the energy return of tar sands

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The Energy Return of Tar Sands | Energy Central

 · When evaluating energy technologies - whether conventional fossil fuels or alternative energy - one thing that I pay close attention to is the Energy Return on Energy Invested (EROEI). While there are legitimate criticisms of...

Analysts Raise Eyebrows After Exxon ''Re-Books'' 3.2 …

ExxonMobil is running into some second-guessing from analysts after bringing 3.2 billion barrels of tar sands/oil sands crude back into its active reserves. "We are skeptical about the quiet return of these prodigal oil sands reserves," write Tom Sanzillo and Kathy Hipple of the Institute for Energy Economics and Financial Analysis (IEEFA), in a briefing note released last week.

Fossil Fuels-Energy Return on Energy Invested

Tar-Sands Oil EROEI Natural-Gas EROEI Coal EROEI Conclusion References Introduction Early in the history of fossil-fuels extraction the energy available in the minerals extracted was high. However, as the more-easily extractable minerals are no longer

Recognition of tar sands development — Energy …

The development of the 300 million tonnes of the very heavy oil in south Trinidad known as tar sands may actually become a possibility in due course now that energy and energy industries minister, Nicole Olivierre, has spoken on the matter – the first time any

ENERGY BREAKEVEN The Energy Return On Investment …

ENERGY BREAKEVEN The Energy Return On Investment (EROI) for tar sands exploitation is extremely low, on the order of 5-10 percent. The development is occurring, but the long-term costs and tradeoffs are questionable. By investing in one form of development ...

(PDF) Energy Return on Investment of Canadian Oil …

Brandt, A.R.; Englander, J. The ener gy efficiency of oil sands extraction: Energy return ratios from 1970 to 2010. Energy 2013, 55, 693–702 ...

How is oil extracted from tar sands?

 · Energy source. Both methods of extraction are energy-intensive processes 5. Consequently, large amounts of energy are needed to generate heat to extract the bitumen from oil sands and upgrade it to synthetic crude oil 5. In general, this energy source typically comes from natural gas 5.

This is the world''s most destructive oil operation—and …

Tar sands operators could reduce their pollution and better manage the tailings waste problems, but they''re reluctant to spend the money, Belanger says. As a result of these issues, tar sands oils have a higher environmental cost than other sources, he notes.

Oil Sands Mining Uses Up Almost as Much Energy as It …

 · Tar sands retrieved by surface mining has an EROI of only about 5:1, according to research released Tuesday. Tar sands retrieved from deeper beneath the …

Energy return on investment

We apply a new methodology and new dataset to compute ERRs (energy return ratios) for the oil sands industry. We collected monthly oil sands energy consumption and output data from 1970 to 2010. Current oil sands operations have mine mouth NERs (net energy returns) of about 6 GJ output per GJ of energy consumed and point of use energy returns of about 3 GJ/GJ.

Alberta oilsands'' energy return on investment steadily …

Their article Energy Return on Investment of Canadian Oil Sands Extraction from 2009 to 2015 has just been published in the international journal Energies. To conduct the study, the authors used a tool called "energy return on investment," essentially calculating the energy return to society divided by the energy required to get the energy.

Energy return on investment

Tar sands: There are no peer-reviewed, published estimates of the EROI for tar sands, as far as I could tell. Inman drew on a paper by Adam Brandt of Stanford University (Adam Brandt et al., "The energy efficiency of oil sands extraction: Energy return ratios from 1970 to 2010," under review byEnergy).

Alberta, Canada''s oil sands is the world''s most destructive …

 · The oil sands give Alberta the third largest reserves in the world, but extracting the oil is energy-intensive and destructive to the landscape. Photograph By Ian Willms Please be respectful of ...

The Oil Drum | Low energy return on investment (EROI) …

If one is concerned about the ability of the oil sands to provide net energy to society relative to the energy that they consume from other sectors, then one may actually more concerned with a ratio that we define as the net external energy return (NEER).

Oil Sands Mining Uses Up Almost as Much Energy as It …

"But that characteristic high energy return on investment fuel from much of the last century is no longer here." The latest EROI values for tar sands were calculated by David Hughes, a fellow at the Post Carbon Institute, a non-profit devoted to issues such as climate change and energy scarcity, based in Santa Rosa, Calif.

10 Threats from the Canadian Tar Sands Industry | NRDC

 · 4. Burning tar sands oil creates more pollution than regular crude. Because of its sludgy composition, mining and refining tar sands oil demands an enormous amount of energy. Tar sands …

Mud, sweat and tears | Energy | The Guardian

 · The vast tar sands of Alberta in Canada hold oil reserves six times the size of Saudi Arabia''s. But this ''black gold'' is proving a mixed blessing for the frontier town of Fort ...

Tar Sands Oil: Pros and Cons

The net energy return on energy invested ratio of tar sands oil by the time it is converted to gasoline is roughly half that of the equivalent process for conventional crude oil. It is the largest ...

tar sands | Energy Reality

The energy returned on energy invested of tar sands is between 3:1 and 5:1 — much lower than conventional oil — making tar sands an exceptionally high-cost and low-net-energy oil.

Exxon Rips Up $30-Billion Rebuilding Plan, Could Declare …

Exxon''s massive Kearl Lake mine north of Fort McMurray may be the latest tar sands/oil sands to be devalued as one of the colossal fossil considers designating up to one-fifth of its global oil and gas reserves as stranded assets.

The Energy Return of Tar Sands – R-Squared Energy

When evaluating energy technologies – whether conventional fossil fuels or alternative energy – one thing that I pay close attention to is the Energy Return on Energy Invested (EROEI). While there are legitimate criticisms of the methodology, it can serve as a useful tool for comparing and contrasting various alternatives.

The energy efficiency of oil sands extraction: Energy …

 · Oil sands operations have become significantly more energy efficient over the history of the industry. • Oil sands production is largely fueled with energy from the bitumen resource itself, making external energy returns high. • Oil sands production is still significantly

tar sands | Energy Reality

Oil Sands Mining Uses Up Almost as Much Energy as It ...

The energy efficiency of oil sands extraction: Energy …

We apply a new methodology and new dataset to compute ERRs (energy return ratios) for the oil sands industry. We collected monthly oil sands energy consumption and output data from 1970 to 2010. Current oil sands operations have mine mouth NERs (net energy returns) of about 6 GJ output per GJ of energy consumed and point of use energy returns of about 3 GJ/GJ.

The Cost of Production and Energy Return of Oil Sands

 · Geologist David Hughes calculated that the tar sands retrieved by surface mining has an EROI of about 5:1, and as low as 2.9:1 for tar sands retrieved from deeper beneath the earth. Hughes''s figures include the energy it takes to mine bitumen as well as to upgrade it …

TAR SANDS – the worst of possible fuels – One World, …

EROEI (Energy Return on Energy Invested) or (ER/EI) shrinks to one, i.e. there is no gain in energy after the work of extraction and processing. Of all the major fossil fuel types being commercially extracted today, Tar Sands have the lowest EROEI.

Tar Sands Facts | Indigenous Environmental Network

Tar Sands Facts: The technical term for the oil extracted from tar sands is crude bitumen, which is defined as a viscous (thick), heavy oil that will not flow to a well in its natural state. Crude bitumen is extracted from the mined tar sands through a process that mixes

The energy efficiency of oil sands extraction: Energy …

The EROI of liquid biofuels and oil from tar sands is so low as not to represent important viable ... found that oil sands production has an energy return of 6 at the mine mouth and 3 at the point ...