Digital rock physics is an innovative approach for computing the properties of rocks. As a versatile, advanced application it can be used to explore and comprehend the structures and properties of a range of materials. Digital rock physics for fast and accurate special core analysis in carbonates 205 calculated saturation exponent n for primary drainage displacement as a function of total porosity for the ecore models compared to available experimental data. About the authors jan dewar graduated from the university of alberta in 1981 with a b. The drp technique applied in this study employs the.
Velocity versus porosity left and dynamic and static bulk moduli. Imaging techniques for the analysis of porous structures have revolutionized our ability to quantitatively characterize geomaterials. The rock physics handbook distills a vast quantity. Digital rock analysis with ingrain services halliburton. When engineers can link rock characteristics with physical processes, they are given a physical basis in which to design the completions and eorior components needed for a fields development evolution. Start with a seismicpetrophysical model to derive optimal elastic properties for all lithologies including nonreservoirs.
Pdf permeability plays an important role to determine the. Avizo for materials science thermo fisher scientific us. Avizo digital rock analysis sandstone rock youtube. Rock physics models are combined with well log and prestack seismic data, sedimentological information, inputs from basin modelling and statistical techniques, to predict reservoir geology and.
Solid b solid a 0 p p a k pseudodry applied stress deformed body. We use segmented 3d images one for fontainebleau, three for berea, three for a carbonate, and one for a sphere pack to directly compute the absolute permeability, the electrical resistivity, and elastic moduli. This roughly divides digital rock technology into two parts. By understanding porescale rock features, we deliver qualitative and quantitative solutions to complex reservoir challenges.
In a standard digital rock physics workflow, a sample object is scanned, with microct typically producing the highestquality images. Meanwhile, digital rock physics drp has received attention as a possible future alternative to laboratory core analysis. Pergeos software for digital rock analysis thermo fisher. To start with, we need a representative 3d digital model of the rock, that has sufficiently high resolution in order to see the connectivity of the pore system, and contains a representative elementary volume rev of the rock. Survey of recent advances in digital rock physics benefits of drp and their application to reservoir characterization. Digital rock microstructure extracted from these high resolution images can be used to simulate coupled physics, which offer tremendous potential towards an improved understanding of physics at the porescale and beyond.
Rock physics basics static and dynamic moduli in sand. Avizo is the solution of choice for a range of materials science applications and settings. Textural descriptions, traditionally obtained via 2d petrographic analysis, are directly measured on 3d digital images of core material saadatfar et al. Evolution of permeability and microstructure of tight carbonates due. We used the binseparate function of the avizo fire soft. Figure 1 shows how we create our carbonate rock physics model on dry rock rock which not contained fluids. Pdf survey of recent advances in digital rock physics. Finally, 3d meshing of the digital coal model is carried out, and input to a multi physics coupled finite element suite.
Poromechanics investigation at porescale using digital rock physics laboratory conference paper pdf available january 2011 with 99 reads how we measure reads. Pdf effects of segmentation and skeletonization algorithms on. Avizo is an advanced 3d visualization and analysis software application for exploring and characterizing core samples and digital rock data sets. Offsetdependent reflectivitytheory and practice of avo analysis, 1993, p 5171, doi. Amiraavizo software pore network modeling extension.
Additionally, this module includes specific tools to quantify 2phase and 3phase fluids that can be seen in microct imaging. The rock physics handbook, second edition tools for seismic analysis of porous media the science of rock physics addresses the relationships between geophysical observations and the underlying physical properties of rocks, such as composition, porosity, and pore fluid content. Digital rock physics combines modern microscopic imaging with advanced numerical simulations for analysis of the physical properties of rocks, complementing laboratory investigations. Use full febased simulations with builtin solver or quick calculation of analytical bounds solid, laplace reduce effects of boundary conditions. Thermo scientific avizo software for materials science. The thermo scientific pergeos software package offers an adaptable modular architecture that is designed to allow new capabilities to be rapidly deployed as soon as they are developed. The key paradigm of digital rock physics drp image and compute implies imaging and digitizing the pore space and mineral matrix of natural rock and then numerically simulating various physical processes in this digital object to obtain such macroscopic rock properties as permeability, electrical conductivity, and elastic moduli.
Digital rock physics for fast and accurate special core. To understand the log data patterns in a discontinuous sandstone reservoir, newfield exploration engaged feis digital rock experts to conduct a porescale wettability study with a goal to optimize primary oil production as well as to increase secondary recovery from waterflooding. Castagna, j, m batzle, and t kan 1993, rock physics the link between rock properties and avo response. With highly efficient, interactive, and friendly software algorithms powered by avizo and comsol multiphysics, porous rock structure can be accurately extracted and numerical simulations can be conducted, based on which existing rock models can be. With tools ranging from standard visualization and measurement right through to quantification, advanced image processing, analysis and reporting. The dominant minerals for carbonate rocks are usually calcite. Pdf permeability estimation of porous rock by means of fluid. Supplements to digital rock physics benchmarks github. Quantify scanned rock samples with an easytouse software workflow. Abstract a pilot study to evaluate the quality and validity of special core analysis sca data from digital rock physics drp has provided results that are comparable to laboratory measurements. The company specialises in the application of seismic technologies to decision making in exploration and production and particularly in the application of rock physics to seismic interpretation.
