetes Werk: |
Enthalten in: 109 Discovery of Novel DNA Methylation Markers for the Detection of Colorectal Neoplasia: Selection by Methylome-Wide Analysis - Taylor, William R. ELSEVIER, 2014, journal of the Geochemical Society and the Meteoritical Society, New York, NY [u.a.] |
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| Übergeordnetes Werk: |
volume:246 ; year:2019 ; day:1 ; month:02 ; pages:86-108 ; extent:23 |
| Links: |
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| DOI / URN: |
10.1016/j.gca.2018.11.032 |
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| Katalog-ID: |
ELV045457247 |
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| 245 | 1 | 0 | |a Fluid inclusion and stable isotopic studies of thermochemical sulfate reduction: Upper permian and lower triassic gasfields, northeast Sichuan Basin, China |
| 264 | 1 | |c 2019transfer abstract | |
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| 520 | |a Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. | ||
| 520 | |a Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. | ||
| 650 | 7 | |a Sichuan Basin |2 Elsevier | |
| 650 | 7 | |a TSR |2 Elsevier | |
| 650 | 7 | |a Hydrogen isotope |2 Elsevier | |
| 650 | 7 | |a Fluid inclusion |2 Elsevier | |
| 650 | 7 | |a Carbonate dissolution |2 Elsevier | |
| 650 | 7 | |a Carbon isotope |2 Elsevier | |
| 700 | 1 | |a George, Simon C. |4 oth | |
| 700 | 1 | |a Cai, Chunfang |4 oth | |
| 700 | 1 | |a Gong, Se |4 oth | |
| 700 | 1 | |a Sestak, Stephen |4 oth | |
| 700 | 1 | |a Armand, Stephane |4 oth | |
| 700 | 1 | |a Zhang, Xuefeng |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier |a Taylor, William R. ELSEVIER |t 109 Discovery of Novel DNA Methylation Markers for the Detection of Colorectal Neoplasia: Selection by Methylome-Wide Analysis |d 2014 |d journal of the Geochemical Society and the Meteoritical Society |g New York, NY [u.a.] |w (DE-627)ELV012653268 |
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10.1016/j.gca.2018.11.032 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001270.pica (DE-627)ELV045457247 (ELSEVIER)S0016-7037(18)30662-8 DE-627 ger DE-627 rakwb eng 610 VZ 570 VZ BIODIV DE-30 fid 35.70 bkl 42.12 bkl 42.15 bkl Li, Kaikai verfasserin aut Fluid inclusion and stable isotopic studies of thermochemical sulfate reduction: Upper permian and lower triassic gasfields, northeast Sichuan Basin, China 2019transfer abstract 23 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. Sichuan Basin Elsevier TSR Elsevier Hydrogen isotope Elsevier Fluid inclusion Elsevier Carbonate dissolution Elsevier Carbon isotope Elsevier George, Simon C. oth Cai, Chunfang oth Gong, Se oth Sestak, Stephen oth Armand, Stephane oth Zhang, Xuefeng oth Enthalten in Elsevier Taylor, William R. ELSEVIER 109 Discovery of Novel DNA Methylation Markers for the Detection of Colorectal Neoplasia: Selection by Methylome-Wide Analysis 2014 journal of the Geochemical Society and the Meteoritical Society New York, NY [u.a.] (DE-627)ELV012653268 volume:246 year:2019 day:1 month:02 pages:86-108 extent:23 https://doi.org/10.1016/j.gca.2018.11.032 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 35.70 Biochemie: Allgemeines VZ 42.12 Biophysik VZ 42.15 Zellbiologie VZ AR 246 2019 1 0201 86-108 23 |
| spelling |
10.1016/j.gca.2018.11.032 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001270.pica (DE-627)ELV045457247 (ELSEVIER)S0016-7037(18)30662-8 DE-627 ger DE-627 rakwb eng 610 VZ 570 VZ BIODIV DE-30 fid 35.70 bkl 42.12 bkl 42.15 bkl Li, Kaikai verfasserin aut Fluid inclusion and stable isotopic studies of thermochemical sulfate reduction: Upper permian and lower triassic gasfields, northeast Sichuan Basin, China 2019transfer abstract 23 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. Sichuan Basin Elsevier TSR Elsevier Hydrogen isotope Elsevier Fluid inclusion Elsevier Carbonate dissolution Elsevier Carbon isotope Elsevier George, Simon