Implementation 3D Inversion of Gravity Data to Identify Potential Hydrocarbon Reservoir Zones in West Timor Basin

Rosid, Mohammad Syamsu; Saraswati, Cicilia Budi

doi:10.17576/jsm-2020-4909-04

Cited by 3 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Data gravitasi digunakan sebagai data primer dan didukung oleh data seismik dan geologi sebagai data sekunder. Metode gravitasi diharapkan dapat menggambarkan struktur bawah permukaan berdasarkan variasi nilai kerapatan batuan yang ada di bawah permukaan, terutama deskripsi keberadaan dan kedalaman lapisan basemen (Rosid dan Saraswati, 2020). Lapisan pra-tersier di Sumatra umumnya terbentuk dari batuan metamorf dan batuan beku (Metcalfe, 2013;Handini dkk., 2017), sehingga ia akan memiliki kontras densitas yang sangat tinggi dengan lapisan sedimen diatasnya.…”

Section: Pendahuluanunclassified

Identifikasi Potensi Jebakan Hidrokarbon di Daerah â€œXâ€ Sedimen Pra-Tersier Cekungan Sumatra Utara Menggunakan Data Gravitasi dan Seismik

Rosid

2020

View full text Add to dashboard Cite

Penemuan minyak dan gas bumi pada cekungan di Indonesia yang umumnya berasal lapisan tersier, saat ini terus mengalami pengurangan. Oleh karena itu eksplorasi hidrokarbon terus dilakukan melalui diversifikasi pencarian lapangan baru dan penggunaan konsep reservoar baru. Studi di daerah â€œXâ€ pada Cekungan Sumatra Utara ini bertujuan untuk menemukan reservoar hidrokarbon baru dengan menggunakan konsep baru lapisan pra-tersier. Oleh karena itu, perlu untuk mengidentifikasi keberadaan lapisan basemen pra-tersier sebagai batas dari lapisan yang berpotensi sebagai reservoir. Metode yang digunakan dalam penelitian ini adalah pemodelan ke depan 2D data gravitasi yang didukung oleh data sekunder penampang seismik. Model bawah permukaan telah dibuat dalam 2 penampang, lintasan 4 dan lintasan 6. Selain itu, metode FHD (first horizontal derivative) dan SVD (second vertical derivative) dilakukan juga untuk mengkarakterisasi struktur patahan yang ada. Hasil pemodelan ke depan 2D pada lintasan 4 dan 6 menunjukkan adanya basemen pra-tersier pada kedalaman sekitar 6.000 m. Hasil pemodelan juga menunjukkan adanya beberapa formasi batuan di atas lapisan basemen yang terdiri dari formasi pra-tersier dan tersier. Struktur yang ditunjukkan dalam analisis FHD dan SVD sebagian besar adalah sesar naik. Hasil gravitasi dikonfirmasi oleh data dari penampang seismik dan geologi. Ada dua formasi di lapisan dalam tepat di atas basemen pra-tersier yang berpotensi sebagai reservoir yang baik, yaitu Formasi Tampur yang didominasi oleh batuan karbonat dan Formasi Parapat.

show abstract

Section: Pendahuluanunclassified

Identifikasi Potensi Jebakan Hidrokarbon di Daerah â€œXâ€ Sedimen Pra-Tersier Cekungan Sumatra Utara Menggunakan Data Gravitasi dan Seismik

Rosid

2020

View full text Add to dashboard Cite

show abstract

“…First, earthquake relocation was conducted using the double-difference method [8], and a local velocity model was obtained by Velest [9]. Second, the analysis of the first horizontal derivative (FHD) of high-resolution satellite gravity data was used to obtain fault alignment [10]. Finally, the static pressure was analyzed to find the presence of external factors that may trigger a series of earthquakes in the Mamasa region.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Mamasa Earthquake Source Based on Hypocenter Relocation and Gravity Derivative Data Analysis

