Cost analysis of oil, gas, and geothermal well drilling

Process Modelling of Geothermal Drilling System Using Digital Twin for Real-Time Monitoring and Control

“…Some of the key contributors to the cost include: bit and stabilization cost, directional drilling cost, tools and on-site supervision, etc. [6].…”

Assessment of the resource base for engineered geothermal systems in Great Britain

“…The results presented here have shown that at depths of 4-5 km and temperatures in excess of 180 °C, the majority of the EGS potential is restricted to these granites. Breede et al (2013) report that of 31 EGS projects worldwide, the deepest well drilled was 5093 m at Soultz-sous-Forêts in France and the average well depth was 3046 m. Drilling is the largest cost component of an EGS project (MIT 2006) and Lukawski et al (2014) report that significant improvements in geothermal drilling technology over the last 35 years has reduced the rate at which well costs increase with depth. Continued improvements will allow economic drilling to 7 km depth which will enable EGS exploitation in all regions of Great Britain.…”

Numerical analysis of downhole heat exchanger designed for geothermal energy production

“…The first term is subject to change due to the measured depth (MD) of the reservoir (Lukawski et al 2014). …”

“…In general, the deep drilling operation may constitute up to 60% of the whole project funds (Lukawski et al 2014). The geothermal wells usually have larger well diameters, higher rock temperature and pressure, and applied to aggressive geo-fluid causing corrosion and erosion of the well completion (Lukawski et al 2014;Kubik 2006).…”