<h1>Block H Gas Project,Malaysia</h1>
<h2>Overview</h2>
<p>The Block H Gas Project is a deepwater offshore gas development located off Sabah,East Malaysia. Operated by PTTEP Sabah Oil,it involves participation from PTTEP,Petronas Carigali,and PT Pertamina Malaysia EP. Gas from fields in Block H is delivered to the PETRONAS Floating LNG Dua (PFLNG DUA) facility. Production started in 2021 from the Rotan and Buluh deepwater fields. The project supports Malaysia’s LNG and gas supply system and is part of PTTEP’s regional portfolio. Global Energy Monitor identifies the project as consisting of the Alum,Bemban,Buluh,Permai,and Rotan gas fields.</p>
<h2>Quick Facts</h2>
<table>
<colgroup><col/><col/></colgroup>
<tbody>
<tr><th>Item</th><th>Details</th></tr>
<tr><td>Project Name</td><td>Block H Gas Project</td></tr>
<tr><td>Country</td><td>Malaysia</td></tr>
<tr><td>Fuel Type</td><td>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>PTTEP Sabah Oil</td></tr>
<tr><td>Owner(s)</td><td>PTTEP Sabah Oil; Petronas Carigali Sdn Bhd; PT Pertamina Malaysia EP</td></tr>
<tr><td>Parent Company</td><td>Petroliam Nasional Bhd; PT Pertamina Malaysia EP; PTT PLC</td></tr>
<tr><td>Production Start Year</td><td>2021</td></tr>
<tr><td>Onshore/Offshore</td><td>Offshore</td></tr>
<tr><td>Block(s)</td><td>Block H</td></tr>
</tbody>
</table>
<h2>Location and Basin</h2>
<p>The project is located offshore Sabah,East Malaysia,in water depths greater than 1,100 meters. The basin is not clearly specified in available project-level sources. The block is part of Malaysia’s deepwater Sabah petroleum province.</p>
<h2>Ownership and Operatorship</h2>
<p>The project is operated by PTTEP Sabah Oil. Ownership is shared among PTTEP Sabah Oil,Petronas Carigali Sdn Bhd,and PT Pertamina Malaysia EP. Parent companies include PTT PLC (through PTTEP),Petroliam Nasional Bhd (through Petronas Carigali),and PT Pertamina Malaysia EP.</p>
<h2>Development History</h2>
<table>
<colgroup><col/><col/><col/></colgroup>
<tbody>
<tr><th>Milestone</th><th>Year or Date</th><th>Details</th></tr>
<tr><td>Development Milestone</td><td>2021</td><td>PTTEP and PETRONAS announced first gas production from the Rotan and Buluh deepwater fields in Block H.</td></tr>
<tr><td>Production Milestone</td><td>2021</td><td>First gas from the Rotan and Buluh fields was achieved in February 2021.</td></tr>
<tr><td>Recent Status Milestone</td><td>2024</td><td>The project is classified as operating and remains a producing offshore gas asset in Malaysia.</td></tr>
</tbody>
</table>
<p>PETRONAS confirmed first deepwater gas production from Block H on 6 February 2021. PTTEP announced the start-up of natural gas production from the Rotan and Buluh fields in February 2021. Natural Gas World reported that the project targeted production capacity of 270 million cubic feet per day,with gas delivered to PFLNG DUA. A single final investment decision year for the overall project is not clearly confirmed,possibly reflecting phased development. Expansion of Block H beyond the initial Rotan and Buluh fields was reported in 2025,covering the Alum,Bemban,and Permai deepwater fields.</p>
<h2>Infrastructure and Facilities</h2>
<p>The core infrastructure for the initial development includes deepwater production from the Rotan and Buluh fields and delivery of gas to the PFLNG DUA floating LNG facility. Recent expansion involves subsea infrastructure for the Alum,Bemban,and Permai fields. In September 2025,McDermott announced a deepwater subsea contract from PTTEP Malaysia for the Block H gas field expansion project,including new pipelines,umbilicals,risers,and flowlines to transport additional gas to PFLNG DUA.</p>
<h2>Production and Reserves</h2>
<p>Block H is an operating gas project with production start in 2021 from the Rotan and Buluh fields. Natural Gas World reported a target production capacity of 270 million cubic feet per day,with gas delivered to PFLNG DUA. Current reserves,field-by-field output,and actual production rates are not fully disclosed in available public sources. The project is interpreted to have operating production from Rotan and Buluh and planned or ongoing expansion involving Alum,Bemban,and Permai.</p>
