PEMROSESAN DATA SEISMIK REFLEKSI UNTUK IDENTIFIKASI PERLAPISAN BATUBARA DI MANGUPEH KABUPATEN TEBO PROVINSI JAMBI

• Main Authors: , WAHYU SETYO HUTOMO, , Prof. Dr. Sismanto.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2014
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/129124/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=69502
• Institution: Universitas Gadjah Mada

Survey with shallow seismic reflection method has been carried out in Tebo regency, Jambi province on around December 2012, to generate seismic layering that can identify the presence of coal at a certain depth and describe the subsurface geology. The data are a 2D land reflection seismic data with seg-y format that will be processed with using ProMAX software. Seg-y data are combined with field geometry data in processing of header load, then is carried out noise reduction (trace editing and filtering), seismic signal amplification (deconvolution and TAR) and eliminating the influence of topography. Gather data are ready for velocity analysis by choosing the right velocity, and according to the semblance. Residual static correction is done to fix the reflector continuity in stack display. The final stage of the process above will produce velocity that will be migrated. The migration process is done to shift the position of the reflector to the actual position by using Post Stack Time Migration Method in order to obtain the final result of stacking seismic section. Seismic section at the time domain is converted into the depth domain for easy identification of the coal bedding and geological structure. At seismic section resulted, it can be seen layers of coal in several depths in accordance with previous geological studies, namely shallow drilling (coring) and outcrop on the surface. In seismic section, it also shows different geological structures such as shear fault structures.