The geological complexity and product mix of the Hawkville field in addition to acreage relinquishments and amended development plans were the main contributors.
The remainder of the charge relates to the impairment of goodwill associated with the Petrohawk acquisition.
The charge will be included in BHP's 2015 financial year results, and therafter the onshore US business will have net operating assets of US$24 billion, excluding US$4 billion of deferred tax liability.
Ongoing
