In this blog post, we will examine the reasons and background behind the continued pursuit of overseas resource development—particularly oil development—despite its high risks and repeated failures, with a focus on the technical limitations of oil exploration.
Introduction
Overseas resource development—often referred to as resource development projects or part of “resource diplomacy”—has long been one of the key priorities of South Korea’s energy policy. In the past, negative perceptions of overseas resource development spread as large-scale losses from certain projects, poor investments, and controversies surrounding resource diplomacy became the subject of public criticism.
However, recent international developments have brought about significant changes in the perspective on overseas resource development. Supply chain instability has intensified since the COVID-19 pandemic, and the Russia-Ukraine war and escalating tensions in the Middle East have led to sharp fluctuations in energy prices. These events have once again demonstrated how crucial securing a stable supply of energy resources is to the national economy and industrial competitiveness.
South Korea is a country with very limited energy resources. It relies on imports for most of its crude oil and natural gas, and industries such as refining, petrochemicals, steel, and transportation remain heavily dependent on fossil fuels. Furthermore, although the structure of power generation is changing and the share of renewable energy is expanding, oil and natural gas remain critically important across the industrial sector. Therefore, overseas resource development should be understood not merely as a business venture aimed at generating profits, but as a strategic choice to ensure national energy security.
International oil prices are influenced by various factors, including supply and demand, exchange rates, geopolitical risks, and the policies of oil-producing countries. In particular, the production policies of major oil-producing countries have a significant impact on the global economy, and countries with high energy import dependence are inevitably more vulnerable to these external variables. Overseas resource development is utilized as a means to partially mitigate these risks and diversify energy supply chains.
For this reason, despite the high risks involved, overseas resource development remains a field that major countries around the world are reluctant to abandon.
Technical Limitations of Reserve Estimation
One of the main reasons the public has become skeptical of overseas resource development is the history of repeated failures. However, it is also important to understand that oil exploration is, by its very nature, a field characterized by a high degree of uncertainty.
The most important concept in oil exploration is “reserves.” While the media often uses phrases such as “the discovery of billions of barrels of oil,” in reality, these figures are closer to estimates derived through complex geological and engineering analyses.
Generally, “resources” refer to the total amount of oil that may exist underground. In contrast, “reserves” refer to the amount of oil that has been confirmed through actual drilling and can be produced based on current technological capabilities and economic viability. Therefore, resources and reserves are distinct concepts, and there is significant uncertainty in reserve estimates.
Petroleum Initially In Place (PIIP), which serves as the basis for reserve estimates, is calculated using factors such as the area and thickness of the reservoir, porosity, and fluid saturation. Simply put, it is a method of estimation based on a comprehensive analysis of the size and quality of the underground rock containing the oil.
The problem is that this information cannot be verified directly. In the actual exploration process, wells are drilled into strata thousands of meters deep to measure physical property data—such as gamma-ray, electrical resistivity, density, and seismic wave data—and the subsurface structure is then indirectly interpreted based on this data. Although 3D seismic surveys and AI-based data analysis technologies have recently been utilized, significant errors and uncertainties still exist in data interpretation because the subsurface cannot be directly observed.
Another issue is the interpreter’s judgment. Even when analyzing the same data, results can vary depending on the expert’s experience and analytical criteria. In some cases, a more optimistic interpretation may be made, while in others, a very conservative assessment may be reached. Therefore, while reserve estimates are based on scientific analysis, they inevitably involve a certain degree of estimation and probability.
Why Do Oil Exploration Projects Often Fail?
Oil exploration is inherently a low-probability venture. Just because geological conditions appear favorable does not guarantee the discovery of an oil field capable of commercial production. In fact, even the world’s major oil companies have low exploration success rates, and only a fraction of the numerous exploration projects actually progress to the production stage.
Even if exploration is successful, not all problems are solved. If the reserves are insufficient or production costs are excessively high, the project may not be economically viable. Furthermore, if international oil prices fall, profitability can deteriorate sharply; conversely, if oil prices rise, fields previously deemed uneconomical may regain attention.
On top of this, various risk factors exist, such as exchange rate fluctuations, political instability, and stricter environmental regulations. In particular, with the recent expansion of carbon-neutrality policies and the growing emphasis on ESG management, the oil industry is also facing new challenges. As such, oil development can be described as a high-risk industry that simultaneously entails not only geological risks but also economic, political, and environmental risks.
Why Oil Development Continues Even in the Era of Carbon Neutrality
Today, the world is pushing for carbon neutrality and the expansion of renewable energy. With the increasing adoption of electric vehicles and the expansion of solar and wind power, many predict that the role of fossil fuels will diminish.
However, in reality, oil remains a key energy source that powers the global economy. Numerous industries rely on oil—not only for automotive fuel but also for jet fuel, marine fuel, petrochemical feedstocks, plastics, synthetic fibers, and fertilizers. Furthermore, despite the growing share of renewable energy, oil and natural gas still account for a very large proportion of global energy consumption.
For this reason, many countries are continuing to invest in securing oil and natural gas even as they pursue the energy transition. In fact, the United States, China, and European nations have not completely abandoned their resource development policies in order to ensure their energy security and industrial competitiveness.
Ultimately, overseas resource development is not a venture pursued solely for profit. It is a field where various factors—including energy security, supply chain stability, industrial competitiveness, and national strategy—interact in a complex manner. Therefore, the value of overseas resource development is difficult to assess based solely on a simple profit-and-loss calculation.
Perspectives on Overseas Resource Development
Overseas resource development is undoubtedly a high-risk endeavor. Poor investment decisions, substandard management, and inefficient operations must be addressed, and since taxpayer money is involved, a high level of transparency and accountability is required.
However, given South Korea’s high dependence on energy imports, it is difficult to abandon overseas resource development outright. The key issue is not whether to halt the projects themselves, but rather how to reduce risks and enhance investment efficiency through scientific and systematic evaluations.
Furthermore, there has recently been a growing movement to establish a comprehensive resource strategy linked to natural gas, critical minerals, hydrogen, and carbon capture and storage (CCS), rather than focusing solely on securing oil. This demonstrates that the concept of energy security is expanding beyond the mere securing of crude oil to ensure the stability of the entire supply chain.
Ultimately, the debate over overseas resource development is likely to continue. However, that discussion must begin with an understanding not only of the outcomes of success and failure but also of the technical limitations of oil exploration and the importance of energy security.
