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Australian Energy Producers Journal Australian Energy Producers Journal Society
Journal of Australian Energy Producers
RESEARCH ARTICLE (Non peer reviewed)

Origins of hydrogen sulfide (H2S) in gas reservoirs by isotopic analyses: the mitigation of operation risks

Gareth R. L. Chalmers A * , Amanda A. Bustin B , Andrea Sanlorenzo B and R. Marc Bustin B
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- Author Affiliations

A University of the Sunshine Coast, Sippy Downs, Qld, Australia.

B University of British Columbia, Vancouver, BC, Canada.

* Correspondence to: gchalmers@usc.edu.au

The APPEA Journal 62 S400-S405 https://doi.org/10.1071/AJ21020
Accepted: 11 February 2022   Published: 13 May 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing on behalf of APPEA.

Abstract

The distribution and origin of hydrogen sulfide (H2S) within gas reservoirs is an important issue due to its toxicity and ability to corrode metal infrastructure, even at low concentrations (i.e. 50 ppm). H2S gas is regarded as a high priority for health and safety at drilling sites. The distribution of H2S, in some basins, can be inexplicable with a mix of sweet (no H2S) and sour (contains H2S) wells within one multi-well pad. Sour gas is a concern in some gas and coal fields in Australia which include Gippsland, Bowen and Cooper-Eromanga basins as well as in the North West Shelf with typical concentrations below 10 000 ppm. For example, the German Creek Formation (Bowen Basin) contains up to 77 ppm of H2S gas and coal seam gas producers will need to perform a risk assessment while exploring and developing this resource. There are multiple sources of H2S gas sulfur and this includes sulfate minerals, pyrite, organic sulfur or from frack water. This research utilises the isotopic variation in the sulfur and oxygen of potential sources, coupled with petrological analyses to determine H2S gas generation. Data is used to predict the gas distribution within the reservoirs to reduce exploration risks. One initial study on the Triassic Montney Formation in western Canada produces H2S gas at concentrations up to 220 000 ppm. Isotopic analyses suggest that the H2S is generated from either Triassic sulfates or a mixture of Triassic and Devonian sources and not solely from Devonian rocks as first expected.

Keywords: environmental geology, hydrogen sulphide gas, isotopic analyses, Montney Formation, risking, sedimentology, sulfur​ isotopes, unconventional gas, well planning.

Gareth R. L. Chalmers is a Lecturer at the University of the Sunshine Coast and is researching Australian gas reservoirs. He has over 15 years’ experience in coal and shale geology. His MSc (Newcastle University, 2001) expanded sequence stratigraphy into non-marine coal-bearing strata by correlating significant surfaces identified through organic petrology of an amalgamated coal seam. Gareth then completed his PhD at the University of British Columbia, Canada (2007) where he used a multidisciplinary approach incorporating organic geochemistry, petrology, sedimentology and mineralogy to investigate the geology of shale gas resources. He continued research at UBC as Postdoctoral Fellow and evaluated four shale formations in North America. Gareth then joined Shell Canada (Calgary, 2013) to gain industry experience in developing the Duvernay gas shale play. Gareth is currently investigating the origin and distribution of toxic H2S gas within the Montney Formation in western Canada.

Dr Amanda Bustin is a research associate at the University of British Columbia, the vice president of engineering for Renewable GeoResources Ltd, and the president of Bustin Earth Science Consultants. Amanda holds degrees in geological engineering (BASc 2001) from the University of British Columbia and a PhD (2006) in geophysics from the University of Victoria. She is currently working as a researcher and professional consultant on a variety of unconventional oil and gas, renewable energy, and energy transition projects, with the main focus on energy resource development and hazard prevention and mitigation.

Andrea Sanlorenzo is pursuing an MSc in Geological Sciences at the University of British Columbia, under the supervision of Dr R. Marc Bustin. His current research focus on the petrophysics, carbon dioxide sequestration, and storage capacity of the Montney Formation in Alberta and British Columbia, Canada, with associated enhanced oil and condensate recovery potential. He also worked as a lab assistant within the Unconventional Resources Laboratory at the University of British Columbia, learning how to fingerprint H2S gas sources in reservoirs through elemental isotopic analysis, and helped to better characterise the Montney and Duvernay (Alberta) source rocks. Andrea is a registered geoscientist-in-training (GIT) in the province of British Columbia.

