Generation of isotopically and compositionally distinct water during thermochemical sulfate reduction (TSR) in carbonate reservoirs: Triassic Feixianguan Formation, Sichuan Basin, China
Thermochemical sulfate reduction (TSR), the reaction of petroleum with anhydrite in reservoirs resulting in the growth of calcite and the accumulation of H2S, has been documented in the Feixianguan Formation dolomite reservoir in the Sichuan Basin, China. Fluid inclusion salinity and homogenization...
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ftunivliverpool:oai:livrepository.liverpool.ac.uk:2016868 |
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Open Polar |
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The University of Liverpool Repository |
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ftunivliverpool |
language |
English |
description |
Thermochemical sulfate reduction (TSR), the reaction of petroleum with anhydrite in reservoirs resulting in the growth of calcite and the accumulation of H2S, has been documented in the Feixianguan Formation dolomite reservoir in the Sichuan Basin, China. Fluid inclusion salinity and homogenization temperature data have shown that TSR results in a decrease in salinity from a pre-TSR value of 25 wt. % down to 5 wt. % as a result of water created as a byproduct of progressive TSR. We have studied the isotopic character of the water that resulted from TSR in the Feixianguan Formation by analyzing the oxygen isotopes of TSR calcite and determining the oxygen isotopes of the water in equilibrium with the TSR calcite at the temperatures determined by aqueous fluid inclusion analysis. We have compared these TSR-waters to water that would have been in equilibrium with the bulk rock, also at the temperatures determined by aqueous fluid inclusion analysis. We have found that the TSR-waters are relatively depleted in oxygen isotopes (by up to 8‰ compared to what would be expected at equilibrium between the bulk rock and water) since this type of water was specifically derived from anhydrite. The generation of relatively large volumes of low salinity, low δ18O water associated with advanced TSR in the Feixianguan Formation has also been reported in the Permian Khuff Formation in Abu Dhabi and from sour Devonian fields in the Western Canada Basin. This suggests that TSR-derived water may be a common phenomenon, the effects of which on mesogenetic secondary porosity and reservoir quality have previously been underappreciated. |
format |
Article in Journal/Newspaper |
author |
Jiang, Lei Worden, Richard Cai, Chunfang |
spellingShingle |
Jiang, Lei Worden, Richard Cai, Chunfang Generation of isotopically and compositionally distinct water during thermochemical sulfate reduction (TSR) in carbonate reservoirs: Triassic Feixianguan Formation, Sichuan Basin, China |
author_facet |
Jiang, Lei Worden, Richard Cai, Chunfang |
author_sort |
Jiang, Lei |
title |
Generation of isotopically and compositionally distinct water during thermochemical sulfate reduction (TSR) in carbonate reservoirs: Triassic Feixianguan Formation, Sichuan Basin, China |
title_short |
Generation of isotopically and compositionally distinct water during thermochemical sulfate reduction (TSR) in carbonate reservoirs: Triassic Feixianguan Formation, Sichuan Basin, China |
title_full |
Generation of isotopically and compositionally distinct water during thermochemical sulfate reduction (TSR) in carbonate reservoirs: Triassic Feixianguan Formation, Sichuan Basin, China |
title_fullStr |
Generation of isotopically and compositionally distinct water during thermochemical sulfate reduction (TSR) in carbonate reservoirs: Triassic Feixianguan Formation, Sichuan Basin, China |
title_full_unstemmed |
Generation of isotopically and compositionally distinct water during thermochemical sulfate reduction (TSR) in carbonate reservoirs: Triassic Feixianguan Formation, Sichuan Basin, China |
title_sort |
generation of isotopically and compositionally distinct water during thermochemical sulfate reduction (tsr) in carbonate reservoirs: triassic feixianguan formation, sichuan basin, china |
publishDate |
2015 |
url |
