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All Journal IJOG : Indonesian Journal on Geoscience Journal of Geoscience, Engineering, Environment, and Technology JURNAL PENDIDIKAN TAMBUSAI Indonesian Journal on Geoscience Community Empowerment Indonesian Journal on Geoscience International Journal of Community Service Jurnal Penelitian dan Karya Ilmiah Lembaga Penelitian Universitas Trisakti Jurnal AKAL: Abdimas dan Kearifan Lokal Petro : Jurnal Ilmiah Teknik Perminyakan Journal of Geoscience Engineering and Energy (JOGEE) Journal of Geosciences and Applied Geology LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI Scientific Contributions Oil and Gas
Yarra Sutadiwiria
Geology Department, Faculty Of Earth Technology And Energy, Universitas Trisakti, Jln. Kyai Tapa No. 1, Jakarta 11440,
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Thermal Maturation Trend and Cluster Validation Using K-Means Clustering: Case Study in Salawati Basin Muhartanto, Arista; Sutadiwiria, Yarra; Mordekhai, Mordekhai; Ronoatmojo, Imam Setiaji; Riyandhani, Cahyaningratri Prima; Burhannudinnur, Muhammad
Indonesian Journal on Geoscience Vol. 11 No. 1 (2024)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.11.1.111-122

Abstract

In the last few years, exploration activities have experienced obstacles and have not attracted much attention from researchers in Indonesia. One of the basins in Indonesia that is still interesting is Salawati Basin in West Papua, Indonesia. Several studies related to petroleum systems have been carried out in this basin, especially those that control the migration of hydrocarbon in Salawati Basin. This research was conducted on three wells located in the western of Salawati Basin to evaluate the characteristics and the maturity of the source rock, especially the Sirga Formation. This formation is penetrated by wells MM-02, MM-03, and MM-04, by using the K-Means Clustering method to validate several parameter variations of the maturity level. K-means cluster performs data from various parameters of maturity level with predefined three numbers of cluster. The thermal evolution of source rocks can alter organic matter physical and chemical properties, converting it into hydrocarbon compounds. The selected maturity parameters have good sensitivity to the determination of thermal maturity including phenanthrene (P), in addition to the MPI (methylphenanthrene index) parameter which was obtained from mass chromatograms m/z 178 and m/z 192 based on the peak area of P and methylphenanthrene (MP). Based on the appearance of the crossplot, both Radke and Kvalheim Formulas show that the maturity in studied area is divided into three main zones: peak maturity zone, early maturity zone, and outliers. This study also found that increasing thermal maturity is correlativewith the increasing depth.
The Influence of Asymmetrical Formation from Makassar Basin to the Geochemical Characteristics of Mallawa Formation Sutadiwiria, Yarra; Ronoatmojo, Imam Setiaji; Fathaddin, Muhammad Taufiq; Rendy; Riyandhani, Cahyaningratri Prima; Yusuf, Ariq Haykal; Aufariq Asaria Cifa; Mordekhai; Yeftamikha; Amalia; K.Gunawan, Brahmantyo
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 3 (2025): JGEET Vol 10 No 03 : September (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.3.22993

Abstract

A functional hydrocarbon system relies on three key elements: source rock, reservoir rock, and seal rock. These components are essential in assessing the hydrocarbon potential of a region. In South Sulawesi, the Makassar Basin shows promise for petroleum development, particularly with the Mallawa Formation an Early to Late Eocene unit serving as a potential source rock. Source rocks play a critical role in generating and storing hydrocarbons. Indonesia’s frequent oil and gas exploration activities are driven by the presence of numerous prospective hydrocarbon-bearing areas. It's crucial to recognize that source rocks typically form within sedimentary basins. The Makassar Basin, a land-based Tertiary sedimentary basin situated along western and southern Sulawesi, originated from tectonic activity, specifically the widening of the Makassar Strait, which began no later than the Early Paleocene. This tectonic evolution significantly affected the thermal maturation of the basin’s source rocks. This study applies geochemical analysis of cutting samples to evaluate the maturity of these rocks. The findings contribute valuable understanding to hydrocarbon exploration in South Sulawesi, a region characterized by a complex tectonic framework. The results of laboratory analyses show that sustainable hydrocarbon exploration may be possible in South Sulawesi, especially in Balangbaru Formation, which is believed to be a potential source rock, in addition to the Mallawa Formation.
A Regression Analysis Approach to Van Everdingen-Hurst Dimensionless Water Influx Variables for Infinite and Finite Aquifers Muhammad Taufiq Fathaddin; Yarra Sutadiwiria; Taufan Marhaendrajana; Sonny Irawan; Onnie Ridaliani Prapansya; Asri Nugrahanti
Scientific Contributions Oil and Gas Vol 47 No 1 (2024)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.47.1.1612

Abstract

Water influx calculations have relied on accurate values of the Van Everdingen-Hurst WeD dimensionless variables. For programming and hand calculators, equations are needed to determine WeD. Previous models provide equations for WeD calculations for infinite aquifer cases. This paper presents two sets of regression equations that are simple to apply to obtain accurate values of WeD for either infinite or finite aquifer cases. The proposed equations have good agreement with the Van Everdingen-Hurst method with an average difference of 0.77% and 1.18% for the cases of infinite aquifer and finite aquifer, respectively
The Influence of Side-Slip Velocity on Subsurface Displacement Imam Setiaji Ronoatmojo; Muhammad Burhannudinnur; Yarra Sutadiwiria; Dewi Syavitri
Scientific Contributions Oil and Gas Vol 47 No 2 (2024)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.47.2.1620

