Analisis Kecepatan Seismik Dengan Metode Tomografi Residual Moveout
DOI:
https://doi.org/10.25077/jfu.5.4.384-389.2016Abstract
Telah dilakukan analisis kecepatan menggunakan metode tomografi pada data seismik 3D Lapangan Y lepas pantai Texas dengan software Opendtect. Model kecepatan baru dibuat dengan mengoreksi kurva residual moveout (RMO) pada gather CIG (common image point) dengan menggunakan model kecepatan awal yang diperoleh secara konvensional sebagai masukan. Iterasi dilakukan sampai diperoleh kurva RMO yang datar. Selanjutnya model kecepatan baru yang dihasilkan melalui metode tomografi digunakan sebagai acuan nilai kecepatan untuk proses stacking dan migrasi. Penampang seismik hasil migrasi dengan nilai kecepatan baru menunjukkan peningkatan yang cukup baik. Struktur geologi yang berupa patahan dan pola-pola reflektor di kedalaman terlihat lebih jelas dibandingkan dengan penampang seismik awal.
Kata Kunci :tomografi, analisiskecepatan seismik, koreksi residual moveout
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Copyright (c) 2016 Imelda Murdiman, Elistia Liza Namigo
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