http://livrepository.liverpool.ac.uk/2016868/ https://doi.org/10.1016/j.gca.2015.05.033 http://livrepository.liverpool.ac.uk/2016868/1/Jiang%202015%20GCA%20water%20isotopes%20and%20salinity.pdf http://livrepository.liverpool.ac.uk/2016868/2/2017-05-12T11%3A20%3A20Z.atom http://livrepository.liverpool.ac.uk/2016868/3/2017-05-12T12%3A19%3A11Z.atom http://livrepository.liverpool.ac.uk/2016868/4/2017-05-12T13%3A18%3A34Z.atom http://livrepository.liverpool.ac.uk/2016868/5/2017-05-12T14%3A18%3A25Z.atom http://livrepository.liverpool.ac.uk/2016868/6/2017-05-12T15%3A18%3A38Z.atom http://livrepository.liverpool.ac.uk/2016868/7/2017-05-12T16%3A18%3A53Z.atom http://livrepository.liverpool.ac.uk/2016868/8/2017-05-12T17%3A18%3A36Z.atom http://livrepository.liverpool.ac.uk/2016868/9/2017-05-12T18%3A19%3A01Z.atom http://livrepository.liverpool.ac.uk/2016868/10/2017-05-12T19%3A18%3A50Z.atom http://livrepository.liverpool.ac.uk/2016868/11/2017-05-12T20%3A18%3A58Z.atom http://livrepository.liverpool.ac.uk/2016868/12/2017-05-12T21%3A19%3A14Z.atom http://livrepository.liverpool.ac.uk/2016868/13/2017-05-12T22%3A19%3A53Z.atom http://livrepository.liverpool.ac.uk/2016868/14/2017-05-12T23%3A24%3A39Z.atom http://livrepository.liverpool.ac.uk/2016868/15/2017-05-13T01%3A20%3A10Z.atom http://livrepository.liverpool.ac.uk/2016868/16/2017-05-13T02%3A19%3A39Z.atom http://livrepository.liverpool.ac.uk/2016868/17/2017-05-13T03%3A19%3A42Z.atom http://livrepository.liverpool.ac.uk/2016868/18/2017-05-13T04%3A38%3A17Z.atom http://livrepository.liverpool.ac.uk/2016868/19/2017-05-13T05%3A19%3A32Z.atom http://livrepository.liverpool.ac.uk/2016868/20/2017-05-13T06%3A18%3A53Z.atom http://livrepository.liverpool.ac.uk/2016868/21/2017-05-13T07%3A19%3A17Z.atom http://livrepository.liverpool.ac.uk/2016868/22/2017-05-13T08%3A19%3A40Z.atom http://livrepository.liverpool.ac.uk/2016868/23/2017-05-13T09%3A18%3A49Z.atom |
geographic |
Canada |
geographic_facet |
Canada |
genre |
canada basin |
genre_facet |
canada basin |
op_relation |
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Geochimica et Cosmochimica Acta |
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165 |
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262 |
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ftunivliverpool:oai:livrepository.liverpool.ac.uk:2016868 2023-05-15T15:48:48+02:00 Generation of isotopically and compositionally distinct water during thermochemical sulfate reduction (TSR) in carbonate reservoirs: Triassic Feixianguan Formation, Sichuan Basin, China Jiang, Lei Worden, Richard Cai, Chunfang 2015-09-15 text application/atom+xml http://livrepository.liverpool.ac.uk/2016868/ https://doi.org/10.1016/j.gca.2015.05.033 http://livrepository.liverpool.ac.uk/2016868/1/Jiang%202015%20GCA%20water%20isotopes%20and%20salinity.pdf http://livrepository.liverpool.ac.uk/2016868/2/2017-05-12T11%3A20%3A20Z.atom http://livrepository.liverpool.ac.uk/2016868/3/2017-05-12T12%3A19%3A11Z.atom http://livrepository.liverpool.ac.uk/2016868/4/2017-05-12T13%3A18%3A34Z.atom http://livrepository.liverpool.ac.uk/2016868/5/2017-05-12T14%3A18%3A25Z.atom http://livrepository.liverpool.ac.uk/2016868/6/2017-05-12T15%3A18%3A38Z.atom http://livrepository.liverpool.ac.uk/2016868/7/2017-05-12T16%3A18%3A53Z.atom http://livrepository.liverpool.ac.uk/2016868/8/2017-05-12T17%3A18%3A36Z.atom http://livrepository.liverpool.ac.uk/2016868/9/2017-05-12T18%3A19%3A01Z.atom http://livrepository.liverpool.ac.uk/2016868/10/2017-05-12T19%3A18%3A50Z.atom http://livrepository.liverpool.ac.uk/2016868/11/2017-05-12T20%3A18%3A58Z.atom http://livrepository.liverpool.ac.uk/2016868/12/2017-05-12T21%3A19%3A14Z.atom http://livrepository.liverpool.ac.uk/2016868/13/2017-05-12T22%3A19%3A53Z.atom http://livrepository.liverpool.ac.uk/2016868/14/2017-05-12T23%3A24%3A39Z.atom http://livrepository.liverpool.ac.uk/2016868/15/2017-05-13T01%3A20%3A10Z.atom http://livrepository.liverpool.ac.uk/2016868/16/2017-05-13T02%3A19%3A39Z.atom http://livrepository.liverpool.ac.uk/2016868/17/2017-05-13T03%3A19%3A42Z.atom http://livrepository.liverpool.ac.uk/2016868/18/2017-05-13T04%3A38%3A17Z.atom http://livrepository.liverpool.ac.uk/2016868/19/2017-05-13T05%3A19%3A32Z.atom http://livrepository.liverpool.ac.uk/2016868/20/2017-05-13T06%3A18%3A53Z.atom