Analisis Parameter Gap Dalam Tahapan Dekonvolusi Prediktif Guna Mereduksi Short Period Multiple dan Meningkatkan S/N Ratio pada Pengolahan Data Seismik Refleksi 2D Marine

Authors

  • Bella Chintia Prodi Fisika, Fakultas MIPA, Universitas Tanjungpura, Jalan Prof. Dr. Hadari Nawawi, Pontianak, Indonesia
  • Okto Ivansyah Politeknik Negeri Pontianak
  • Joko Sampurno Jurusan Fisika, FMIPA, Universitas Tanjungpura

DOI:

https://doi.org/10.26418/positron.v7i1.20783

Keywords:

seismik refleksi, dekonvolusi prediktif, short-period multiple, reverberasi, gap (prediction distance)

Abstract

Penelitian ini bertujuan untuk menentukan nilai gap terbaik dari salah satu parameter gap yang digunakan untuk mereduksi short-period multiple dengan metode dekonvolusi prediktif. Variasi Nilai gap yang digunakan adalah 4, 8, 12, 16, 20, 24, 28, dan 64 ms. Berdasarkan hasil penelitian, diketahui bahwa gap 12 merupakan gap terbaik. Nilai gap 12 menghasilkan sp gather, penampang stack dan NTG (Near Trace Gather) yang lebih tajam dibandingkan dengan gap lainnya. Selain itu, dari spectrum analysis didapatkan sp gather dan penampang stack yang menunjukkan bahwa frekuensi terletak pada rentang nilai 10 - 80 Hz, dan nilai spectrum amplitude seismik yang terkecil berkisar -21 s.d 0 dB.

References

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Yilmaz O. 2001. Seismic Data Analysis Processing, Inversion, and Interpretation of Seismic Data Volume 1. Society of Exploration Geophysics . Tulsa (US).

Lines L. 1996. Suppression of Short Period Multiple – Deconvolution or Model Based Inversion ?. Canadian Journal of Exploration Geophysics. 32 (1):63-72.

Peacock KL, Treitel S. 1969 Predictive Deconvolution: Theory and practice. Geophysics. 63:155-169.

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Published

2017-05-14

Issue

Vol. 7 No. 1 (2017)

Section

Articles

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