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All Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Scientific Contribution Oil and Gas LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI
Eko Budi Lelono
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Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Energy Engineering Environmental Science

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Perkembangan Fasies Sedimen Formasi Mamberamo Berumur Miosen Akhir-Pliosen di Cekungan Papua Utara David Victor Mamengko; Yoga B.Sendjadja; Budi Mulyana; Hermes Panggabean; Iyan Haryanto; Eko Budi Lelono; Juwita Trivianty Musu; Panuju Panuju
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 1 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i1.399

Abstract

North Papua Basin is a fore arc basin located in northern coastal of Papua Island. This basin filled by Middle-Upper Miocene turbidite sediment and overlied by Upper Miocene – Quarternary clastic sediment. Upper Miocene – Quaternary clastic sediments (Mamberamo Formation) composed by interbedding conglomerate, sandstone and shale as molasses deposit. A detailed stratigraphic study was performed to identify facies and its association of the Mamberamo Formation to that give a new perspective on the characteristics and development of facies succession of Lower Mamberamo Formation. Result  shows that the Lower Mamberamo Formation consists of three facies: A) cross bedding sandstone (subtidal), B) heterolothic silty shale (intra-tidal), C) carbonaceous shale (supra-tidal) deposited on Late Miocen to Plio-Pleistocene during centra range orogeny (syn-orogeny) as molasses deposits.Keywords: Fore arc basin, North Papua Basin, Mamberamo Formation, molasse deposits.
The Migration Pathway Of Some Selected Australian Palynomorphs From Their Origin To Se Asia Eko Budi Lelono
Scientific Contributions Oil and Gas Vol. 35 No. 2 (2012): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.35.2.25

Abstract

This paper proposes the alternative dispersal route of Australian elements of Dacrydium and Casuarina from their origin to Southeast Asia. It was previously thought that these Australian affi nities migrated to Sunda region following the collision of the Australian and the Asian plates at the Oligo-Miocene boundary (Morley, 1998 and 2000). The subsequent study by Lelono (2007) extended the record of these two taxa from the Oligo-Miocene boundary to the base Oligocene. This is unlikely, since at the time of basal Oligocene, when these pollen types fi rst appear, the Australian land mass would have been some 1000 kms south of the East Java area. Therefore, this fact led Lelono (2007) to propose the earlier arrival of the Gondwanan fragment to this area in Early Oligocene. However, recent records of Dacrydium have been reported from the Early Eocene of the Ninety East Ridge (55 Ma) and the Indian subcontinent (50 Ma) (Morley, 2009). This implies to the alternative dispersal route of this pollen. It is possible that Dacrydium dispersed into SE Asia prior to the Early Oligocene via the Ninety East Ridge and the Indian plate, and subsequently its distribution across the Sunda region and Indochina was limited by palaeoclimate, explaining why it is present in some areas of the Sunda region, but not others. Mean while, a model to explain the dispersal of Casuarina remains unresolved, since migration via India is unlikely as there is no pollen record from the Indian subcontinent. Therefore, long distance dispersal may be a possibility for this pollen.
Oligocene Palynology Of On-Shore West Java Eko Budi Lelono
Scientific Contributions Oil and Gas Vol. 35 No. 2 (2012): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.35.2.27

Abstract

Compared to its counterpart in the off-shore area (including Northwest Java and Northeast Java), the Oligocene sediment of on-shore West Java provides low pollen assemblages. In addition, superwet elements of Dacrydium and Casuarina commonly occurred in off-shore area are less represented in the on-shore area. However, it is believed that the study area still experienced wet climate condition as proved by common occurrence of rattan pollen Dicolpopollis spp. indicating a thick growth of swamp forest under moist climate. Unlike its counterpart in the off-shore North West Java, the studied sediment rarely yields lacustrine elements suggesting the disappearance of lake deposit. The Oligocene sediment of on-shore West Java is defi ned by the regular appearance of Oligocene marker of pollen Meyeripollis naharkotensis. The last occurrence of this pollen marks the top Oligocene age. In fact, the appearance of pollen M. Naharkotensis is obviously used to separate Oligocene age from Miocene age in the off-shore area. Moreover, marine micropaleontology analysis on foraminifers and calcareous nannoplankton confi rms this age. The studied sediment was deposited in the transition to shallow marine environment as indicated by rare occurrence of marine microfossils. The common brackish pollen of Zonocostites ramonae (Rizophora) and Spinizonocolpites echinatus (Nypa) indicates mangrove/ back-mangrove environment. Moreover, the domination of shallow water benthonic over the planktonic forms suggests shallow marine setting.
Australian Palinomorphs From The Buya Formation Of The Sula Island Eko Budi Lelono; Nugrahaningsih
Scientific Contributions Oil and Gas Vol. 35 No. 3 (2012): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.35.3.32