Selected cub samples were prepared into polished thinsections 30 m thick for xrf elemental mapping and xanes at the celiii edge on identified ce hotspots at the stanford synchrotron radiation lightsource. The figure below shows the image for numerical computation of the. Ingrain integrated digital and physical core analysis provides a robust understanding of reservoir quality. In specific cases, it provides important insights into the interaction of porous rocks and the fluids that flow through them that would be impossible to glean in the lab. There is an amazing mix of old and new such as the historical great wall and the inspiring the birds nest.
Digital rock physics core analysis using digital technology. Shale is a wide variety of rocks that are composed of extremely finegrained particles. More info about avizo fire for digital rock physics. Jan is currently working with scott pickford in calgary, with a special enthusiasm for communicating technical concepts including avo, inversion, modeling, vsp and transfer filter processing, rock physics, and just about anything else that can be puzzling to the average bear. We invite abstracts for the following topics oral and posters. Poromechanics investigation at porescale using digital.
This document discusses the rock physics templates rpt, and how we have implemented the rpt approach in the hampsonrussell software release hrs9. An example of the grain partitioning of the sandstone sample is given in figure 1. Rock physics for reservoir surveillance influence of fluid flow and saturation avo and rock physical properties stress, fractures, and micro seismicity current industry practice combination of laboratory experiments and digital rock techniques rock physics for conventional oil and gas. Scanners reconstruct image projections to create a stack of images that can be exported in different formats, such as bmp, tif, or png, which then somehow need to be transformed so that the properties of the core. For numerical experimentation to find its way into the mainstream, it has to be practical and easily repeatable, i. A theoretical rock pore material substitution model is validated with a digital rock physics framework. Digital rock, pioneers in digital rock for the oil and gas. Most lab equipment for porosity and permeability testing cannot handle rocks larger than a few centimeters. Thermo scientific avizo software provides a reliable, fully automatable, customizable and easytouse solution allowing you to innovate faster, and produce more reliable and better performing materials. This condition reduces the feasible size of a digital sample to just a few grains across. Avizo offers a large set of segmentation tools, ranging from purely manual to fully. Mar 18, 2016 this is just a basic overview of the different workspaces in pergeos.
Keywords digital rock physics computed microtomography permeability. Materials science electronics digital rock physics. While thermo fisher scientific has been a leader in industries such as electronics, life sciences, and materials science, we are also pioneers in digital rock for the oil and gas industry. This relationship is a key indication of hydrocarbon storage and. Measures of isotropic elasticity in a physical test on a real rock, the stress is applied externally, and the deformation is. Poromechanics investigation at porescale using digital rock physics laboratory, by s zhang. Interpreter can estimate seismic responses by rock physics modeling and evaluate the effect of. In this measurement method, highresolution digital images of the rock pores and mineral grains of selected reservoir core samples are made and analyzed.
Integrated petrophysics and rock physics modeling is important to understand lithology, porosity and fluid effect in different scenarios and can improve reservoir characterization. Through computer simulations, new insights into the processes going on in the rocks are retrieved and will help to understand the causes for uncommon behavior of hydrocarbon reservoirs. Geo expro simplifying digital rock physics workflows. Digital rock physics and laboratory considerations on a high.
Digital rock physics combines microtomographic imaging with advanced numerical simulations of effective material properties. Users guide avizo software 2019 thermo fisher scientific. By ct scanning a rock core, digital representations of the sample can be captured, and used to create digital rock physics models. Petrophysics and rock physics modeling to improve seismic. Evaluation and application of digital rock physics drp. Fatkhan, fourier dzar eljabbar latief 2014 digital rock physics application.
Avizo wind 3d analysis software for simulation data. Digital rock physics combines modern microscopic imaging with advanced numerical simula. Digital rock physics helps scientists understand porous media. Rock permeability has been regarded as a key parameter, and the accurate determination of rock permeability is essential for various engineering fields, including oil and gas industry, geotechnical and geological engineering. These new approaches, in the meanwhile, introduce significant new challenges. Rock physics associates is a ukbased independent consultancy and training business to the oil and gas industry run by dr rob simm. Permeability estimations of the porous rock properties of. Mechanical properties and flow properties from nanotomography to whole core scale analysis.
Pdf poromechanics investigation at porescale using digital. As with many fields, computing is changing how geologists conduct their research. Evaluation and application of digital rock physics drp for. We are working on, derives generic pore filling theory. Software, ranging from acquisition and imaging automation. The method is based on theory proposed by dvorkin and nur 1996 and odegaard and avseth 2003. Digital rock analysis example with a sandstone rock video. Thermo fisher scientifics oil and gas business, featuring digital rock technology and solutions, informs economic decisions by providing new insights into mechanisms that control reservoir flow throughout the lifecycle of the asset.