<h2>Recent Developments</h2>
<p>In September 2025,McDermott announced a deepwater subsea contract from PTTEP Malaysia for the Block H gas field expansion project,which covers the Alum,Bemban,and Permai deepwater fields. Upstream Online reported in August 2025 that the expansion is referred to as Phase 1B and follows the February 2021 start-up of Rotan and Buluh via the 1.5 million tonnes per annum PFLNG DUA vessel.</p>
<h2>Related Topics</h2>
<ul>
<li>PTTEP Sabah Oil</li>
<li>Petronas Carigali</li>
<li>PT Pertamina Malaysia EP</li>
<li>Sabah deepwater gas development</li>
<li>Rotan Gas Field</li>
<li>Buluh Gas Field</li>
<li>Alum Gas Field</li>
<li>Bemban Gas Field</li>
<li>Permai Gas Field</li>
<li>PFLNG DUA</li>
<li>Floating LNG in Malaysia</li>
<li>Deepwater subsea gas development</li>
</ul>
<h2>Sources</h2>
<ul>
<li><a href="https://www.gem.wiki/Block_H_Gas_Project_%28Malaysia%29" rel="nofollow noopener" target="_blank">Global Energy Monitor,Block H Gas Project (Malaysia)</a></li>
<li><a href="https://www.pttep.com/en/newsroom/press-releases/323/pttep-achieves-first-gas-from-block-h-offshore-malaysia" rel="nofollow noopener" target="_blank">PTTEP,PTTEP Achieves First Gas from Block H Offshore Malaysia</a></li>
<li><a href="https://www.petronas.com/mpm/media/media-releases/first-deepwater-gas-production-block-h-offshore-malaysia-augments-malaysias" rel="nofollow noopener" target="_blank">PETRONAS Malaysia Petroleum Management,First Deepwater Gas Production from Block H Offshore Malaysia</a></li>
<li><a href="https://www.petronas.com/media/media-releases/first-deepwater-gas-production-block-h-offshore-malaysia-augments-malaysias" rel="nofollow noopener" target="_blank">PETRONAS,First Deepwater Gas Production from Block H Offshore Malaysia Augments Malaysia’s Investment Potential</a></li>
<li><a href="https://www.naturalgasworld.com/pttep-achieves-1st-gas-from-block-h-off-malaysia-85591" rel="nofollow noopener" target="_blank">Natural Gas World,PTTEP Achieves First Gas from Block H Offshore Malaysia</a></li>
<li><a href="https://www.mcdermott.com/press-release-detail/123055/mcdermott-awarded-deepwater-subsea-contract-pttep-malaysia" rel="nofollow noopener" target="_blank">McDermott,McDermott Awarded Deepwater Subsea Contract by PTTEP Malaysia</a></li>
<li><a href="https://www.offshore-energy.biz/large-subsea-contract-lands-on-mcdermotts-desk-for-gas-field-expansion-in-malaysia/" rel="nofollow noopener" target="_blank">Offshore Energy,Large Subsea Contract Lands on McDermott’s Desk for Gas Field Expansion in Malaysia</a></li>
<li><a href="https://www.oedigital.com/news/529777-pttep-hires-mcdermott-for-deepwater-subsea-job-off-malaysia" rel="nofollow noopener" target="_blank">Offshore Engineer,PTTEP Hires McDermott for Deepwater Subsea Job Offshore Malaysia</a></li>
<li><a href="https://pgjonline.com/news/2025/september/mcdermott-to-build-subsea-pipeline-for-malaysia-s-block-h-gas-expansion" rel="nofollow noopener" target="_blank">Pipeline &amp; Gas Journal,McDermott to Build Subsea Pipeline for Malaysia’s Block H Gas Expansion</a></li>
<li><a href="https://www.upstreamonline.com/field-development/operator-poised-to-award-prized-subsea-deals-for-strategic-malaysian-deepwater-gas-asset/2-1-1858656" rel="nofollow noopener" target="_blank">Upstream,Operator Poised to Award Subsea Deals for Strategic Malaysian Deepwater Gas Asset</a></li>
</ul>

IEPTC reference profile for Block H Gas in Malaysia,covering asset type,location,development status,and upstream industry context.

Block H Gas Project,Malaysia

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Block H Gas Project,Malaysia

Block H Gas Project,Malaysia

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