C. oth Cai, Chunfang oth Gong, Se oth Sestak, Stephen oth Armand, Stephane oth Zhang, Xuefeng oth Enthalten in Elsevier Taylor, William R. ELSEVIER 109 Discovery of Novel DNA Methylation Markers for the Detection of Colorectal Neoplasia: Selection by Methylome-Wide Analysis 2014 journal of the Geochemical Society and the Meteoritical Society New York, NY [u.a.] (DE-627)ELV012653268 volume:246 year:2019 day:1 month:02 pages:86-108 extent:23 https://doi.org/10.1016/j.gca.2018.11.032 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 35.70 Biochemie: Allgemeines VZ 42.12 Biophysik VZ 42.15 Zellbiologie VZ AR 246 2019 1 0201 86-108 23 |
| allfields_unstemmed |
10.1016/j.gca.2018.11.032 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001270.pica (DE-627)ELV045457247 (ELSEVIER)S0016-7037(18)30662-8 DE-627 ger DE-627 rakwb eng 610 VZ 570 VZ BIODIV DE-30 fid 35.70 bkl 42.12 bkl 42.15 bkl Li, Kaikai verfasserin aut Fluid inclusion and stable isotopic studies of thermochemical sulfate reduction: Upper permian and lower triassic gasfields, northeast Sichuan Basin, China 2019transfer abstract 23 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. Sichuan Basin Elsevier TSR Elsevier Hydrogen isotope Elsevier Fluid inclusion Elsevier Carbonate dissolution Elsevier Carbon isotope Elsevier George, Simon C. oth Cai, Chunfang oth Gong, Se oth Sestak, Stephen oth Armand, Stephane oth Zhang, Xuefeng oth Enthalten in Elsevier Taylor, William R. ELSEVIER 109 Discovery of Novel DNA Methylation Markers for the Detection of Colorectal Neoplasia: Selection by Methylome-Wide Analysis 2014 journal of the Geochemical Society and the Meteoritical Society New York, NY [u.a.] (DE-627)ELV012653268 volume:246 year:2019 day:1 month:02 pages:86-108 extent:23 https://doi.org/10.1016/j.gca.2018.11.032 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 35.70 Biochemie: Allgemeines VZ 42.12 Biophysik VZ 42.15 Zellbiologie VZ AR 246 2019 1 0201 86-108 23 |
| allfieldsGer |
10.1016/j.gca.2018.11.032 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001270.pica (DE-627)ELV045457247 (ELSEVIER)S0016-7037(18)30662-8 DE-627 ger DE-627 rakwb eng 610 VZ 570 VZ BIODIV DE-30 fid 35.70 bkl 42.12 bkl 42.15 bkl Li, Kaikai verfasserin aut Fluid inclusion and stable isotopic studies of thermochemical sulfate reduction: Upper permian and lower triassic gasfields, northeast Sichuan Basin, China 2019transfer abstract 23 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. Sichuan Basin Elsevier TSR Elsevier Hydrogen isotope Elsevier Fluid inclusion Elsevier Carbonate dissolution Elsevier Carbon isotope Elsevier George, Simon C. oth Cai, Chunfang oth Gong, Se oth Sestak, Stephen oth Armand, Stephane oth Zhang, Xuefeng oth Enthalten in Elsevier Taylor, William R. ELSEVIER 109 Discovery of Novel DNA Methylation Markers for the Detection of Colorectal Neoplasia: Selection by Methylome-Wide Analysis 2014 journal of the Geochemical Society and the Meteoritical Society New York, NY [u.a.] (DE-627)ELV012653268 volume:246 year:2019 day:1 month:02 pages:86-108 extent:23 https://doi.org/10.1016/j.gca.2018.11.032 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 35.70 Biochemie: Allgemeines VZ 42.12 Biophysik VZ 42.15 Zellbiologie VZ AR 246 2019 1 0201 86-108 23 |
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We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. Sichuan Basin Elsevier TSR Elsevier Hydrogen isotope Elsevier Fluid inclusion Elsevier Carbonate dissolution Elsevier Carbon isotope Elsevier George, Simon C. oth Cai, Chunfang oth Gong, Se oth Sestak, Stephen oth Armand, Stephane oth Zhang, Xuefeng oth Enthalten in Elsevier Taylor, William R. ELSEVIER 109 Discovery of Novel DNA Methylation Markers for the Detection of Colorectal Neoplasia: Selection by Methylome-Wide Analysis 2014 journal of the Geochemical Society and the Meteoritical Society New York, NY [u.a.] (DE-627)ELV012653268 volume:246 year:2019 day:1 month:02 pages:86-108 extent:23 https://doi.org/10.1016/j.gca.2018.11.032 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 35.70 Biochemie: Allgemeines VZ 42.12 Biophysik VZ 42.15 Zellbiologie VZ AR 246 2019 1 0201 86-108 23 |
