Giving Oil Wells a Second Life: An Interview with Phil Cruver, CEO of Geo2Watts (Part 3)
Regulatory pathways via CalGEM partial-abandonment permits and the rollout strategy for distributed long-duration energy storage.
www.geo2watts.com
The world is facing a dual challenge: retiring thousands of idle oil and gas wells while simultaneously building a resilient, zero-carbon power grid. Geo2Watts, a California-based clean technology innovator, offers a solution to both problems at once.
Oil & Gas Technology (OGT) spoke with Phil Cruver, Co-founder and CEO of Geo2Watts about the thermodynamics of Borehole Battery™ Platform (BBP), the economics of brownfield redevelopment, and how idle wells could soon power grid infrastructure.
Read Part 1 of The Interview
Read Part 2 of The Interview
Partnerships, regulation, and commercialization
OGT: What regulatory and policy challenges need to be addressed before large-scale deployment of repurposed oil and gas wells for energy storage becomes possible? Are existing regulations designed to support this type of energy transition solution?
Phil: An important point, because California doesn't necessarily needsto create an entirely new regulatory system before the BBP can be deployed. Geo2Watts Co-founder and Director of Regulatory Affairs, Bill Bartling, a former Chief Deputy at CalGEM, has examined this issue from the perspective of someone who spent years administering California's oil-and-gas regulatory system. The conversion of an idle well into a BBP can be handled within CalGEM's existing authority through a workover or partial-abandonment permit which has been confirmed by Counsel at California's Department of Conservation.
That makes sense because the first step in a BBP conversion is fundamentally an oil-well abandonment operation. The hydrocarbon-producing intervals are permanently isolated and abandoned in accordance with existing requirements. What is different is that instead of plugging the entire wellbore all the way to the surface and destroying its remaining useful infrastructure, the mechanically sound portion of the well is retained and repurposed as a closed-loop thermal-energy-storage asset. CalGEM already regulates well reworking, casing modifications, plugging, and abandonment. So, from the well-integrity standpoint, there is an existing regulatory pathway today.
That is an important distinction. We are not asking California to suspend its abandonment regulations, we are proposing to use those regulations to accomplish the hydrocarbon abandonment while preserving a qualified portion of the well for clean-energy reuse. There will, of course, be additional considerations as projects scale. Local land-use approvals, environmental review, electrical permitting, and ultimately a more specific regulatory classification for repurposed energy-storage wells may be desirable. Over time, we believe California will establish clear statewide standards specifically for this new category of infrastructure.
Future applications and market potential
OGT: The California Public Utilities Commission has established ambitious clean energy procurement targets, including the addition of 6 GW of clean energy capacity. How does Geo2Watts plan to contribute to these objectives? What advantages can distributed energy storage systems provide compared with large, centralized energy projects?
Phil: California's challenge is no longer simply adding more renewable generation. The state has built enormous amounts of solar and other clean generation; the next challenge is making that electricity available when and where it is needed. That is where Geo2Watts believes the BBP can make an important contribution.
California's planning process is increasingly focused on clean, reliable and flexible resources, including LDES. The BBP is being designed specifically for that role: charge when electricity is inexpensive or abundant, store that energy underground for extended periods, and return it as dispatchable, zero-emission electricity during periods of high demand. Our strategy is not to build one enormous, centralized storage plant. We envision converting clusters of suitable idle and underperforming wells into a distributed, dispatchable network of LDES assets located throughout existing energy-producing regions. That distributed model provides several advantages.
First is speed of deployment
Large, centralized energy projects can require new land, major transmission upgrades, new substations, lengthy interconnection studies, and years of permitting. Many oilfield locations already have wells, roads, substations, electrical connections, rights-of-way, industrial zoning, and operating infrastructure. Repurposing those assets can potentially eliminate several of the most difficult steps in developing a new energy project.
Second is location value
A megawatt of storage located next to an industrial load or at an existing constrained grid node may be more valuable than a megawatt located hundreds of miles away. Distributed BBP installations can potentially place storage close to where electricity is consumed, reducing dependence on additional transmission infrastructure and helping relieve local constraints.
Third is modularity
Rather than waiting for a single 500 or 1,000-MW project to be completed, well clusters can potentially be developed incrementally. A successful multi-megawatt installation can become the first block of a much larger network, with additional clusters added as wells become available and electricity demand grows. That is particularly compelling in places such as the Wilmington Basin and Long Beach. The region combines large industrial electrical loads, dense clusters of existing wells, substations and grid infrastructure. Our long-term planning envisions starting with a demonstration at THUMS Islands and potentially expanding across approximately 400 priority idle and marginal wells in the Long Beach and Wilmington area.
