If you look at any of the reports on energy or happen to browse the Energy Information Administration’s (EIA) website (www.eia.gov), you will see a large number of links to articles about the rapid growth of shale gas and tight oil. In fact, President Obama, in his State of the Union address, talked “about the role shale gas can play in providing clean, reasonably-priced domestic energy.” But shale gas is not just a game changer for the US; globally, the rapid growth of shale gas production has tremendous implications for energy production and consumption.
At the ISA Executive Summit held in Greensboro, NC earlier this year, Society leaders identified the growing global demand for energy as one of 10 game changing trend rivers impacting the future of the automation industry and ISA. We also recognized the rapid growth of shale gas, its impact on the cost and consumption of natural gas, and the potential shale gas opportunity for ISA.
In this article we will review basic shale gas concepts, take a look at the global opportunity, touch briefly on new technologies being used, and look at environmental impacts. Finally, we’ll pose a few questions: How might ISA engage with this industry/market? Are there potential training and/or workforce development opportunities for ISA related to shale gas or other unconventional energy resources? What else might ISA do?
What is shale gas? According to the Energy Information Administration or EIA, shale gas is natural gas (primarily methane) which is trapped inside formations of shale. Shales are fine grained sedimentary rocks that may be rich sources of natural gas and petroleum. (http://energy.gov/articles/producing-natural-gas-shale)
How were these formations formed? Geologists believe that during the Devonian period of Earth’s history (300-400 million years ago) shale formations were formed…“Shales were deposited as fine silt and clay particles at the bottom of relatively enclosed bodies of water.” Around the same time forests were being formed on land from primitive plants and the first amphibians appeared. “Some of the methane that formed from the organic matter buried with the sediments escaped into sandy rock layers adjacent to the shales, forming conventional accumulations of natural gas which are relatively easy to extract. But some of it remained locked in the tight, low permeability shale layers, becoming shale gas.” (http://www.energy.gov/sites/prod/files/2013/04/f0/what_is_shale_gas.pdf)
How is shale gas recovered? Shale gas is recovered from shale formations using horizontal drilling and hydraulic fracturing or “fracking.” (http://www.eia.gov/energy_in_brief/article/about_shale_gas.cfm)
The combination of hydraulic fracking and horizontal drilling has transformed organic-rich shales that were previously unproductive into some of the largest, most productive natural gas fields in the world. “The Marcellus Shale, Utica Shale, Barnett Shale, Eagle Ford Shale and Bakken Formation are examples of previously unproductive rock units that have been converted into fantastic gas or oil fields by hydraulic fracturing.” www.eia.gov
What shale gas resources are available globally? Advanced Resources International, Inc. (ARI) was commissioned by the Energy Information Administration (EIA) to complete an initial assessment of international shale gas resources. The report looked at almost 70 shale gas formations in 48 basins located in 32 countries and showed reserves of 6,622 trillion cubic feet of technically recoverable shale gas in the 32 countries analyzed. The map below shows the location of these basins and the regions analyzed in the study. For the full report, go to: http://geology.com/energy/world-shale-gas/.
Why is this important? Why should you care? Here’s a fast fact to remember: According to the EIA, just 1 trillion cubic feet of natural gas is enough to heat 15 million homes for one year, generate 100 billion kilowatt hours of electricity, or fuel 12 million natural-gas-fired vehicles for one year.
And by 2035, the EIA projects that shale gas production will rise to 13.6 trillion cubic feet, representing nearly half of all US natural gas production. (www.eia.gov)
What new shale gas technologies are available related to hydraulic fracking?
In April of this year, I attended the NAE-AAES Convocation of Professional Engineering Societies in Washington, DC. In his presentation, Dr. Jeff Spath, 2014 SPE president, Schlumberger Limited, talked about new technological advances for unconventional energy resources, including:
- Wellbore Placement & Geologic Steering – Technology has taken us from geometric to geologic forms of drilling, optimizing drilling of the well to the “sweet spot” using geologic steering
- Electromagnetic look ahead drilling – Allows us to look ahead of the drill bit 10 to 60 feet away
- Multi-stage fracturing – Allows us to increase contact between the well and flow from 315 sq. ft. to 160K sq. ft. using single stage fracking to 2.4M sq. ft. with Multi-stage fracking
- Micro seismic monitoring/interpretation – Allows us to listen to the horizontal wells fractured, gives us an acoustic measurement plus visualization of the fractures, and allows us to optimize the way we take advantage of the flow. (https://www.nae.edu/File.aspx?id=113225) The technology combines subsurface sensors with powerful data collection and analysis software torecord the myriad of tiny microseisms (or micro earthquakes) that occur as fluid is pumped into a well bore, splitting or fracturing the subsurface rock formation holding the natural gas or oil. The individual locations of these micro seismic events are mapped to create an image of the fracture locations. To monitor each of these small events, high detection sensitivity devices are used. In addition to improving efficiency, the use of these systems also allows us to reduce the environmental impact of fracking. (http://www.ussensorsystems.com/oil-hydro.html)
Another hot topic of discussion was the potential use of liquid CO2 to replace water in the fracking process. Mr. C. Michael Ming, P.E., general manager, Oil & Gas Technology Center, GE Global Research, spoke to us about Unconventional Resources & State of R&D. Michael said we are in “the Age of Gas,” stating that natural gas is taking a larger role in the global energy mix because it’s affordable, reliable, and dispatchable. He talked about the research and development effort that is taking in place in these areas using technologiesthat are better, cheaper, faster, safer, cleaner, and smarter:
- Production Systems
- Well Construction
- Energy Systems
- Water Treatment
- CO2 EOR & Fracturing (enhanced oil recovery and to replace water in fracturing)
See the presentation at: https://www.nae.edu/File.aspx?id=113229.
