Across the region, governments are racing to modernize reservoir management as competition for long-term gas supply intensifies.
Azerbaijan is pressing ahead with multibillion-dollar pressure-enhancement projects to sustain output from mature fields, while Kazakhstan and Turkmenistan are expanding offshore production with foreign capital and advanced technology.
Western majors, international service firms and even Persian Gulf state companies are reshaping the Caspian’s energy map—locking in production and export capacity for decades.
Iran, by contrast, lacks both the equipment and the partners to participate. Its only seismic survey vessel in the Caspian was decommissioned nearly two decades ago, and its sole offshore drilling platform has remained inactive for years.
The result is not simply underinvestment, but effective exclusion: while neighbors upgrade offshore infrastructure and extend field life, Iran has been left on the sidelines.
Contrast: Azerbaijan
Nowhere is the contrast clearer than in Azerbaijan’s flagship Shah Deniz gas field.
Operated by a consortium led by Britain’s BP, the field has attracted more than $30 billion in investment and supplies gas to Georgia, Turkey and much of Europe.
With production from its active phases expected to decline in the coming decade, Azerbaijan has moved early, signing contracts worth nearly $3 billion for large-scale pressure-enhancement facilities designed to sustain output, cut emissions and unlock additional reserves.
“Eliminating pressure decline is now the central priority,” Elham Shaban, director of the Caspian Oil Studies Center in Azerbaijan, told Iran International, noting that further contracts with Western and domestic firms are expected to be finalized in the coming months.
Iran’s handicap
Iran faces a parallel challenge at home—without comparable tools to address it. South Pars, the giant gas field it shares with Qatar and which supplies roughly 70 percent of Iran’s domestic consumption, has begun to experience pressure decline.
While Qatar installed modern pressure-enhancement systems years ago with Western support and has since signed contracts worth nearly $30 billion to expand production and liquefaction capacity, Iran has turned to local contractors, signing agreements worth $17 billion for smaller platforms and less powerful compressors.
Funding for those projects, however, has yet to materialize. Iranian oil officials have warned that gas shortages this winter could reach a record 300 million cubic meters per day, underscoring the gap between technical need and execution.
The same pattern extends to Iran’s oil sector. Roughly 80 percent of Iran’s producing oil fields are in the second half of their lifespan, with annual decline rates estimated at 8 to 12 percent.
Limited access to advanced recovery technologies has left Iran with a recovery rate of about 24 percent—only marginally above its natural baseline.
Not even China
By comparison, Saudi Arabia has raised recovery rates above 50 percent through decades of cooperation with Western firms, while Azerbaijan extended the life of its Azeri-Chirag-Gunashli fields by signing a long-term redevelopment agreement with BP and its partners.
Elsewhere around the Caspian, foreign capital continues to flow. Kazakhstan has attracted tens of billions of dollars to develop the Kashagan field, the region’s largest, while Turkmenistan’s offshore sector is operated almost entirely by the UAE’s Dragon Oil.
Iran’s Arab neighbours Arab have also expanded into gas development and transport infrastructure, reinforcing a regional energy network from which Tehran remains largely absent, despite its close political ties with Moscow and Beijing.
China, Iran’s largest trading partner, made no direct investment in Iranian or Russian energy projects in the first half of this year, while channeling more than $20 billion into Kazakhstan and the Middle East under its Belt and Road Initiative.
For Iran, sanctions and technological isolation have turned the Caspian from a shared resource into a widening strategic divide.