Tertiary basins of West Kalimantan, associated igneous activity and structural setting

Williams, Paul R.; Supriatna, S.; Trail, Dustin; Heryanto, Rachmat

doi:10.29118/ipa.100.151.160

Cited by 3 publications

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“…The Melawi and Mandai Basins of west central Kalimantan are separated by the Semitau Ridge, a northwest striking feature which shows up well on surface geologic maps and landsat data. The Melawi Basin is filled with late Cretaceous and Palaeogenemarine to parallic sediments (Van Bemmelen, 1970, Williams et al. 1984 however their distribution and provenance is presently only poorly defined.…”

Section: '"mentioning

confidence: 99%

“…The structural history of these basins is even less well known than the stratigraphy. A pre late Eocene folding event has affected the Melawi Basin sediments and a strong, possibly early Miocene, event has been recorded for the Semitau Ridge (Williams et al .. 1984). Van Bemmelen (1970) suggests an initial folding event in the late Cretaceous, a second event at the end of the Palaeogene which affected both basins and a final Neogene event affecting predominantly the Mandai Basin.…”

Section: '"mentioning

confidence: 99%

“…Van Bemmelen (1970) suggests an initial folding event in the late Cretaceous, a second event at the end of the Palaeogene which affected both basins and a final Neogene event affecting predominantly the Mandai Basin. The uplifted Semitau Ridge has been described as overthrust to the Southwest (Williams et al. 1984) and to the Northeast (Van Bemmelen, 1970) resembling a large scale, bilaterally symmetrical flower structure suggesting an origin in an area of transpression along a major stikeslip fault zone.…”

Section: '"mentioning

confidence: 99%

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The mechanics of progressive deformation in crustal plates - a working model for S.E. Asia

Wood¹

1985

BGSM

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confidence: 99%

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The mechanics of progressive deformation in crustal plates - a working model for S.E. Asia

Wood¹

1985

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“…Pre-Tertiary tectonic activities created uplifting of Semitau Complex and Boyan Melange Complex separating the Ketungau and Melawi Basin (Williams et al, 1984). Nevertheless, Halls and Nichols (2002) suggest that the Ketungau and Melawi Basins are not conventional foreland basin formed by loading of thrust sheets, indicated by the absence of thin skinned thrusting in the highly eroded areas.…”

Section: General Geological Settingmentioning

confidence: 99%

“…Tectonically, the Ketungau and Melawi Basins can be classified as intramontane basins. The Ketungau and Melawi basins are separated from each other by a belt of deep-water rocks and a belt of melange (Boyan Melange; Williams et al, 1984). On the northern margin, the Ketungau Basin is also bounded by the Lubok Antu Melange (Tan, 1982).…”

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confidence: 99%

The Potential of Ketungau and Silat Shales in Ketungau and Melawi Basins, West Kalimantan: For Oil Shale and Shale Gas Exploration

Santy¹,

Panggabean²

2013

Indonesian J. Geosci.

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The Ketungau and Melawi Basins, in West Kalimantan, are Tertiary intramontane basins of which the potential for economic conventional oil and gas discoveries have not previously been confirmed. The Ketungau Basin is bordered by the Melawi Basin in the south. Besides non-ideal trapping mechanisms, another major problem in these basins is source rock maturation. Nevertheless, both basins are promising to be explored for oil shale and shale gas energy resources. Therefore, the aim of this paper is to give some perspectives on their source rocks, as an input for the evaluation of the potential of unconventional oil and gas. About twenty samples collected from the Ketungau and Melawi Basins were analyzed using pyrolysis and organic petrographic methods. The results show a poor to good quality of source rock potential. The Ketungau shale, which is the main source rock in the Ketungau Basin, is dominated by type III, immature, and gas prone kerogen. The Silat shale, which is the main source rock in the Melawi Basin, is dominated by type II, immature to early mature, mixed gas, and oil prone kerogen. In the field, Ketungau and Silat Formations have a widespread distribution, and are typically 900 m to 1000 m thick. Both the Ketungau and Silat shales occur within synclinal structures, which have a poor trapping mechanism for conventional oil or gas targets, but are suitable for oil shale and shale gas exploration. This early stage of research clearly shows good potential for the future development of unconventional energy within the Ketungau and Melawi Basins. Keywords

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The Potential of Ketungau and Silat Shales in Ketungau and Melawi Basins, West Kalimantan: For Oil Shale and Shale Gas Exploration

Santy

Panggabean

2013

Indonesian J. Geosci.

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DOI: 10.17014/ijog.v8i1.154The Ketungau and Melawi Basins, in West Kalimantan, are Tertiary intramontane basins of which the potential for economic conventional oil and gas discoveries have not previously been confirmed. The Ketungau Basin is bordered by the Melawi Basin in the south. Besides non-ideal trapping mechanisms, another major problem in these basins is source rock maturation. Nevertheless, both basins are promising to be explored for oil shale and shale gas energy resources. Therefore, the aim of this paper is to give some perspectives on their source rocks, as an input for the evaluation of the potential of unconventional oil and gas. About twenty samples collected from the Ketungau and Melawi Basins were analyzed using pyrolysis and organic petrographic methods. The results show a poor to good quality of source rock potential. The Ketungau shale, which is the main source rock in the Ketungau Basin, is dominated by type III, immature, and gas prone kerogen. The Silat shale, which is the main source rock in the Melawi Basin, is dominated by type II, immature to early mature, mixed gas, and oil prone kerogen. In the field, Ketungau and Silat Formations have a widespread distribution, and are typically 900 m to 1000 m thick. Both the Ketungau and Silat shales occur within synclinal structures, which have a poor trapping mechanism for conventional oil or gas targets, but are suitable for oil shale and shale gas exploration. This early stage of research clearly shows good potential for the future development of unconventional energy within the Ketungau and Melawi Basins.

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Tertiary basins of West Kalimantan, associated igneous activity and structural setting

Cited by 3 publications

References 0 publications

The mechanics of progressive deformation in crustal plates - a working model for S.E. Asia

The mechanics of progressive deformation in crustal plates - a working model for S.E. Asia

The Potential of Ketungau and Silat Shales in Ketungau and Melawi Basins, West Kalimantan: For Oil Shale and Shale Gas Exploration

The Potential of Ketungau and Silat Shales in Ketungau and Melawi Basins, West Kalimantan: For Oil Shale and Shale Gas Exploration

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