Publication Name: Western Australian Basins Symposium
Authors: G. K. Ellis
Date Published: August 2013
Number of Pages: 20
Abstract:
Late authigenic pyrite cementation is common to abundant in the Middle Jurassic Laminaria and Plover Formation sandstone in numerous wells on the Laminaria High and in the Vulcan Sub-basin of the northern Bonaparte Basin. Pyrite cementation developed in these reservoirs by reduction of formation water sulphate in the presence of migrating and/or entrapped oil followed by the reaction of iron with the resultant hydrogen sulphide. Sulphate reduction is considered to be most likely by sulphate-reducing microorganisms, which utilise hydrocarbons for their metabolism.