INVERSI FILTER Q UNTUK MENINGKATKAN FAKTOR KUALITAS DAN RESOLUSI DATA SEISMIK

• Main Authors: , KHRISTIAN ENGGAR PAMUJI, , Dr.rer.nat. Wiwit Suryanto M.Si selaku
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2012
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/101009/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=57432
• Institution: Universitas Gadjah Mada

Seismic waves travelling through media are attenuated by the conversion of elastic energy into heat. Upon being attenuated, the travelling wave changes: amplitude is reduced, travelling waveform is modified due to high-frequency content absorption, and phase is delayed. The effect of attenuation on seismic data can be reduced by applying inverse Q filter method. In this case study, Quality factor Q was determined by spectral ratio method, then it was used in inverse Q filter process. Synthetic seismic data generated by MATLAB (Seislab) program and real seismic data recording from NPRA (National Petroleum Reserve- Alaska) USGS Central Alaska was processed using this invers method. Using invers Q filter, quality factor of seismic data has improved. The value of Q improved from 176 to 984. Inverse method also increased resolution of seismic data.