Abstract

This research aimed to determine the influence of side-slip velocity on subsurface displacement during seismic data acquisition. Anisotropy constants were used to determine the depth migration process before stack, which showed inadequate results after data validation. Therefore, the forward modeling of a medium, which comprised anisotropy constants of normal and offset raytracing was conducted to address this problem. The configuration of source to receiver were orthogonal and slant. The results showed that the migration process failed to resolve the geological structures of the position shifting. The configuration of source to receiver were orthogonal and slant. The results show the better continuity of slant and the influence of complex geological structures controls the position shifting, which could not be resolved by the migration process. It could be seen from the random distribution of the normal shift of group velocity and phase velocity, as well as the CDP – CRP shift. It produced wave azimuth rotation in a discontinuity plane, such as fault and anticline ridge. This azimuth rotation was strongly suspected to cause inaccurate anisotropy constants implementation in pre-stack depth migration process
The Influence of Fluid Dynamics on Physical Uncertainties of Hydrocarbon Reservoir Imam Setiaji Ronoatmojo; Muhammad Burhannudinnur; Yarra Sutadiwiria; Dewi Syavitri; Grace Stephani
Scientific Contributions Oil and Gas Vol 48 No 2 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i2.1761

Abstract

Uncertainty is often present in the relationship between physical property variables and the complexity increases, when mechanical properties are included. The problems becomes more interesting in cases, where fluid dynamics act as the primary contributing factor. Pore pressure changes is the main actor of every uncertainty of physical properties. Therefore, this study aimed to examine the influence of fluid dynamics on physical uncertainties of hydrocarbon reservoir. To achieve this objective, well data from production and enhanced oil recovery (EOR) operations between 1994 to 2007 were entangled. Specifically, 3D seismic data was incorporated to distribute physical and mechanical properties after well periodization. In this study, the impact of pore pressure changes on minimum horizontal stress from 1994-2017 was also examined. The results showed that changes in porosity were not significant, but variations in bulk modulus and Poisson's ratio remained observable. Furthermore, tensors field were not dominated by vertical stress, instead of horizontal stresses. Changes in pore pressure apparently had a significant impact on minimum horizontal stress. The increase of  minimum horizontal stress reached approximately one third of pore pressure change. Consequently, the stress regime transitioned from the strike-slip fault in 1994 to thrust fault in 2017, emphasizing a significant increase in the influence of horizontal stress. While water injection and oil production did not lead to significant changes in physical properties, the effects were evident in the variations of Poisson's ratio.
Co-Authors Ahmad Helman Hamdani Ahmad Helman Hamdani, Ahmad Helman Amalia Andriana, Yoga Andy Livsey Anggarini, Kinanti Sayekti Anjar Kurnia Ramadhan Ardilla Jefri Karista Arista Muhartanto, Arista Asri Nugrahanti Asy’ari Alfin Giovany Aufariq Asaria Cifa Bani Nugroho Barona Belladesta Benyamin Benyamin Budi Wijaya Cahaya Rosyidan Cahyaningratri Cahyaningratri P R Cahyaningratri P.R. Cahyaningratri Prima Riyandhani Cahyaningratri Primadani Desta, Barona Bella Edy Sunardi Eko Bayu Purwasatriya Emelia Sari Filipus Armando Armando Ginting Firman Herdiansyah Gentala Ardikasa Grace Stephani Hamdani, Ahmad Helman Harin Widiyatni Haryanto, Iyan Himmes Fitra Yuda Himmes Fitra Yuda Imam Setiaji Ronoatmojo Imam Setiaji Ronoatmojo Irina Letlora Iyan Haryanto Iyan Haryanto, Iyan Jambak, Moehammad Ali Jane, Gabey K.Gunawan, Brahmantyo Lalita A'fin Lalita ‘Afin Mira Meirawaty Mixsindo Korra Herdyanti Moehammad Ali Jambak Mohammad Apriniyadi Mordekhai Mordekhai, Mordekhai Muhammad Burhannudinnur Muhammad Burhannudinnur Muhammad Taufiq Fathaddin, Muhammad Taufiq Muhammad Yusril Ihza Mahendra Triany Mustamina Maulani Novi Triany Onnie Ridaliani Prapansya Onnie Ridaliani, Onnie Pauhesti Pauhesti Pauhesti, Pauhesti Raffiwan, Azka Fadhillah Ramadhani Yaniar Rendy Riezky Kokky Mahendra Rosmalia Dita Nugraheni Rosmalia Ditha Nugraheni Sendjaja, Yoga Andriana Sonny Irawan Sonny Irawan Suci Maharani Suliestyah Suliestyah Sunny Yulia, Prayang Suryo Prakoso Syavitri, Dewi Taufan Marhaendrajana, Taufan Widia Yanti, Widia Yeftamikha Yeftamikha Yeftamikha Yeftamikha Yeftamikha Yeftamikha Yeftamikha Yeftamikha Yeftamikha Yeftamikha, . Yeftamikha, Yeftamikha Yeftamikha, Yeftamikha Yeftamikha, Yeftamikha Yoga Andriana Sendjaja Yoga Andriana Sendjaja, Yoga Andriana Yulia, Prayang Sunny Yusriani, Anggi Yusuf, Ariq Haykal