Electronic Theses and Dissertation

Lapangan penobscot di cekungan scotian, kanada, merupakan salah satu daerah yang memiliki sistem reservoir kompleks akibat pengaruh struktur geologi dan variasi litologi. karakterisasi reservoir diperlukan untuk memperoleh informasi mengenai kondisi bawah permukaan serta sebaran reservoir hidrokarbon. penelitian ini bertujuan untuk (1) memperoleh peta struktur kedalaman (depth structure map), (2) menganalisis hubungan kedua atribut tersebut dengan karakteristik reservoir., serta (3) mengidentifikasi sebaran reservoir menggunakan atribut seismik rms amplitude dan frekuensi. penelitian ini menggunakan data seismik 2d dan data sumur b-41 serta l-30 yang meliputi log gamma ray (gr), induction log deep (ild), neutron porosity (nphiss), marker horizon, dan data checkshot. tahapan penelitian meliputi well-to-seismic tie, interpretasi horizon, pembuatan peta struktur kedalaman, ekstraksi atribut rms amplitude dan frekuensi, serta integrasi hasil interpretasi seismik dengan data sumur. hasil penelitian menunjukkan bahwa struktur bawah permukaan dikontrol oleh sesar normal yang memengaruhi konfigurasi horizon pay sand 4 hingga pay sand 7. analisis atribut seismik menunjukkan bahwa pay sand 6 dan pay sand 7 memiliki nilai rms amplitude tinggi, yaitu sekitar 1.250 hingga lebih dari 2.000 pada lintasan l-30 dan sekitar 1.000 hingga 1.500 pada lintasan b-41. nilai tersebut juga berkorelasi dengan anomali frekuensi rendah sebesar 0–20 hz. hasil tersebut konsisten dengan interpretasi well log yang menunjukkan litologi batupasir, nilai resistivitas tinggi, dan porositas yang baik. integrasi data seismik dan data sumur menunjukkan bahwa sebaran reservoir dikontrol oleh kombinasi faktor litologi dan struktur sesar, sehingga pay sand 6 dan pay sand 7 diinterpretasikan sebagai target reservoir yang paling prospektif pada daerah penelitian. hasil penelitian ini juga menunjukkan kesesuaian dengan penelitian-penelitian terdahulu yang menggunakan pendekatan metode yang berbeda. penelitian selanjutnya disarankan untuk menambahkan lintasan seismik 2d serta mengintegrasikan analisis petrofisika yang lebih komprehensif, termasuk validasi menggunakan data inti (core) apabila tersedia, guna meningkatkan akurasi karakterisasi reservoir. kata kunci: lapangan penobscot, seismik refleksi-well log, rms amplitude, frekuensi, reservoir.

The Penobscot Field in the Scotian Basin, Canada, is characterized by a complex reservoir system resulting from the influence of geological structures and lithological variations. Reservoir characterization is essential for obtaining subsurface information and delineating hydrocarbon reservoir distribution. This study aims (1) to generate a depth structure map, (2) analyze the relationship between these attributes and reservoir characteristics and (3) identify reservoir distribution using seismic attributes which are the RMS Amplitude and frequency, . The study utilized 2D seismic data and well data from wells B-41 and L-30, including Gamma Ray (GR), Induction Log Deep (ILD), Neutron Porosity (NPHISS), horizon markers, and checkshot data. The research workflow consisted of well-to-seismic tie, horizon interpretation, depth structure mapping, RMS Amplitude and frequency attribute extraction, and integration of seismic interpretation with well data. The result indicates that the subsurface structure is controlled by normal faults, which influence the configuration of pay sand 4 to pay sand 7 horizons. Seismic attribute analysis shows that pay sands 6 and 7 exhibit high RMS Amplitude values, ranging from approximately 1,250 to more than 2,000 along the line L-30 and from 1,000 to 1,500 along the line B-41. Those values are also well-correlated with low-frequency anomalies of 0–20 Hz. These findings are consistent with well log interpretation, which indicates the sandstone lithology, high resistivity, and good porosity characteristic. The integration of seismic and well data demonstrates that reservoir distribution is controlled by the combined effects of lithology and fault structures, indicating that pay sands 6 and 7 represent the most prospective reservoir targets within the study area. These findings are consistent with previous studies applying different methods.. Future studies are recommended to incorporate additional 2D seismic lines and integrate more comprehensive petrophysical analyses, including validation with core data if available to improve reservoir characterization accuracy. Keywords: Penobscot Field-Canada, seismic attributes-well log data, RMS Amplitude, frequency, reservoir.