Papers by andang bachtiar
Geo‐archaeological prospecting of Gunung Padang buried prehistoric pyramid in West Java, Indonesia
Archaeological Prospection
The multidisciplinary study of Gunung Padang has revealed compelling evidence of a complex and so... more The multidisciplinary study of Gunung Padang has revealed compelling evidence of a complex and sophisticated megalithic site. Correlations between rock stratifications observed through surface exposures, trenching and core logs, combined with GPR facies, ERT layers, and seismic tomograms, demonstrate the presence of multi‐layer constructions spanning approximately 20–30 m. Notably, a high‐resistive anomaly in electric resistivity tomography aligns with a low‐velocity anomaly detected in seismic tomography, indicating the existence of hidden cavities or chambers within the site. Additionally, drilling operations revealed significant water loss, further supporting the presence of underground spaces. Radiocarbon dating of organic soils from the structures uncovered multiple construction stages dating back thousands of years BCE, with the initial phase dating to the Palaeolithic era. These findings offer valuable insights into the construction history of Gunung Padang, shedding light on...
Some Indonesia's Giants: 'Unconventional' Hydrodynamic Trap?
Proc. Indon Petrol. Assoc., 36th Ann. Conv., Mar 5, 2018
The Northern Kutai Basin has been considered lacking hydrocarbon prospectivity when it's compared... more The Northern Kutai Basin has been considered lacking hydrocarbon prospectivity when it's compared to the Southern Kutai Ba sin or the Eastern Kutai Basin where many Neogene reservoir rocks has high h ydrocarbons productivity. The Kutai Basin's sediments are older toward northern and western boundary of the Basin which is the Paleogene sediment was cropping out.
New Insights into the Petroleum Geology of the Mountain Front Area Central Sumatra Basin
Facies Model of Upper Kais Member; A Case Study of the Miocene Carbonates Reservoir in Bintuni Basin, West Papua
The Application of Seismic Attributes to Determine Geomorphology of Submarine Canyons: New Insight from Giant Foresets
Proc. Indonesian petrol. Assoc., 39th Ann. Conv.
Paleostress Analysis of the Grindulu Fault in Pacitan and Surrounding Area and its Implication to the Regional Tectonic of East Java
Proc. Indonesian petrol. Assoc., 39th Ann. Conv.
Surface Data Re-Evaluation Eocene Source Rock Potential And Hydrocarbon Seepage, And Eocene Sand Reservoir Prospectivity In West Sangatta, Northern Kutai Basin
Proc. Indon Petrol. Assoc., 37th Ann. Conv.
The Northern Kutai Basin has been considered lacking hydrocarbon prospectivity when it’s compared... more The Northern Kutai Basin has been considered lacking hydrocarbon prospectivity when it’s compared to the Southern Kutai Ba sin or the Eastern Kutai Basin where many Neogene reservoir rocks has high h ydrocarbons productivity. The Kutai Basin’s sediments are older toward northern and western boundary of the Basin which is the Paleogene sediment was cropping out.
The Application of Seismic Attributes in Accordance with the Analogue Model to overcome the Failure of Derived Acoustic Impedance in Mapping the Facies Distribution: Case Study of Talang Akar Formation, West Java
ABSTRACT
Some Indonesia's Giants: 'Unconventional' Hydrodynamic Trap?
Proc. Indon Petrol. Assoc., 36th Ann. Conv.
Characteristic of Cibulakan Marine Reservoir Based on Modern Analogue in Teluk Naga & Parang Tritis Beach, Java, Indonesia
Archaeological Prospections Journal, 2023
The multidisciplinary study of Gunung Padang has revealed compelling evidence of a complex and so... more The multidisciplinary study of Gunung Padang has revealed compelling evidence of a complex and sophisticated megalithic site. Correlations between rock stratifications observed through surface exposures, trenching and core logs, combined with GPR facies, ERT layers, and seismic tomograms, demonstrate the presence of multi-layer
The Reservoir Characteristic of Eocene Tanjung Formation in North-West Barito Basin, Indonesia: Implication for Petroleum System
Mesozoic-Aged Oils in the Northeast Java Basin, Indonesia: Evidence from Triaromatic Dinosteroid
Proc. Indonesian petrol. Assoc., 40th Ann. Conv.