Dr R. Marc Bustin is Professor of petroleum and coal geology in the Department of Earth and Ocean Sciences at the University of British Columbia (UBC) with over 35 years’ worldwide experience in oil and gas exploration and exploitation in industry, research and consultancy. He has published over 220 peer reviewed articles on fossil fuels and renewable resources. He received his PhD in geology (1980) from UBC and is a registered Professional Geoscientist (BC). Dr Bustin is the recipient of the A. L. Leverson memorial award from the American Association of Petroleum Geology, received the Thiesson Medal from the International Committee for Coal and Organic Petrography, the Sproule Award and the Gilbert H. Cady Award from the Geological Society of America and the Medal of Merit from the Canadian Society of Petroleum Geology. Bustin is an elected Fellow of the Royal Society of Canada.


References

Claypool GE, Holser WT, Kaplan IR, Sakai H, Zak I (1980) The age curves of sulfur and oxygen isotopes in marine sulfate and their mutual interpretation. Chemical Geology 28, 199–260.
The age curves of sulfur and oxygen isotopes in marine sulfate and their mutual interpretation.Crossref | GoogleScholarGoogle Scholar |

Desrocher S (1997) Isotopic and Compositional Characterization of Natural Gases in the Lower and Middle Triassic Montney, Halfway, and Doig Formations, Alberta Basin. MSc thesis, Department of Geology and Geophysics, University of Calgary, Alberta.
| Crossref |

Edwards D, Barclay J, Gibson D, Kvill G, Halton E (1994) Chapter 16 – Triassic strata of the western Canada sedimentary basin. In ‘Geological atlas of the Western Canada Sedimentary Basin’. (Eds GD Mossop, I Shetsen) pp. 259–275. (Canadian Society of Petroleum Geologists and Alberta Research Council: Calgary, Alberta). Available at https://ags.aer.ca/atlas-the-western-canada-sedimentary-basin/chapter-16-triassic-strata

Gillies ADS, Wu HW, Kizil MS, Harvey T (2000) The Mining Challenge of Coal Seam Hydrogen Sulphide. In ‘Proceedings, Queensland Mining Industry Health and Safety Conference’, A New Era in Mine Health and Safety Management Townsville, August 2000. pp. 375–385. Available at https://www.qmihsconference.org.au/wp-content/uploads/qmihsc-2000-writtenpaper-gillies.pdf

Krouse HR, Viau CA, Eliuk LS, Ueda A, Halas S (1988) Chemical and isotopic evidence of thermochemical sulphate reduction by light hydrocarbon gases in deep carbonate reservoirs. Nature, 333, 415–419.
Chemical and isotopic evidence of thermochemical sulphate reduction by light hydrocarbon gases in deep carbonate reservoirs.Crossref | GoogleScholarGoogle Scholar |

Machel HG (1985) Facies and diagenesis of the Upper Devonian Nisku Formation in the subsurface of central Alberta. PhD thesis, Department of Geological Sciences, McGill University. Available at https://escholarship.mcgill.ca/concern/theses/rn301203s

Munson EO, Chalmers GRL, Bustin RM, Li K (2016) Utilizing smear mounts for X-ray diffraction as a fully quantitative approach in rapidly characterizing the mineralogy of shale gas reservoirs. Journal of Unconventional Oil and Gas Resources 14, 22–31.
Utilizing smear mounts for X-ray diffraction as a fully quantitative approach in rapidly characterizing the mineralogy of shale gas reservoirs.Crossref | GoogleScholarGoogle Scholar |

NEB (National Energy Board) (2018) ‘Canada’s energy future 2018 supplement: Natural gas production.’ p. 12. (National Energy Board: Calgary, Alberta)

Phillips R, Smith JW, Byrnes R (1990) Hydrogen sulphide gas occurrence at Southern Colliery. In ‘Proceedings of the Bowen Basin Symposium, Geological Society of Australia, GSA ’​90’. pp. 91–97. (Geological Society of Australia, Queensland)

Rietveld HM (1967) Line profiles of neutron powder-diffraction peaks for structure refinement. Acta Crystallographica 22, 151–152.
Line profiles of neutron powder-diffraction peaks for structure refinement.Crossref | GoogleScholarGoogle Scholar |

Ryan M, Harvey T, Bride J, Kizil M (1998) Report on hydrogen sulphide experience at Southern Colliery. In ‘Proceedings of the 1998 Coal Operators’ Conference, Mining Engineering, University of Wollongong, 18–20 February 1998’. (Eds N Aziz, B Kininmonth) Available at https://ro.uow.edu.au/coal/293 [verified 7 February 2022]

Sharma G (1969) Paragenetic evolution in Peejay field, British Columbia, Canada. Mineralium Deposita 4, 346–354.
Paragenetic evolution in Peejay field, British Columbia, Canada.Crossref | GoogleScholarGoogle Scholar |