Pore-scale simulation and analysis of oil displacement in digital rocks has shown great promise in tracking oil recovery in porous media. This paper examines three digital rocks with varying pore and throat radii but the same porosities, studying their behavior under immiscible oil recovery through waterflooding. Computational fluid dynamics was used to conduct numerical simulations to observe...
Although the realm of water and gas injection within enhanced oil recovery has garnered considerable attention in the contemporary era, some engineers believe that alternative and cost-effective methods could play a more pivotal role in this field. Utilization of substances like surfactants and polymers is seen as an innovative technique that has made a substantial impact on the oil sector;...
In this study, numerical investigation of Richard’s equation of physiological liquids obeying power law rheological behavior has been investigated in partially double layered porous mediums based on effective viscosity concept. COMSOL Multiphysics has been selected to numerical solution of governing equations. Based on the obtained numerical results, the range of Reynolds number (which is...
This study focuses on the characterization of reservoir rock characteristics to improve hydrocarbon recovery, groundwater management, and geothermal energy extraction. Traditional methods for determining properties such as porosity, permeability, and pore size distribution are often labor-intensive and time-consuming. Instead, this research uses a pore network model to simulate and analyze...
This research delves into the transportation of micro-sized particles within a doublet pore model featuring two distinct pore throat sizes. To simulate a two-phase particle-fluid suspension, the CFD-DEM method is employed, combining the Navier-Stokes equation with Newton's second law of particle motion. Cohesion forces between particles and pore throats are characterized using the Simplified...
Heterogeneity in carbonate reservoirs, originating from various depositional, diagenetic, and fracturing processes, presents a significant challenge in identifying flow units and reservoir zonation. In this study, to identify the main productive units and understand the relationship between the pore nature and their role in development of different reservoir zones, core data and petrophysical...
Gas injection into oil reservoirs encounters several challenges, including the presence of nanopores, asphaltene precipitation, and adsorption of fluid molecules on the porous medium. Miscible gas injection has been shown to be the most efficient method in many cases. Therefore, estimating the minimum miscibility pressure (MMP) is crucial in this process. However, the presence of fluid in the...
Debris flows are comprised of water and loose sedimentary deposits that occur in mountainous regions as a result of intense precipitation. Due to the rapid speed and massive volume of these flows, rigid barriers are installed along the flow path to dissipate the energy of the flow and prevent damage to downstream infrastructures. Nevertheless, the efficiency of these barriers is significantly...
در این مطالعه، رسوب آسفالتین و رفع آن با استفاده از حلال تولوئن در مقیاس منفذی و نیز تأثیر آن بر پارامترهای پتروفیزیکی یک نمونه بستر شنی با استفاده از روش تصویربرداری میکرو سی تی مورد بررسی قرار می¬گیرد. برای این کار، یک سری آزمایش در سه مرحله تعریف شده است: مرحله اول قبل از ایجاد آسیب، مرحله دوم پس از آسیب و مرحله سوم پس از رفع آسیب می-باشد. پس از اتمام هر مرحله، نمونه مورد استفاده تحت...
Abstract
The ultimate objective of digital rock physics is to accurately predict rock properties. However, the resolution of rock images obtained from imaging techniques often involves a trade-off between image resolution and field of view (FoV) (Bai, Berezovsky et al. 2020, Sadeghnejad, Enzmann et al. 2021). The presence of heterogeneous rocks presents a significant challenge in accurate...
Understanding mass transport in fractured geological formations is crucial for various applications, including predicting contaminant migration, managing subsurface hydrology, sequestering CO2 to mitigate climate change, and potentially storing hydrogen for clean energy applications. This study presents a computational model using the eXtended Finite Element Method (X-FEM) to tackle the...
تغییر ترشوندگی سنگ مهم ترین اثر سیلاب¬زنی با آب مهندسی شده در نظر گرفته می¬شود اما بیشتر رویکردهای موجود برای مدلسازی تغییر ترشوندگی و افزایش بازیافت نفت توسط معیارهای ساده ای توصیف می¬شوند و معمولا نقش واکنش های ژئوشیمیایی موجود در هر فصل مشترکهای آب-نفت و نفت-سنگ را در این فرآیند نادیده می¬گیرند. این پژوهش با استفاده از رویکردی جدید بر اساس محاسبات ژئوشیمیایی، استفاده از مدل هایی مبتنی بر...
