Discrimination of lithofacies in tight gas reservoir using field-specific rock physics modeling scheme. A case study from a mature field of middle Indus Basin, Pakistan

Consistency in the petrophysical and elastic properties is very critical for the characterization in low to intermediate (tight) porosity sandstone reservoirs. In this case study, we have applied an iterative and integrated workflow that provided consistency between the petrophysical and elastic pro...

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Bibliographic Details
Published in:Acta geophysica 2023-12, Vol.71 (6), p.2763-2780
Main Authors: Durrani, Muhammad Zahid Afzal, Rahman, Syed Atif, Talib, Maryam, Sarosh, Bakhtawer
Format: Article
Language:English
Subjects:
Aspect ratio
Case studies
Consistency
Cretaceous
Earth and Environmental Science
Earth Sciences
Effective medium theory
Elastic properties
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Iterative methods
Mineralogy
Modelling
P waves
Physics
Porosity
Quality assessment
Research Article - Applied Geophysics
Reservoirs
Rocks
S waves
Sandstone
Structural Geology
Well logs
Workflow
Citations: Items that this one cites
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Summary:Consistency in the petrophysical and elastic properties is very critical for the characterization in low to intermediate (tight) porosity sandstone reservoirs. In this case study, we have applied an iterative and integrated workflow that provided consistency between the petrophysical and elastic properties using rock physics modeling scheme for the quantitative characterization of the low to intermediate porosity reservoir of Cretaceous (Pab) sandstone reservoir of the mature field in middle Indus basin of Pakistan. Before petrophysics and rock physics modeling (RPM), the well logs data quality is assessed and conditioned. We employed an inclusion-based rock physics model to estimate elastic (P-wave, S-wave, and density) properties by accounting for the effect of mineralogy using pore geometry (pore aspect ratio) variation. The RPM provided consistent elastic and petrophysical properties when compared with measured logs and improved lithofacies understanding in the tight gas reservoir. Finally, modeled elastic properties and lithofacies are assessed and characterized in a rock physics template (RPT) using an effective medium theory. The successful application of the integrated workflow exterminated the well log interpretation uncertainty by providing a consistency between the petrophysics and RPM, which can be extended for improved reservoir characterization and prospect evaluation across other areas with similar geological trends and reservoir distribution.
ISSN:1895-7455
1895-6572
1895-7455
DOI:10.1007/s11600-023-01069-6