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Chesapeake Energy backs Houston geothermal tech co. in $17M series A

fresh funding

Houston-based Sage Geosystems announced the first close of $17 million round led by Chesapeake Energy Corp. Photo via sagegeosystems.com

A Houston geothermal startup has announced the close of its series A round of funding.

Houston-based Sage Geosystems announced the first close of $17 million round led by Chesapeake Energy Corp. The proceeds aim to fund its first commercial geopressured geothermal system facility, which will be built in Texas in Q4 of 2024. According to the company, the facility will be the first of its kind.

The venture is joined by technology investor Arch Meredith, Helium-3 Ventures and will include support from existing investors Virya, LLC, Nabors Industries Ltd., and Ignis Energy Inc.

“The first close of our Series A funding and our commercial facility are significant milestones in our mission to make geopressured geothermal system technologies a reality,” Cindy Taff, CEO of Sage Geosystems, says in a news release. “The success of our GGS technologies is not only critical to Sage Geosystems becoming post-revenue, but it is an essential step in accelerating the development of this proprietary geothermal baseload approach. This progress would not be possible without the ongoing support from our existing investors, and we look forward to continuing this work with our new investors.”

The 3-megawatt commercial facility will be called EarthStore and will use Sage’s technology that harvests energy from pressurized water from underground. The facility will be able to store energy — for short and long periods of time — and can be paired with intermittent renewable energy sources like wind and solar. It will also be able to provide baseload, dispatchable power, and inertia to the electric grid.

In 2023, Sage Geosystems debuted the EarthStore system in a full-scale commercial pilot project in Texas. The pilot produced 200 kilowatt for more than 18 hours, 1 megawatt for 30 minutes, and generated electricity with Pelton turbines. The system had a water loss of less than 2 percent and a round-trip efficiency (RTE) of 70-75.

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This article originally ran on InnovationMap.

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Here are three things to know in Houston energy transition news. Photo via Getty Images

Deloitte's new energy lead, a $7.4B deal, and more things to know this week

take note

Editor's note: It's a new week — start it strong with three quick things to catch up on in Houston's energy transition: a roundup of events not to miss, a Houston energy executive to know, and more.

Incoming: Deloitte names new head of energy, chemicals practice

Teresa Thomas was named vice chair and national sector leader for energy and chemicals at Deloitte. She takes over the role from Amy Chronis, partner at Deloitte LLP, who will continue to serve within the energy and chemicals practice until her retirement in June 2024.

"I am fortunate to have worked in the energy and chemicals industry for most of my career, and I'm honored to continue working with companies that are playing a pivotal role in powering progress and purpose," Thomas says in a news release. "Our industry is at the epicenter of the energy transition that can fuel tremendous potential for society, and I'm excited to be leading during this important and transformational time."

Last year, Chronis announced her retirement from Deloitte, and the company named Melinda Yee as the incoming Houston managing partner at Deloitte, a role Chronis held in addition to the title of vice chair and US energy and chemicals leader. Chronis is slated to retire in June 2024, and Yee's new role became effective this month. Read more.

Events not to miss

Put these Houston-area energy-related events on your calendar.

  • Energy Underground's January meeting is on January 18 at noon at the Esperson Building. Register.
  • The Houston Oil and Gas Executive Leadership Summit is an meeting of executives, policymakers, academics, and other professionals with a particular interest related to energy. The event is January 25 at the DoubleTree by Hilton Hotel Houston. Register.
  • Future of Energy Summit is Tuesday, February 6, at AC Hotel by Marriott Houston Downtown. Register.
  • The De Lange Conference, taking place February 9 and 10 at Rice University's Baker Institute for Public Policy, is centered around the theme “Brave New Worlds: Who Decides? Research, Risk and Responsibility” this year. Register.

Really big deal: Southwestern Energy to combine with Chesapeake in $7.4B deal

Chesapeake Energy and Southwestern Energy are combining in a $7.4 billion all-stock deal to form one of the biggest natural gas producers in the U.S.

The transaction, valued at $6.69 per share, will create a company that has large scale acreage in the Appalachia region and Haynesville, Louisiana. It has current net production of approximately 7.9 Bcfe/d with more than 5,000 gross locations and 15 years of inventory.

