April 19 (Reuters) - Woodside Petroleum Ltd WPL.AX :
* Qtrly production volumes decreased 4.8% from previous quarter
* Qtrly sales revenue $982 mln vs $1.41 bln
* Qtrly sales volumes increased 1.3%, predominantly reflecting the timing of LNG shipments
* Qtrly production 23.7 mmboe vs 21.8 mmboe; Qtrly sales 24.2 mmboe vs 23.9 mmboe
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