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Facies and Sequence Stratigraphy Analyses of Klasaman Formation in the “X Well”, Northern Salawati Basin, Papua, Indonesia

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Open Journal of Geology 2018年第5期8卷 499-513页

作者： Ovinda Edy Sunardi Ahmad Helman Hamdani Muhammad Burhannudinnur Afriadhi Triwerdhana Faculty of Geological Engineering Universitas Padjadjaran Bandung Indonesia Faculty of Earth Technology and Energy Universitas Trisakti Jakarta Indonesia kti exploration pertamina ep Jakarta Indonesia

The “X Well” is located in the Salawati Basin which is part of Western Papua. The interval of study is the Klasaman Formation that is characterized by thick sediment intercalated sandstones and shales. The movement of Sorong Fault strongly controlled the sedimentation of this formation. This study is very important to give a contribution for developing exploration prospect by predicting reservoir distribution since localized facies change may mark the distribution of sandstones. The current study aims: 1) to define the age of Klasaman Formation;2) to define the vertical facies;3) to define the sequence stratigraphy;and 4) to predict the lateral change of facies. Five nannofossil datum planes are found throughout the interval and cover the age Late Miocene to Early Pliocene. LO Sphenolithus abies points the age 3.65 Ma, LO Reticulofenestra pseudoumbilicus points the age 3.79 Ma, FO Pseudoemiliania lacunosa points the age 4 Ma, LO Discoaster quinqueramus and LO Discoaster berrgrenii point the age 5.59 Ma and Top of small Reticulofenestra Interval points the age 7.167 Ma. They define the NN11 up to NN16 Martini’s zonation. The age of Klasaman Formation is known as the uppermost Late Miocene to the Early Pliocene. Four facies can be identified, namely Upper Shoreface, Lower Shoreface, Offshore Transition and Offshore. The upper shoreface facies is characterized by thick and clean sandstones, about 2.41 - 20.64 meters thick, while the lower shoreface facies consists of predominantly very fine to fine-grained sandstones intercalated by siltstones and claystones. The offshore transition facies is marked by thick claystones and siltstones intercalated with thin sandstones, whilst the offshore facies is marked by thick laminated claystones. Nine Parasequences 4th order can be identified within study interval, namely Progradational Parasequence-1 to 2, Retrogradational Parasequence-3, Progradational Parasequence-4 to 6, Retrogradational Parasequence-7 to 9. They are bounded by Sequence Boundary-1 to 8. The upper shoreface

关键词： Salawati Basin Nannofossil Age Facies Sequence Stratigraphy and Sorong Fault

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苏门答腊斜向俯冲系统中前弧高地和盆地的发育

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石油勘探与开发 2021年第3期48卷 586-594页

作者： MUkti Maruf M MAULIN Hade B PERMANA Haryadi 印度尼西亚科学院地球技术学系万隆40135印度尼西亚 pertamina Hulu Energi Ogan Komering有限公司雅加达12520印度尼西亚

通过对苏门答腊弧前斜向俯冲系统构造变形作用进行分析,对苏门答腊斜向俯冲系统中弧前高地的隆起机制和弧前盆地的形成进行分析。研究表明,苏门答腊弧前高地的发育归因于以下过程:挠曲抬升,盆地倒转,较老增生楔形隆起以及增生楔向陆边... 详细信息

通过对苏门答腊弧前斜向俯冲系统构造变形作用进行分析,对苏门答腊斜向俯冲系统中弧前高地的隆起机制和弧前盆地的形成进行分析。研究表明,苏门答腊弧前高地的发育归因于以下过程:挠曲抬升,盆地倒转,较老增生楔形隆起以及增生楔向陆边缘的反冲。最新的地震反射资料表明,向沟槽发散的逆冲断层和向弧发散的逆冲断层之间的相互作用在弧前高地隆起过程中起到了重要作用,弧前高地隆起的沉积物是先前在弧前盆地中形成的;弧前高地和弧前盆地的现今形态与上新世增生楔和上覆弧前盆地沉积物的隆升有关。不论俯冲系统的倾斜度是多少,苏门答腊弧前区域都以挤压作用为主,这在形成新近纪平行于沟槽的盆地沉积中心起着重要作用。

关键词：斜向俯冲应变分解作用弧前逆冲断层走滑断层

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Structural Model of Kendeng Basin: A New Concept of Oil and Gas exploration

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Open Journal of Yangtze Oil and Gas 2020年第4期5卷 200-215页

作者： Ardian Novianto Sutanto Suharsono Carolus Prasetyadi Tavip Setiawan Geological Engineering Department UPN “Veteran” Yogyakarta Yogyakarta Indonesia Geophysics Engineering Department UPN “Veteran” Yogyakarta Yogyakarta Indonesia Research & Technology Center (RTC) pertamina Yogyakarta Indonesia

Kendeng Basin stretches in an E-W direction from the Quaternary Merapi-Ungaran Volcano range in the West to the Madura Strait East of Jawa Timur Province, Indonesia. With Quaternary volcanic deposits covering this basin, its subsurface configuration has not been accurately identified. Several scholars suggest that its configuration forms an asymmetrical basin deepening to the south as a result of volcanic deposits and extending E-W direction. This paper answers what configuration Kendeng Basin has, including whether it consists of a simple asymmetrical shape as previous studies have interpreted or other patterns due to tectonic processes that took place during its formation. The research employed Gravity and Magnetic method, and the results were processed by spectral and gradient analyses. Both analyses revealed that Kendeng Basin formed Horst-Graben structures extending in an E-W direction based on a response to compression and strain forces during its formation. A structure with an E-W direction controls the shape of the Horst-Graben and is transected by a structural pattern extending in a NE-SW direction or known as the Meratus pattern. These findings provide an alternative to the concept of oil and gas exploration, which, until today, is merely known from the emergence of oil seepages in Kendeng Basin.

关键词： Kendeng Basin Structure Gravity-Magnetic

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