“The world is short energy and demand for our products is growing, both in the U.S. and overseas," Chesapeake CEO Nick Dell’Osso said in a prepared statement Thursday. "We will be positioned to deliver more natural gas at a lower cost, accelerating America’s energy reach and fueling a more affordable, reliable, and lower carbon future." Read more.

Houston-based Southwestern Energy will combine with Oklahoma City-based Chesapeake Energy. Photo via swn.com

Houston energy company to combine with Chesapeake in $7.4B deal

M&A moves

Chesapeake Energy and Southwestern Energy are combining in a $7.4 billion all-stock deal to form one of the biggest natural gas producers in the U.S.

There have been a string of deals in the energy sector, including the nearly $60 billion acquisition of Pioneer Natural Resources by ExxonMobil and a $53 billion deal between Chevron and Hess.

Southwestern shareholders will receive 0.0867 shares of Chesapeake common stock for each outstanding share of Southwestern common stock at closing.

Chesapeake shareholders will own about 60 percent of the combined company, while Southwestern shareholders will own approximately 40 percent.

The transaction, valued at $6.69 per share, will create a company that has large scale acreage in the Appalachia region and Haynesville, Louisiana. It has current net production of approximately 7.9 Bcfe/d with more than 5,000 gross locations and 15 years of inventory.

“The world is short energy and demand for our products is growing, both in the U.S. and overseas," Chesapeake CEO Nick Dell’Osso said in a prepared statement Thursday. "We will be positioned to deliver more natural gas at a lower cost, accelerating America’s energy reach and fueling a more affordable, reliable, and lower carbon future."

The combined company will build a facility in Houston to supply lower-cost, lower carbon energy to meet increasing domestic and international liquefied natural gas demand.

The combined company will have a new name, but that has not yet been disclosed.

The boards of both companies have approved the deal, which is expected to close in the second quarter. It still needs approval from Chesapeake and Southwestern shareholders.

Shares of Southwestern, based in Houston, declined more than 3 percent before the market opened, while shares of Chesapeake, based in Oklahoma City, Oklahoma, rose slightly.

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Chevron CEO touts biofuels as part of its renewable energy efforts

Betting on biofuels

As Chevron Chairman and CEO Mike Wirth surveys the renewable energy landscape, he sees the most potential in biofuels.

At a recent WSJ CEO Council event, Wirth put a particular emphasis on biofuels—the most established form of renewable energy—among the mix of low-carbon energy sources. According to Biofuels International, Chevron operates nine biorefineries around the world.

Biofuels are made from fats and oils, such as canola oil, soybean oil and used cooking oil.

At Chevron’s renewable diesel plant in Geismar, Louisiana, a recent expansion boosted annual production by 278 percent — from 90 million gallons to 340 million gallons. To drive innovation in the low-carbon-fuels sector, Chevron opened a technology center this summer at its renewable energy campus in Ames, Iowa.

Across the board, Chevron has earmarked $8 billion to advance its low-carbon business by 2028.

In addition to biofuels, Chevron’s low-carbon strategy includes hydrogen, although Wirth said hydrogen “is proving to be very difficult” because “you’re fighting the laws of thermodynamics.”

Nonetheless, Chevron is heavily invested in the hydrogen market:

As for geothermal energy, Wirth said it shows “some real promise.” Chevron’s plans for this segment of the renewable energy industry include a 20-megawatt geothermal pilot project in Northern California, according to the California Community Choice Association. The project is part of an initiative that aims to eventually produce 600 megawatts of geothermal energy.

What about solar and wind power?

“We start with things where we have some reason to believe we can create shareholder value, where we’ve got skills and competency, so we didn’t go into wind or solar because we’re not a turbine manufacturer installing wind and solar,” he said in remarks reported by The Wall Street Journal.

In a September interview with The New York Times, Wirth touched on Chevron’s green energy capabilities.

“We are investing in new technologies, like hydrogen, carbon capture and storage, lithium and renewable fuels,” Wirth said. “They are growing fast but off a very small base. We need to do things that meet demand as it exists and then evolve as demand evolves.”

Houston robotics company partners with Marathon Petroleum to scale fleet

robot alliance

Houston- and Boston-based Square Robot Inc. has announced a partnership with downstream and midstream energy giant Marathon Petroleum Corp. (NYSE: MPC).

