Jurnal Geofisika Eksplorasi
Vol 1, No 02 (2013)

STUDI PENCITRAAN STRUKTUR BAWAH PERMUKAAN BUMI MENGGUNAKAN PEMODELAN CONSTRAINED VELOCITY INVERSION DAN GRID BASED TOMOGRAPHY PADA LINTASAN GMR165 DI DAERAH TELUK CENDRAWASIH

Rizka, Gamal Muhammad (Unknown)



Article Info

Publish Date
10 Nov 2013

Abstract

  Prestack Depth Migration (PSDM) method has been applied to image the subsurface at Line GMR165 in Cendrawasih Bay. Imaging   and   positioning   is   the  most  important   issue   in seismic   data   processing.   In   the complex area case with lateral variation velocity , PSDM has more benefit than PSTM . It cause  the   ability   of   PSDM   method   that   can   focus just   for  one   reflector   when lateral velocity change.  In this study used constrained velocity inversion modelling method. This method is designed to make an initial interval velocity model for PSDM and updated in grid based tomography to got the best velocity so that the result had  continuous PSDM reflector with flat gather. That interval velocity applied to PSDM to get seismic image section and compared with PSTM (prestack time migration) seismic section based on it’s image and velocity model analysis. Seismic section of PSDM shows a significant image enhancement. It is able to assure the reflection pattern at the horizons with strong lateral velocity variations and makes image resolution more coherence than seismic section of PSTM. This study is very valuable to build exploration concept and development area, especially in a complex structure with strong lateral velocity variations.Keywords: Pre Stack Depth Migration, Constarined Velocity Inversion, Grid Based Tomography.  

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Journal Info

Abbrev

JGEO

Publisher

Subject

Earth & Planetary Sciences

Description

Jurnal Geofisika Eksplorasi adalah jurnal yang diterbitkan oleh Jurusan Teknik Geofisika Fakultas Teknik Universitas Lampung. Jurnal ini diperuntukkan sebagai sarana untuk publikasi hasil penelitian, artikel review dari peneliti-peneliti di bidang Geofisika secara luas mulai dari topik-topik ...