Oil & Gas Research
Open Access

Natural gas; Formation; Extraction; Environmental impacts; Emissions; Sustainability; Challenges; Future perspectives; Renewable natural gas; Power to gas

Natural gas, a versatile and abundant energy source, has become an integral part of the global energy landscape [1]. It plays a crucial role in meeting the energy demands of various sectors, including power generation, industry, transportation and residential use. Natural gas is a hydrocarbon mixture primarily composed of Methane (CH₄) along with smaller amounts of other gases such as ethane, propane, and butane. Its formation, extraction techniques and wide ranging applications make it a compelling subject for study and exploration.

The importance of natural gas stems from its distinct characteristics and advantages. It is a clean burning fuel compared to coal and oil, emitting lower levels of Carbon Dioxide (CO₂) and other pollutants upon combustion [2]. Additionally, natural gas is highly efficient, providing a high energy yield per unit consumed. These qualities have positioned natural gas as a transitional fuel in the global effort to mitigate greenhouse gas emissions and combat climate change.

One of the significant factors contributing to the widespread utilization of natural gas is its abundance. Natural gas reserves are found in various geological formations, including conventional reservoirs as well as unconventional sources like shale gas and tight gas formations. The exploration and extraction techniques employed to access these reserves have evolved significantly, with advancements in technologies such as hydraulic fracturing (fracking) and horizontal drilling.

Furthermore, natural gas offers enhanced energy security and economic benefits to countries with significant reserves. It enables energy diversification, reducing dependence on imported oil and promoting domestic energy production. Additionally, the availability of natural gas as a reliable and flexible energy source supports economic growth, industrial development and job creation in regions with substantial reserves.

However, the utilization of natural gas is not without challenges. Environmental concerns associated with its extraction and production processes, particularly methane emissions, pose risks to climate and air quality [3]. Additionally, the long term sustainability of natural gas as a transitional fuel is subject to ongoing discussions and debates, especially in the context of achieving a low carbon future and accelerating the adoption of renewable energy sources.

This research article aims to provide a comprehensive review of natural gas, exploring its formation, extraction techniques, global reserves, environmental impacts and potential for future energy transition. It will also examine the advantages and challenges associated with natural gas utilization, along with emerging technologies and strategies that can enhance its sustainability. By shedding light on these aspects, we can better understand the role of natural gas in the energy landscape and make informed decisions regarding its responsible use and integration with renewable energy sources.

Formation and extraction of natural gas

This section delves into the geological processes involved in the formation of natural gas and describes the different types of reservoirs where it is found. It discusses the extraction techniques, including conventional and unconventional methods such as hydraulic fracturing (fracking) and Liquefied Natural Gas (LNG) production [4].

Global reserves and production

An analysis of global natural gas reserves, production trends, and major producing regions is presented in this section. It discusses the distribution of reserves across countries and continents, highlighting the role of key players in the natural gas market.

Environmental impacts and emissions

Examining the environmental aspects of natural gas is crucial for evaluating its sustainability. This section assesses the emissions associated with natural gas extraction, processing and combustion, including greenhouse gas emissions and their implications for climate change. The potential for methane leakage during extraction and transportation is also discussed, along with mitigation strategies.

Natural gas utilization

This section explores the diverse applications of natural gas across various sectors, such as power generation, industry, transportation and residential use. It discusses the advantages of natural gas, including its lower carbon intensity compared to coal and oil, versatility and reliability.

Challenges and future perspectives

Highlighting the challenges faced by the natural gas industry, this section discusses regulatory, economic, and technological barriers to its wider adoption. It also examines the potential role of natural gas in the transition to a low-carbon future, considering its compatibility with renewable energy sources, power grid integration, and the emergence of Carbon Capture, Utilization and Storage (CCUS) technologies.

Sustainable natural gas technologies

This section presents emerging technologies and strategies that enhance the sustainability of natural gas, such as biogas production from organic waste, power to gas conversion, and the utilization of Renewable Natural Gas (RNG). It discusses the potential of these technologies to reduce emissions and enhance the environmental performance of natural gas.

Role of natural gas in the energy mix

Natural gas plays a crucial role in the global energy mix, contributing significantly to power generation, heating, transportation, and industrial processes. Its versatility and abundance make it a valuable resource for meeting various energy needs. In the power sector, natural gas fired power plants provide a reliable and flexible source of electricity, complementing intermittent renewable energy sources [5]. Natural gas is also used extensively in residential and commercial sectors for heating and cooking purposes. Moreover, it serves as a feedstock for various industrial processes, such as the production of chemicals, fertilizers and synthetic materials.

