Mokhammad Puput Erlangga, Wahyu Triyoso, Sigit Sukmono, Fatkhan, Pongga Wardaya, Erlangga Septama
This paper discusses an approach to apply Amplitude Variation with Frequency (AVF) attributes for identifying and mapping gas-saturation values (Sg) in low impedance sand reservoirs. Rock-physics modelling and analyses were done prior to application of the approach to the log and seismic data in the Sadewa field, Kutai Basin, Kalimantan, Indonesia. Cross-plot sensitivity analysis shows that the AVF attribute derived from near-angle stacked seismic data is correlated linearly to the gas saturation value with correlation coefficient 0.94. Comparison of AVO-based density and AVF-based gas saturation (Sg) maps show that the density map can give sand distribution, but not the gas saturation, as the density is affected by lithology and porosity. On the other hand, the AVF map can show gas saturation distribution, but not the lithology and porosity. Therefore, the density and AVF maps should be combined to get the complete distribution of lithology, porosity and gas saturation. © 2024 EAGE Publishing BV. All rights reserved.
Institut Teknologi Bandung, Indonesia; Institut Teknologi Sumatera, Indonesia; Pertamina Upstream Research and Technology Innovation, Indonesia
Research at a Glance
Register to unlock
Topics & SDG Alignment
Register to unlock
Collaboration
Register to unlock
Author Profile (Selected)
Register to unlock
References Overview
Register to unlock
Journal & Source
Register to unlock
Metadata & Integrity
Register to unlock