THE NORTHERN PERTH BASIN—FROM MARGINALLY PROSPECTIVE FOR GAS TO HIGHLY PROSPECTIVE FOR BOTH OIL AND GAS

Abstract

Recent discoveries of gas in the Wagina Formation by Beharra Springs North–1, in the High Cliff Sandstone by Hovea–2, and of oil in the Dongara Sandstone by Hovea–1, Jingemia–1 and Eremia–1, have changed the perception of the northern Perth Basin from being marginally prospective for gas to one that is highly prospective for both oil and gas. Enhanced quality of 3D seismic over 2D, an analysis of regional gravity data, and in-house reservoir and source rock studies have all played a part in these discoveries. Hovea–2 is significant in that it flowed gas at commercial rates from the Lower Permian High Cliff Sandstone, the first well in the basin to do so from this reservoir. A program involving extensive additional 3D seismic and as many as six exploration wells is planned for 2004, offering the potential for further significant hydrocarbon discoveries.