Academic researchers often face a dilemma when deciding whether to publish their new research as patents or articles, as the choice between the two options is influenced by various factors that may not always be clear to those in academia. This workshop covers a range of topics, such as the reasons for publishing research papers, the definition and purpose of patents, the requirements for...
In terms of geology and reservoir characteristics, carbonate reservoir rocks are very complex and heterogeneous due to the influence of diagenetic processes. This article studies the Fahliyan Formation oil reservoir in one of the largest hydrocarbon fields in southwestern Iran. Based on core data and petrophysical logs from two wells, the factors controlling the development of porosity and...
Using abandoned oil and gas wells as coaxial borehole heat exchangers paves the way for reusing these wells for geothermal energy extraction and low-carbon electricity generation. In this study, 150 different scenarios of such energy extraction processes have been modelled to examine the impact of inner tube’s insulation on the output energy. It is shown that, on average, the performance...
Improving oil recovery from reservoirs is an important challenge in the oil industry. In recent years, the use of ultrasonic waves to stimulate oil wells (reducing formation damage) and change the rheological properties of crude oil has received more attention. From the economic, environmental and operational safety perspectives, ultrasonic wave radiation has significant advantages over other...
Investigation of cigarette rod’s fluid behavior and flow regime has a high importance regarding the concerns of human health and environmental perspectives. The simulation study in the case of cigarette smoke can be performed in time-dependent calculations for tobacco part and stationary calculations for the filter part. In this study, the modeling was tried to be accomplished in the filter...
Determining residual oil saturation (Sor) in hydrocarbon reservoirs is crucial for reservoir evaluation and designing an enhanced oil recovery (EOR) method. Single-well chemical tracer test (SWCTT) is an efficient, economical, and accurate method for estimating Sor within approximately 20 to 30 meters around the well, providing valuable data for production optimization decisions. This...
گاز کربن دی اکسید یکی ازگازهای گلخانه‌ای مهم و اثرگذار در پدیده گرمایش جهانی است. یکی از روشهای کاهش اثرات گاز کربن دی اکسید بر روی اتمسفر و محیط زندگی انسان‌ها، دفن کردن این گاز در مخازن عمیق در زیرزمین می‌باشد. امروزه دفن گاز کربن دی اکسید در لایه‌های زیرزمینی یکی از رایج‌ترین و ضروری‌ترین روش‌ها برای جلوگیری از انتشار بی‌رویه این گاز به اتمسفر کره زمین تلقی میشود. از آن جایی که نفوذپذیری...
In recent years, a combination of different methods or several materials is used to increase the effectiveness of enhanced oil recovery. When the combination of low salinity water, surfactants and nanoparticles are used simultaneously, it could move more trapped oil and improve the oil recovery factor. Gamma-alumina and silica metal oxide nanoparticles were used because of their high...
درک دینامیک جریان هیدروژن و آب در آبده های زیرزمینی برای بهینه‌سازی قابلیت ذخیره‌سازی و بازیابی هیدروژن ضروری است. هدف این مقاله بررسی تأثیر توزیع ترشوندگی سنگ بر الگوی جریان، مکانیسم‌های به دام افتادن و کارایی بازیابی هیدروژن از طریق شبیه‌سازی‌های مستقیم دینامیک سیالات محاسباتی در مقیاس منفذ است. در این خصوص، با در نظر گرفتن توزیع ترشوندگی مختلف با استفاده از شبیه‌سازی عددی مستقیم و تکنیک‌های...
دولوميت‌هاي متخلخل عامل ايجاد لايه‌هاي فوق تراوا در سازندهاي پرمين-ترياس خلیج فارس
مهرانگيز نادري *؛ علي عظيم‌وند
چكيده
در مطالعه مغزه‌ها و مقاطع نازك بخش‌هاي دولوميتي سازندهاي كنگان و دالان مشخص گرديد كه دولومیت‌ها حاصل فرايندهاي دياژنزي هستند. در طي فرايندهاي دياژنزي تبديل كلسيت به دولوميت با كاهش حجم از طریق تشکیل تخلخل بین بلوری همراه و افزايش تخلخل را سبب شده است. از آنجایی که...
در این مقالھ روش جدیدی برای گسترش ترموھیدرولیکی ترک در محیط متخلخل غیراشباع ارائھ می شود.
براساس مدل ترموھیدرومکانیکی قبلی نگارندگان، ترک بھ عنوان سطح مشترکی در نظر گرفتھ می شود کھ با
معادلات تعادل کلی و بقای جرم و انرژی کوپلھ می شود. کوپلینگ ترک با محیط متخلخل باعث غیرخطی شدن
دستگاه معادلات حاصل می شود کھ از روش تکراری نیوتن-رافسون برای حل این معادلات استفاده می شود. با
شکست محیط و پیشروی...
