By John Q. Hosedrinker 
According to an analysis by the US Energy Information Administration, China significantly replenished its strategic oil reserves in 2025, adding an average of 1.1 million barrels per day to reach nearly 1.4 billion barrels by December. This build-up, which included both state and commercial reserves, continued into early 2026 before the onset of the conflict in Iran. The administration estimates that by December 2025, China’s state reserves approximated 360 million barrels, while its commercial reserves reached about 1 billion barrels.
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China’s strategic foresight in accumulating substantial oil reserves before the outbreak of war in Iran stands out as a remarkable display of long-term planning. The simple logic dictates that initiating hostilities without adequately securing essential resources, like oil, would be an act of incredible folly. This sentiment is echoed by observations that America, too, had a similar window of opportunity, with the then-president announcing intentions to refill the strategic petroleum reserve, a promise that ultimately went unfulfilled. The period leading up to potential global disruptions, specifically around 2025, saw China actively replenishing its strategic oil reserves at an impressive average of 1.1 million barrels per day.
The sheer scale of China’s efforts can be illustrated by analyzing available estimates. While precise figures are often proprietary, estimations suggest that by December 2025, China’s state reserves hovered around 360 million barrels. However, when factoring in the daily replenishment rate, a different picture emerges. A simple calculation of 365 days multiplied by 1.1 million barrels per day yields approximately 401.5 million barrels added in that year alone. This suggests a significant net increase in reserves during that period, far exceeding the reported year-end total. Even excluding the entire month of December from the calculation, the numbers still indicate a substantial accumulation. This discrepancy, while perhaps a result of estimation methods, points towards a concerted and aggressive stocking strategy.
China’s approach to this strategic buildup is characterized by its intelligence and long-term vision. It’s widely acknowledged that China is not a monolithic entity when it comes to oil suppliers; they are indeed quite diversified. This diversification includes securing oil from sources such as Russia, indicating a keen understanding of geopolitical leverage and supply chain resilience. Furthermore, China possesses significant untapped oil reserves within its own western provinces, though extracting these at a scale to fully replace imports is a challenge that would likely span decades due to extraction depth and infrastructure requirements. Regardless, the proactive stockpiling suggests a clear anticipation of future energy needs and potential supply disruptions.
The question of whether China has already begun tapping into these reserves is an important one, especially as global events unfold. While initially drawing down from imported fuel was likely the primary strategy, recent developments suggest that China has indeed given the go-ahead to begin utilizing its stockpiled reserves as the war in Iran drags on. This move, reported in early April 2026, underscores the immediate impact of sustained conflict on global energy markets and China’s readiness to deploy its strategic assets.
In parallel with its reserve accumulation, China has also been actively increasing its imports from diverse sources. Notably, in 2025, there was an observable increase in imports of Western Canada Select, with tankers being loaded on Canada’s west coast. While a significant portion of Canadian oil exports continue to flow south to the United States, China’s share, though smaller in absolute terms, saw a notable expansion over the preceding 18 months. This strategic sourcing highlights China’s commitment to securing energy supplies from wherever it can, demonstrating a comprehensive strategy to bridge any potential energy gaps.
Beyond oil reserves and imports, China’s broader energy strategy is also noteworthy. The country is home to two of the world’s highest energy-generating hydroelectric dams, including the colossal Three Gorges Dam. Furthermore, they are undertaking the construction of a hydroelectric project on the Tibetan plateau that is expected to be three times the size of the Three Gorges Dam. This ambition in renewable energy, alongside a heavy investment in electric vehicles and massive installations of solar, wind, and nuclear energy, further demonstrates a long-term commitment to energy independence and reducing reliance on volatile global oil markets, particularly from the Middle East.
The rationale behind China’s aggressive oil stockpiling is multifaceted, extending beyond simply preparing for a war in Iran. It’s widely believed to be a significant countermeasure against potential blockades of critical maritime routes, such as the Malacca Strait. Such blockades have long been identified as a strategic vulnerability for China, particularly in any potential conflict with the United States and its allies. Therefore, building substantial oil reserves provides a crucial buffer, allowing the nation to sustain itself even if its primary shipping lanes are compromised. This strategic foresight aligns with the understanding that countries benefit greatly from accumulating reserves of vital resources, especially in an era marked by increasing geopolitical tensions and the potential for aggressive actions by global powers.
The comparison with the United States’ own strategic petroleum reserve (SPR) further illuminates China’s strategic advantage. While the U.S. announced intentions to refill its SPR, these plans did not materialize. This inaction, especially in the face of known geopolitical escalations, stands in stark contrast to China’s methodical and extensive stockpiling. The ability to acquire oil at historically low prices before a major conflict erupts is a significant economic and strategic advantage. For China, this was further facilitated by their astute diplomacy, which, for instance, pressured India to reduce its purchases of Russian oil, inadvertently making Russian oil even more affordable for China.
The notion that China’s actions are solely a response to the war in Iran might be too narrow an interpretation. It’s more accurately viewed as a calculated strategy informed by decades of geopolitical awareness and a deep understanding of potential threats. China has a history spanning millennia, and this extensive experience likely informs their patient, long-term approach to national security and economic stability. This includes not only securing energy but also developing robust domestic industries, such as electric vehicles and renewable energy technologies, many of which are now manufactured in China. This comprehensive approach positions China to better weather global energy shocks, regardless of their origin, and potentially even capitalize on them by driving demand for their advanced green technologies.