<h1>Chayvo Oil and Gas Project,Russia</h1>
<p>Chayvo Oil and Gas Project is an operating onshore conventional oil and gas project in Russia,located on Sakhalin Island in the Okhotsk basin. The project is associated with the northern end of the Chayvo field license area and forms a major component of the wider Sakhalin-1 development,one of Russia’s most technically significant upstream projects. The field is known for extended-reach drilling from onshore and offshore facilities to access reservoirs beneath the Sea of Okhotsk.</p>
<h2>Quick Facts</h2>
<table>
<tbody>
<tr><th>Item</th><th>Details</th></tr>
<tr><td>Project Name</td><td>Chayvo Oil and Gas Project</td></tr>
<tr><td>Country</td><td>Russia</td></tr>
<tr><td>Fuel Type</td><td>Oil and gas</td></tr>
<tr><td>Production Type</td><td>Conventional</td></tr>
<tr><td>Status</td><td>Operating</td></tr>
<tr><td>Status Year</td><td>2023</td></tr>
<tr><td>Onshore/Offshore</td><td>Onshore</td></tr>
<tr><td>Basin</td><td>Okhotsk</td></tr>
<tr><td>Block(s)</td><td>Northern end of the Chayvo field license area</td></tr>
</tbody>
</table>
<h2>Location and Operating Area</h2>
<p>The project is located on Sakhalin Island in the Russian Far East,in the Okhotsk basin. The location is the northern end of the Chayvo field license area. The wider Sakhalin-1 project area extends along the north-eastern shelf of Sakhalin Island. The region presents a challenging operating environment with cold weather,seasonal ice conditions,and remote logistics.</p>
<h2>Operator and Ownership</h2>
<p>Current project-level operator and ownership information for Chayvo is not clearly confirmed. The wider Sakhalin-1 project historically involved Exxon Neftegas Limited as operator,with Rosneft affiliates,Japan’s Sakhalin Oil and Gas Development Co. (SODECO),and India’s ONGC Videsh as partners. After Russia’s invasion of Ukraine in 2022,ExxonMobil exited Sakhalin-1 and the project underwent major restructuring. Reuters reported in 2025 that a Russian decree could open a pathway for Exxon to reclaim a stake in Sakhalin-1 under certain conditions,though the outcome remained uncertain.</p>
<h2>Development History</h2>
<table>
<tbody>
<tr><th>Milestone</th><th>Year or Date</th><th>Details</th></tr>
<tr><td>Development Milestone</td><td>1996</td><td>The wider Sakhalin-1 production-sharing agreement was completed between the consortium,the Russian Federation,and the Sakhalin regional government.</td></tr>
<tr><td>Production Milestone</td><td>2005</td><td>Initial oil and natural gas production from Chayvo began in October 2005.</td></tr>
<tr><td>Recent Status Milestone</td><td>2023</td><td>The project is identified as operating; the wider Sakhalin-1 project continued to be affected by post-2022 ownership,sanctions,and production changes.</td></tr>
</tbody>
</table>
<p>The Sakhalin-1 production-sharing agreement was completed in 1996,creating the commercial framework for development of Chayvo,Odoptu,and Arkutun-Dagi. Chayvo was the first major field developed in the sequence,with production beginning in October 2005. By 2007,ExxonMobil reported that Sakhalin-1 had achieved its production goal of 250,000 barrels of oil per day and winter-season gas production of 140 million cubic feet per day,referring to the wider project rather than Chayvo alone.</p>
<p>Chayvo gained international recognition for extended-reach drilling. Rosneft reported in 2015 that the O-14 production well at Chayvo reached a measured depth of 13,500 m with a horizontal reach of 12,033 m. Other record-setting wells include the Z-44 Chayvo well. The Yastreb land rig was used to drill extended-reach wells from shore toward offshore reservoirs. The Chayvo Onshore Processing Facility and the Orlan drilling platform are part of the broader Sakhalin-1 infrastructure linked to the field.</p>
<h2>Production and Reserves</h2>