Shallow landslides cause significant financial and human losses annually. Most previous studies have focused on large-scale mountainous slopes, investigating landslides in small-scale urban slopes requires analyzing two-phase flow under rainfall. Therefore, the aim of this study is investigating the effect of local artificial rainfall distribution due to irrigation on unsaturated flow in...
Most of the world's oil reservoirs are carbonate and are often in the secondary stage of production. Foam injection could be a highly effective method for improving displacement efficiency, increasing production rates, and enhancing oil recovery mainly by reducing issues like fingering and channeling during gas-injection based processes. In this study, a fractured carbonate reservoir was...
مسائل زیست محیطی همچون تغییرات اقلیم مرتبط با گرم شدن دمای زمین در اثر افزایش گازهای گلخانه‌ای ناشی از مصرف سوخت‌های فسیلی، چالشی اساسی برای ادامه حیات بشر است. تکاپوی محققان برای مقابله با این مساله باعث ایجاد راهکارهای جدید مانند ذخیره‌سازی زیرزمینی دی‌اکسید کربن، کربن صفر و گذار انرژی به سمت انرژی‌های تجدید پذیر شده است. در طی سالیان اخیر، ذخیره‌سازی هیدروژن به‌عنوان سوخت پاک و حامل انرژی...
چكيده
در این مقاله با حل همزمان قانون دارسی و معادله استوکس به محاسبه تراوایی نسبی سه فازی پرداختیم. برای انجام محاسبات ابتدا شبکه حفرات به هم پیوسته از داده سی تی اسکن استخراج و توزیع سیالات درون حفرات در جریان دو فازی پیش بینی شد. سپس با استفاده از معادلات پیوستگی و مومنتوم به محاسبه توزیع فشار هر یک از فاز ها در شبکه حفرات پرداخته شد. در ادامه، دبی جریان عبوری و فشار دیفرانسیلی پیرامون برش...
Investigating changes in the reservoir rock's pore system during multiphase flow studies in porous media is crucial, especially for processes like enhanced oil recovery, underground carbon dioxide storage, and wastewater disposal. Ignoring core heterogeneity in laboratory studies can significantly impact the results and their potential for upscaling to the reservoir.
In this study, 31...
In this research, two- and three-dimensional simulation of saturated and supersaturated steam injection process in the unsaturated zone of soil is carried out using some simplified assumptions via DuMux Simulator. The simulator is developed in the Department of Hydromechanics and Modeling of Hydrosystems (LH2), Institute for Modeling Hydraulic and Environmental Systems (IWS), Stuttgart...
In nature, sandy soils form the major part of alluvial sediments and wind-blown sands on the earth's surface. Examining the different behavioral and resistance characteristics of these types of soils is particularly important in geotechnical engineering. For this purpose, various static and dynamic tests are performed in laboratories using different devices and equipment. These tests can be...
"Persuasive Grant Writing" is your guide to using narrative tools that resonate with your funders. Elevate the quality of your grant applications, align your proposals with funder objectives, and apply narrative tools to make your applications more informative and persuasive.
Key Learning Points:
• Craft winning grant applications
• Create effective project budgets
• Design impactful...
Bubbly flow is one of the types of gas-liquid two-phase flow regimes, in which the gas phase is dispersed in the liquid phase in the form of small bubbles. This type of flow is usually observed at low gas velocities and high liquid velocities, and it can play an important role in the oil and gas industry. In bubbly flow, the gas bubbles tend to accumulate in the upper part of the pipe due to...
Nowadays, the study of fluid flow and transfer phenomena in porous media has received much attention due to its importance in industrial, engineering, biological and environmental applications. Geometry, cavity space and topology are among the key characteristics of porous media. These components play an important role in determining the characteristics of the porous medium. Image processing,...
Abstract:
In a world where crude oil resources are dwindling and the demand for energy is continuously rising, enhanced oil recovery (EOR) technologies have become critically important. while traditional production methods can only recover 30 to 40 percent of the oil present in reservoirs, advanced EOR technologies provide access to substantial amounts of the remaining oil. These...
Alkali metal lithium is recognized as one of the most important and highly valuable metals, utilized extensively in energy production and industry. Among the various sources for lithium extraction, such as seawater, hydrothermal clays, and pegmatites, geothermal brine reservoirs hold significant potential for lithium recovery. However, several challenges impede the development of lithium...