Recently, GE, which is studying the issue under a $10 billion research program, stated that “carbon dioxide, used for years to force crude oil out of old wells, likely will not replace water in fracking anytime soon because of technical challenges and limited infrastructure”.
GE is making a push into oilfield technology and is studying how a chilled form of CO2 known as a “super-critical fluid”—which is neither a liquid nor a solid—could be used as the new industry standard for hydraulic fracturing, (or fracking). The company is working on the project with Norwegian oil and gas producer Statoil ASA as part of GE’s ecomagination program, a program that focuses on gas turbine efficiency, wind blade design and other energy projects.(http://www.reuters.com/article/2014/04/07/generalelectric-fracking-carbon-idUSL1N0MT1HN20140407)
What about shale gas production and the environment?
Mr. Scott Anderson, senior policy advisory, Environmental Defense Fund, talked about eight risk areas associated with hydraulic fracking. The eight risks mentioned were:
- Well integrity – There are 136 elements critical to well integrity. Lack of well integrity can pollute water or cause leaking to the environment during construction and for lifetime.
- Induced Seismicity – Fracking can cause earthquakes. The earthquakes are caused by injection of fluid (resulting in 40 x increases in earthquakes that measure 4.0 on the Richter scale) and 2.0 quakes.
- Surface erosion – Fracking causes erosion of the soil.
- Water Use – Excessive use of water in the fracking process is a drain on resources.
- Surface spills – Waste from fracking can affect ground water.
- Recycling Risks – Due to storage, new forms of transportation, handling of residual waste streams, there are recycling risks.
- Air quality – While clear methane emissions are not so high to affect greenhouse advantages, air toxins, and fugitive methanes are by products of fracking.
- Infrastructure environmental impact – There can also be increased noise, dust, increased traffic, traffic congestion, and related fatalities. (https://www.nae.edu/Projects/Events/71511/113103/113105.aspx)
These risks are also cited by the EIA a list of potential environmental concerns related to hydraulic fracturing for shale gas since the fracturing of wells requires large amounts of water and produces large amounts of wastewater. Some of these concerns include:
- Significant use of water for shale gas production may affect the availability of water for other uses and can affect aquatic habitats.
- Hydraulic fracturing fluid may contain potentially hazardous chemicals. If mismanaged, these materials can be released by spills, leaks, faulty well construction, or other exposure pathways, which may contaminate surrounding areas.
- Wastewater from fracturing may contain dissolved chemicals and other contaminants that could require treatment before disposal or reuse. Wastewater treatment and disposal because of the quantities of water used and the complexities inherent in treating some of the wastewater components, treatment and disposal is an important and challenging issue.
- Hydraulic fracturing causes small earthquakes, but they are almost always too small to be a safety concern (reference the United States Geological Survey). Fracking fluids and formation waters (wastewater) are returned to the surface. The injection of wastewater into the subsurface can cause earthquakes that are large enough to be felt and may cause damage.” (http://www.eia.gov/energy_in_brief/article/about_shale_gas.cfm)
“If we did all the things we are capable of, we would literally astound ourselves” Thomas Edison
What are the implications for ISA? One of ISA’s strategic goals is to look at Big Data, to use analytics so that ISA’s products and services are market driven.
For the US, the EIA’s report “Outlook for U.S. shale oil & gas” projects that:
- Shale gas will lead the growth in total gas production through 2040 to reach half of US output
- Natural gas prices will remain well below crude oil prices
- Natural gas consumption growth driven by electric power, industrial, and transportation use
- Manufacturing output and natural gas use will grow with lower natural gas prices
- Rapid growth of natural gas use in the transportation sector, especially in freight trucks
- US becomes a net exporter of natural gas in the near future
- Energy-related CO2 emissions remain below 2005 levels for the forecast period
Read the full report at www.eia.gov.
While I have not researched the implications for each of the 32 countries included in the EIA assessment, ISA might begin by looking at the data to understand how this phenomenal growth in shale gas and tight oil affects the automation industry, not just in the US but around the globe.
Are there opportunities for ISA to provide training, certifications, certificate programs, or standards related to shale gas production, water and wastewater, leak detection and repair, or micro seismic hydrofrack monitoring? Do we have existing products and services that can be applied to shale? Are there opportunities for ISA to develop new standards, products, and services related to shale gas or tight oil? What else might ISA do?
If you are engaged in shale gas and tight oil initiatives and are interested in helping to investigate the shale gas opportunity for ISA, please let Society leadership know. Contact me at email@example.com.
A version of this article also has been published in ISA Insights.