The Neogene Deformation, Unconformity Surfaces and Uplift Features in Delta Tectonics, Tarakan Sub-Basin

Maulin, Hade B.; Sapiie, Benyamin; Gunawan, Indra

doi:10.29118/ipa19.g.191

Cited by 3 publications

(5 citation statements)

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“…1). Wells in this proximal area reveal also overpressure conditions within the Middle-Late Miocene sequences (Putra et al, 2017;Maulin et al, 2019). Previous studies identified that the shelf-edge contains a range of basinward-and landward-dipping extensional and/or inverted growth faults, and is situated at the southern tip of the Bunyu Arch (e.g.…”

Section: Geological Settingmentioning

confidence: 80%

“…We focus on the shelf‐edge to upper slope of the Tarakan Basin, where at least five different onshore‐river systems supplied sediment to the offshore basin (Figure 1). Wells in this proximal area reveal also overpressure conditions within the Middle‐Late Miocene sequences (Maulin et al, 2019; Putra et al, 2017). Previous studies identified that the shelf‐edge contains a range of basinward‐ and landward‐dipping extensional and/or inverted growth faults, and is situated at the southern tip of the Bunyu Arch (e.g.…”

Section: Geological Settingmentioning

confidence: 82%

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Extensional deformation of a shale‐dominated delta: Tarakan Basin, offshore Indonesia

2023

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Deformation on shale-rich continental margins is commonly associated with thin-skinned extension above mobile shales. Normal faulting and shale mobilization are widespread on such margins, being associated with and controlled by progradation and gravitational failure of deltaic sedimentary wedges. However, due to uncertainties in seismically imaging mobile shales, our understanding of problems like how base mobile-shale controls deformation, and the shape, size, and distribution of shale structures remain poorly understood. We here use 3D seismic reflection data from the platform region of the Tarakan Basin, offshore eastern Indonesia to investigate the temporal and spatial evolution of thin-skinned deformation of the Neogene sedimentary section.Our detailed seismic interpretation reveals up to 74 km long, concave-and convex-into-the-basin normal faults, dipping both basinward (eastwards) and locally landward (westwards), which detach downwards on a basal mobile shale (Early-Middle Miocene). The base of the mobile shale unit dips gently (< 17 o ) seaward, although older (Eocene-Early Miocene), rift-related normal faults originate local structural highs deforming the base of mobile shales. Our isochore (thickness map) analysis shows that supra-shale normal faulting commenced in the Middle Miocene and was accompanied by the formation of hanging-wall rollover folds and associated crestal grabens, with the subsequent along-and across strike migration of the deformation related to the nucleation, lateral linkage, and reactivation of individual fault systems. Updip growth normal faulting was also accompanied by the downslope flow of mobile shale, accompanied by parallel and perpendicular variations of the differential loading in the delta system, and local contraction and mobile shale-upbuilding, resulting in the growth of large, margin-parallel shale anticlines further downdip. The growth faults and anticlines are locally overlain by up to 5 km tall of mud pipes and volcanoes. We suggest that variations in the rate of sedimentary loading, mobile shale flow, fault growth, and gravitational failure of the delta system above a seaward-dipping, but locally rugose base mobile-shale surface, controlled Neogene deformation in the Tarakan Basin. We also demonstrate how variations in the trend and dip of the base mobile-shale surface influences the position, timing of formation, and evolution of supra-shale normal faults and their associated depocenters along shale-rich, deltaic margins.

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Section: Geological Settingmentioning

confidence: 80%

Section: Geological Settingmentioning

confidence: 82%

Extensional deformation of a shale‐dominated delta: Tarakan Basin, offshore Indonesia

2023

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“…Lapangan WB adalah lapangan gas di dalam sub-cekungan Tarakan. Dari analisis data core dan side wall core, reservoir Lapangan WB diidentifikasi sebagai batupasir yang diendapkan pada lingkungan pengendapan delta [1]. Low frequency shadow zone yang terkait dengan keberadaan hidrokarbon terutama gas, memberikan informasi yang berguna untuk karakterisasi reservoir.…”

Section: Pendahuluanunclassified

Dekomposisi Spektral Berdasarkan Transformasi Wavelet Kontinyu Untuk Pemetaan Batupasir Gas Di Formasi Tarakan, Studi Kasus Cekungan Tarakan – Kalimantan Utara

