10.57647/j.ijes.2024.1604.20

A work flow for carbonate rock physics modeling: a log-base methodology

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  • Isti Nur Kumalasari*1,
  • Ignatius Sonny Winardhi2,
  • Rahmat Catur Wibowo1,
  1. Geophysical Engineering, Engineering Faculty, Universitas Lampung, Bandar Lampung, Lampung, Indonesia
  2. Exploration and Engineering Seismology Research Group, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Bandung, Indonesia

Received: 2023-11-03

Revised: 2023-12-22

Accepted: 2024-01-26

Published in Issue 2024-11-04

Copyright (c) 2024 Isti Nur Kumalasari, Ignatius Sonny Winardhi, Rahmat Catur Wibowo (Author)

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Kumalasari, I. N., Winardhi, I. S., & Wibowo, R. C. (2024). A work flow for carbonate rock physics modeling: a log-base methodology. Iranian Journal of Earth Sciences, 16(4), 1-10. https://doi.org/10.57647/j.ijes.2024.1604.20
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Abstract

Rock physics modeling plays an important role in determining the character of carbonate reservoirs.
Reservoir characterization in carbonate rocks is more complex because it has various types of
pores. Pore type analysis is very important for considering the analysis of seismic data and also
for considering the proper drilling technique. Pore type is generally estimated using thin section
data, but thin section data is not always available. Thus, in this paper we introduce a rock physics
modeling workflow in carbonate reservoirs using well log data. The well log data used in this
study located in Kujung I Formation, East Java Basin. To get the right elastic property model
of carbonate rock, the main thing that needs to be considered is the estimation of the mineral
matrix modulus and the aspect ratio with various approaches. By using a modified Kumar and Han
(2005) method, the aspect ratio of soft pore, reference pore, and stiff pore are 0.09, 0.177, and
0.506, respectively. The velocity modeling is done by using Kuster-Toks¨oz equation. The results
of the elastic properties modeling are close to the actual data. The correlation between the V p
Kuster-Toks¨oz and the actual V p are 0.9269. While the correlation between the Vs Kuster-Toks¨oz
and the actual Vs are 0.9803.

Keywords

  • Rock physics modeling,
  • Carbonate reservoir,
  • Elastic properties,
  • Pore type,
  • Aspect ratio
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