scholarly journals Simulation and Validation of Porosity and Permeability of Synthetic and Real Rock Models Using Three-Dimensional Printing and Digital Rock Physics

ACS Omega ◽  
2021 ◽  
Author(s):  
Ezdeen R. Ibrahim ◽  
Mohamed Soufiane Jouini ◽  
Fateh Bouchaala ◽  
Jorge Gomes
Keyword(s):  
Three Dimensional ◽  
Rock Physics ◽  
Three Dimensional Printing ◽  
Digital Rock Physics ◽  
Digital Rock ◽  
Porosity And Permeability ◽  
Dimensional Printing ◽  
Simulation And Validation

scholarly journals Variable secondary porosity modeling of carbonate rocks based on μ-CT images

2019 ◽  
Vol 11 (1) ◽  
pp. 617-626
Author(s):  
Xin Nie ◽  
Chi Zhang ◽  
Chenchen Wang ◽  
Shichang Nie ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Carbonate Rocks ◽  
Three Dimensional ◽  
Rock Physics ◽  
Carbonate Reservoir ◽  
Rock Properties ◽  
Secondary Porosity ◽  
Digital Rock Physics ◽  
Digital Rock ◽  
The Matrix ◽  
Physical Simulations

Abstract As an essential carbonate reservoir parameter, porosity is closely related to rock properties. Digital rock physics (DRP) technology can help us to build forward models and find out the relationship between porosity and physical properties. In order to prepare models for the rock physical simulations of carbonate rocks, digital rock models with different porosities and fractures are needed. Based on a three-dimensional carbonate digital rock image obtained by X-ray microtomography (μ-CT), we used erosion and dilation in mathematical morphology to modify the pores, and fractional Brownian motion model (FBM) to create fractures with different width and angles. The pores become larger after the erosion operation and become smaller after the dilation operation. Therefore, a series of models with different porosities are obtained. From the analysis of the rock models, we found out that the erosion operation is similar to the corrosion process in carbonate rocks. The dilation operation can be used to restore the matrix of the late stages. In both processes, the pore numbers decrease because of the pore surface area decreases. The porosity-permeability relation of the models is a power exponential function similar to the experimental results. The structuring element B’s radius can affect the operation results. The FBM fracturing method has been proved reliable in sandstones, and because it is based on mathematics, the usage of it can also be workable in carbonate rocks. We can also use the processes and workflows introduced in this paper in carbonate digital rocks reconstructed in other ways. The models we built in this research lay the foundation of the next step physical simulations.

Mechanical effects of rock cement alteration quantified using digital rock physics

2020 ◽  
Author(s):  
Maria Wetzel ◽  
Thomas Kempka ◽  
Michael Kühn
Keyword(s):  
Three Dimensional ◽  
Rock Physics ◽  
Mineral Dissolution ◽  
Rock Properties ◽  
Pore Filling ◽  
Porous Network ◽  
Digital Rock Physics ◽  
Digital Rock ◽  
Macro Scale ◽  
Cement Distribution

<p>Mineral dissolution is a micro-scale process, which may significantly alter the microstructure of rocks, and consequently affect their effective mechanical behavior at the macro scale. Predicting changes in rock stiffness is of paramount importance within the context of risk assessment for most applications related to geological subsurface utilization, where reduction of mechanical parameters is of particular relevance to assess reservoir, caprock and fault integrity [1].</p><p>In the present study, the effective elastic properties of typical reservoir rocks are determined based on micro-computer tomography (micro-CT) scans. The resulting three-dimensional rock geometry comprises a more realistic microstructure regarding the shapes of grains, cements and the overall porous network compared to available empirical approaches. Effective rock stiffness is calculated by a static finite element method, which imposes an uniform strain on the digital rock sample and calculates the resulting stresses. The effect of spatial cement distribution within the pore network is taken into account, considering passive pore filling as well as framework supporting cements. <span xml:lang="DE-DE" data-contrast="auto"><span>Rock </span><span>stiffness</span> <span>increases</span><span> due </span><span>to</span> <span>the</span> </span><span xml:lang="DE-DE" data-contrast="auto"><span>precipitation</span> </span><span xml:lang="DE-DE" data-contrast="auto"><span>of</span> <span>pore-filling</span> <span>minerals</span></span>. This quantitative approach substantially improves the accuracy in predicting elastic rock properties compared to general analytical methods, and further enables quantification of uncertainties related to spatial variations in mineral distribution.</p><p>[1] Wetzel M., Kempka T., Kühn M. (2018): Quantifying Rock Weakening Due to Decreasing Calcite Mineral Content by Numerical Simulations. Materials, 11, 4, 542. DOI: http://doi.org/10.3390/ma11040542</p>

scholarly journals ESTIMASI NILAI POROSITAS DAN PERMEABILITAS DENGAN PENDEKATAN DIGITAL ROCK PHYSICS (DRP) PADA SAMPEL BATUPASIR FORMASI NGRAYONG, CEKUNGAN JAWA TIMUR BAGIAN UTARA

