『Tim Lines - CEO of Geothermal Wells, Geothermal Evangelist』のカバーアート

Tim Lines - CEO of Geothermal Wells, Geothermal Evangelist

Tim Lines - CEO of Geothermal Wells, Geothermal Evangelist

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 In this episode, we sit down with Tim Lines, a petroleum engineer turned geothermal advocate, whose career spans 40+ countries in oil & gas, district heating, and now geothermal innovation. We explore how he was drawn into the sector, the technical-economic feasibility of geothermal at scale, and his company’s work to advance projects in the UK and abroad.⏱️ Timestamps* 00:00 - Introduction, What led Tim to geothermal and why now? Exploration of future of geothermal energy* 7:08 - Breaking down more of the future of geothermal in Texas report* 12:30 - How are current technologies trying to solve the heat issues for drilling with geothermal? What can other geothermal developers learn?* 17:32 - Digging into different drilling fluids and which make more sense to use* 21:20 - How can we get better at processing and reducing errors in sensing data in the context of geothermal drilling?* 23:57 - European SPE Geothermal Energy Hackathon* 28:48 - How have your assumptions about geothermal energy changed as you’ve been involved in the field? Tim also discusses one of the projects he’s been working on in the UK and discusses the different partners and techniques he’s used to find success* 41:09 - Discussing how drilling and fracking has changed from the 90s to today* 46:05 - How can we keep pricing for geothermal competitive? What political and economic tools are available?* 52:40 - Examples of countries doing great jobs with feed in tariffs for geothermal* 59:28 - How can we work with local partners to create unique solutions to water problems for geothermal? (in this case, Tim worked with local municipalities to build a reservoir)* 1:07:03 - What are the challenges of bringing American drilling technologies abroad?* 1:10:52 - Who are the different segments of customers for geothermal projects? What are their differing needs?* 1:23:57 - What are the different challenges with customer discovery for geothermal? What tools are out there?* 1:28:56 - What are the challenges to getting different offtakers involved? How can we get them excited about geothermal?* 1:30:48 - How do American and international offtakers differ in needs?* 1:32:56 - How does your team source equipment and talent for geothermal development?* 1:39:17- What is the most important problem that, if we could solve it today, would totally change things?🎙 Why Geothermal, and Why Now?Tim explains how his journey into geothermal began with the Society of Petroleum Engineers (SPE) and later deepened through Jamie Beard’s invitation to contribute to the Texas Geothermal Report. His rigorous bottom-up modeling compared geothermal’s potential against IEA forecasts—and revealed the resource could, technically, meet a large amount of global energy demand by 2050.You can read the newest IEA report on Geothermal Energy here.🔢 How Do You Calculate Geothermal’s Potential?Tim walks through his methods—reservoir assumptions, gradients, power conversion models, and capital cost estimates. Initially, he assumed ~3–4 MW per well pair. But projects like Fervo’s at Utah FORGE have since shown yields closer to 10 MW, with the potential for much higher.⚡️ Updating the Assumptions: From 3 MW to 25 MW+What would Tim change today? Higher well yields, multiple laterals around a single injector, and innovations in pumping to boost flow rates. He sees pathways toward 25+ MW per “well unit,” crucial for serving hyperscaler data centers and other industrial loads.NREL has also published tools (read more here and here) that helped him through this process.🛠 The Engineering Challenges of High-Temperature WellsWe dig into hurdles like:* MWD tools frying at 175–200°C and solutions like mud cooling.* High-temperature cement integrity in projects like Iceland’s magma drilling. * Fracture conductivity loss over time, requiring stronger proppants.💻 Hackathons and Engaging Young EngineersThrough SPE, Tim helped launch geothermal hackathons in Europe (newest one can be found here), blending data science and reservoir engineering. These programs brought students and young professionals worldwide into real geothermal problem-solving—creating a pipeline of new ideas and talent.🏗 Lessons from Looking GloballyTim reflects on how the broader global market looks for Geothermal Energy:* Early assumptions about rapid rollouts were optimistic.* The US remains tough, given cheap natural gas.* Focus has shifted to regions with feed-in tariffs/energy incentives (e.g., U.K.’s CfD, Germany’s Renewables Energy Act, Taiwan’s FITs, Japan’s Feed in Tariffs), effectively promising higher prices energy producers an above-market price and long term certainty and demand to help derisk renewable energy investments.* Heat networks are a powerful way to deliver low-cost social benefits—and attract municipal partners. Check out our episode with Eric Bosworth for more.💧 Water, Reservoirs, and Creative SolutionsSupplying enough water for fracking is...
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