Environmental impacts

While natural gas combustion emits fewer pollutants compared to coal and oil, its extraction and production processes can have environmental consequences. Methane, a potent greenhouse gas, can escape during drilling, extraction and transportation, contributing to climate change. However, advancements in technology and regulatory measures are being implemented to reduce methane emissions and improve environmental performance. Additionally, natural gas can serve as a bridging fuel to transition from higher emission fossil fuels to renewable energy sources, contributing to emissions reductions.

Energy security and economic benefits

Natural gas reserves are geographically diverse, providing countries with energy security and reducing dependence on imported oil. Regions with significant natural gas reserves can strengthen their domestic energy production, fostering economic growth and reducing trade deficits. Moreover, the development of natural gas infrastructure, such as pipelines and Liquefied Natural Gas (LNG) terminals, can create employment opportunities and stimulate economic activity.

Challenges and considerations

The utilization of natural gas is not without challenges. One significant concern is the potential environmental impact of hydraulic fracturing, which is used to extract natural gas from shale formations. Proper regulations and monitoring are crucial to minimize the environmental risks associated with this extraction technique. Additionally, the long term sustainability of natural gas as a transitional fuel raises questions regarding its compatibility with global climate targets and the need to accelerate the deployment of renewable energy technologies. Balancing natural gas utilization with renewable energy integration and investing in research and development for cleaner energy alternatives are essential considerations.

Emerging technologies and sustainability

To enhance the sustainability of natural gas, several technologies and strategies are being explored. Renewable Natural Gas (RNG), produced from organic waste and landfills, offers a low carbon alternative to traditional natural gas. Power to gas conversion, which converts excess renewable electricity into hydrogen or synthetic natural gas, can facilitate energy storage and grid balancing [6]. Carbon Capture, Utilization and Storage (CCUS) technologies have the potential to capture and store carbon dioxide emissions from natural gas power plants, reducing their environmental impact.

International cooperation and policy frameworks

International collaboration is crucial for the responsible development and use of natural gas. Establishing clear regulatory frameworks, sharing best practices and promoting transparency are vital for ensuring environmental protection, promoting energy security, and fostering sustainable development. International agreements and initiatives, such as the Paris agreement, aim to address climate change and encourage the transition to cleaner energy systems, including the responsible use of natural gas.

In conclusion, natural gas plays a significant role in the global energy mix, offering advantages such as versatility, abundance, and lower emissions compared to other fossil fuels. However, careful consideration of its environmental impacts, along with the need for a transition to renewable energy sources, is essential. By embracing emerging technologies and sustainable practices, natural gas can contribute to a more balanced and cleaner energy future, supporting the goals of mitigating climate change and ensuring energy security.

1. Valdes J, Gonzalez AB, Macia YM, Dorner W, Camargo LR (2020) Unveiling the potential for combined heat and power in Chilean industry-A policy perspective. Energy Policy 140: 111331.

   [Crossref] [Google Scholar]

2. Yu D, Wu D, Liu JY, Li Y, Sun WM (2020) Unveiling the potential of superalkali cation Li 3+ for capturing nitrogen. Phys Chem Chem Phys 22: 26536-26543.

   [Crossref] [Google Scholar] [PubMed]

3. Navas-Anguita Z, Garcia-Gusano D, Dufour J, Iribarren D (2021) Revisiting the role of steam methane reforming with CO2 capture and storage for long-term hydrogen production. Sci Total Environ 771: 145432.

   [Crossref] [Google Scholar] [PubMed]

4. Healy N, Stephens JC, Malin SA (2019) Embodied energy injustices: Unveiling and politicizing the transboundary harms of fossil fuel extractivism and fossil fuel supply chains. Energy Res Soc Sci 48: 219-234.

   [Crossref] [Google Scholar]

5. Carminati HB, de Medeiros JL, Ofelia de Queiroz FA (2021) Sustainable Gas-to-Wire via dry reforming of carbonated natural gas: Ionic-liquid pre-combustion capture and thermodynamic efficiency. Renew Sust Energ Rev 151: 111534.

   [Crossref] [Google Scholar]

6. Corrado S, Caldeira C, Carmona-Garcia G, Korner I, Leip A, et al. (2020) Unveiling the potential for an efficient use of nitrogen along the food supply and consumption chain. Glob Food Sec 25: 100368.

   [Crossref] [Google Scholar] [PubMed]