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Coal Seam Gas Water from Maramarua, New Zealand: Characterisation and Comparison to United States Analogues

Taulis, Mauricio & Milke, M (2007) Coal Seam Gas Water from Maramarua, New Zealand: Characterisation and Comparison to United States Analogues. Journal of Hydrology, 46(1), pp. 1-17.

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Abstract

Groundwater from Maramarua has been identified as coal seam gas (CSG) water by studying its composition, and comparing it against the geochemical signature from other CSG basins. CSG is natural gas that has been produced through thermogenic and biogenic processes in underground coal seams; CSG extraction requires the abstraction of significant amounts of CSG water. To date, no international literature has described coal seam gas water in New Zealand, however recent CSG exploration work has resulted in CSG water quality data from a coal seam in Maramarua, New Zealand. Water quality from this site closely follows the geochemical signature associated with United States CSG waters, and this has helped to characterise the type of water being abstracted. CSG water from this part of Maramarua has low calcium, magnesium, and sulphate concentrations but high sodium (334 mg/l), chloride (146 mg/l) and bicarbonate (435 mg/l) concentrations. In addition, this water has high pH (7.8) and alkalinity (360 mg/l as CaCO3), which is a direct consequence of carbonate dissolution and biogenic processes. Different analyte ratios ('source-rock deduction' method) have helped to identify the different formation processes responsible in shaping Maramarua CSG water

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6 citations in Scopus
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ID Code: 38133
Item Type: Journal Article
Additional URLs:
Keywords: coalbed methane, water quality- New Zealand, groundwater - New Zealand, Maramarua ( NZ), Coal Seam Gas
ISSN: 0022-1708
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > PHYSICAL GEOGRAPHY AND ENVIRONMENTAL GEOSCIENCE (040600) > Hydrogeology (040603)
Divisions: Past > Schools > Biogeoscience
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Deposited On: 22 Oct 2010 13:58
Last Modified: 18 Jun 2011 00:59

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