Oktavianti¹,

Haris²,

Riyanto³

et al. 2020

Prosiding Seminar Nasional Fisika (E-Journal) snf2016 Unj

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GAMBAR 1. Hasil CWT dari satu tras seismik yang diekstrak pada lokasi sumur menggunakan (a) wavelet induk bertipe Morlet (b) wavelet induk bertipe Ricker. KESIMPULAN Untuk reservoir tipis seperti yang diendapkan pada lingkungan pengendapan delta, wavelet tipe Ricker cocok digunakan sebagai wavelet induk pada proses Transformasi Wavelet Kontinyu dibandingkan wavelet Morlet. UCAPAN TERIMAKASIH Penulis bermaksud untuk menyampaikan terima kasih kepada Pertamina Hulu Energi Nunukan Company dan Universitas Indonesia untuk menyediakan data dan dukungan pada penelitian ini.

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“…The Great Tarakan Basin is divided into two parts. The Tarakan, Malinau, and Tidung sub-basins are located in the north, while the Berau and Muara sub-basins are situated in the southern area (see Figure 1) (Maulin et al, 2019). Geometry and bathymetry in the northern sub-basin zone are deeper to the Celebes Sea, indicating that sedimentation is moving deeper eastward (Tiranda and Hall, 2021).…”

Section: Introductionmentioning

confidence: 98%

“…Most of the outcrops in the northern sub-basin Tarakan and Tidung are dominated by Neogene-Quaternary deposits, while Mesozoic-Paleogene outcrops are limited. The presence of Neogene tectonically activated deltas indicates that the development of sedimentary and basins in the northern region is controlled by uplift followed by erosion and rapid sedimentation (Hidayati et al, 2007;Morley et al, 2017;Maulin et al, 2019). In the southern area lithological units of Mesozoic to Quaternary age can be found.…”

Section: Introductionmentioning

confidence: 99%

Mesozoic-Cenozoic Stratigraphy and Tectonic Development of the Southern Great Tarakan Basin, Northeast Borneo, Indonesia

Krisnabudhi

Sapiie

Riyanto³

et al. 2022

MGPB

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We analyzed the tectonics and stratigraphy of the Southern Great Tarakan Basin to determine its tectonic evolution during the Mesozoic-Cenozoic Eras, the evolution of basin geometry, and the potential of hydrocarbon using integrated surface and subsurface data. Southern Great Tarakan Basin can be divided into three sub-basins, Berau, Muara, and South Tarakan. They comprise deposits of Jurassic to Quaternary age, which can be assigned five mega sequences based on their lithological characteristics and tectonic development. We divide the tectonic events into four main phases; (1) contractional Jurassic-Cretaceous, (2) extensional Paleogene, (3) subsidence Early Neogene, and (4) contractional Late Neogene. The development of the strike-slip activity influenced the geometric evolution of the two sub-basins. NW-SE transpressional structures formed during the contraction phase caused most of the existing structure in Paleogene reactivated and inverted, followed by basement uplift and erosion. Consequently, the evolution of the transpressional system caused The Great Tarakan Basin to be divided into five sub-basins during the Late Miocene-Pliocene. Moreover, five horizons with hydrocarbon potential exist in the southern part of The Greater Tarakan Basin; three plays in the Berau Sub-basin, and two main plays in the Muara Sub-basin. The Late Neogene structures in the Berau Sub-basin control the accumulation, migration, and trapping mechanism, whereas these structures do not exist in Muara; hence, this sub-basin is dominated by stratigraphic traps.

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The Neogene Deformation, Unconformity Surfaces and Uplift Features in Delta Tectonics, Tarakan Sub-Basin

Cited by 3 publications

References 0 publications

Extensional deformation of a shale‐dominated delta: Tarakan Basin, offshore Indonesia

Extensional deformation of a shale‐dominated delta: Tarakan Basin, offshore Indonesia

Dekomposisi Spektral Berdasarkan Transformasi Wavelet Kontinyu Untuk Pemetaan Batupasir Gas Di Formasi Tarakan, Studi Kasus Cekungan Tarakan – Kalimantan Utara

Mesozoic-Cenozoic Stratigraphy and Tectonic Development of the Southern Great Tarakan Basin, Northeast Borneo, Indonesia

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