a) Geophysical Engineering Department, Institut Teknologi Sumatera
Jl. Terusan Ryacudu, Way Hui, Kecamatan Jati Agung, Lampung Selatan 35365
*mokhammad.erlangga[at]tg.itera.ac.id
b) Geophysical Engineering Department, Bandung Institute of Technology
Jalan Ganesha 10, Bandung 40132, Indonesia
c) Research and Development Centre For Oil and Gas Technology
Jl. Ciledug Raya No.Kavling 109, RT.7/RW.5, Cipulir, Kec. Kby. Lama, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12230
Abstract
Detection of the presence of saturated hydrocarbons in pores or rock fractures is a major problem in the field of exploration geophysics which is interesting to study. Some of the fluid saturation indicators were originally derived from the Zoepprit equation. However, the indicator that is derived from the linearization of the reflection coefficient is not influenced by frequency. In fact, frequency is a physical quantity that is very sensitive to the presence of fluid in a pore or rock fracture. Seismic waves will experience attenuation and dispersion when propagating through a porous medium or gas-saturated fractures.
Therefore, we need an indicator whose value is influenced by changes in the frequency of seismic waves. This indicator is an attribute of the velocity dispersion. In previous studies, the velocity dispersion attribute was used to detect the fluid content of gas in sandstone. Based on this research, it turns out that it shows effective results in mapping the presence of saturated gas zones in the carbonate pores. In the end, the results of this study will be able to map the presence of saturated gas zones in carbonate reservoir.
