Search results for: Boris Gurevich

Items from 1 to 20 out of 54 results

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Processing of multi‐well offset vertical seismic profile data acquired with distributed acoustic sensors and surface orbital vibrators: Stage 3 of the CO2CRC Otway Project case study

Sinem Yavuz, Roman Isaenkov, Roman Pevzner, Boris Gurevich, more

Geophysical Prospecting > 69 > 8-9 > 1664 - 1677

Time‐lapse seismic reservoir monitoring is used as a way to gain insight into subsurface processes. Yet, the application of standard 4D technology onshore faces challenges, such as high cost, significant environmental footprint and, consequently, relatively infrequent surveys. As part of the Otway Project Stage 3 CO₂ injection study, continuous automated borehole‐based monitoring using distributed...

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Estimation of P‐wave anisotropy parameters from 3D vertical seismic profile with distributed acoustic sensors and geophones for seismic imaging in the CO2CRC Otway Project

Sofya Popik, Roman Pevzner, Andrej Bona, Konstantin Tertyshnikov, more

Geophysical Prospecting > 69 > 4 > 842 - 855

The quality and accuracy of a seismic image can be significantly affected by anisotropy. When anisotropy is significant, neglecting it can lead to smearing of the image, dispositioning of reflections and distortion of amplitudes. Thus, it is imperative to estimate anisotropy and take it into account, especially for long‐offset or wide‐azimuthal seismic data. This study estimates P‐wave anisotropy...

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Elastic properties of a reservoir sandstone: a broadband inter‐laboratory benchmarking exercise

Abdulwaheed Ògúnsàmì, Ian Jackson, Jan V.M. Borgomano, Jérôme Fortin, more

Geophysical Prospecting > 69 > 2 > 404 - 418

Low‐frequency forced‐oscillation methods applied to a reservoir sandstone allowed determination of the Young's modulus and Poisson's ratio (from axial loading), bulk modulus (by oscillation of the confining pressure) and shear modulus (from torsional‐forced oscillations) for comparison with conventional ultrasonic data. All tests were performed on a common sandstone core sample from an oil reservoir...

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Modeling elastic properties of Vycor glass saturated with liquid and solid adsorbates

Yongyang Sun, Boris Gurevich, Gennady Y. Gor

Adsorption > 2019 > 25 > 5 > 973-982

A combination of ultrasonic experiments with gas adsorption is a promising tool for improved characterization of nanoporous materials. The use of ultrasound requires understanding of the effects of adsorbates on the elastic properties of nanoporous medium. This issue is not trivial, because nanostructured materials, as well as nanoconfined matter, may exhibit physical properties that differ substantially...

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Water retention effects on elastic properties of Opalinus shale

Alexey Yurikov, Maxim Lebedev, Marina Pervukhina, Boris Gurevich

Geophysical Prospecting > 67 > 4 > 984 - 996

Shales play an important role in many engineering applications such as nuclear waste, CO₂ storage and oil or gas production. Shales are often utilized as an impermeable seal or an unconventional reservoir. For both situations, shales are often studied using seismic waves. Elastic properties of shales strongly depend on their hydration, which can lead to substantial structural changes. Thus, in order...

article

A triple porosity scheme for fluid/solid substitution: theory and experiment

Yongyang Sun, Boris Gurevich, Maxim Lebedev, Stanislav Glubokovskikh, more

Geophysical Prospecting > 67 > 4 > 888 - 899

Quantifying the effects of pore‐filling materials on elastic properties of porous rocks is of considerable interest in geophysical practice. For rocks saturated with fluids, the Gassmann equation is proved effective in estimating the exact change in seismic velocity or rock moduli upon the changes in properties of pore infill. For solid substance or viscoelastic materials, however, the Gassmann theory...

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Estimation of grain elasticity properties from ultrasonic measurements on dry granular pack

Mahyar Madadi, Zubair Ahmed, Andrej Bona, Maxim Lebedev, more

Geophysical Prospecting > 66 > 9 > 1726 - 1736

The elastic properties of crystalline rocks can be estimated from ultrasonic measurements on the powders of crushed rocks produced by the drilling process. To determine the elastic properties of grains from properties of powder packs, we study the dependence of their ultrasonic wave velocities on pressure. From this dependency, using the Hertz–Mindlin theory, we can calculate the effective ratio of...

article

How rough sea affects marine seismic data and deghosting procedures

Anton Egorov, Stanislav Glubokovskikh, Andrej Bóna, Roman Pevzner, more

Geophysical Prospecting > 66 > 1 > 3 - 12

Most seismic processing algorithms generally consider the sea surface as a flat reflector. However, acquisition of marine seismic data often takes place in weather conditions where this approximation is inaccurate. The distortion in the seismic wavelet introduced by the rough sea may influence (for example) deghosting results, as deghosting operators are typically recursive and sensitive to the changes...

