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1-20 of 1553
Keywords: porosity
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Proceedings Papers
Complex Permittivity of Shale and Brine: Core Analysis Results and Interpretation
Available to Purchase
Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0007
... salinity electric field brine equation figure 9 porosity SPWLA 66th Annual Logging Symposium, May 17-21, 2025 DOI: 10.30632/SPWLA-2025-0007 COMPLEX PERMITTIVITY OF SHALE AND BRINE: CORE ANALYSIS RESULTS AND INTERPRETATION Seán Dolan1, Nishank Saxena2, Ronny Hofmann2 & Matthew Josh3. 1Shell...
Proceedings Papers
Petrophysical Characterization of Secondary Organic Matter and Hydrocarbons in the Early Jurassic Formation Using Laboratory NMR Techniques
Available to PurchaseAbdul Mohsen Al Mershed, Asmaa Al Hammadi, Hawraa Baqer, Mihira Narayan Acharya, Z. Harry Xie, Phil Hawley, Christie Woodroof, Seán Dolan, Matthias Appel
Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0009
... ABSTRACT The presence of solid bitumen in a deep carbonate reservoir formation (Kuwait) occludes primary inter-crystalline porosity and thus impacts permeability. Here we describe a petrophysical model to both quantify in situ solid bitumen and estimate the effect of this bitumen on reservoir...
Proceedings Papers
Real Time Data Inversion Uncertainty Estimation of NMR Logs
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0010
... ABSTRACT NMR log relaxation time distributions (T2 or T1) are essential for deriving petrophysical properties such as porosity and pore structure. However, their accuracy is often constrained by factors such as data quality, activation sequences, and inversion techniques. Traditional...
Proceedings Papers
Study of Rock Physical Properties Characterization Methods in Porous Media Using Ultra-Short Relaxation MRI
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0012
... calculation of the sample's internal porosity. Integrating this analysis with advanced mathematical statistical methods facilitates a thorough evaluation of the sample's internal pore structure and fluid distribution. Analyzing the T 1 spectra alongside imaging facilitates a direct assessment...
Proceedings Papers
Tortuosity Assessment for Reliable Permeability Quantification Using Integration of Hydraulic and Electric Current Flow in Complex Carbonates
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0013
... reservoir simulation geologist mineral rock type well logging permeability electrical tortuosity rock class university tortuosity reservoir characterization integration porosity workflow solid line flow in porous media log analysis hydraulic tortuosity annual logging symposium artificial...
Proceedings Papers
Impact of CO 2 Storage Time on the Physicochemical and Mechanical Properties of Sandstone Formations: Insights for Long-Term CCS Applications
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0025
..., are designed to simulate key early-stage interactions between CO2, rock, and fluid. A comprehensive suite of characterization techniques was employed to capture changes in the rock's physicochemical and mechanical properties. These techniques included Routine Core Analysis (RCA) to measure porosity...
Proceedings Papers
Production Estimation with Advanced Logging While Drilling Data in High Temperature Offshore Metamorphic Condensate Gas Reservoir
Available to PurchaseFangfang Wu, Peichun Wang, Lei Xiong, Renfeng Zhang, Shenzhuan Li, Xiao Gu, Jinlong Wu, Xin Zhou, Changwei Qu, Chandramani Shrivastava
Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0027
... was utilized for porosity evaluation and pore structure analysis. Ultimately, the petrophysical parameters, production logging data, and well production data were analyzed by using an artificial intelligence method to classify the reservoirs into three different groups and established a reservoir quality...
Proceedings Papers
Pore Network Characterization Utilizing LWD Acoustic Pore Aspect Ratio and NMR Rock Typing for Enhanced Well Placement
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0030
...) and porosity, and acoustic PAR provides an indicator of the effect of dolomitization on rock quality. Integration of these analyses indicates that dolomitization alters rock quality through changes to pore structure, including PAR, pore size, and porosity. The main objective of this study is to further test...
Proceedings Papers
3D Petrophysics: Applying Calibrated Anisotropic Rock Physics Model to the Acoustic Impedance and Vp Vs Ratio from Seismic Inversion to Estimate Porosity and Permeability
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0035
... continuous source of information for the inter-well spacing. Seismic inversion results, namely acoustic impedance and compressional to shear velocity ratio (Vp/Vs) provide hard data for the analysis. Required properties, such as total porosity, free fluid porosity and bounded water volume were estimated...
Proceedings Papers
High-Resolution Petrophysics Through the Integration of NMR Logs and Acoustic Image Logs
Available to PurchaseLucas Abreu Blanes de Oliveira, Gabriel do Nascimento Freitas, Leonardo Gonçalves, Erica Kato Pacheco Ferraz
Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0039
... ABSTRACT The estimation of permeability from well logs is a challenging task in formation evaluation. The models usually employed calculate permeability from a function of porosity. The average permeability of an interval will be underestimated when using low-resolution porosity logs, which...