Abstract
This study addresses the analytical solutions for one-dimensional consolidation problems, focusing on classical problems fundamental to geomechanics. Two key problems are examined: Terzaghi’s consolidation problem and the loading by fluid pressure in a poroelastic medium. The analysis begins with revisiting Terzaghi’s consolidation theory under poroelastic conditions,...
In recent decades, the importance of addressing and understanding the behavior of unsaturated soils has increased due to the challenges of designing safe and cost-effective geotechnical structures based on the axioms of this scientific field. Therefore, this study conducts a bibliometric analysis of research conducted in the field of unsaturated soils in geotechnical engineering. For this...
The concept of using biological process in soil improvement, which is known as bio-mediated soil improvement, has shown more potential in geotechnical engineering applications in terms of performance and environmental sustainability. This article provides an overview of the soil microorganisms responsible for this process and the factors that affect their metabolic activities and compatibility...
This review examines the properties and applications of porous organic and inorganic materials in drug delivery systems. Porous organic materials, such as Poly(D,L-lactide-co-glycolide), (PLGA) and chitosan, are valuable due to their biocompatibility and biodegradability, and they are suitable for integration with biological tissues. In contrast, porous minerals such as silica and alumina...
In this research, a zirconium-based metal-organic framework (MOF-801) and its post-synthetically produced modified structure (Quasi-801) were used to access unsaturated metal centers as active catalytic sites for hydrogen gas production using sodium borohydride (NaBH4). For this purpose, the zirconium-based metal-organic framework was first synthesized in dimethylformamide (DMF) solvent. Then,...
The present study investigates the simulation of incompressible fluid flow of water using the OpenFOAM software in a porous medium. The solid phase is imported into the software via an ".stl" file format, and the solid region is extracted from the raw geometry utilizing the snappyHexMesh utility. To analyze the problem in two dimensions, a single cell layer is generated perpendicular to the...
The current research investigates the numerical simulation of incompressible two-phase flow of water and oil in a porous medium using the OpenFOAM software. The methodology for generating the porous geometry and grid study is explored. To facilitate a two-dimensional analysis, a single grid cell is constructed in the direction perpendicular to the planar domain. Subsequently, a water-oil...
This study investigated the effect of three different solvents including water, methanol, and ethanol on the structural properties and stability of metal-organic frameworks (MOFs) of ZIF-8 type. The synthesis of ZIF-8 was done using zinc nitrate and 2-methylimidazole in the mentioned solvents, and the characteristics of the synthesized materials were analyzed and compared by XRD, BET, FTIR,...
Digital rock physics, as a pioneering technology in characterizing porous structures by integrating state of the art tomographic imaging and advanced numerical simulations, extracts key rock properties such as permeability. However, limitations in imaging resolution and field of view (FOV) at the pore scale pose significant challenges. Direct numerical simulations at larger scales are either...
Lately, the increasing discharge of greenhouse gases from burning fossil fuels has brought irreversible environmental damage, and global warming has been triggered by this environmental problem. The greenhouse gases, particularly carbon dioxide, have become the primary reason for global warming. Consequently, carbon dioxide has become an environmental pollutant of a grave nature and deserves...
The transition to sustainable energy sources necessitates advanced technologies for efficient hydrogen and carbon storage. Pore-scale modeling plays a crucial role in understanding the intricate mechanisms within geological formations. This study explores the transformative potential of Large Language Models (LLMs) and Generative Artificial Intelligence (AI) in enhancing pore-scale modeling. A...
Multiphase flows in porous media are crucial in both industrial processes and natural phenomena, impacting hydrocarbon recovery, groundwater flow, catalysts, and fuel cells. Numerous experimental methods have been developed to study these issues, allowing for large-scale observation of dynamic interface behavior. However, accurately describing fluid flow at the pore scale remains challenging....
Many carbonate reservoirs of Iran's Bangestan Group have a tight and fractured matrix. Some of these reservoirs, despite having the conditions for the formation of a gas cap, do not benefit from the gravity drainage mechanism well due to the shortness of the matrices and high capillary pressure. Some of these reservoirs are very undersaturated, and their capillary pressure is usually higher...
In the 3D reconstruction of micro CT scan images of porous media for heterogeneous samples (with fractures), the texture of the heterogeneous (fracture) space differs from that of the rock. In this type of problem, a new method should be provided for reconstructing the porous media. Some shale rock samples exhibit fractures of this type, and their reconstruction is considered here. In this...
