<h1>Cusiana Oil and Gas Project,Casanare,Colombia</h1>
<p>Cusiana Oil and Gas Project is an operating onshore oil and gas project in Casanare,Colombia. The project is operated and wholly owned by Ecopetrol SA. It covers the Río Chitamena and Tauramena areas in the Llanos foothills of eastern Colombia. Discovered in 1989,it was a major conventional discovery that helped Colombia achieve oil self-sufficiency in the 1990s.</p>
<h2>Quick Facts</h2>
<table>
<tbody>
<tr><th>Item</th><th>Details</th></tr>
<tr><td>Project Name</td><td>Cusiana Oil and Gas Project</td></tr>
<tr><td>Country</td><td>Colombia</td></tr>
<tr><td>Subnational Unit</td><td>Casanare</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>2024</td></tr>
<tr><td>Operator</td><td>Ecopetrol</td></tr>
<tr><td>Owner(s)</td><td>Ecopetrol SA [100%]</td></tr>
<tr><td>Parent Company</td><td>Ecopetrol SA [100%]</td></tr>
<tr><td>Discovery Year</td><td>1989</td></tr>
<tr><td>Onshore/Offshore</td><td>Onshore</td></tr>
<tr><td>Block(s)</td><td>Río Chitamena; Tauramena</td></tr>
</tbody>
</table>
<h2>Location</h2>
<p>The project is onshore in the Casanare department of Colombia,in the Llanos foothills region about 240 km northeast of Bogotá. Published geological literature describes Cusiana as located in a structurally complex fold-thrust belt setting with multiple stacked sandstone reservoirs in the Eocene Mirador,Paleocene Barco,and Cretaceous Guadalupe formations.</p>
<h2>Operator and Ownership</h2>
<p>Ecopetrol operates the project and holds 100% ownership through its subsidiary Ecopetrol SA. The field was originally discovered and developed with the involvement of BP in the 1990s. In 2016,Ecopetrol ended its contract with Equión Energía and assumed direct operation.</p>
<h2>Development History</h2>
<p>The field was discovered in 1989. Development proceeded during the 1990s,but a specific final investment decision date and production start year are not confirmed in project-level data. The project was operating as of 2024.</p>
<h2>Production and Reserves</h2>
<p>Historical estimates reported potential recoverable volumes of up to 1.5 billion barrels of crude oil and condensate (OSTI,1993). Current project-level production rates are not publicly confirmed. Cusiana also produces natural gas and is part of the Llanos foothills gas system,but gas output figures for the project alone are not separately reported.</p>
<h2>Recent Developments</h2>
<p>The project remained operating in 2024. Broader Colombian gas-market discussions (Reuters,2025) cite the importance of domestic fields including Cusiana,but no project-specific new drilling campaign,facility expansion,or ownership change has been announced.</p>
<h2>Related Topics</h2>
<ul>
<li>Colombia oil and gas production</li>
<li>Casanare upstream projects</li>
<li>Llanos foothills petroleum geology</li>
<li>Cusiana and Cupiagua fields</li>
<li>Ecopetrol upstream operations</li>
<li>Conventional oil and gas field development</li>
<li>Mature field production optimization</li>
<li>Gas supply in Colombia</li>
<li>Onshore oil and gas asset integrity</li>
<li>Reservoir management in fold-thrust belt settings</li>
</ul>
<h2>Sources</h2>
<ul>
<li><a href="https://www.gem.wiki/Cusiana_Oil_and_Gas_Project_(Casanare,_Colombia)" rel="nofollow noopener" target="_blank">Global Energy Monitor,Cusiana Oil and Gas Project</a></li>
<li><a href="https://www.gem.wiki/Cusiana_%28Tauramena%29_Oil_and_Gas_Field_%28Casanare%2C_Colombia%29" rel="nofollow noopener" target="_blank">Global Energy Monitor,Cusiana Tauramena Oil and Gas Field</a></li>
<li><a href="https://www.ecopetrol.com.co/wps/portal/Home/en/Ourcompany/about-us/Our%20History" rel="nofollow noopener" target="_blank">Ecopetrol,Our History</a></li>
<li><a href="https://www.bnamericas.com/en/news/ecopetrol-going-it-alone-at-cusiana-field" rel="nofollow noopener" target="_blank">BNamericas,Ecopetrol going it alone at Cusiana field</a></li>
<li><a href="https://pubs.geoscienceworld.org/aapg/aapgbull/article/79/10/1444/39082/Petroleum-Geology-of-the-Cusiana-Field-Llanos" rel="nofollow noopener" target="_blank">AAPG Bulletin,Petroleum Geology of the Cusiana Field,Llanos Basin</a></li>
<li><a href="https://archives.datapages.com/data/specpubs/memoir78/CHAPTER_5/CHAPTER_5.HTM" rel="nofollow noopener" target="_blank">AAPG Datapages,The Cusiana Field,Llanos Foothills,Colombia</a></li>
<li><a href="https://www.osti.gov/biblio/7191617" rel="nofollow noopener" target="_blank">OSTI,Cusiana reserves as much as 1.5 billion barrels</a></li>
<li><a href="https://www.reuters.com/business/energy/colombias-ecopetrol-warns-possible-natural-gas-shortage-community-roadblocks-2025-11-24/" rel="nofollow noopener" target="_blank">Reuters,Colombia gas supply context</a></li>
</ul>

IEPTC reference profile for Cusiana Oil and Gas Project,Casanare in Colombia,covering asset type,location,development status,and upstream industry context.

Cusiana Oil and Gas Project,Casanare,Colombia

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Cusiana Oil and Gas Project,Casanare,Colombia

Cusiana Oil and Gas Project,Casanare,Colombia

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