The partnership comes with an undisclosed amount of funding from Marathon, which Square Robot says will help "shape the design and development" of its submersible robotics platform and scale its fleet for nationwide tank inspections.

“Marathon’s partnership marks a major milestone in our mission to transform industrial tank inspection,” David Lamont, CEO of Square Robot, said in a news release. “They recognize the proven value of our robotic inspections—eliminating confined space entry, reducing the environmental impact, and delivering major cost efficiencies all while keeping tanks on-line and working. We’re excited to work together with such a great company to expand inspection capabilities and accelerate innovation across the industry.”

The company closed a $13 million series B last year. At the time of closing, Square Robot said it would put the funding toward international expansion in Europe and the Middle East.

Square Robot develops autonomous, submersible robots that are used for storage tank inspections and eliminate the need for humans to enter dangerous and toxic environments. Its newest tank inspection robot, known as the SR-3HT, became commercially available and certified to operate at a broader temperature range than previous models in the company's portfolio this fall.

The company was first founded in the Boston area in 2016 and launched its Houston office in 2019.

$3B acquisition of hazardous waste co. tops latest energy news to know

Trending news

Editor's note: The top energy transition news for the month includes Veolia's $3 billion Clean Earth acquisition and ERCOT's new $9.4 billion project. Here are the five most-read EnergyCapitalHTX stories from December 1-16, 2025:

1. Hazardous waste company with Houston presence to make $3B acquisition

Veolia will acquire Clean Earth. Photo courtesy of Veolia/LinkedIn

Veolia, a Boston-based company with major operations in Texas, is purchasing hazardous-waste company Clean Earth from Enviri as part of a $3 billion deal. Veolia is a private water operator, technology provider and hazardous waste and pollution treatment company that operates a large hazardous waste treatment and incineration facility in Port Arthur. Hazardous waste treatment is a growing sector as the clean energy, semiconductor manufacturing, healthcare and pharmaceutical industries generate high levels of waste that need to be handled safely. Continue reading.

2. Federal judge strikes Trump order blocking wind energy development

A federal judge has thrown out President Trump's executive order blocking wind energy development, calling it 'arbitrary and capricious.' Photo by Moritz Lange via Unsplash.

In a win for clean energy and wind projects in Texas and throughout the U.S., a federal judge struck down President Donald Trump’s “Day One” executive order that blocked wind energy development on federal lands and waters, the Associated Press reports. Judge Patti Saris of the U.S. District Court for the District of Massachusetts vacated Trump’s executive order from Jan. 20, declaring it unlawful and calling it “arbitrary and capricious.” Continue reading.

3. Air Liquide and Hyundai ink partnership to scale hydrogen economy

Air Liquide and Hyundai agreed to expand hydrogen refuelling networks, storage capacity and more at a meeting in Seoul last week. Photo courtesy Air Liquide.

Air Liquide, which maintains its U.S. headquarters in Houston, and South Korea-based Hyundai Motor Group are expanding their strategic partnership to accelerate the growth of the global hydrogen ecosystem. The renewal of the companies’ Memorandum of Understanding (MoU) was announced at the Hydrogen Council CEO Summit in Seoul last week. Together, the companies will work to scale hydrogen production, storage, transportation and utilization across Europe, Korea and the United States with a concentration on heavy-duty transport, logistics and public transportation. Continue reading.

4. ERCOT approves $9.4B project to improve grid, meet data center demand

ERCOT plans to build a “super highway” of new transmission lines to boost grid reliability. Photo via Getty Images

The Electric Reliability Council of Texas, which manages the electric grid for 90 percent of Texans, is undertaking a $9.4 billion project to improve the reliability and efficiency of statewide power distribution. The initiative comes as ERCOT copes with escalating demand for electricity from data centers and cryptocurrency-mining facilities. Continue reading.

5. Reliant partners to expand Texas virtual power plant and home battery use

Reliant is offering new incentives to boost NRG's virtual power plant network in Texas. Photo via goodleap.com.

Houston’s Reliant and San Francisco tech company GoodLeap are teaming up to bolster residential battery participation and accelerate the growth of NRG’s virtual power plant (VPP) network in Texas. Through the new partnership, eligible Reliant customers can either lease a battery or enter into a power purchase agreement that incentivizes users by offering monthly performance-based rewards for contributing stored power to the grid. Continue reading.

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