IOP Conference Series: Earth and Environmental Science, 2017
The development of unconventional shale hydrocarbon is really depending on integrating approach o... more The development of unconventional shale hydrocarbon is really depending on integrating approach of wide range disciplines. The integrated approach for analysing organicrich shale reservoirs involves calibration of core and well-log data, building petrophysical and rock-physics models, and finally characterizing the key reservoir parameters (TOC, porosity, and natural fractures) and mechanical properties evaluation from seismic data. In this research, integrated approach of geochemical, geomechanical, mineralogy, petrophysical, and geophysical analysis are carried out in Brown Shale, Central Sumatera Basin. Total Organic Carbon (TOC), maturity, and brittleness index are the main parameters used in this study to analyse the shale hydrocarbon potential. The result of geochemical analysis shows that the maturity level of shale in the interest zone in oil window, which means it can generate shale oil in early mature phase at depth of 6400 ft. Quantity of shale hydrocarbon potential is indicated by the TOC value of 0.5-1.2 wt. % (fair to good), with average of shale thickness for over 50 ft. The result of geomechanical analysis shows that brittleness index of interest zone for over 0.48 and rock strength below 10000 Psi.
Dry Hole Revival through Well Post Mortem Evaluation
Proc. Indon Petrol. Assoc., 34th Ann. Conv.
Basically, a well postmortem is carried out in order to find out as to why there is no producible... more Basically, a well postmortem is carried out in order to find out as to why there is no producible hydrocarbon in a well despite the existence of favorable geological factors and convincing hydrocarbon shows either during drilling or based on well evaluation of E-logs. Subsequently, result of the postmortem can then be used to determine strategy for the next exploration/appraisal plan. A well postmortem often come up with findings that geologically the well is not really dry but was either considered as dry or inconclusive due to non-geological related factors.
Paleozoic Lacustrine Sediment at West Timor and Tectonic Implication for Timor Island, New Exploration Concept of Hydrocarbon
Proc. Indonesian petrol. Assoc., 40th Ann. Conv.
The Reservoir Characteristic of Eocene Tanjung Formation in North-West Barito Basin, Indonesia: Implication for Petroleum System
The Boundary Character of Pre-Tertiary and Tertiary Rocks in The Southern of The North Sumatra Basin : Barisan Mountain Thrust Front?
Proc. Indon Petrol. Assoc., 36th Ann. Conv.
Traditional perception considers the Sumatran splay fault act as boundary of Pre-Tertiary rock an... more Traditional perception considers the Sumatran splay fault act as boundary of Pre-Tertiary rock and Tertiary rock where Pre-Tertiary rock is thrusted (by thrust fault) upon the Tertiary rock, called ‘the Barisan Mountain Thrust Front’. The purpose of this paper is to understand whether the boundary character of Pre-Tertiary and Tertiary rocks in the western margin of the southern end of the North Sumatra Basin is thrust fault boundary or other kind. Method used in this study consists of examination of geological cross section on published geological maps, 2D seismic interpretations, and field observation in Batang Sarangan River, nearby the seismic lines area. The fieldwork result indicates outcrops of Belumai Formation (Tertiary rocks) near the seismic lines. The seismic sections also indicate there is no thrust fault geometry. Moreover, those sections indicate onlap of the Tertiary Rocks onto the Pre-Tertiary Rocks. It is concluded the boundary character of Pre-Tertiary and Tertiary rocks in the western margin of the southern end of the North Sumatra Basin is not necessary as a thrust fault. Hence, the perception of the boundary of Pre-Tertiary rock with Tertiary rock as thrust fault is questionable
Petroleum system of the Kutei basin, Kalimantan, Indonesia
Proceedings of an International Conference on Petroleum Systems of SE Asia and Australasia
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Papers by andang bachtiar