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Effect of fracture fill on frequency‐dependent anisotropy of fractured porous rocks

Liyun Kong, Boris Gurevich, Yan Zhang, Yibo Wang

Geophysical Prospecting > 65 > 6 > 1649 - 1661

In fractured reservoirs, seismic wave velocity and amplitude depend on frequency and incidence angle. Frequency dependence is believed to be principally caused by the wave‐induced flow of pore fluid at the mesoscopic scale. In recent years, two particular phenomena, i.e., patchy saturation and flow between fractures and pores, have been identified as significant mechanisms of wave‐induced flow. However,...

article

Effects of fracture intersections on seismic dispersion: theoretical predictions versus numerical simulations

Junxin Guo, J. Germán Rubino, Stanislav Glubokovskikh, Boris Gurevich

Geophysical Prospecting > 65 > 5 > 1264 - 1276

The detection and characterisation of domains of intersecting fractures are important goals in several disciplines of current interest, including exploration and production of unconventional reservoirs, nuclear waste storage, CO₂ sequestration, and groundwater hydrology, among others. The objective of this study is to propose a theoretical framework for quantifying the effects of fracture intersections...

article

4D surface seismic tracks small supercritical CO2 injection into the subsurface: CO2CRC Otway Project

Roman Pevzner, Milovan Urosevic, Dmitry Popik, Valeriya Shulakova, more

International Journal of Greenhouse Gas Control > 2017 > 63 > C > 150-157

Time-lapse (4D) seismic monitoring of injected CO₂ in geological formations is being increasingly employed as the principal method for ensuring containment of the CO₂ and testing conformance of predicted plume behaviour. However, to bring further confidence in this method, the CO₂ volume detection limit in the seismic monitoring and key factors controlling it need to be quantitatively understood....

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Validating Subsurface Monitoring as an Alternative Option to Surface M&V - The CO2CRC's Otway Stage 3 Injection

Charles Jenkins, Steve Marshall, Tess Dance, Jonathan Ennis-King, more

Energy Procedia > 2017 > 114 > C > 3374-3384

Future CO₂ storage projects will require Monitoring and Verification (M&V) operations at the CO₂ storage site to understand the behavior of the CO₂ plume, including the assurance that leakage of the CO₂ has not occurred. Current surface based monitoring technologies may be unable to yield sufficient resolution or accuracy. CO2CRC, in conjunction with its Australian partners, is developing the...

article

Frequency dependence of anisotropy in fluid saturated rocks – Part I: aligned cracks case

Olivia Collet, Boris Gurevich

Geophysical Prospecting > 64 > 4 > 1067 - 1084

A major cause of attenuation in fluid‐saturated media is the local fluid flow (or squirt flow) induced by a passing wave between pores of different shapes and sizes. Several squirt flow models have been derived for isotropic media. For anisotropic media however, most of the existing squirt flow models only provide the low‐ and high‐frequency limits of the saturated elastic properties. We develop a...

article

Frequency dependence of anisotropy in fluid saturated rocks – Part II: Stress‐induced anisotropy case

Olivia Collet, Boris Gurevich

Geophysical Prospecting > 64 > 4 > 1085 - 1097

A major cause of attenuation in fluid‐saturated media is the local fluid flow (or squirt flow) induced by a passing wave between pores of different shapes and sizes. Several squirt flow models have been derived for isotropic media. For anisotropic media, however, most of the existing squirt flow models only provide the low‐ and high‐frequency limits of the saturated elastic properties. We develop...

article

Saturation scale effect on time‐lapse seismic signatures

Qiaomu Qi, Tobias M. Müller, Boris Gurevich

Geophysical Prospecting > 64 > 4 > 1001 - 1015

Quantitative interpretation of time‐lapse seismic signatures aims at assisting reservoir engineering and management operations. Time‐lapse signatures are thought to be primarily induced by saturation and pressure changes. Core‐flooding and reservoir flow simulations indicate that a change of the driving forces during dynamic fluid injection gives rise to a varying saturation scale. This saturation...

article

Laboratory measurements of the effect of fluid saturation on elastic properties of carbonates at seismic frequencies

