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Crossing the Natural Gas Bridge Summary

Core Content

This document, Crossing the Natural Gas Bridge, explores the potential role of natural gas in the United States' transition to a secure, low-carbon energy future. It evaluates the climate and energy security implications of increased natural gas use and provides policy recommendations to guide its responsible integration.

Natural gas is positioned as a transitional fuel that can help reduce greenhouse gas (GHG) emissions compared to coal and oil. It is less carbon-intensive, produces fewer pollutants, and can be quickly deployed for electricity generation. However, it is not a long-term solution and must eventually be replaced by zero-carbon fuels or used in ways that do not add carbon to the atmosphere.

Main Points

Role of Natural Gas in the U.S. Energy Mix

• Natural gas is the third-largest contributor to the U.S. fuel mix, after oil and coal.
• It accounts for 23% of total U.S. energy demand and 22% of electricity generation.
• It is used for:
  • Industrial processes (as a feedstock and for heating)
  • Residential and commercial heating, cooling, and cooking
  • Electricity generation (due to its flexibility and low emissions)
  • Transportation (limited to compressed natural gas (CNG) in urban transit fleets)

Demand Trends

• Under a business-as-usual scenario, global natural gas demand is projected to grow by 50% between 2006 and 2030.
• In the U.S., demand is expected to increase steadily in the commercial, residential, and industrial sectors.
• In the electricity sector, demand is sensitive to price changes, and a cap-and-trade system could lead to a significant shift from coal to natural gas.
• A complete switch from coal to gas could require an additional 1.4 trillion cubic feet (tcf) of gas annually, which is 7% of projected U.S. production in 2016.

Transportation Sector

• Natural gas may play a limited role in reducing transportation emissions.
• CNG is used in urban transit fleets, but its infrastructure is not comparable to that of gasoline.
• The U.S. has only about 800 CNG stations, compared to 175,000 gasoline stations.
• A broader shift to CNG would require massive infrastructure investment and could impact electricity generation reliability.

Key Information

Supply Outlook

• The U.S. is the second-largest natural gas producer, with only 13% of its consumption imported.
• Most imports come from Canada (90% of total imports).
• Conventional gas production in North America is expected to decline, while unconventional sources (shale, tight sands, coalbed methane) are set to increase supply.

Unconventional Natural Gas

• Unconventional gas includes:
  • Shale Gas: Found in regions like the Marcellus basin, Barnett, and Haynesville basins. Technically recoverable resources range from 127 to 841 tcf.
  • Tight Gas Sands: Account for about 30% of U.S. production, with technically recoverable resources between 177 and 379 tcf.
  • Coalbed Methane: Already contributes 9% to U.S. production and can reduce methane emissions from coal mining.
  • Methane Hydrates: Potential future resource, though currently not accessible or used.

Global Market Implications

• The U.S. has a small but growing LNG import market, currently around 3% of total consumption.
• LNG prices are influenced by regional markets and oil prices.
• As North American supply may not meet rising demand, the U.S. may need to rely more on LNG imports, exposing it to global market dynamics.

Policy Recommendations

To ensure a rational and sustainable role for natural gas, the authors recommend the following policies:

• Send a clear, long-term carbon price signal to guide the transition to low-carbon technologies.
• Promote natural gas end-use efficiency standards and demand reduction to minimize reliance on gas.
• Pursue an efficient and environmentally sensitive natural gas development strategy to address both supply and environmental concerns.
• Support the development of a flexible and adequately supplied global market for natural gas to ensure reliability and affordability.
• Address costs and barriers of low-carbon electricity technologies to ensure a diverse and clean power generation mix.

Conclusion

Natural gas can serve as a bridge to a low-carbon future, but its use must be carefully managed to avoid long-term climate and energy security risks. A balanced approach that promotes clean energy alternatives while ensuring responsible natural gas development and a resilient global market is essential for the U.S. to achieve its energy and climate goals.