Abstract

This research has proved the occurrence of pre-Tertiary palynomorphs within the Buya Formation of the Sula Island. Most palynomorphs have Australian affi nity and appear in most Mesozoic basins in Australia and in Papuan Basin of Papua New Guinea. The palynomorph assemblage mostly consists of spores as well as dinofl agellates. Three micro-fl ora zones can be defi ned referring to the existing index spores, including (from older to younger zone) Contignisporites cooksoniae zone, Murospora fl orida zone and Retitriletes watheroensis zone. Meanwhile, four dinofl agellate zones enable to be constructed such as (from older to younger zone) Caddasphaera halosa zone, Wanaea clathrata-Wanaea indotata zone, Dingodinium swanense zone and Criboperidinium perforans zone-younger zone. Both zonations suggest that the age of the Buya Formation is Middle to Late Jurrasic or Bathonian to Tithonian. From the palaeobiogeographic point of view, the similarity between palynomorphs from the Buya Formation of the Sula Island and those from the Mesozoic sediment of Australia suggests land connection between both areas during Middle to Late Jurassic. It suggests that, during this age, the study area attached the Australian Continent which was situated far South from the equatorial. The study area appears in its recent position during Neogene.
The Use of Palynology in Sequence Stratigrafy Analysis a Case Study, The Eocene Nanggulan Formation Eko Budi Lelono
Scientific Contributions Oil and Gas Vol. 23 No. 3 (2000): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.23.3.130

Abstract

This paper is a part of palynological investigationon The Eocene Nanggulan Formation, Yogjakarta Central Java. The Nanggulan Formation containing rich palynomorph assemblage provider excellent data to support sequence stratigraphy analysis. The palynomorph assemblage changes (especially between mangrove and freshwater palynomorphs) may reflect sea level changes whitch can be used to interpret system tracts, which are the internal building blocks of sequences.
OBTAINING THE SUITABLE TECHNIQUES FOR PALYNOLOGICAL PREPARATION Eko Budi Lelono
Scientific Contributions Oil and Gas Vol. 24 No. 2 (2001): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.24.2.135

Abstract

The term of “standard techniques” in preparation is no longer accepted since every sample has discrete characteristic which may require different treatment. Experiments prove that the modifications are needed to process the Eocene samples from Central Java and South Sulawesi.
LEMIGAS BIOSTRATIGRAPHIC DATA BANK CONSTRUCTION Eko Budi Lelono
Scientific Contributions Oil and Gas Vol. 25 No. 1 (2002): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.25.1.140

Abstract

In accordance with the tasks and functions of LEMIGAS, the Stratigraphy Group of Exploration Division has been constructing a data bank of biostratigraphy which covers the whole areas of Indonesia. This project is financially supported by LEMIGAS and it has been started since 1997. The objective of this project is to collect biostratigraphic data across the Indonesian region. The data are differentiated into two types. The first type is raw data which were extracted from rock samples after laboratory preparation. The second type is data provided from the existing biostratigraphic charts. In addition, data generally derived from wells. Data obtained from the charts need to be re-analysed in order to gain accurate stratigraphic interpretation. The data bank is built by using a computer software called StrataBugs. This software was selected because it provides facilities to perform many types of biostratigraphic diagram which support different analyses. It is also compatible with other biostratigraphic software. The first five years were concentrated on western Indonesia. There are 285 data collected from various areas which consist of foraminifera, nannoplankton and palynology. Apparently, the number of data tends to increase each year. The data bank can be used for either scientific aims or managerial purposes. For scientific aims, these data are temporarily used for reconstructing biozones and palaeoenvironment. However, many analyses can be established by referring to these data such as palaeoclimate, sea level changes and palaeogeography. In fact, two papers have been published based on these data. For managerial purposes, these data may be used to evaluate the performance of Stratigraphy Group relating to commercial works because most data were supplied from service work. These data also support the management to prepare an appropriate strategy to achieve reasonable performance.
Palynology Of The Lower Kalicapung Formation Tlogosari, Central Java Eko Budi Lelono
Scientific Contributions Oil and Gas Vol. 25 No. 2 (2002): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.25.2.144

