Rapid growth in drilling increased cost per well from 2006 to 2012. Since 2012, however, costs per well have decreased because of reduced overall drilling and improved drilling efficiency and tools.
Changes in costs and well parameters, such as the need to drill deeper or longer lateral wells, have affected the onshore oil plays differently in 2015, with recent per-well costs ranging from 7% to 22% below 2014 levels, according to the study.
Costs for each onshore oil play area differ due to variations in geology, well depth, and water disposal options. Overall, the adoption of best practices and the improvement of well designs have reduced drilling and completion times, decreased total well costs, and increased well performance.
“Greater standardization of these drilling and completion practices and designs across the industry should continue to lower costs. The drilling cost per foot, based on total depth, and the completion cost per foot, based on lateral length, are both projected to maintain these lower cost trends through 2018. Sustained lower upstream costs may affect near-term oil and natural gas markets, and ultimately, the prices of these fuels,” EIA said.