2020 ◽  
Vol 5 (3) ◽  
pp. 34-44
Author(s):  
Benyamin Elilaski Nababan ◽  
Eliza Veronica Zanetta ◽  
Nahdah Novia ◽  
Handoyo Handoyo
Keyword(s):  
Digital Image ◽  
Rock Physics ◽  
Core Sample ◽  
Reservoir Rock ◽  
Present Calculation ◽  
Digital Rock Physics ◽  
Digital Rock ◽  
North East ◽  
Porosity And Permeability ◽  
Micro Tomography

Reservoir rock permeability and porosity are physical properties of rocks that control reservoir quality. Conventionally, rock porosity and permeability values are obtained from measurements in the laboratory or through well logs. At present, calculation of porosity and permeability can be calculated using digital image processing / Digital Rock Physics (DRP). Core data samples are processed by X-ray diffraction using CT-micro-tomography scan. The result is an image model of the core sample, 2D and 3D images. The combination of theoretical processing and digital images can be obtained from the value of porosity and permeability of rock samples. In this study, we calculated porosity and permeability values using the Digital Rock Physics (DRP) approach in sandstone samples from the Ngrayong Formation, North East Java Basin. The results of the digital image simulation and processing on the Ngrayong Formation sandstone samples ranged in value from 33.50% and permeability around 1267.02 mDarcy.

scholarly journals Digital Rock Physics: computation of hydrodynamic dispersion

2021 ◽  
Vol 76 ◽  
pp. 51
Author(s):  
Cyprien Soulaine ◽  
Laurence Girolami ◽  
Laurent Arbaret ◽  
Sophie Roman
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
Rock Physics ◽  
Volume Averaging ◽  
Longitudinal Dispersion ◽  
Hydrodynamic Dispersion ◽  
Digital Rock Physics ◽  
Digital Rock ◽  
Scientific Platform ◽  
Subsurface Engineering

Hydrodynamic dispersion is a crucial mechanism for modelling contaminant transport in subsurface engineering and water resources management whose determination remains challenging. We use Digital Rock Physics (DRP) to evaluate the longitudinal dispersion of a sandpack. From a three-dimensional image of a porous sample obtained with X-ray microtomography, we use the method of volume averaging to assess the longitudinal dispersion. Our numerical implementation is open-source and relies on a modern scientific platform that allows for large computational domains and High-Performance Computing. We verify the robustness of our model using cases for which reference solutions exist and we show that the longitudinal dispersion of a sandpack scales as a power law of the Péclet number. The assessment methodology is generic and applies to any kind of rock samples.

A novel fast disintegrating tablet fabricated by three‐dimensional printing

2009 ◽  
Vol 00 (00) ◽  
pp. 090730035508060-7
Author(s):  
Deng-Guang Yu ◽  
Chris Branford-White ◽  
Yi-Cheng Yang ◽  
Li-Min Zhu ◽  
Edward William Welbeck ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Fast Disintegrating Tablet ◽  
Dimensional Printing

Central ossifying fibroma of mandible

2020 ◽  
Vol 13 (12) ◽  
pp. e239286
Author(s):  
Kumar Nilesh ◽  
Prashant Punde ◽  
Nitin Shivajirao Patil ◽  
Amol Gautam
Keyword(s):  
Fibrous Tissue ◽  
Three Dimensional ◽  
Facial Asymmetry ◽  
Ossifying Fibroma ◽  
Mandible Reconstruction ◽  
Three Dimensional Printing ◽  
Osseous Lesion ◽  
Large Size ◽  
Dimensional Printing

Ossifying fibroma (OF) is a rare, benign, fibro-osseous lesion of the jawbone characterised by replacement of the normal bone with fibrous tissue. The fibrous tissue shows varying amount of calcified structures resembling bone and/or cementum. The central variant of OF is rare, and shows predilection for mandible among the jawbone. Although it is classified as fibro-osseous lesion, it clinically behaves as a benign tumour and can grow to large size, causing bony swelling and facial asymmetry. This paper reports a case of large central OF of mandible in a 40-year-old male patient. The lesion was treated by segmental resection of mandible. Reconstruction of the surgical defect was done using avascular fibula bone graft. Role of three-dimensional printing of jaw and its benefits in surgical planning and reconstruction are also highlighted.

scholarly journals Three-Dimensional Printing in Orthopedics: from the Basics to Surgical Applications

2021 ◽  
Author(s):  
Leandro Ejnisman ◽  
Bruno Gobbato ◽  
Andre Ferrari de França Camargo ◽  
Eduardo Zancul
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Dimensional Printing
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