STRATIGRAFI PERAIRAN UTARA BALI DARI HASIL INTERPRETASI SEISMIK 2D

Deny Setiady, I Nyoman Astawa, Gusti Muhammad Hermansyah, I Wayan Lugra, Tumpal Bernhard Nainggolan

Abstract


Secara geografis daerah penelitian terletak pada koordinat 1140 32’ – 1160 01’ Bujur Timur dan 070 15’ - 080 02’ Lintang Selatan. Kondisi geologi dasar laut belum banyak dibahas oleh para peneliti di Perairan Bali Utara, karena kurangnya data seismik dan data sumur bor. Cekungan Jawa Timur di sebelah selatan dibatasi oleh busur vulkanik, sebelah timur dibatasi oleh Cekungan Lombok. Stratigrafi daerah penelitian dari tua ke muda terdiri dari formasi Prupuh, formasi Rancak, formasi Cepu, formasi mundu dan formasi Lidah. Metoda penelitian terdiri dari pengukuran navigasi, pengukuran kedalaman dasar laut, pengukuran seismik 2D serta kesebandingan data seismic dan bor. Tujuan penelitian adalah mengetahui pelamparan Cekungan Jawa Timur utara di Perairan Utara Bali. Dari hasil interpretasi dan korelasi antara data seismik dengan sumur bor, menunjukkan bahwa rekaman seismik 2D daerah telitian dapat dibagi menjadi enam (6) runtunan dengan urutan dari atas ke bawah adalah runtunan A, B, C, D, E, dan F.
Kata kunci:Data seismik 2D, interpretasi, Cekungan Jawa Timur, Perairan Utara Bali, Data bor

 

Geographically the research area lies within coordinates of 1140 32’ – 1160 01’ East and 070 15’ - 080 02’ South. The geological condition of the seabed has not been much discussed by researchers in the North Bali Waters, due to the lack of seismic and well data.The East Java Basin to the south is bounded by a volcanic arc, whereas the Lombok Basin on its eastward. Stratigraphy of research area consists of old to young Formation, i.e., Prupuh, Rancak, Cepu, Mundu and Lidah formation. Method consists of positioning, bathymetric, 2D seismic measurement, and compiled by seismic and well data.The purpose of this research is focused to distribution of the northern East Java Basin in North Waters of Bali. From the interpretation and correlation between the seismic and well data, they can divided by six (6) units from top to bottom are: A, B, C, D, E, and F.
Keywords: 2D seismic data, interpretation, east java basin, North Bali waters, well data


Keywords


Data seismik 2D; interpretasi; Cekungan Jawa Timur; Perairan Utara Bali; Data bor

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