Problems of Multiscale Brittleness Estimation for Hydrocarbon Reservoir Exploration and Development

Dubinya, N. V.; Bayuk, I.; Bakhmach, Milana

doi:10.3390/app12031134

Cited by 2 publications

(1 citation statement)

References 46 publications

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“…Fracture detection and characterization are very important in the context of oil/gas exploration and production [3,4]. As a result, analyses of fracture physical characteristics (scale, aperture, orientation) and their influences on seismic propagation have attracted considerable interest in academia and industry [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation and Calibration of the Galvin Model with Artificial Tight Sandstones with Controlled Fractures

Zhang

2023

Applied Sciences

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The study of fractures in the subsurface is very important in unconventional reservoirs since they are the main conduits for hydrocarbon flow. For this reason, a variety of equivalent medium theories have been proposed for the estimation of fracture and fluid properties within reservoir rocks. Recently, the Galvin model has been put forward to model the frequency-dependent elastic moduli in fractured porous rocks and has been widely used to research seismic wave propagation in fractured rocks. We experimentally investigated the feasibility of applying the Galvin model in fractured tight stones. For this proposal, three artificial fractured tight sandstone samples with the same background porosity (11.7% ± 1.2%) but different fracture densities of 0.00, 0.0312, and 0.0624 were manufactured. The fracture thickness was 0.06 mm and the fracture diameter was 3 mm in all the fractured samples. Ultrasonic P- and S-wave velocities were measured at 0.5 MHz in a laboratory setting in dry and water-saturated conditions in directions at 0°, 45°, and 90° to the fracture normal. The results were compared with theoretical predictions of the Galvin model. The comparison showed that model predictions significantly underestimated P- and S- wave velocities as well as P-wave anisotropy in water-saturated conditions, but overestimated P-wave anisotropy in dry conditions. By analyzing the differences between the measured results and theoretical predictions, we modified the Galvin model by adding the squirt flow mechanism to it and used the Thomsen model to obtain the elastic moduli in high- and low-frequency limits. The modified model predictions showed good fits with the measured results. To the best of our knowledge, this is the first study to validate and calibrate the frequency-dependent equivalent medium theories in tight fractured rocks experimentally.

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Section: Introductionmentioning

confidence: 99%

Experimental Validation and Calibration of the Galvin Model with Artificial Tight Sandstones with Controlled Fractures

Zhang

2023

Applied Sciences

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Evaluation of the Geomechanical Properties of Bashkirian Carbonate Rocks at the Tatarstan Republic for Optimization of Hydraulic Fracturing

Ziganshin,

Kolchugin,

Dautov

et al. 2023

Russian Journal of Earth Sciences

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Every year, the percentage of development of complex and unconventional hydrocarbon reservoirs is increasing, which is associated with the depletion of traditional oil and gas reserves. Carbonate reservoirs are hard-to-recover reservoir rocks due to the high degree of heterogeneity. A more detailed study of the lithological features and physical properties of carbonate rocks is an important and integral part of the complex reservoirs development. In the present work has done a comprehensive analysis of the lithological and geomechanical properties of the Middle Carboniferous strata deposits of the Dachnoye oil field, located in the southeast of the Republic of Tatarstan. The main attention in the research was focused on the estimation of the britleness of rocks. Britleness index is necessary for correct prediction of hydraulic fracturing. The result of the research is the identification of carbonate facies and their geomechanical characteristics, as well as the estimation of the britleness of rocks by various methods.

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Problems of Multiscale Brittleness Estimation for Hydrocarbon Reservoir Exploration and Development

Cited by 2 publications

References 46 publications

Experimental Validation and Calibration of the Galvin Model with Artificial Tight Sandstones with Controlled Fractures

Experimental Validation and Calibration of the Galvin Model with Artificial Tight Sandstones with Controlled Fractures

Evaluation of the Geomechanical Properties of Bashkirian Carbonate Rocks at the Tatarstan Republic for Optimization of Hydraulic Fracturing

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