Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Livermore develops the world's deepest ERT imaging system for CO2 sequestration

13.06.2013
Lawrence Livermore National Laboratory researchers have broken the record for tracking the movement and concentration of carbon dioxide in a geologic formation using the world's deepest Electrical Resistance Tomography (ERT) system.

The research provides insight into the effects of geological sequestration to mitigate the impact of greenhouse gases.


AN ERT electrode band, mounted on non-conductive casing, is prepared for installation. Electrodes are protected by non-conductive, epoxy-based centralizers.

The team led by LLNL's Charles Carrigan obtained time lapse electrical resistivity images during the injection of more than 1 million tons of carbon dioxide (CO2) more than 10,000 feet deep in an oil and gas field in Cranfield, Miss., which represents the deepest application of the imaging technique to date. The previous depth record of about 2,100 feet was held by the CO2SINK Project Consortium in Ketzin, Germany.

"The images provide information about both the movement of the injected CO2 within a complex geologic formation and the change with time of the distribution of CO2 in the porous sandstone reservoir," Carrigan said.

Deep geologic sequestration of CO2 is being evaluated internationally to mitigate the impact of greenhouse gases produced during oil- and coal-based energy generation and manufacturing. Natural gas producing fields are particularly appealing sites for sequestration activities because the same geologic barrier or cap rock permitting the subsurface regime to act as a long term natural gas reservoir also can serve to permanently contain the injected CO2.

ERT allowed Xianjin Yang, another member of the LLNL team, to make a movie of the expanding CO2 plume as it fills the sandstone region between the two electrode wells. To do this required analyzing months of data and using only the highest quality results to produce the images.

The team reports on the design, placement and imaging from the world's deepest ERT system in the June 1 online issue of the International Journal of Greenhouse Gas Control. The research also will appear in an upcoming print copy of the journal.

ERT can potentially track the movement and concentration of the injected CO2 as well as the degree of geologic containment using time-lapse electrical resistivity changes resulting from injecting the fluid into the reservoir formation.

Installing each ERT array in the sequestration reservoir required designing all cabling and electrodes, which were externally mounted on the borehole casing, to survive the trip more than 10,000 feet down a crooked borehole with walls made jagged by broken rocks.

The team then used the ERT array in a challenging environment of high temperature (260 degrees Fahrenheit), high pressure (5,000 psi) and high corrosive fluids to effectively detect CO2 breakthroughs and CO2 saturation changes with time.

"This is a near-real time remote monitoring tool for tracking CO2 migration with time lapse tomographic images of CO2 concentration," Carrigan said.

When converted to CO2 concentration, the images provided information about the movement of the injected CO2 within a complex geologic formation as well as how the storage of the CO2 changed with time.

Carrigan said that given concerns about injection-induced fracturing of the cap rock seal causing leakage of CO2 from the reservoir, higher-resolution ERT also may have an application as an "early-warning" system for the formation of fracture pathways in cap rock that could result in environmental damage to overlying or nearby water resources. Another potential application involves monitoring the boundary of a sequestration lease to ensure that CO2 does not migrate across the boundary to an adjacent parcel.

The ERT project is part the U.S. Department of Energy sponsored Southeast Regional Carbon Sequestration Partnership (SECARB) Cranfield project near Natchez, Miss., which has become the fifth ERT system worldwide and the first in the United States to inject more than a million tons of CO2 into the sub-surface.

The Cranfield study, which was led by Susan Hovorka of the Bureau of Economic Geology at the University of Texas, was funded by Department of Energy, National Energy Technology Laboratory under contract to the Southern States Energy Board.

More Information

"Electrical resistance tomographic monitoring of CO2 movement in deep geologic reservoirs," International Journal of Greenhouse Gas Control

"Going underground to monitor carbon dioxide," LLNL news release, June 2, 2010.

"Locked in rock: Sequestering carbon dioxide underground," Science & Technology Review, May 2005

Founded in 1952, Lawrence Livermore National Laboratory provides solutions to our nation's most important national security challenges through innovative science, engineering and technology. Lawrence Livermore National Laboratory is managed by Lawrence Livermore National Security, LLC for the U.S. Department of Energy's National Nuclear Security Administration.

Anne Stark | EurekAlert!
Further information:
http://www.llnl.gov

More articles from Earth Sciences:

nachricht PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target
22.05.2018 | Mercator Research Institute on Global Commons and Climate Change (MCC) gGmbH

nachricht Monitoring lava lake levels in Congo volcano
16.05.2018 | Seismological Society of America

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Spinning rugby balls: The rotation of the most massive galaxies

23.05.2018 | Physics and Astronomy

Raiding the rape field

23.05.2018 | Agricultural and Forestry Science

Turning entanglement upside down

23.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>