Vassily Mikhaltsevitch, Maxim Lebedev, Boris Gurevich

Geophysical Prospecting > 64 > 4 > 799 - 809

A significant portion of the world's hydrocarbon reserves are found in carbonate reservoirs, yet analysis of the petrophysical properties of these reservoirs is associated with a number of challenges. Some of these challenges stem from physical and chemical interactions between the carbonate rock matrix and pore fluids, which can affect elastic properties of the rock. Hence, the study of the pore...

article

Case History: Using time‐lapse vertical seismic profiling data to constrain velocity–saturation relations: the Frio brine pilot CO₂ injection

Mohammed Al Hosni, Eva Caspari, Roman Pevzner, Thomas M. Daley, more

Geophysical Prospecting > 64 > 4 > 987 - 1000

CO₂ sequestration projects benefit from quantitative assessment of saturation distribution and plume extent for field development and leakage prevention. In this work, we carry out quantitative analysis of time‐lapse seismic by using rock physics and seismic modelling tools. We investigate the suitability of Gassmann's equation for a CO₂ sequestration project with 1600 tons of CO₂ injected into high‐porosity,...

article

A dual‐porosity scheme for fluid/solid substitution

Stanislav Glubokovskikh, Boris Gurevich, Nishank Saxena

Geophysical Prospecting > 64 > 4 > 1112 - 1121

Estimating the impact of solid pore fill on effective elastic properties of rocks is important for a number of applications such as seismic monitoring of production of heavy oil or gas hydrates. We develop a simple model relating effective seismic properties of a rock saturated with a liquid, solid, or viscoelastic pore fill, which is assumed to be much softer than the constituent minerals. A key...

article

Seismic monitoring of CO2 geosequestration: CO2CRC Otway case study using full 4D FDTD approach

Stas Glubokovskikh, Roman Pevzner, Tess Dance, Eva Caspari, more

International Journal of Greenhouse Gas Control > 2016 > 49 > C > 201-216

Stage 2C of the Otway project by CO2CRC Limited was designed as a feasibility study of seismic monitoring to detect and characterise small-scale leakage of CO₂-rich gas into a saline aquifer. Design of the monitoring program is based on a series of simulations conducted in 2007–2014. The gas plume is likely to be small in size and the contrast in elastic properties is also predicted to be relatively...

article

Effect of asperities on stress dependency of elastic properties of cracked rocks

Stanislav Glubokovskikh, Boris Gurevich, Maxim Lebedev, Vassily Mikhaltsevitch, more

International Journal of Engineering Science > 2016 > 98 > C > 116-125

Rocks are complex heterogeneous materials consisting of solid minerals and fluid-filled pore space. Sedimentary rocks often undergo significant continuous stiffening under stress. The main mechanism of this stiffening is an increase of the number of contacts between adjacent grains and asperities on opposite surfaces of cracks. We propose an analytical model for effective compliance of finite cracks...

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INFONA - science communication portal

Search results for: Boris Gurevich

Processing of multi‐well offset vertical seismic profile data acquired with distributed acoustic sensors and surface orbital vibrators: Stage 3 of the CO2CRC Otway Project case study

Estimation of P‐wave anisotropy parameters from 3D vertical seismic profile with distributed acoustic sensors and geophones for seismic imaging in the CO2CRC Otway Project

Elastic properties of a reservoir sandstone: a broadband inter‐laboratory benchmarking exercise

Modeling elastic properties of Vycor glass saturated with liquid and solid adsorbates

Water retention effects on elastic properties of Opalinus shale

A triple porosity scheme for fluid/solid substitution: theory and experiment

Estimation of grain elasticity properties from ultrasonic measurements on dry granular pack

How rough sea affects marine seismic data and deghosting procedures

Effect of fracture fill on frequency‐dependent anisotropy of fractured porous rocks

Effects of fracture intersections on seismic dispersion: theoretical predictions versus numerical simulations

4D surface seismic tracks small supercritical CO2 injection into the subsurface: CO2CRC Otway Project

Validating Subsurface Monitoring as an Alternative Option to Surface M&V - The CO2CRC's Otway Stage 3 Injection

Frequency dependence of anisotropy in fluid saturated rocks – Part I: aligned cracks case

Frequency dependence of anisotropy in fluid saturated rocks – Part II: Stress‐induced anisotropy case

Saturation scale effect on time‐lapse seismic signatures

Laboratory measurements of the effect of fluid saturation on elastic properties of carbonates at seismic frequencies

Case History: Using time‐lapse vertical seismic profiling data to constrain velocity–saturation relations: the Frio brine pilot CO₂ injection

A dual‐porosity scheme for fluid/solid substitution

Seismic monitoring of CO2 geosequestration: CO2CRC Otway case study using full 4D FDTD approach

Effect of asperities on stress dependency of elastic properties of cracked rocks

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