The fourth advantage is resilience
A highly centralized grid depends on a relatively small number of large generating stations, storage facilities and transmission corridors. Distributed storage creates multiple energy nodes. That can provide redundancy for industrial facilities, ports, military installations, data centers and other critical loads while also supporting the broader grid.
Finally, distributed storage can preserve something that California has already spent enormous amounts of money building: its existing energy infrastructure. Rather than permanently abandoning wells, substations and electrical connections and then constructing an entirely new energy system elsewhere, we can selectively reuse those assets for the next generation of energy. Therefore, our objective is not simply to contribute megawatts toward a procurement target. It is to contribute high-GridValue™ megawatts of clean electricity that is long-duration, dispatchable, distributed, located near existing loads and capable of using infrastructure that is already in place. We think that is an important evolution in how California should think about energy development. The question is not only, “How many gigawatts can we build?” It is also, “How quickly can we put those gigawatts where the grid needs them, and how much existing infrastructure can we reuse to do it?” That is the role we believe the BBP can play.
Expansion beyond California
OGT: California represents an important starting point for Geo2Watts, but many regions around the world face similar challenges: abandoned wells, renewable energy integration, and grid reliability. Which markets or regions do you consider most promising for future expansion?
Phil: California is an ideal starting point because it combines all the conditions that make the BBP compelling: a very large inventory of mature oil and gas wells, high electricity prices, significant renewable generation, constrained grid infrastructure, and strong pressure to manage end-of-life petroleum assets. But those conditions are not unique to California.
In the United States, Texas and New Mexico's Permian Basin is the most obvious next major market. It has an enormous oil and gas well inventory, rapidly growing wind and solar generation, substantial intraday electricity-price volatility, and extraordinary new load growth from industrial facilities and data centers. ERCOT is already integrating large amounts of energy storage, which demonstrates the growing value of flexible resources on that grid.
Other U.S. oil-producing regions including Oklahoma, Louisiana, Wyoming, Colorado, Pennsylvania, and parts of the Appalachian Basin, are also attractive as wells reach the end of their productive lives. Our model is particularly interesting where those wells are clustered near existing substations, industrial loads, pipelines, refineries, data centers, or other energy-intensive facilities.
California is our starting point, but we see the broader U.S. market as the real near-term opportunity. The One Big Beautiful Bill, or OB3, creates a very favorable investment environment for qualifying zero-emission energy infrastructure, and we believe that tax benefits can materially accelerate deployment of the BBP across the United States. There are oil and gas operations in 31 states, and collectively those states contain a very large inventory of idle, marginal, and end-of-life wells. That gives Geo2Watts, and ultimately our licensees, a domestic development pipeline large enough to keep us focused on the U.S. market for the next decade. Our strategy is to prove the model in California, then replicate it across other mature producing regions where the same fundamentals exist large inventories of suitable wells, existing electrical infrastructure, low-cost electricity for charging, and strong demand for distributed, dispatchable power.
As more BBPs are built, we expect the cost structure to improve through standardization, modular engineering, manufacturing scale, supply-chain development, and licensing. The aboveground power-conversion equipment can increasingly be mass-produced rather than engineered project by project, while well-conversion procedures can become standardized across large portfolios. That is where economies of scale become very powerful.
Our objective is to use the U.S. market, and the incentives available under OB3 to drive the BBP down the cost curve. Once we achieve sufficient manufacturing volume and operating experience, we believe the technology can become competitive internationally without relying on equivalent tax subsidies. Therefore, our expansion strategy is intentionally sequential: use the U.S. market to prove, scale, standardize, and manufacture the technology, then take that lower-cost platform to the rest of the world. With 31 oil and gas states and a substantial inventory of idle wells, we believe the domestic opportunity alone can keep Geo2Watts and its future licensees very busy for the next decade.
The transformation of aging fossil fuel infrastructure into long-duration clean energy assets represents a vital paradigm shift in grid decarbonization. Through the Borehole Battery™ Platform, Geo2Watts demonstrates that the infrastructure of our industrial past can directly enable the resilient, zero-carbon grid of our future.
Edited by Evgeny Churilov, Induportals Media - Adapted by AI.
www.geo2watts.com