<p>The project is operating,but current Chayvo-only production and reserve figures are limited. The wider Sakhalin-1 project reported a production target of 250,000 barrels of oil per day in 2007. Available estimates for the entire Sakhalin-1 development cite approximately 2.3 billion barrels of oil and 17.1 trillion cubic feet of gas,but these are project-wide figures not allocated to Chayvo alone. Reuters reported that Sakhalin-1 oil and gas output declined in 2024 compared with 2023,with local authorities citing natural field ageing.</p>
<h2>Recent Developments</h2>
<p>Developments at Chayvo are tied to the wider Sakhalin-1 project and post-2022 restructuring. ExxonMobil announced in 2022 that it would discontinue operations at Sakhalin-1 after Russia’s invasion of Ukraine. The Russian government moved to transfer the project into a new Russian-controlled structure. Reuters reported that Russia allowed ONGC Videsh and SODECO to retain participation in Sakhalin-1,and that a 2025 decree could open a pathway for Exxon to reclaim a stake subject to certain conditions. Sakhalin-1 production declined in 2024,with natural field ageing cited as a factor.</p>
<h2>Sources</h2>
<ul>
<li><a href="https://www.gem.wiki/Chayvo_Oil_and_Gas_Project_%28Russia%29" rel="nofollow noopener" target="_blank">Global Energy Monitor,Chayvo Oil and Gas Project (Russia)</a></li>
<li><a href="https://www.gem.wiki/Chayvo_%28Sakhalin-1%29_Oil_and_Gas_Asset_%28Russia%29" rel="nofollow noopener" target="_blank">Global Energy Monitor,Chayvo (Sakhalin-1) Oil and Gas Asset (Russia)</a></li>
<li><a href="https://investor.exxonmobil.com/company-information/press-releases/detail/1120/sakhalin-1-project-production-goal-achieved" rel="nofollow noopener" target="_blank">ExxonMobil,Sakhalin-1 Project Production Goal Achieved</a></li>
<li><a href="https://www.rosneft.com/press/releases/item/174355/" rel="nofollow noopener" target="_blank">Rosneft,Sakhalin-1 Sets Another Extended Reach Drilling Record</a></li>
<li><a href="https://downloads.regulations.gov/NOAA-NMFS-2011-0248-0008/attachment_82.pdf" rel="nofollow noopener" target="_blank">Sakhalin-1 Project Fact Sheet,September 2011</a></li>
<li><a href="https://www.reuters.com/business/energy/russias-sakhalin-lng-oil-gas-output-down-2024-2025-03-04/" rel="nofollow noopener" target="_blank">Reuters,Russia’s Sakhalin LNG,oil and gas output down in 2024</a></li>
<li><a href="https://www.reuters.com/business/energy/energy-assets-affected-by-russia-west-standoff-sanctions-2025-03-27/" rel="nofollow noopener" target="_blank">Reuters,Energy assets affected by Russia-West standoff and sanctions</a></li>
<li><a href="https://www.reuters.com/business/energy/russia-decree-opens-door-exxon-return-sakhalin-1-project-2025-08-15/" rel="nofollow noopener" target="_blank">Reuters,Russia decree opens door for Exxon return to Sakhalin-1 project</a></li>
<li><a href="https://www.oilandgasiq.com/drilling-and-development/articles/z-44-chayvo-well-the-deepest-oil-extraction" rel="nofollow noopener" target="_blank">Oil &amp; Gas IQ,Z-44 Chayvo Well</a></li>
</ul>
<h2>Related Topics</h2>
<ul>
<li><p>Sakhalin-1 project</p></li>
<li><p>Chayvo field</p></li>
<li><p>Okhotsk basin</p></li>
<li><p>Sakhalin Island oil and gas</p></li>
<li><p>Extended-reach drilling</p></li>
<li><p>Yastreb drilling rig</p></li>
<li><p>Orlan platform</p></li>
<li><p>Exxon Neftegas</p></li>
<li><p>Rosneft</p></li>
<li><p>ONGC Videsh</p></li>
<li><p>SODECO</p></li>
<li><p>Russian Far East upstream production</p></li>
<li><p>Harsh-environment oil and gas operations</p></li>
<li><p>Sanctions risk in upstream projects</p></li>
</ul>

IEPTC reference profile for Chayvo Oil and Gas in Russia,covering asset type,location,development status,and upstream industry context.

Chayvo Oil and Gas Project,Russia

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Chayvo Oil and Gas Project,Russia

Chayvo Oil and Gas Project,Russia

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