STRATIGRAFI SEISMIK UNTUK INTERPRETASI FASIES PENGENDAPAN BERDASARKAN DATA SEISMIK 2D PADA DAERAH LEPAS PANTAI ONIN, PALUNG SERAM

ACHMAD FAUZI, Salahuddin Husein, S.T., M.Sc, Ph.D

2013 | Skripsi | TEKNIK GEOLOGI

Daerah lepas pantai Onin, Palung Seram merupakan salah satu daerah target eksplorasi hidrokarbon di wilayah Indonesia Timur yang umumnya hanya tersedia data seismik. Data seismik tersebut dapat membantu dalam pengkajian geologi khususnya stratigrafi bawah permukaan melalui pendekatan stratigrafi seismik. Stratigrafi seismik merupakan penafsiran stratigrafi dari data seismik (Vail & Mitchum, 1997 dalam Sukmono, 1999) yang mana didalamnya terdapat pembahasan mengenai sikuen seismik dan fasies pengendapan. Penentuan sikuen seismik dan fasies pengendapan merupakan hasil dari penelitian ini yang bermanfaat untuk mempelajari prospek hidrokarbon. Sikuen yang dapat teridentifikasi berjumlah sembilan. Sikuen satu ekivalen dengan Batugamping Bogal yang didominasi fasies paparan, sikuen dua ekivalen dengan Serpih Yefbie yang didominasi fasies delta plain, sikuen tiga ekivalen Formasi Demu dan Serpih Lelinta yang didominasi fasies delta front, sikuen empat diinterpreatasikan ekivalen dengan Kelompok Facet dengan fasies proximal basin dan lower slope , sikuen lima ekivalen dengan Batu Gamping New Guinea Bawah dengan fasies paparan, sikuen enam ekivalen dengan Batu Gamping New Guinea Atas berkembang fasies paparan, sikuen tujuh ekivalen dengan sikuen transgresi berkembang fasies submarine canyon fill, sikuen delapan ekivalen dengan sikuen progradasional 1 berkembang fasies slope, sikuen sembilan ekivalen dengan sikuen progradasional 2 berkembang fasies marine (slope) onlap

geology especially Onin offshore areas, Seram Trough is one of the target areas of hydrocarbon exploration in eastern Indonesia are generally only available seismic data. The seismic data can assist in the assessment of subsurface stratigraphic through the seismic stratigraphic approach. eismic S stratigraphic is interpretation of stratigraphy from seismic data (Vail & Mitchum, 1997 in Sukmono, 1999) in which there is discussion of seismic sequence and depositional facies. etermination of s D eismic sequence and depositional facies are the result of this study which are useful for studying hydrocarbon prospects. Sequences which can be identifiable are nine. Sequence one is equivalent with Bogal Limestone which is dominated by shelf/platform facies, sequence two is equivalent with Yefbie Shale which is dominated by delta plain facies, sequence three is equivalent with Demu Formation and Lelinta Shale which is dominated by delta front, sequence four is interpretated with Facet Group which is dominated by proximal basin and lower slope facies, sequence five is equivalent with Lower New Guinea Limestone which is dominated by shelf/platform facies, sequence six is equivalent with Upper New Guinea Limestone which is dominated by shelf/platform facies, sequence seven is equivalent transgression sequence which developed submarine canyon fill facies, sequence eight is equivalent progradasional sequence 1 which developed slope facies, sequence nine is equivalent progradasional sequence 2 which developed marine (slope) onlap. facies

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