Methane hydrate systems off South Makassar Basin, Indonesia
Abstract Previous drilling and coring efforts have confirmed the presence of methane hydrates in the deepwater Makassar Strait of Indonesia. The strait, separated into the North Makassar Basin and South Makassar Basin, is situated on the thinned Eurasian continental crust that began to rift during t...
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SpringerOpen
2025-02-01
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| Series: | Geoscience Letters |
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| Online Access: | https://doi.org/10.1186/s40562-025-00374-w |
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| author | Feisal Dirgantara Susilohadi Susilohadi Mohammad Andri Syahrir Iskandar Yudha Arisandhy Sintuwardhana |
| author_facet | Feisal Dirgantara Susilohadi Susilohadi Mohammad Andri Syahrir Iskandar Yudha Arisandhy Sintuwardhana |
| author_sort | Feisal Dirgantara |
| collection | DOAJ |
| description | Abstract Previous drilling and coring efforts have confirmed the presence of methane hydrates in the deepwater Makassar Strait of Indonesia. The strait, separated into the North Makassar Basin and South Makassar Basin, is situated on the thinned Eurasian continental crust that began to rift during the Middle Eocene. While past methane hydrates studies have focused on the northern basin, the southern region lacks equivalent investigation. This research employs legacy multi-channel seismic reflection and well logs data to decipher the methane hydrate systems and associated free methane in the South Makassar Basin. Identified through the interpretation of bottom simulating reflectors (BSRs), seafloor topography, and structural features on seismic reflection profiles are five primary play types: polygonal faults type, slope type, buried fold type, buried carbonate mound type, and sediment waves type. The distinctive characteristics of BSRs in this region can be summarized as follows: (1) predominantly located beneath topographic highs and basin depocenter, (2) typically displaying a series of high-amplitude dipping reflectors beneath BSRs, (3) the distribution of BSRs is not always continuous and is not always parallel to that of the seafloor, and (4) the presence of blanking reflection above BSRs is variable. These features suggest methane hydrate accumulation preferentially occurs beneath structural highs and in basin depocenters, likely due to the upward and lateral migration of buoyant, methane-rich fluids. Through the analysis of seismic amplitude distribution and reflection strength in relation to BSR depth, hydrocarbon distribution is categorized into methane-hydrate reservoirs above BSRs and free methane reservoirs below BSRs. A first-order estimation of methane resources via petrophysical approach and Monte Carlo simulation suggests approximately 105 trillion cubic feet (TCF) of methane resources. |
| format | Article |
| id | doaj-art-81e9010f446e4d5a94a8f23b4fcb58b0 |
| institution | Kabale University |
| issn | 2196-4092 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Geoscience Letters |
| spelling | doaj-art-81e9010f446e4d5a94a8f23b4fcb58b02025-02-09T12:40:03ZengSpringerOpenGeoscience Letters2196-40922025-02-0112112310.1186/s40562-025-00374-wMethane hydrate systems off South Makassar Basin, IndonesiaFeisal Dirgantara0Susilohadi Susilohadi1Mohammad Andri Syahrir Iskandar2Yudha Arisandhy Sintuwardhana3Research Center for Geological Resources, National Research and Innovation Agency of IndonesiaResearch Center for Geological Resources, National Research and Innovation Agency of IndonesiaMarine Geological Institute of IndonesiaGeophysics Program, Physics Department, Gadjah Mada UniversityAbstract Previous drilling and coring efforts have confirmed the presence of methane hydrates in the deepwater Makassar Strait of Indonesia. The strait, separated into the North Makassar Basin and South Makassar Basin, is situated on the thinned Eurasian continental crust that began to rift during the Middle Eocene. While past methane hydrates studies have focused on the northern basin, the southern region lacks equivalent investigation. This research employs legacy multi-channel seismic reflection and well logs data to decipher the methane hydrate systems and associated free methane in the South Makassar Basin. Identified through the interpretation of bottom simulating reflectors (BSRs), seafloor topography, and structural features on seismic reflection profiles are five primary play types: polygonal faults type, slope type, buried fold type, buried carbonate mound type, and sediment waves type. The distinctive characteristics of BSRs in this region can be summarized as follows: (1) predominantly located beneath topographic highs and basin depocenter, (2) typically displaying a series of high-amplitude dipping reflectors beneath BSRs, (3) the distribution of BSRs is not always continuous and is not always parallel to that of the seafloor, and (4) the presence of blanking reflection above BSRs is variable. These features suggest methane hydrate accumulation preferentially occurs beneath structural highs and in basin depocenters, likely due to the upward and lateral migration of buoyant, methane-rich fluids. Through the analysis of seismic amplitude distribution and reflection strength in relation to BSR depth, hydrocarbon distribution is categorized into methane-hydrate reservoirs above BSRs and free methane reservoirs below BSRs. A first-order estimation of methane resources via petrophysical approach and Monte Carlo simulation suggests approximately 105 trillion cubic feet (TCF) of methane resources.https://doi.org/10.1186/s40562-025-00374-wMethane hydratesFree methaneBottom-simulating reflectorsPlay typesVolumetric estimationSouth Makassar Basin |
| spellingShingle | Feisal Dirgantara Susilohadi Susilohadi Mohammad Andri Syahrir Iskandar Yudha Arisandhy Sintuwardhana Methane hydrate systems off South Makassar Basin, Indonesia Geoscience Letters Methane hydrates Free methane Bottom-simulating reflectors Play types Volumetric estimation South Makassar Basin |
| title | Methane hydrate systems off South Makassar Basin, Indonesia |
| title_full | Methane hydrate systems off South Makassar Basin, Indonesia |
| title_fullStr | Methane hydrate systems off South Makassar Basin, Indonesia |
| title_full_unstemmed | Methane hydrate systems off South Makassar Basin, Indonesia |
| title_short | Methane hydrate systems off South Makassar Basin, Indonesia |
| title_sort | methane hydrate systems off south makassar basin indonesia |
| topic | Methane hydrates Free methane Bottom-simulating reflectors Play types Volumetric estimation South Makassar Basin |
| url | https://doi.org/10.1186/s40562-025-00374-w |
| work_keys_str_mv | AT feisaldirgantara methanehydratesystemsoffsouthmakassarbasinindonesia AT susilohadisusilohadi methanehydratesystemsoffsouthmakassarbasinindonesia AT mohammadandrisyahririskandar methanehydratesystemsoffsouthmakassarbasinindonesia AT yudhaarisandhysintuwardhana methanehydratesystemsoffsouthmakassarbasinindonesia |