Abstract

The palynological investigation focuses on the transition sediment of the Lower Kalipucang Formation which overlies the non-marine lava of the Gabon Formation. Both formations are firmly separated by the unconformity which is indicated by the occurrence of basal conglomerate. The Lower Kalipucang Formation outcrops in a small village called Tlogosari, Central Java. Lithologically, it is characterised by the occurrence of basal conglomerate with the intercalation of thin lignites. This lithology is overlain by 2 meter thick of claystone containing lignite strings and some igneous fragments. The intercalation of thin sandstones, conglomerate and lignites are found within claystone lithology. Four samples from the Lower Kalipucang Formation were selected for laboratory processing. Only two samples collected from the upper part of this formation yield rich palynomorphs. The palynomorph assemblage shows the occurrence of brackish and fresh water floras. Based on the appearance of pollen Florschuetzia meridionalis and F. trilobata, it is predicted that the age of the Lower Kalipucang Formation is Middle Miocene. The high abundance of mangrove taxa (especially in sample number LKP-4) such as Avicenia type, Zonocostites ramonae and Camptostemon indicates a well development of mangrove environment. This assumption is supported by well preservation of large mollusc with excellent ornamentation. This ornamentation must have developed in the environment with low energy such as mangrove.
SOUTH NATUNA BASIN RECONFIGURATION BASED ON RECENT SEISMIC AND GRAVITY SURVEYS Tatang Padmawidjaja; Yusuf Iskandar; Andy Setyo Wibowo; Eko Budi Lelono
Scientific Contributions Oil and Gas Vol. 42 No. 2 (2019): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.42.2.183

Abstract

The Geological Survey Center has conducted a seismic survey in the southern Natuna Sea region to obtain geological information below relating to the potential energy resources of the area. The area research is located in the western part and outside the Singkawang Basin area (BG, 2008), which is separated by a Metamorf ridge. 2D seismic survey results show 3 different rock units, namely shallow marine sedimentary rocks, tertiary sedimentary rocks and pre-Tertiary sedimentary rocks, with pre-Tertiary sediment depths of less than 2000 ms. Interpretation of seismic data shows the pattern of graben structures that form sub-basins. strong refl ectors seen in seismic record can distinguish pre-rift, syn-rift and post-rift deposits. There are 2 wells, namely Datuk 1X and Ambu 1X. Datuk 1X has a depth of 1187 meters, and The Ambu 1X has a depth of 880 meters that is crossed by a seismic line. Both drilling has obtained Tertiary aged sandstone that covers pre-Tertiary bedrock.Gravity anomaly data in the seismic region shows anomaly values between 10 to 54 mgal which form the anomaly ridge and basinThe ridge anomaly extends as an anticline, while the anomaly basin also rises to form a syncline. Sincline and anticline trending southwest - southeast, with widening and narrowing patterns.Based on its geological model, the depth of the sediment is relatively shallow between 1500 to 2000 meters. While the integration between seismic, gravity and geomagnetic data shows the discovery of new basins that have never been described before. Finally, the integration of seismic and gravity data succeed discovers a new basin which has never been delineated before. In addition, it shows the continuity of the regional geological structure spanning from the studied area to the West Natuna Basin which is well known to be rich in hydrocarbon potential.
TROPICAL EOCENE PALYNOMORPHS FROM THE TORAJA FORMATION, KALUMPANG, SOUTH SULAWESI Eko Budi Lelono
Scientific Contributions Oil and Gas Vol. 26 No. 1 (2003): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.26.1.184

Abstract

This study enables to prove the occurrence of the tropical Eocene palynomorphs within the South Sulawesi area.
Co-Authors Abdul Kholiq Andy Setyo Wibowo Arifin Budi Mulyana Christina Ani Setyaningsih David Victor Mamengko dedi kurniadi Djoko Sunarjanto Hermes Panggabean Iskandar Firdaus Iyan Haryanto Juwita Trivianty Musu L Nugraha Ningsih L Nugrahaningsih L. Nugrahaningsih Nugrahaningsih Nur Hasjim Panuju Panuju Siti Helmyati Tatang Padmawidjaja Yoga B.Sendjadja