AltaRock Featured in Inc. Magazine
We’re excited to share that AltaRock is featured in the May issue of Inc. Magazine with an article about the Newberry EGS Demonstration.
Inc. reporter Sam Wagreich spent quite a bit of time learning about our project and has written a strong, succinct description not only of how EGS works, but why it is poised to make such a difference:
“Geothermal energy holds great promise as a renewable source of round-the-clock electricity. But large-scale geothermal power production, which involves harnessing energy created by the heat of the earth’s interior, has proved difficult and expenseive. AltaRock Energy of Seattle has developed a process that could be a breakthrough.”
Staff Bio: Abi
Meet Abigail, a Labrador Retriever/Boxer cross. Abi was adopted from a shelter in Maine at the age of five months after being found as a stray. After fattening up at her new home on the farm, she moved to Oregon four years ago and became an AltaRock field dog in June, 2012.
What does Abi do at work?
Abi’s main field tasks include keeping Kyla company and making sure no one finishes their lunch (or bananas!) unassisted. She enjoys rolling in the dirt, napping in the sun and playing tug-of-war with her canine sidekick, Yoda, although she thinks he barks just a little too much sometimes.
Now that field season has come to a close, Abi can often be found at our office in Bend, watching for the mailman and greeting visitors with a wag of her tail and a lick on the face if she can get away with it.
EGS Participant Bio: Kyla Grasso
Kyla Grasso joined the AltaRock Energy team as a Geologist in June, 2012, and since then has been actively involved with field work at the Newberry EGS project site.
Background and Introduction to Geothermal Energy
Kyla holds a B.S. in Environmental Science from the University of Maine and a B.S. in Geology from Oregon State University. Her undergraduate thesis work involved characterizing the fault system at Newberry Volcano, and when AltaRock offered her a field position working on the Newberry EGS site, she was thrilled. “The opportunity to continue working on active research at Newberry was really exciting,” she said of accepting her current position with AltaRock.
Role in the demonstration
Kyla has been involved with most aspects of field work at the Newberry EGS Demonstration site. Her first task with AltaRock was to oversee the drilling of the MSA boreholes and help with installing the microseismic array equipment. During the stimulation, Kyla was involved with seismic monitoring and reporting, equipment maintenance and daily site activities.
Her continued involvement in groundwater monitoring at the project site means she’s spent the winter months snowshoeing and collecting water samples for analysis. Kyla says she’s enjoyed the ups and downs of seeing things coming together at Newberry, and is looking forward to another field season in 2013.
Why she joined the geothermal industry
Kyla joined the geothermal industry because to her it represents one of the best possible solutions in the balancing act between human need and consumption, and the necessity of protecting the environment. “While we can’t erase our footprint on the Earth completely, the development of economically viable EGS could reduce the negative effects of our impact significantly. By reducing the number of fossil fuel fired power plants and replacing them with lower impact facilities, EGS could play an important role in how we think about energy use, efficiency and dependence. Seeing central Oregon become a forefront in the development of EGS technology is exciting.”
Outside of the demonstration
Kyla’s interests include road biking, hiking with her dog, wilderness rescue and trail running.
Technical Papers from the Newberry Demonstration
We at AltaRock believe that our work at the Newberry EGS Demonstration is very important, not just for ourselves but for the greater geothermal community and the future of global electricity and infrastructure.
We have been committed to collaboration and sharing our data and insights since the project’s inception–our geologists and engineers have spoken regularly at industry conferences, partnered with academic institutions, and published a number of papers.
An archive of those papers is available on our website: http://altarockenergy.com/technology.htm They are probably most useful to the technically inclined, but we hope the general public finds something of interest in them as well.
Personal Account: Stanford Geothermal Workshop
AltaRock Energy’s Matt Uddenberg accompanied a group of staff to this year’s Stanford Geothermal Conference, where AltaRock’s Susan Petty and Trenton Cladouhos gave a presentation on the Newberry EGS Demonstration. This was Matt’s first experience with the workshop, so we asked him to share his experience.