Rosid¹

2022

GEOMATE

View full text Add to dashboard Cite

Mamasa, located in West Sulawesi, Indonesia, is a populous dense area with a low seismic hazard. In this area, the question of fault reactivation was raised due to the 804 reported earthquakes from November 2018 to February 2019. This series does not show an apparently major earthquake or behaviors, such as swarms. One month earlier, on 28 September 2018, the 7.6 Mw Palu earthquake occurred at a distance of approximately 230 km north of Mamasa. It affected the occurrence of this swarm since Mamasa has many hydrothermal manifestations, which have been linked with seismic activity. To investigate the roles of these two factors, the series of earthquakes and their possible linked faults must be characterized. Specifically, the double-difference hypocenter relocation method was used to relocate the earthquakes and conduct a spatiotemporal analysis of this swarm. Furthermore, the FHD (first horizontal derivative) gravity data were used to illuminate the possible linked fault. To assess the impact of the Palu earthquake, the Coulomb stress was calculated, and it was reported that it was very small. Therefore, it played an insignificant role in triggering the swarm. In contrast, the relocated earthquakes are concentrated in an area surrounded by surface hydrothermal manifestations, and the swarm feature is consistent with the interpretation of associated seismicity. Therefore, hydrothermal activities play a critical role in triggering the swarm.

show abstract

Two-sided fault parameter assessment through the utilization of a particle swarm optimizer to different gravity horizontal gradients-orders with application to various cases studies

Elhussein,

Abo-Ezz,

Gomaa

et al. 2023

Environ Earth Sci

View full text Add to dashboard Cite

Metaheuristic methods are increasingly being implemented to source parameter estimation of gravity anomalies. These approaches have become popular in the geophysical community because of their superior advantages. We emphasize the application of the particle swarm optimizer (PSO), which is motivated by the birds’ behaviors, to elucidate gravity anomalies. Besides, using different horizontal derivative orders for the observed data is valuable in reducing the regional field effect. The current inversion algorithm applied to other synthetic models (a two-sided dipping fault with a third-order regional, a two-sided dipping fault model interfered by a spherical structure model with and without 10% noise, and two neighboring two-sided dipping faults models with and without 10% noise) as well as two real-world cases from the United States and Tunisia. The usefulness of applying these techniques together was demonstrated by providing stable results in executing the buried source parameters and eradicating the regional field effect. Therefore, we recommend the application of these techniques in the model parameter estimation studies performed with potential field anomalies due to mineralized zones.

show abstract

Implementation 3D Inversion of Gravity Data to Identify Potential Hydrocarbon Reservoir Zones in West Timor Basin

Cited by 3 publications

References 7 publications

Identifikasi Potensi Jebakan Hidrokarbon di Daerah â€œXâ€ Sedimen Pra-Tersier Cekungan Sumatra Utara Menggunakan Data Gravitasi dan Seismik

Identifikasi Potensi Jebakan Hidrokarbon di Daerah â€œXâ€ Sedimen Pra-Tersier Cekungan Sumatra Utara Menggunakan Data Gravitasi dan Seismik

Characterization of the Mamasa Earthquake Source Based on Hypocenter Relocation and Gravity Derivative Data Analysis

Two-sided fault parameter assessment through the utilization of a particle swarm optimizer to different gravity horizontal gradients-orders with application to various cases studies

Contact Info

Product

Resources

About

Implementation 3D Inversion of Gravity Data to Identify Potential Hydrocarbon Reservoir Zones in West Timor Basin

Cited by 3 publications

References 7 publications

Identifikasi Potensi Jebakan Hidrokarbon di Daerah â€œXâ€ Sedimen Pra-Tersier Cekungan Sumatra Utara Menggunakan Data Gravitasi dan Seismik

Identifikasi Potensi Jebakan Hidrokarbon di Daerah â€œXâ€ Sedimen Pra-Tersier Cekungan Sumatra Utara Menggunakan Data Gravitasi dan Seismik

Characterization of the Mamasa Earthquake Source Based on Hypocenter Relocation and Gravity Derivative Data Analysis

Two-sided fault parameter assessment through the utilization of a particle swarm optimizer to different gravity horizontal gradients-orders with application to various cases studies

Contact Info

Product

Resources

About

Identifikasi Potensi Jebakan Hidrokarbon di Daerah â€œXâ€ Sedimen Pra-Tersier Cekungan Sumatra Utara Menggunakan Data Gravitasi dan Seismik

Identifikasi Potensi Jebakan Hidrokarbon di Daerah â€œXâ€ Sedimen Pra-Tersier Cekungan Sumatra Utara Menggunakan Data Gravitasi dan Seismik