CHARACTERIZATION OF HYDROCARBON RESERVOIR USING SWEETNESS ATTRIBUTE AND ACOUSTIC IMPEDANCE INVERSION IN NORTH BALI WATERS
| Main Authors: | Pamalik, Aulia Ranggi, Manik, Henry M., Susilohadi |
|---|---|
| Format: | Article info application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University
, 2020
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| Subjects: | |
| Online Access: |
http://journal.ipb.ac.id/index.php/jurnalikt/article/view/32640 http://journal.ipb.ac.id/index.php/jurnalikt/article/view/32640/20954 |
Daftar Isi:
- Reservoir adalah salah satu objek yang menjadi fokus pada tahap eksplorasi dalam industri minyak dan gas. Proses identifikasi dan penggambaran karakter reservoir baik secara kualitatif maupun kuantitatif dilakukan menggunakan data sumur dan data seismik karena kedua data tersebut saling me-lengkapi. Tujuan penelitian ini adalah mengidentifikasi dan menganalisis karakter reservoir hidro-karbon di Perairan Utara Bali menggunakan metode atribut sweetness dan metode inversi impedansi akustik berbasis model. Penelitian ini menggunakan empat buah lintasan seismik laut 2D post-stack time migration dan sebuah data sumur (BLJ-1). Metode atribut sweetness dilakukan dengan menurun-kan informasi data seismik berupa amplitudo dan frekuensi, sedangkan metode inversi impedansi akustik berbasis model dilakukan dengan mengin-tegrasikan data seismik dan data sumur agar di-peroleh sebaran nilai impedansi akustik secara lateral. Hasil penelitian menunjukkan bahwa atribut sweetness dapat mengenali zona reservoir hidrokarbon dari anomali sweet spots pada rentang waktu 750-850 ms. Zona reservoir utamanya tersusun atas batuan karbonat berupa batu gamping (limestone) yang berumur Late Pliocene dan terletak pada kedalaman 680-740 m. Metode inversi berbasis model mampu memberikan nilai korelasi yang tinggi dan galat inversi yang rendah sehingga dapat mendeter-minasi lapisan batuan yang diprediksi mengandung gas. Penggunaan atribut sweetness dan inversi berbasis model, dapat mengidentifikasi dan mampu menggambarkan karakter reservoir dengan baik.
- Reservoir is an object that be focus at exploration stage of the oil and gas industry. The process of identifying and depicting reservoir characters both qualitatively and quantitatively is carried out using well and seismic data because these two data are complementary. The aim of this study is to identify and analyze the character of hydrocarbon reservoir in North Bali Waters using sweetness attribute method and model-based acoustic impedance inversion method. This study uses four 2D post-stack time migration seismic and a well (BLJ-1) data. The sweetness attribute method is carried out by extracting basic information derivatives from seismic data (amplitude and frequency), while the model-based acoustic impedance inversion method is carried out by integrating seismic and well data in order to obtain the lateral distribution of acoustic impedance values. The results showed that sweet-ness attribute can identify the hydrocarbon reservoir zone from sweet spots anomaly at time window 750-850 ms. The main reservoir zone is composed by carbonate rocks (limestone) aged Late Pliocene and located at 680-740 m depth. Model-based inversion method is able to provide high correlation values and low inversion errors, so it can determines the rock layers that predicted with gas-contain. The use of sweetness attribute and model-based inversion method can identify and describe reservoir characters well.