Why I Went
I was fortunate enough to have my first experience attending the Stanford Geothermal Workshop this year. My background is in geology; I also have some experience in finance and engineering. From my perspective I am interested in how operators or modelers characterize, simulate and optimize a geothermal field. Coming to Stanford I was looking to see what research was taking place that would allow operators to optimize their fields.
At the conference I saw many interesting solutions to an array of problems within the industry. I also saw that the new direction of geothermal research is most prominently Engineered Geothermal Systems (EGS). There were many talks on a variety of subjects but the most popular by far was coupled thermal-mechanical models trying to accurately predict fracture formation and propagation. Overall, the unofficial theme of this year’s conference seemed to be: how do we control the stimulation process so we can make high-functioning man-made reservoirs?
First Impressions
Stanford is a beautiful place. Having spent the winter in Bend, Oregon and Seattle, Washington, the sunlight that greeted me when I arrived in Palo Alto forced me to smile. Walking into the alumni center where the conference was held, I was pleased to see that it, too, was filled with sunlight.
Inside, it was immediately clear that this conference drew participants from around the world. There were researchers from Turkey, China, France, Germany, the Philippines, and more. As the event coordinator, Roland Horne, gave the welcome speech, looks of recognition darted around the room from one participant to another. Despite the audience’s global footprint, many of these people had met before. Geothermal is still a small industry, one where operators and researchers from around the world are colleagues, even across continents.
Despite the close connections of the industry, Roland Horne gave a historical perspective on how much smaller the conference had been when it first began. On an international scale, geothermal projects have certainly grown drastically in the past 30 years, though the United States has not kept pace with nations like Germany and Australia when it comes to developing environmentally and economically promising technologies such as EGS.
Day 1: Reservoirs and Cost Reduction
Walking around the conference and poking my head into different sections I saw that most of the research was focused on the overall concept of improving the efficiency of reservoir creation – thus lowering the cost of EGS as a form of energy production.
The first talk I saw was on rock mechanics. The presenters were exploring how small scale stress fields are affected by a propagating fracture going through a material with a set of defined criteria and modeled as a discreet element model.
Such research aims to help developers design a stimulation procedure with a predictable output, eg. a fracture with a certain aperture and orientation. Doing this would enable one to design a fracture system that best meet the needs of a given resource.
By the end of the day I had attended 12 talks on 12 different ways to model fracture propagation. Many overlapped or were closely related, asking similar questions and trying related methods to answer those questions. This is proof of why these conferences are so valuable: they’re an opportunity for researchers to both share and to receive, to be informed by the learning of others, and to grow from the community’s collective work.
Day 2: EGS Field Results
The next day I went to talks primarily focused on field results in conventional and EGS fields. The common presentation style of these talks was a slide or slides depicting a three dimensional space filled with different sized and colored dots.
These slides depicted visualizations of seismic data. During the stimulation process small micro-earthquakes (MEQs) are generated when natural fractures undergo shear failure, when fractures spontaneously close, or for a variety of other kinetic reasons. Using a micro-seismic array developers are able to monitor these events and determine at where they occur and how large an event they are.
In this area, I’d like to see more research connecting what developers are able to observe and what modelers were able to model. In a heterogeneous reservoir how could one ascertain rock properties away from the wellbore if all one can observe are micro-seismic events? What was the value of these intricate complex models if the inputs could not be known?
Day 3: Cost Modeling and Geochemistry
The third day I went to talks focused on cost modeling and geochemistry. These talks were the highlight for me.
Especially high on the list was Cornell University’s presentation on its new cost modeling software ‘Geophires’. They use simple but adequate models to model the evolution of a field dominated by porous media, fractures or both. They use these models to come up with an optimal plant size and technology and then use all of this information to determine a levelized cost of energy. Cornell’s solution to cost modeling is clear, accurate and elegant.
I also really enjoyed a series of talks that day about characterizing a geothermal hot spring by geological means and modeling known parameters to inform a better understanding of the system.