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Enthalten in 109 Discovery of Novel DNA Methylation Markers for the Detection of Colorectal Neoplasia: Selection by Methylome-Wide Analysis New York, NY [u.a.] volume:246 year:2019 day:1 month:02 pages:86-108 extent:23 |
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fluid inclusion and stable isotopic studies of thermochemical sulfate reduction: upper permian and lower triassic gasfields, northeast sichuan basin, china |
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Fluid inclusion and stable isotopic studies of thermochemical sulfate reduction: Upper permian and lower triassic gasfields, northeast Sichuan Basin, China |
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Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. |
| abstractGer |
Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. |
| abstract_unstemmed |
Fluid inclusions hosted in different stages of TSR-derived diagenetic minerals are expected to record compositions and isotopes of paleo-fluids at the time of trapping during different TSR extents. Here we report the first set of data on carbon isotopes of CH4 and CO2 and hydrogen isotopes of H2O trapped in fluid inclusions in TSR calcites. We find that the NE Sichuan sour dolostones have initially experienced oil- and wet gas-dominated TSR, as recorded in H2S-bearing oil inclusions with lower homogenization temperatures (T h) values (e.g., ≤137 °C) and the coexistence of C2+ hydrocarbon gas and H2S in fluid inclusions. The subsequent dry gas-dominated TSR occurred in higher reservoir temperatures (> about 161.5 °C) when most C2+ hydrocarbons were exhausted. The three-stage TSR resulted in CH4 δ13C values becoming progressively heavier from −46.7‰ to −29.6‰, H2O δ2H values shifting negatively from −36.4‰ to −67.8‰ and salinities decreasing to as low as 0.9 wt% NaCl. The dry gas-dominated TSR reaction seems to be the most efficient at water production, which, however, was limited by available reactive sulfate, and shows significant differences within the reef and shoal reservoirs along the platform margin, and the anhydrite-bearing reservoirs in the paleo-lagoon area. The TSR reaction within the porous shelf-margin reservoirs is capable of causing carbonate dissolution owing to high porosity and good connectivity of the micropore network and the resulting mass transport away from TSR sites. This resulted in CO2 δ13C positive shift from −9.3‰ to +6.3‰, and a positive correlation of this parameter with T h. In contrast, in the tight anhydrite-bearing reservoirs, slow mass transport and quick saturation of calcium and dissolved CO2 in the pore waters is expected to precipitate TSR calcite near the anhydrite crystals, resulting in calcite crystals having more depleted δ13C values (−1.4‰ to −18.9‰). This study shows that there are essential differences in the process and effects of TSR reaction due to geological differences in the settings of TSR sites. |
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| title_short |
Fluid inclusion and stable isotopic studies of thermochemical sulfate reduction: Upper permian and lower triassic gasfields, northeast Sichuan Basin, China |
| url |
https://doi.org/10.1016/j.gca.2018.11.032 |
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George, Simon C. Cai, Chunfang Gong, Se Sestak, Stephen Armand, Stephane Zhang, Xuefeng |
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George, Simon C. Cai, Chunfang Gong, Se Sestak, Stephen Armand, Stephane Zhang, Xuefeng |
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10.1016/j.gca.2018.11.032 |
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