ABSTRACT

The Beetaloo Sub-basin in central Northern Territory, Australia, is a promising region, estimated to contain upwards of 500 trillion cubic feet of gas resources (Northern Territory Government 2023). Empire Energy Group Limited, a key operator in the Beetaloo, has been advancing its assets towards production, focusing on cost reduction and operational efficiency. This paper discusses the significant reduction in drilling costs achieved through lessons learned and innovative solutions implemented over the past 5 years. inGauge Energy, Australia’s largest onshore drilling and completions consultancy, has been pivotal in supporting Empire Energy’s operations. The cost of drilling Carpentaria wells has decreased from AUD5600 per metre to AUD2200 per metre, attributed to longer wellbores and optimised operational strategies. Key challenges addressed include logistics in remote areas, regulatory complexities, and technical difficulties, such as drilling through the Moroak Sandstone and managing shallow aquifers. This paper highlights the importance of meticulous logistical planning, strong industry relationships, and the adoption of advanced drilling technologies. Techniques, such as floating casing and other drilling technologies, have enabled longer lateral wells to be executed, which is crucial for cost reduction. Despite progress to date, ongoing challenges remain, including regulatory hurdles and the need for further technical optimisation. Future cost reductions rely on continuous learning, bulk efficiency, and long-term drilling and services contracts. By optimising well designs, improving the rate of penetration, and leveraging economies of scale, the industry can ensure the viability and profitability of the Beetaloo Sub-basin, contributing significantly to Australia’s energy future.