Analisis Kecepatan Data Seismik 2D Menggunakan Metode Semblance pada Lapangan X Lepas Pantai Papua Nugini

Authors

  • Tri Ananda Komala Jurusan Fisika Universitas Andalas
  • Elistia Liza Namigo Jurusan Fisika Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.6.1.17-23.2017

Abstract

Telah dilakukan analisis kecepatan dengan menggunakan metode semblance pada data seismik 2D Lapangan X Papua Nugini. Software yang digunakan adalah software Geomage. Analisis kecepatan dilakukan pada tiga CDP (Common Depth Point) yaitu CDP 480, CDP 826 dan CDP 1740 yang dianggap memiliki pola semblance yang baik. Pola semblance yang baik didefinisikan sebagai pola semblance yang menunjukkan keteraturan nilai koherensi maksimum sehingga memudahkan proses pemilihan nilai kecepatan. Proses pemilihan nilai kecepatan dilakukan secara interaktif sampai lengkungan hiperbola sinyal refleksi berubah menjadi datar. Rentang nilai kecepatannya yang didapat pada CDP 1740 yaitu 1870,25 – 2230,40 m/s, CDP 480 yaitu 1650,32 – 2510,81 m/s, dan CDP 826 yaitu 1561,15 – 2617,53 m/s. Nilai kecepatan yang didapat akan digunakan untuk proses stacking dan migrasi. Hasil stacking dan migrasi menunjukkan respon yang baik dimana reflektor di kedalaman terlihat semakin jelas dan kebanyakan noise inkoherennya pun hilang.

 

Kata kunci: analisis kecepatan, Lapangan X Lepas Pantai Papua Nugini, metode semblance

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Published

2017-01-05

Issue

Vol. 6 No. 1 (2017)

Section

Articles

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Copyright (c) 2017 Tri Ananda Komala, Elistia Liza Namigo

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