Of the 41 recognised fault and stratigraphic plays drilled in the Cooper Basin, 18 were originally proposed as fault plays, 12 as facies-change plays and 11 as unconformity plays. No diagenetic or palaeogeomorphic plays have been proposed to date. If the above 41 plays are re-classified according to current definitions of major-play type, then 19 fault, 3 facies-change and 18 unconformity plays would be defined. Success rates under this re-classification would range from a healthy 33% for unconformity plays (6/18 wells), to a less successful 21% for fault plays (4/19) and a disappointing 0% for facies-change plays (0/3). The remaining 30 wells were dry. Unconformity plays (both onlap above and truncation below) have in general been the most successful, most productive and therefore the lowest risk plays compared with all other unconventional plays drilled to date in the Cooper Basin. The results of the 19 fault plays drilled to date in the Cooper Basin have, in actual fact, been quite disappointing. Despite the 21% success rate for such plays noted above, flow rates from the relevant wells were often low, often from single sands, and with subsequent production problems encountered in most cases. Such plays have to date also added little in the way of reserves. Many fault plays, successful or otherwise, were drilled too deep, particularly for the Tirrawarra Sandstone. Future fault plays in the basin need to be drilled shallower, preferably with a lateral basement seal. A total of 141 prospects and leads in the Santos Cooper Basin database are either fault or stratigraphic plays, made up of 76 fault, 9 facies-change and 56 unconformity plays. All have been risked and ranked in terms of both expected reserves and perceived risk. However, ample opportunity exists for further fault and stratigraphic prospects and leads to be generated in the Cooper Basin. All potential plays should be covered by the 20 specific play types outlined in this report, these specific play types being the three major play types already mentioned, broken up on the basis of primary Permian target. Seven specific play types (of the total of 20) are, in fact, the ones presently considered to have the most potential for future exploration within the Cooper Basin: these being 5 of the 11 possible unconformity play types, and 2 of the 6 possible fault play types illustrated within the report. Controls on their distribution have been described in a regional sense, with four regions outlined for future geophysical mapping priority.