Document Type : Original Research Paper

Authors

• Peyman Afzal ¹
• Sina Samadi ²
• Mehran Arian ²
• Ali Solgi ²
• Zahra Maleki ²
• Mohammad Seraj ²

¹ South Tehran Branch, Azad University

² Department of Earth Sciences, Science and Research Branch, Islamic Azad University

Abstract

An important work for fractured reservoir modeling and development of oilfields is the delineation of geomechanical attributes such as permeability. The main aim of this research work is detection of permeability zones in the Asmari reservoir of Gachsaran oilfield (SW Iran) based on mud loss data. The mud loss was 3D estimated by ordinary kriging method. Then, fractal number-size, concentration-volume, and concentration-distance to fault models were applied for permeability zone classification. The concentration-distance to fault fractal model shows three permeability zones, and the concentration-volume fractal modeling represents eight zones with an index multifractal behavior. Moreover, the number-size fractal analysis presented that a multifractal behavior with five societies. The correlation between the results obtained by these fractal methods reveals that the obtained zones have a proper overlap together. High value permeability zones based on the concentration-distance to fault and concentration-volume fractal models are began from 501 Barrel Per Day (BPD) mud loss, and 630 BPD obtained by the N-S modeling. Fractal modeling indicates that the permeability zones occur in the SW, NW and southern parts of the Gachsaran oilfield which can be the fractured section of the Asmari reservoir rock. Main faults from this oilfield are correlated with the permeability zones derived via fractal modeling.

Keywords

• Fractal modeling
• Concentration-distance to fault
• Concentration-volume
• Number-size
• Permeability

Main Subjects

• Hydrocarbon Resources