Carbon Cycle - Energy Mix & Fossil Fuels

Mismatch Of Energy:
  • Includes: Gas, oil and coal
  • Mined from the ground known as ‘reserves’ e.g drilling. Known as a conventional oil i.e cheapest and easiest way to get more accessible fossil fuels reserves.
  • Large reserves in Russia, USA, China and OPEC Countries (Iran)
  • Japan and France have the least amount of FF
Reliance & Access:
  • In 2015, the most energy production was that of FF like gas, oil and coal.
  • Russia using natural gas, coal and petroleum
  • Access to FF reserves is a coincidence of geological history and international boundaries
  • Some countries have more FF sources than others. Other countries have none.
  • Runs out over time as gas with the UK will become abundant due to the North Sea oil and gas
  • Remaining will increase concentration in the Middle East over the next 30 years.
Energy Pathways:
  • Any process or infrastructure which primary or secondary energy is transported across e.g pipes, national grid.
  • Disruption due to: Depletion (most important, all will run out at some point), wars, natural disasters, price fluctuations, piracy, protests, pollical relations (second important, threat is high, hardly ever happens), LEDCs
  • Russian Gas: Gazprom is the major key player. In 2008 they shut up supplies to Ukraine over pay disputes. Large economic damage and even a few deaths.
  • Extreme weather disasters e.g pipe leaks leading to domestic pathways being disrupted.
  • Transboundary pathways are needed, choke points are narrow or difficult sections of the pathway where disruption occurs. Pirates raising price.
  • Russia holds 25% of the world’s gas. Middle East 40%. Narrow ocean choke-points affecting oil flow.
Risks To Disruption:
  • There is a real risk if oil and gas are disrupted
  1. Soaring energy costs and rising energy poverty
  2. Pressure on politics to act, possibly rationing energy
  3. Civil disruption
  4. Rising cost for industry, job losses and recession
  5. Unsound decisions to rapidly develop alternative sources
  6. Diplomatic conflict.
Unconventional FF Sources:
  • Unconventional means newer and costly technology methods to access more complex reserves
  • Unconventional resources includes: tar sands and oil shale
  • Shale gas – gas trapped in shale rock that needs to be fracked (hydraulic fracturing of the rock)
  • Deep water oil – oil reserves under the sea or ocean sediments which requires very long drilling rigs.


Positives:
Negatives:
Canadian Tar Sands/Oil Shale (Oil)
Increases energy security
Sub-Arctic ecosystems destroyed
Lancashire Fracking (gas)
Creates 60,000 jobs in the UK
Groundwater pollution & small earthquakes
Reduce dependence on Russian Gas
Increase carbon dioxide emissions
Gulf of the Mexico & Deepwater Drilling (oil)
Reduce biofuel and loss of Amazon
Leaks into marine ecosystems
Billions into economy
Lots of deforestation to access the soil


Example:
Source:
Technical Challenge:
Environmental Impacts:
Canadian Tar Sands
Sands under trees forests that contain oil
MODERATE
Opencast surface mining to dig out the sands, then gas used to heat and extract the oil.
HIGH
Energy intensive extraction and destruction of ecosystems e.g water pollution
Lancashire Fracking
Shale rocks in Lancashire underground in places like Blackpool that contain gas.
MODERATE
Populated areas and farmland affected, requires ‘enhanced extraction’ of gas

MODERATE
Potentially gas could contaminate ground water and some fears over small earthquakes.
Gulf of Mexico & Deepwater Drilling
Oil in sediments under very deep ocean water
HIGH
Difficult deep ocean conditions and access to oil
MODERATE
Low impact when working well but spill occur e.g BP oil spill