Because of this inbuilt flexibility, pergeos provides the user with an adaptive environment, perfectly suited for a range of daily interactions with core samples. Digital representations of rock from ct images and physics modeling based on these pore structures provide the opportunity to further advance our quantitative understanding of fluid flow, geomechanics, and geochemistry, and the e mergence of coupled behaviors. Experimental rock mechanics testing rmt program numerical modeling of flow properties numerical modeling of mechanical properties monday, may 23, 2016 digital rock physics. Computational permeability determination from pore. Rock physics for the rest of us an informal discussion.
Open inventor and the meshviz xlm extension are the underlying visualization technology in avizo wind. The first step is using a mixing law the voigtreusshill average to mixed the minerals which are present in the rock. Ct scanners produce 3d highresolution images of micropore structures of rock samples, which can be used in digital rock physics drp. These include home, editing, filtering, segmentation, analysis, modeling, registration, visualization, and scripting. The avizo software is used to quantify and characterize the pore structure of the digital coal model, and the equivalent pnm is extracted. Shakibayeva 1jsc tandem, 625000, 57 republic street, tyumen, russian federation 2geochemical laboratories in tyumen. Any digital rock physics calculation should address these issues of resolution and anisotropy, which may a ect its accuracy, even when the microgeometry is realistic.
Poromechanics investigation at porescale using digital rock. We will show the equations and the concepts behind the theory using graphical methods. Pdf networks of large pores connected by narrower throats pore networks are essential inputs into network. Rock physics is a key component in oil and gas exploration, development, and production. Xray microcomputed tomography microct is among the emerging techniques used for digital rock physics. As for the calculation of the elastic properties were taken from andrea et. Digital rock encompasses a multidisciplinary approach involving advanced microscopy and physics combined with geology, geochemistry, petrophysics, and petroleum engineering to understand the porescale microstructure of reservoir rock. Digital rock physics complements the laboratory and field work that geologists, petroleum engineers, hydrologists, environmental scientists, and others traditionally rely on.
Therefore, in this study, we took a digital rock physics approach that. Fractured bedrock hydrogeologic characterization using. Software application for automated acquisition of high. Digital rock physics and laboratory considerations on a highporosity. This is the second and final part of our digital rock physics drp benchmarking study.
Digital rock physics is also referred to as digital core analysis. Further the model virtually undergoes with coreflooding techniques with the use of advanced software to estimate experimental. Using ct scans to compute rock properties article pdf available in ieee signal processing magazine 352. Digital rock physics drp is to numerically solve transport equations on digital representations of rock samples. Shale gas characterization and property determination by. The paradigm of digital rock physics is imageandcompute. Build rock physics models and calibrate them to well data. Conventional rock physics isbased on theoretical andor empirical relations under some assumptions and laboratory measurements. Then, digital rock petrophysics drp has been adopted to obtain those. Ct225kvfcb ct test analysis system is used to scan the samples.
One advantage of rock physics models is the ability to work with intact scanned cores. Xscreen and xteam enable collaborative, highresolution and immersive environments. Solving for stress allows for the calculation of the overall elastic properties in. Rock physics integrating petrophysical, geomechanical. These images are usually 3d digital xray microtomographic images. Unconventional shale reservoirs differ largely from conventional sandstone and carbonate reservoirs in their origin, geologic evolution and current occurrence. Drp includes ct scanning of reservoir cores to generate a virtual petrophysical model. It is used to complement laboratory investigations with the aim to gain. Image enhancement and segmentation steps were carried out using the commercial software package avizo fire version avizo fire 9. Supplements to digital rock physics benchmarks authors. Starting from digital imaging data, the paper introduces an imagetosimulation framework.
Digital energy journal vsg launches version 7 of 3d rock. In 20, we acquired vsg visualization sciences group, the leading provider of 3d software applications and. We know from laboratory work and theory that poor sorting can also in. This new approach establishes the relationship between bulk rock properties and multiscale image analysis for a more holistic understanding of the effective rock properties. Tang department of geological sciences the university of texas at austin abstract here i solve for the stresses in a shale sample after applying a strain by using a digital rock physics approach. Image processing is performed with the commercial software avizo to. Rock physics associates consultancy and training for oil. Software application for automated acquisition of high resolution 3d images by milling and imaging serial sections with dualbeam system. Rock physics integrating petrophysical, geomechanical, and seismic measurements. Microanalysis of rare earth elements in coal utilization. Digital rock physics modeling is useful to understand microstructural parameters of rocks pores and rock matrks, quite quickly and in detail. Digital rock provides predictive insight to oil recovery. Validate it in a similar framework but with more complex physics, e.
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