Origin Energy Resources Ltd contracted Haines Surveys to acquire gravity data over the very south east of petroleum exploration licence PEL57 during 2002. This was completed in 2 phases. Phase 1 during April- May 2002 recorded 555 new gravity stations while Phase 2 during Oct-Nov 2002 acquired a further 196 stations although the majority of these were collected in PEP 151(Victoria). The survey was designed to provide high resolution gravity data over a Warre Sandstone lead called the Summer Hill prospect, located approximately 30 kilometres south east of Mt Gambier. The Summer Hill Gravity Survey was interpreted to have been successful in detailing the Summer Hill gravity high with the structural crest located largely within the PEL 57 licence area.