Estimation of reservoir porosity using analysis of seismic attributes in an Iranian oil field

Soleimani, Fatemeh; Hosseini, Erfan; Hajivand, Farzad

doi:10.1007/s13202-020-00833-4

Cited by 15 publications

(8 citation statements)

References 20 publications

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“…It follows that the variability of acoustic impedance has underlying dependency on porosity. Acoustic impedance attributes and others, derived from seismic data are often used to estimate subsurface porosity distribution (Hampson et al 2001;Na'imi et al 2014;Soleimani et al 2020). In a stochastic reservoir modeling study presented in (Coburn et al 2006, p. 253), acoustic impedance is used to derive porosity trend maps for a carbonate reservoir.…”

Section: Discussionmentioning

confidence: 99%

An integrated modeling scheme for characterizing 3D hydrogeological heterogeneity of the New Jersey shelf

et al. 2022

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Continental shelves around the globe are hosts to vast reservoirs of offshore freshened groundwater. These systems show considerable complexity, often as a function of the geological heterogeneity. Data needed to characterise these systems are often sparse, and numerical models rely on generalized simplifications of the geological environment. In order to improve our understanding of these systems, it is necessary to implement modelling approaches that can produce large-scale geologically representative models using sparse data. We present an interdisciplinary stochastic modelling workflow incorporating borehole data, 2D depth-migrated seismic profiles, seismic attributes, and prior knowledge of the depositional setting. We generate a conditioned Gaussian field of porosity on the New Jersey shelf. We also perform a petrophysical conversion to a corresponding permeability distribution. The model dimensions are 134 km × 69 km × 1.7 km, with an adjustable resolution that can be adapted for process-based models of flow and solute transport. The integrated approach successfully translates small-scale porosity variations to a shelf-scale model that honors key characteristics of the New Jersey shelf wave-dominated depositional environment. The model was generated using open-source packages. All data and code to reproduce the complete workflow are provided along with this study so the model can be reproduced at any resolution for further studies of continental shelf processes offshore New Jersey.

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Section: Discussionmentioning

confidence: 99%

An integrated modeling scheme for characterizing 3D hydrogeological heterogeneity of the New Jersey shelf

et al. 2022

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“…It follows that the variability of acoustic impedance has underlying dependency on porosity. Acoustic impedance attributes and others, derived from seismic data are often used to estimate subsurface porosity distribution (Hampson et al, 2001;Na'imi et al, 2014;Soleimani et al, 2020). Most applications rely on very high correlation between attributes and well log data in order to directly derive porosity values.…”

Section: Discussionmentioning

confidence: 99%

An Integrated Modeling Scheme For Characterizing 3D Hydrogeological Heterogeneity of The New Jersey Shelf

Thomas¹,

Harten²,

Jusri³

et al. 2021

Preprint

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Continental shelves around the globe are hosts to vast reservoirs of offshore freshened groundwater. These systems show considerable complexity, often as a function of the geological heterogeneity. Data needed to characterise these systems are often sparse, and numerical models rely on generalized simplifications of the geological environment. In order to improve our understanding of these systems, it is necessary to implement modeling approaches that can produce large-scale geologically representative models using sparse data. We present an interdisciplinary stochastic modeling workflow incorporating borehole data, 2D depth-migrated seismic profiles, seismic attributes, and prior knowledge of the depositional setting. We generate a conditioned Gaussian field of porosity on the New Jersey shelf. We also perform a petrophysical conversion to a corresponding permeability distribution. The model dimensions are 134 km x 69 km x 1.7 km, with an adjustable resolution that can be adapted for process-based models of flow and solute transport. The integrated approach successfully translates small-scale porosity variations to a shelf-scale model that honors key characteristics of the New Jersey shelf wave-dominated depositional environment. The model was generated using open-source packages. All data and code to reproduce the complete workflow are provided along with this study so the model can be reproduced at any resolution for further studies of continental shelf processes offshore New Jersey.

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“…A zero-phase seismic wavelet of 200 ms and 18 HZ frequency is extracted from the cube to convert seismic reflection into acoustic impedance. After extracting the seismic wavelet, seismic data are correlated with the synthetic trace produced at the well location . The RMS error and correlation coefficient are calculated, and 82% correlation value is achieved.…”

Section: Materials and Methodsmentioning

confidence: 99%

Carbonate Reservoir Quality Variations in Basins with a Variable Sediment Influx: A Case Study from the Balkassar Oil Field, Potwar, Pakistan

Amjad

Ehsan

Hussain³

et al. 2023

ACS Omega

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The carbonate reservoir quality is strongly reliant on the compaction process during sediment burial and other processes such as cementation and dissolution. Porosity and pore pressure are the two main factors directly affected by mechanical and chemical compactions. Porosity reduction in these carbonates is critically dependent on the overburden stress and subsidence rate. A variable sediment influx in younger basins may lead to changes in the reservoir quality in response to increasing lithostatic pressure. Deposition of molasse sediments as a result of the Himalayan orogeny caused variations in the sedimentation influx in the Potwar Basin of Pakistan throughout the Neogene times. The basic idea of this study is to analyze the carbonate reservoir quality variations induced by the compaction and variable sediment influx. The Sakesar Limestone of the Eocene age, one of the proven carbonate reservoirs in the Potwar Basin, shows significant changes in the reservoir quality, specifically in terms of porosity and pressure. A 3D seismic cube (10 km2) and three wells of the Balkassar field are used for this analysis. To determine the vertical and lateral changes of porosity in the Balkassar area, porosity is computed from both the log and seismic data. The results of both the data sets indicate 2–4% porosities in the Sakesar Limestone. The porosity reduction rate with respect to the lithostatic pressure computed with the help of geohistory analysis represents a sharp decrease in porosity values during the Miocene times. Pore pressure predictions in the Balkassar OXY 01 well indicate underpressure conditions in the Sakesar Limestone. The Eocene limestones deposited before the collision of the Indian plate had enough time for fluid expulsion and show underpressure conditions with high porosities.

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Estimation of reservoir porosity using analysis of seismic attributes in an Iranian oil field

Cited by 15 publications

References 20 publications

An integrated modeling scheme for characterizing 3D hydrogeological heterogeneity of the New Jersey shelf

An integrated modeling scheme for characterizing 3D hydrogeological heterogeneity of the New Jersey shelf

An Integrated Modeling Scheme For Characterizing 3D Hydrogeological Heterogeneity of The New Jersey Shelf

Carbonate Reservoir Quality Variations in Basins with a Variable Sediment Influx: A Case Study from the Balkassar Oil Field, Potwar, Pakistan

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