Az Zahra Hanifa, Zaman (2026) Karakterisasi Reservoir Karbonat Patch Reef Formasi Kujung Lapangan "S" Cekungan Jawa Timur Utara Menggunakan Reduksi Dimensi Multi-Atribut Seismik Berbasis Self-Organizing Map (SOM) Dengan Clustering K-Means. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Lapangan S berada pada Cekungan Jawa Timur Utara dengan target Formasi Kujung yang sebagai reservoir hidrokarbon produktif. Pada penelitian ini dilakukan analisis Inversi Impedansi Akustik (AI), Atribut Seismik RMS Amplitude dan Sweetness, serta analisis multiatribut seismik menggunakan SOM dan K-Means untuk mengetahui karakteristik reservoir karbonat Formasi Kujung menggunakan data seismik 3D Post-Stack Time Migration, dua data sumur, dan dua horizon. Hasil atribut RMS Amplitude dan Sweetness pada horizon K1Z1 menunjukkan bahwa Sumur S4 yang berada pada posisi high structure patch reef menunjukkan amplitudo dan sweetness tinggi yang mengindikasikan karbonat bersih berporositas baik dengan porositas 13,3% dan saturasi air 57%, sedangkan Sumur S3 yang berada pada posisi low structure menunjukkan amplitudo dan sweetness rendah yang konsisten dengan karakter water bearing dengan saturasi air 100%. Hasil inversi AI model-based menunjukkan zona porous carbonate dengan nilai AI di bawah 8.400 g/cc·m/s dan zona tight carbonate di atas nilai tersebut, dikonfirmasi oleh peta slicing AI pada horizon K1Z1 yang menunjukkan kedua sumur berada pada zona porous dengan nilai 4.224–6.344 g/cc·m/s. Hasil analisis multiatribut SOM grid 7×7 dan K-Means mengklasifikasikan zona penelitian menjadi tiga fasies yaitu Porous, Transition, dan Non-Porous dengan Silhouette score 0,70, dimana Sumur S3 dan S4 keduanya berada pada fasies porous carbonate yang konsisten dengan hasil atribut dan inversi AI. Dengan demikian, integrasi inversi AI, atribut RMS Amplitude dan Sweetness, serta fasies seismik SOM dan K-Means mampu mengkarakterisasi reservoir karbonat Formasi Kujung secara terintegrasi dan konsisten pada Lapangan S, dimana kontrol utama distribusi fluida dikontrol oleh posisi struktural terhadap kontak fluida.
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Field S is located in the North East Java Basin, with the Kujung Formation as the target, which has been proven to be a productive hydrocarbon reservoir. This study conducted Acoustic Impedance Inversion (AI) analysis, RMS Amplitude and Sweetness seismic attribute analysis, as well as multi-attribute seismic analysis using SOM and K-Means to determine the characteristics of the Kujung Formation carbonate reservoir using 3D Post-Stack Time Migration seismic data, two well logs, and two horizons. The results of the RMS Amplitude and Sweetness attributes at the K1Z1 horizon indicate that Well S4, located in a high-structure patch reef area, exhibits high amplitude and sweetness values, suggesting clean carbonate with good porosity (13.3%) and water saturation of 57%, whereas Well S3, located in a low-structure area, exhibits low amplitude and sweetness values consistent with a water-bearing zone with 100% water saturation. The results of the model-based AI inversion with high correlation coefficients (S3: 0.986; S4: 0.983) revealed a porous carbonate zone with AI values below 8,400 g/cc·m/s and a tight carbonate zone above that value, confirmed by the AI slicing map of the K1Z1 horizon, which shows that both wells are located in the porous zone with values ranging from 4,224 to 6,344 g/cc·m/s. The results of the 7×7 SOM grid and K-Means multi-attribute analysis classified the study area into three facies Porous, Transition, and Non-Porous with a Silhouette score of 0.70, where both Wells S3 and S4 are located in the porous carbonate facies, consistent with the AI attribute and inversion results. Thus, the integration of AI inversion, RMS Amplitude and Sweetness attributes, as well as SOM and K-Means seismic facies analysis, enables an integrated and consistent characterization of the Kujung Formation carbonate reservoir in Field S, where the distribution of fluids is primarily controlled by structural position relative to fluid contacts.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Atribut Seismik, Formasi Kujung, Inversi Model-Based, Self-Organizing Map, Karakterisasi Reservoir, Seismic Attributes, Kujung Formation, Model-Based Inversion, Self-Organizing Map, Reservoir Characterization. |
| Subjects: | Q Science > QE Geology > QE538.5 Seismic tomography; Seismic waves. Elastic waves |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Az Zahra Hanifa Zaman |
| Date Deposited: | 22 Jul 2026 05:46 |
| Last Modified: | 22 Jul 2026 05:46 |
| URI: | http://repository.its.ac.id/id/eprint/136203 |
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