Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal Buletin Sumber Daya Geologi Scientific Contributions Oil and Gas
Very Susanto
Institut Teknologi Bandung
Chemical Engineering, Chemistry & Bioengineering Education Energy Engineering Environmental Science

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
KARAKTERISTIK ENDAPAN LATERIT NIKEL DAN UNSUR TANAH JARANG DI DAERAH PULAU GEBE, HALMAHERA TENGAH, MALUKU UTARA : CHARACTERISTICS OF NICKEL LATERITE DEPOSITS AND RARE EARTH ELEMENTS IN GEBE ISLAND, CENTRAL HALMAHERA, NORTH MALUKU Rabbani Rafif Abidin; Very Susanto; Sulaeman; Hartaja M. Hatta Wicaksono
Buletin Sumber Daya Geologi Vol. 17 No. 2 (2022): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v17i2.345

Abstract

Nickel laterite is a product of weathering of ultramafic rocks that have an abundance of olivine and orthopyroxene minerals. Geology in the Gebe Island, Central Halmahera Regency, North Maluku Province is composed of limestone, which is equivalent to the Waigeo Formation which has an inconsistent relationship with the underlying ultramafic rocks as carriers of laterite nickel deposits. Weathering of ultramafic rocks produces a different profile and character of laterite nickel. This study aims to determine the characteristics of laterite and rocks from the area and to determine the characteristics of rare earth elements. Based on the results of the study, it is known that laterite nickel carriers in the area are dunite. Laterite nickel deposit profile on the island consists of red limonite, yellow limonite, and saprolite. The red limonite zone is characterized by a relatively high Fe2O3 content and a strong degree of lateritization; the yellow limonite zone is characterized by a relatively high Al2O3 content and a weak to strong lateritization degree; the saprolite zone is characterized by a relatively high MgO and SiO2 content. In general, laterite Ni deposits in the study area show relative enrichment of REE to bedrock and LREE content is more abundant than HREE content. Based on the spearman correlation, the main controller of LREE(La-Eu) and HREE(Gd-Lu) enrichment is Fe mineral with the spearman coefficient value between LREE(La-Eu) and HREE(Gd-Lu) with Fe2O3 is 0,64-0,83. While the main controller of Sc enrichment is Al mineral with the spearman coefficient value between Sc and Al2O3 being 0,59.
Geochemical Correlation of Gas and Condensate from The Lower Seurula Reservoir with Potential Source Rocks in The North Sumatra Basin Wiendra Akhmad Faridsyah; Very Susanto
Scientific Contributions Oil and Gas Vol 49 No 3 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i3.2179

Abstract

Recent exploration activities in Block “B” of the North Sumatra Basin, including the acquisition and processing of 610 km² 3D seismic data followed by a two-well exploratory drilling campaign, led to gas and condensate discoveries within the Late Miocene sandstone reservoirs of the Lower Seurula Formation. The campaign targeted two structures: Arun Overburden (AOB), located above the Arun Structure, and Rayeu. Previous studies have focused primarily on the giant Arun and SLS Fields due to their substantial hydrocarbon reserves. Consequently, direct evidence for the source rock charging reservoirs younger than the Early Miocene Peutu Formation carbonates was lacking. Gas and condensate samples from the newly discovered Rayeu CA and AOB-1 wells, along with samples from the Arun and SLS fields, were acquired and subsequently analyzed in the laboratory. Characterization and correlation of both source rock and hydrocarbon samples are the most appropriate methodologies for evaluating their genetic relationship. Although condensates from Arun and AOB-1 exhibit retrograde phase behavior, reliable geochemical interpretations and correlations were obtained. The results indicate that gas and condensate from both Peutu carbonate and Lower Seurula sandstone were generated from a highly mature source rock dominated by algal organic matter, with only a minor contribution from higher plants. These findings suggest that multiple reservoir objectives in “B” Block, particularly in the Lhok Sukon Deep sub-basin, most consistently correlated with a mature Bampo-type marine shale source facies.
Co-Authors Hartaja M. Hatta Wicaksono Rabbani Rafif Abidin Sulaeman Wiendra Akhmad Faridsyah