Reliable Data Acquisition in >200°C Geothermal Well Environments

Wireline logging in a geothermal well had to be performed in sections with deviations over 57° and bottomhole temperatures exceeding 200°C. Traditional conveyance methods such as pipe conveyed or tractors were deemed unsuitable due to both risk and cost, prompting the operator to engage Petromac for a safer deployment solution. Using Petromac’s proprietary Hermes tension model, the team conducted a detailed analysis of the well trajectory and geometry to assess conveyance risks and optimize deployment planning. All runs in the 12.25” section were completed with zero incidents — no stick-slip, no image rotation, and no overpull. During the 8.5” section, following a mechanical sticking event, the operator opted to bypass Petromac for a run — against Hermes model recommendations. As predicted, the unassisted run failed to reach total depth. The operator reinstated Petromac for all subsequent runs that were completed smoothly through rugose hole conditions. Petromac’s model-driven conveyance restored full operational confidence and ensured uninterrupted data acquisition. This operation is a strong demonstration of how predictive modeling, fit-for-purpose conveyance tools, and field-proven reliability can safeguard data quality and reduce risk in the harshest well environments. Extreme environments demand predictive assurance and field-proven reliability.