Final Thoughts and What Comes Next
Seeing these talks felt refreshing, and I especially appreciated how these groups used different forms of analysis and modeling data to create a defined characterization of a system. These characterizations were improved by using the output of one form of analysis to inform the structure of a model characterizing the system. This model would in turn show possible discrepancies in the data or analysis and then the analysis could be tweaked to better represent the system. Iterating this process would give one a clear understanding of a system as a whole.
What I would like to see next, building on what I experienced at the Stanford Geothermal Workshop:
- Tools that iterate between models, data and analysis to characterize a system. Currently, micro-seismic data is not being used by models to characterize the systems that are being developed.
- A way to validate the models currently being produced.
- Development of models that will inform the characterization of reservoirs.
As I left the Stanford alumni center on the last day, it was still sunny and there was a slight breeze. It had been a treat to see the work underway by researchers around the world. It was also both humbling and energizing to realize how much work still needs to be done, and I’m excited to be a part of it.
EGS Participant Bio: Matt Uddenberg
Read Matt’s account of the 2013 Stanford Geothermal Workshop here.
Matt Uddenberg joined AltaRock as an intern in 2012. His job primarily entails computer programming for live visualization software development and other applications, although he’s also been known to work on seismic monitoring equipment installation and various other tasks to keep things moving forward at the project site.
Background and Introduction to Geothermal Energy
Matt was introduced to the industry while working with a geothermal well drilling operation at the Coso Geothermal Field near Owens Lake, California. “The first time I saw a well being flow tested I was amazed and captivated. It seemed incredible that one could tap into such an incredible and sustained power.” After completing his graduate work at the University of Texas, Matt was recruited to the AltaRock team for his skills and experience in the industry.
Enjoying the Newberry Demonstration Project
“I really enjoyed developing my programming skills and creating the Human Machine Interface and data visualization software. I also thoroughly enjoyed ratcheting more bolts than I can remember into their respective places.”
What’s on his resume?
Matt holds a B.S. in Earth Science from the University of California at Santa Cruz and an M.A. in Earth and Energy Resources from the University of Texas, Austin. He’s also worked as a mud logger for geothermal well drilling, served as an Environmental Geophysics Technician and been a Research Assistant for the Bureau of Economic Geology in Austin, Texas.
In his free time
Matt enjoys writing, traveling, hiking, playing the occasional soccer game and seeing live music when he can.
Two months after the stimulation and the well being shut in for the winter, we are pleased to have had the opportunity to present our results to the geothermal community at the 38th Stanford Geothermal Workshop. During the Wednesday morning session of talks on EGS, Susan Petty and Trenton Cladouhos of AltaRock presented our stimulation results to a crowd eager to hear of our progress.
Presentation by Susan Petty
Susan’s presentation focused on our efforts to gather information and data to develop our comprehensive operation plan before engaging in the permitting process and various public outreach campaigns (including this blog!).
She also addressed the timescale of field work at the project site, confirming that the highly anticipated Newberry EGS Demonstration has finally become reality. Susan also addressed the effectiveness of the diverers usedduring stimulation, showing marked improvements in well permeability and evidence of stimulation/diversion locations from continuous temperature monitoring within the well.
Overall, the stimulation results presented by Susan were well received at Stanford, and the geothermal community posed many questions about our diversion practices and the implications it has on performing future EGS stimulations in a cost-effective way.
Presentation by Trenton Cladouhos
Trenton presented further evidence of our success at Newberry, discussing the details of our seismic monitoring during the stimulation. Trenton laid out how monitoring can enhance geosciences and engineering techniques, and he described other procedures essential to the expansion of EGS.
Trenton showed that our improvements to the local seismic network made it possible to detect micro-events. This allowed us to monitor the progress of the stimulation, detecting micro-events previously invisible to existing seismic detection equipment. The locations of over 100 events detected by the network showed that over the course of the stimulation, the diverter caused a shift in the location of the local micro-seismicity. This was further indication of our diversion’s effectiveness.
Finally, Trenton shared some of the lessons we learned regarding EGS seismic monitoring, including how crucial the borehole monitoring stations we installed were to the stimulation. The crowd at Stanford was pleased and amused to learn that even our largest events were barely noticeable on surface stations, which seemed to be more effective at detecting cars and trains than seismicity from EGS.
