Detailed lineament analysis of the Cooper Basin area has established the presence of two lineament networks. A gas-prone network of NW and NE trending lineaments shows strong correlation with the presence of gas in alternating blocks, but no gas occurs on or near the lineaments themselves. A Tethyan primary and orthogonal network of WNW and NNE trending lineaments similarly has no hydrocarbon occurrences at lineament intersections. Some significant oil fields do lie on 300 degrees True trending lineaments, however, 290 degrees True trending lineaments are unprospective along their entire length. It has proven too difficult to correlate any of the lineament attributes to the DST results or CO2 content of Cooper Basin gas fields, primarily because of the many uncertainties encountered in working with these data. Some of the many abandoned exploration and development wells within the study area nevertheless show good correlations with certain lineaments, so these locales should perhaps be avoided by future drilling.