Proceedings Papers
Didit Putra Kusuma, Umer Farooq, Hiroki Montani, Jiahong Li, Jawaher Alsabeai, Latifa Al Shamsi, Suad Alshamsi, Lu Lu, Nozomu Yoshida, Muhammad Nur Ali Akbar
Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0041
... a clear and robust correlation between the dissolution process and pore geometry structure, providing a solid foundation for the methodology. This is an additional equation for quantitatively specific surface area in the porosity-permeability relationship. This updated pore geometry-structure rock typing...
Proceedings Papers
Advanced Logging Techniques for Characterizing a Complex Turbidite Reservoir in the Norwegian Sea
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0044
... and permeability. To obtain a reliable interpretation, it was essential to have precise knowledge of reservoir characteristics, such as total porosity, permeability, connate water salinity, and Archie's coefficients (m and n). These properties play a vital role in defining water saturation and in predicting...
Proceedings Papers
Understanding the Heterogeneous Fractured Carbonate Reservoir by the Integration of Advanced Logging Techniques and Core Measurements, Case Study from Beibu Gulf Basin China
Available to PurchaseChen Ming, Gao Yong De, Qu Chang Wei, Yang Fu Lin, Sun Dian Qiang, Wu Jin Bo, Su Yuan Da, Li Shen Zhuan, Wu Jin Long, Yu Dai Guo
Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0056
... structure, and the oil accumulation spaces. Lastly, the geological model and geological evolution of this deep-buried carbonate reservoir were established for the first time. INTRODUCTION The carbonate reservoir, being deeply buried, exhibits strong heterogeneity, with porosity ranging from 1% to 10...
Proceedings Papers
Geosteering Based on Formation Dielectric Properties Derived from LWD Measurements
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0111
... underbalanced coil tubing drilling. As well known, various polarization mechanisms give rise to the dielectric effect at LWD frequencies and make the dielectric permittivity especially dispersive at this frequency range. In addition, formation porosities may be derived from wireline (WL) dielectric...
Proceedings Papers
Characterizing the Response of a New LWD Micro-Electrical Imager for Oil Based Mud and Large Boreholes in Terms of Formation Wave Impedance and Mud Properties
Available to PurchaseRoland Chemali, Jennifer Market, Lars Øy, Magne Lauritzen, Inge Bye, Heidi Rydningen, Thomas Mikuz, Carina Høie Østebø
Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0113
.... Because the reflection of the miniature radar echo is directly related to the impedance contrast between the OBM and the formation, it is natural to compute the wave impedance of the formation in terms of matrix permittivity, water-filled porosity, and water salinity. The traditional Archie's equation...
Proceedings Papers
Pore-Scale Modeling as an Alternative to Petrophysical Lacking Data: The Example of the Brazilian Pre-Salt
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0124
... of the components. For example, one can construct a rock with 60% calcite shrubs with an average radius of 200 micrometers and a standard deviation of 50 micrometers, with 30% dolomites among them, resulting in 10% inter-crystalline porosity. Subsequently, the calcite shrubs can be partially dissolved or replaced...
Proceedings Papers
Estimation of In-Situ Mineral and Fluid Composition of Rocks from the Joint Inversion of Triple-Combo Well Logs in the Presence of Invasion
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0128
... and the radius of invasion. In the second step, petrophysical properties (porosity, mineral/fluid composition, water saturation) are estimated through an interior-point method, jointly inverting both radial zones with consistent rock properties and variable fluid saturations. Once physical properties...
Proceedings Papers
Effect of CO 2 Sequestration on Carbonate Formation Integrity
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0131
... solubility in water was investigated by dissolving CO 2 in brine and then aging carbonate rock samples in the carbonated brine. The aging was conducted at 2,500 psi and 90°C for 1-, 3- and 6-month periods to simulate reservoir conditions. Petrophysical measurements of porosity, permeability, ultrasonic...
Proceedings Papers
Cost-Effective Geochemical Strategies for Optimizing Formation Evaluation and Property Prediction in Conventional and Unconventional Plays
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0133
... ABSTRACT Many large-scale studies have attempted to understand traditional key reservoir properties (e.g., porosity, oil saturation, water saturation) and formation-specific properties (e.g., carbonate, quartz, and clay content, key facies, etc.). The aim of these studies was to select...
Proceedings Papers
Saturation Height Models on Brazilian Pre-Salt Complex Carbonate Reservoir Rocks, from Pore to Field Scale Calculations
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Paper presented at the SPWLA 66th Annual Logging Symposium, May 17–21, 2025
Paper Number: SPWLA-2025-0134
..., with porosity as a trend variable, due to its excellent fit to experimental data and clarity in associating equation parameters with geometric properties of porous systems related to fluid saturation and distribution. Porosity, the petrophysical property with the lowest uncertainty propagation on 3D geological...
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