Methane Detection for Abandoned Oil and Gas Wells

Abandoned oil and gas wells pose significant risks to human health and the environment by emitting air pollutants, contaminating groundwater, and leaving behind hazardous debris. In the United States, approximately 3.9 million documented wells vary widely in the accuracy of their recorded locations and plugging status, creating major challenges for detection, mapping, and remediation. Existing methods show some promise but often lose effectiveness under complex conditions, such as vegetation occlusion or construction without metal components. In this study, we propose a drone-based approach equipped with a highly sensitive methane sensor to detect elevated methane concentrations. To address the noisy and variable nature of environmental sensor data, statistical methods were developed that enable reliable detection of low-level emissions under field conditions. Controlled release experiments with known emission points validated the method’s ability to localize candidate sources. We further tested the approach at a field site containing three abandoned wells with known locations and sparse emission profiles. The results demonstrate that the proposed drone-based sensing method provides a scalable, cost-effective solution for the high-confidence identification of actively leaking wells and offers a direct indicator of environmental risk, supporting targeted monitoring and the prioritization of remediation efforts.