Section 1: Physics, instrumentations, and applications of Micro-CT scanners
This workshop introduces the basic physics, instrumentations and applications of Micro-CT scanners. Micro-CT provides micron-sized high-resolution 3D imaging information that cannot be obtained with other non-destructive technologies. This 3D reconstruction allows the user to see inside the object without destroying...
The presence of fractures in the fractured porous media requires the use of appropriate numerical methods to consider their effects. The conventional approach in simulating fracture reservoirs is to use the Warren and Root model which assumes a homogeneous medium. In reality, the presence of heterogeneous reservoirs with complex characteristics causes a large deviation in the results of the...
The current study focuses on pore-scale simulation and analysis of oil displacement in digital rocks, a novel approach for tracking and enhancing oil recovery in porous media. This research explores the impact of water flooding on oil recovery in three digital rock samples with identical porosity but varying morphologies. Utilizing computational fluid dynamics, numerical simulations were...
The advent of drug delivery systems has garnered considerable attention from researchers as a novel method for drug delivery. Among the advantages of such systems is the gradual release of drugs at a constant rate, which significantly reduces the frequency of drug administration and associated adverse effects.
This article aims to provide a comprehensive review of existing mathematical models...
از جمله رایج¬ترین مشکلات در صنعت نفت، تولید آب اضافی از چاه‌های نفتی است. این مسئله زمانی رخ می‌دهد که همراه با نفت، آب زیادی نیز از چاه خارج میشود. در بسیاری از موارد، این آب به میزان زیادی تولید میشود و عملاً به سیال اصلی تولیدی تبدیل میشود، که مشکلاتی چون افزایش هزینه‌های جداسازی آب و نفت، خوردگی تجهیزات و کاهش بازده اقتصادی تولید را به دنبال دارد. برای کاهش تولید آب، روشهای مختلفی وجود...
در این مقاله، به بررسی جامع سازه‌های متخلخل TPMS پرداخته خواهد شد. ابتدا به روشهای طراحی هندسی و استراتژی‌های کنترل عملکرد براساس نیازهای متنوع پرداخته میشود. سپس روشهای تولید افزایشی دقیق برای ساخت محصولات فیزیکی TPMS و در ادامه، کاربردهای چند رشته‌ای این سازه‌ها به منظور روشن ساختن مزایا و پتانسیل‌های بیشتر آنها مورد بحث قرار می‌گیرد. در نهایت، مشکلات موجود و چشم‌اندازهای تحقیقاتی...
در این پژوهش، یک روش همگنسازی چند مقیاسی جدید به منظور تحلیل فرآیند همبسته شیمیایی- مکانیکی- هیدرولیکی
در محیطهای متخلخل ارائه شده است. فرآیندهای شیمیایی- مکانیکی- هیدرولیکی و اثرات متقابل این فیزیکها نقش مهمی
در زمینههای مختلف از جمله مهندسی ژئوتکنیک دارند. روش پیشنهادی بر مبنای یک فرمولبندی دو مقیاسی با همگنسازی
مرتبه اول است. ناهمگنیهای موجود در مقیاس میکروسکوپی در نظر گرفته میشود، در...
در این پژوهش، کارایی چارچوب فلز-آلی ZIF-8 برای حذف رنگ‌های صنعتی از آب بررسی شده است. ZIF-8 به دلیل ویژگی‌های منحصر به فرد خود مانند سطح ویژه بالا، پایداری ساختاری مناسب و قابلیت استفاده مجدد مورد توجه در این کاربرد قرار گرفته است. آنالیزهای طیف سنجی مرئی- فرابنفش با استفاده از رنگ‌های متیلن‌بلو، متیل‌اورانژ و متیل‌گرین در شرایط مختلف pH انجام شده است. نتایج نشان داده است که ZIF-8 در محیط بازی...
زمین لغزش‌های ناشی از بارش باران یکی از مهمترین چالش‌های مهم طراحی و نگهداری زیرساخت¬های شهری و برون شهری است. بارش باران عمدتاً مقاومت برشی خاک را کاهش می‌دهد و در نتیجه زمین لغزش اتفاق می‌افتد. همچنین در حین چرخه‌های خشک و ترشوندگی هدایت هیدرولیکی و منحنی نگهداشت خاک آب تغییر پیدا می‌کند. این تغییرات به نحوهی در پایداری شیروانی‌ها تأثیر می‌گذارد. روشهای مختلفی از جمله میخکوبی و مهاربندی...