http://livrepository.liverpool.ac.uk/2016868/21/2017-05-13T07%3A19%3A17Z.atom http://livrepository.liverpool.ac.uk/2016868/22/2017-05-13T08%3A19%3A40Z.atom http://livrepository.liverpool.ac.uk/2016868/23/2017-05-13T09%3A18%3A49Z.atom en eng http://livrepository.liverpool.ac.uk/2016868/1/Jiang%202015%20GCA%20water%20isotopes%20and%20salinity.pdf http://livrepository.liverpool.ac.uk/2016868/2/2017-05-12T11%3A20%3A20Z.atom http://livrepository.liverpool.ac.uk/2016868/3/2017-05-12T12%3A19%3A11Z.atom http://livrepository.liverpool.ac.uk/2016868/4/2017-05-12T13%3A18%3A34Z.atom http://livrepository.liverpool.ac.uk/2016868/5/2017-05-12T14%3A18%3A25Z.atom http://livrepository.liverpool.ac.uk/2016868/6/2017-05-12T15%3A18%3A38Z.atom http://livrepository.liverpool.ac.uk/2016868/7/2017-05-12T16%3A18%3A53Z.atom http://livrepository.liverpool.ac.uk/2016868/8/2017-05-12T17%3A18%3A36Z.atom http://livrepository.liverpool.ac.uk/2016868/9/2017-05-12T18%3A19%3A01Z.atom http://livrepository.liverpool.ac.uk/2016868/10/2017-05-12T19%3A18%3A50Z.atom http://livrepository.liverpool.ac.uk/2016868/11/2017-05-12T20%3A18%3A58Z.atom http://livrepository.liverpool.ac.uk/2016868/12/2017-05-12T21%3A19%3A14Z.atom http://livrepository.liverpool.ac.uk/2016868/13/2017-05-12T22%3A19%3A53Z.atom http://livrepository.liverpool.ac.uk/2016868/14/2017-05-12T23%3A24%3A39Z.atom http://livrepository.liverpool.ac.uk/2016868/15/2017-05-13T01%3A20%3A10Z.atom http://livrepository.liverpool.ac.uk/2016868/16/2017-05-13T02%3A19%3A39Z.atom http://livrepository.liverpool.ac.uk/2016868/17/2017-05-13T03%3A19%3A42Z.atom http://livrepository.liverpool.ac.uk/2016868/18/2017-05-13T04%3A38%3A17Z.atom http://livrepository.liverpool.ac.uk/2016868/19/2017-05-13T05%3A19%3A32Z.atom http://livrepository.liverpool.ac.uk/2016868/20/2017-05-13T06%3A18%3A53Z.atom http://livrepository.liverpool.ac.uk/2016868/21/2017-05-13T07%3A19%3A17Z.atom http://livrepository.liverpool.ac.uk/2016868/22/2017-05-13T08%3A19%3A40Z.atom http://livrepository.liverpool.ac.uk/2016868/23/2017-05-13T09%3A18%3A49Z.atom Jiang, Lei, Worden, Richard orcid:0000-0002-4686-9428 and Cai, Chunfang (2015) Generation of isotopically and compositionally distinct water during thermochemical sulfate reduction (TSR) in carbonate reservoirs: Triassic Feixianguan Formation, Sichuan Basin, China. Geochimica et Cosmochimica Acta, 165. 249 - 262. Article PeerReviewed 2015 ftunivliverpool https://doi.org/10.1016/j.gca.2015.05.033 2022-04-28T22:26:02Z Thermochemical sulfate reduction (TSR), the reaction of petroleum with anhydrite in reservoirs resulting in the growth of calcite and the accumulation of H2S, has been documented in the Feixianguan Formation dolomite reservoir in the Sichuan Basin, China. Fluid inclusion salinity and homogenization temperature data have shown that TSR results in a decrease in salinity from a pre-TSR value of 25 wt. % down to 5 wt. % as a result of water created as a byproduct of progressive TSR. We have studied the isotopic character of the water that resulted from TSR in the Feixianguan Formation by analyzing the oxygen isotopes of TSR calcite and determining the oxygen isotopes of the water in equilibrium with the TSR calcite at the temperatures determined by aqueous fluid inclusion analysis. We have compared these TSR-waters to water that would have been in equilibrium with the bulk rock, also at the temperatures determined by aqueous fluid inclusion analysis. We have found that the TSR-waters are relatively depleted in oxygen isotopes (by up to 8‰ compared to what would be expected at equilibrium between the bulk rock and water) since this type of water was specifically derived from anhydrite. The generation of relatively large volumes of low salinity, low δ18O water associated with advanced TSR in the Feixianguan Formation has also been reported in the Permian Khuff Formation in Abu Dhabi and from sour Devonian fields in the Western Canada Basin. This suggests that TSR-derived water may be a common phenomenon, the effects of which on mesogenetic secondary porosity and reservoir quality have previously been underappreciated. Article in Journal/Newspaper canada basin The University of Liverpool Repository Canada Geochimica et Cosmochimica Acta 165 249 262 |