Four-fifths of Kazakhstan's oil hangs on one terminal in a war zone

The noise is at the table, the constraint at the terminal

The headline came from Central Asia on 8 October. According to the Times of Central Asia, the eight partners in the Tengiz and Kashagan fields have launched a feasibility study. The route would carry up to 35 million tonnes of crude a year from Atyrau to Aktau, across the Caspian to Baku and into the BTC (Baku–Tbilisi–Ceyhan) pipeline; results are due in November. The route is being read as a move to break Kazakhstan's dependence on Russia.

The quiet parameter lies elsewhere. Four-fifths of Kazakhstan's oil depends on a single marine terminal on a Black Sea that is inside the war, and when that terminal shuts the country has to choke back wells within days. The constraint in this report is not whether an alternative route exists, but how many days Kazakhstan can hold out when the CPC (Caspian Pipeline Consortium) is cut off.

Constraint 1 · Logistics: one terminal, two Russian corridors

According to an Astana Times analysis of 7 September, 64.8 million tonnes, or about 82%, of the 78.8 million tonnes of 2025 exports tracked by route passed through the CPC. The Atyrau–Samara pipeline came second with 9.3 million tonnes; together the two Russian corridors carried about 94% of the volume. Aktau shipped 3.5 million tonnes and the China pipeline 1.1 million. The Times of Central Asia says the CPC line is 1,511km long and carries about 2% of global daily crude supply; Russia holds 31% of the consortium, Kazakhstan 20.75% and Chevron 15%.

The terminal now sits squarely inside the front line. According to the Maritime Executive, three tankers loading at CPC buoys were hit by drones on 19–20 July and loading stopped twice; Kazakhstan's foreign and energy ministries condemned it as the fifth attack. The Times of Central Asia reports that six tankers were hit over the course of July. According to Qazinform, a drone incident near the terminal on 8 September again halted loading at the SPM-2 and SPM-3 buoys. The KSE Institute's tracker of 5 October shows Russia's crude exports from its Black Sea ports fell 55.9% month on month in August; the CPC is a neighbour of the same port.

Constraint 2 · Supply security: the threshold is one day

The July episode revealed the threshold. According to the Times of Central Asia, the CPC stopped accepting Kazakh crude on 21 July because its storage was full. The next day national output fell from the July average of 2.07 million barrels a day to 1.63 million, a 21% drop. At Tengiz the fall was 56%, from 925,000 barrels a day to about 406,000. In short, when the terminal shuts, the buffer is measured in hours, not days.

Alternative capacity does not close this gap. A Times of Central Asia analysis of 8 October puts short-notice diversion to rail or ports at about 100,000 tonnes a month. That is less than a day of Tengiz output. Energy Minister Akkenzhenov said disruptions in January, June and July cost about 3.5 million tonnes; the same report says the 2026 output target was cut from 98 million tonnes to 96 million. Reports in late July still gave the target as 98 million tonnes; the date of the official revision could not be verified.

The BTC has the pipe but not the bridge. According to the Times of Central Asia, BTC's throughput capacity is 1.2 million barrels a day. BOTAŞ data reported by Report.az show the line carried 96.934 million barrels through Türkiye in the first half of 2026; by our calculation that is about 535,000 barrels a day, or 45% of capacity. The bottleneck is the tanker bridge across the Caspian: according to AzerNews, Kazakhstan sent only 704,000 tonnes to the BTC via Aktau in the first half. The 2026 target varies by source: 1.5–2.2 million tonnes (AzerNews), 2.2 million tonnes (Astana Times) or 1.6 million tonnes (Times of Central Asia, July). The 2025 figure also diverges, between 1.2 and 1.3 million tonnes.

Second-order effects · From Kazakh wellhead to Ceyhan

The chain first hits Kazakhstan's budget. According to the Times of Central Asia, IMF data put 2025 oil exports at about $41.3 billion of $81.3 billion in goods exports, and Tengizchevroil paid $10.6 billion directly to the state in 2025. A prolonged CPC outage would cut off, within days, the flow that carries half of that revenue.

The second link is Europe. According to the Astana Times, the EU imported 52.4 million tonnes of Kazakh crude in 2024, making Kazakhstan its third-largest external supplier. An outage would further squeeze Mediterranean supply of light crude, already tight because of Hormuz; Brent closed up 4.1% at $104.28 on 8 October. The third link is Türkiye: if a trans-Caspian route or a larger tanker fleet comes on line, extra volume flows to Ceyhan and BTC's 55% spare capacity strengthens Türkiye's role as a corridor. That link will take years; November's feasibility study is only a first step.

Falsifier

Two developments would refute this thesis. First, if the CPC terminal suffers no attack-related stoppage longer than 48 hours through 31 December and Kazakh output stays above 2 million barrels a day in September–November, the terminal risk is smaller than priced. Second, if Kazakh volumes sent to the BTC via Aktau exceed 1.5 million tonnes in the second half of 2026, the Caspian bridge is being built faster than expected. In that case near-term fragility would be overstated.