Download or read book Experimental Study of Chemically Assisted Steam Flooding in Fractured Rocks for Enhanced Oil Recovery written by Hamad Abdullah Mohammed Al-Habsy and published by . This book was released on 2009 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Enhanced Oil Recovery written by Patrizio Raffa and published by Walter de Gruyter GmbH & Co KG. This book was released on 2019-07-22 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims at presenting, describing, and summarizing the latest advances in polymer flooding regarding the chemical synthesis of the EOR agents and the numerical simulation of compositional models in porous media, including a description of the possible applications of nanotechnology acting as a booster of traditional chemical EOR processes. A large part of the world economy depends nowadays on non-renewable energy sources, most of them of fossil origin. Though the search for and the development of newer, greener, and more sustainable sources have been going on for the last decades, humanity is still fossil-fuel dependent. Primary and secondary oil recovery techniques merely produce up to a half of the Original Oil In Place. Enhanced Oil Recovery (EOR) processes are aimed at further increasing this value. Among these, chemical EOR techniques (including polymer flooding) present a great potential in low- and medium-viscosity oilfields. • Describes recent advances in chemical enhanced oil recovery. • Contains detailed description of polymer flooding and nanotechnology as promising boosting tools for EOR. • Includes both experimental and theoretical studies. About the Authors Patrizio Raffa is Assistant Professor at the University of Groningen. He focuses on design and synthesis of new polymeric materials optimized for industrial applications such as EOR, coatings and smart materials. He (co)authored about 40 articles in peer reviewed journals. Pablo Druetta works as lecturer at the University of Groningen (RUG) and as engineering consultant. He received his Ph.D. from RUG in 2018 and has been teaching at a graduate level for 15 years. His research focus lies on computational fluid dynamics (CFD).
Download or read book Experimental Studies of Chemical Flooding in Enhanced Oil Recovery written by Shoja Shokofan and published by . This book was released on 2017 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to oil reserve depletion, drastic oil price reduction, and an increase in production cost, the oil industry is highly interested in increasing recovery to the highest proportion in existing fields. The application of chemical flooding in the oil industry is an emerging area to tackle these issues. Recent research studies have shown that sustained flooding may have the potential to solve or manage several problems in the upstream petroleum industry including enhanced oil recovery (EOR). EOR is important because of the global energy demand expected to be met by the oil and gas industry. Chemical flooding can alter several properties of oil rocks such as wettability alteration, interfacial tension, oil viscosity, and mobility ratio. These alterations are the advantages of using EOR methods. This work involves introducing different types of flooding and studying their effect on oil recovery. However, it should be considered that in some cases flooding may have a negative impact and cause the porous media to block, instead of improving oil recovery. 2D glass micromodel and sand pack column are employed in this study to evaluate quantitatively and qualitatively the efficiency of different flooding types. In the first phase of experiments, the 2D glass micromodel is introduced to study different chemical flooding in porous media qualitatively. In the second phase the sand pack column is engaged to investigate petrophysical properties alteration of porous media and EOR for different flooding processes. Laboratory experiments were implemented under ambient pressure and temperature. The experimental results revealed that the injection of Nanosilica emulsion provides the highest recovery compared with other flooding methods.
Download or read book Enhanced Oil Recovery Field Case Studies written by James J. Sheng and published by Elsevier Inc. Chapters. This book was released on 2013-04-10 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter first reviews thermal properties of rock and fluids and related energy concepts. The fundamentals of heat transfer and heat loss, theories to estimate the heated area and oil recovery performance are briefly presented. The mechanisms and screening criteria of steam flooding are discussed. After the general practice in steam flooding projects is discussed, field cases are presented which include Kern River in California, Duri steam flood in Indonesia, West Coalinga Field in California, Karamay Field and the Qi-40 block in Laohe, China.
Download or read book Experimental Investigation of Surfactant Flooding in Fractured Limestones written by Miguel Mejia (M.S. in Engineering) and published by . This book was released on 2018 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbonates are important candidates for enhanced oil recovery, but recovering oil from oil-wet fractured carbonate reservoirs is challenging. Waterflooding bypasses the rock matrix and recovers little oil. Chemical enhanced oil recovery using surfactants increases oil recovery by lowering the interfacial tension, changing the wettability, and generating viscous microemulsions that improve mobility control. Seven Texas Cream Limestone cores with a permeability of 15-30 md were fractured and saturated with 100% oil. The cores were aged for one week at 78 C to make them oil-wet. The fracture permeability was adjusted so that it was 10,000 times higher than the rock matrix by changing the confining stress. Waterflooding recovered an average of 6.5% of the original oil in place with an oil cut of less than 2% at the end of the waterfloods. Aqueous surfactant-alkali solution was injected after each waterflood. All of the surfactant floods produced oil cuts of more than 25% soon after injection started. Surfactant slugs of 3 PV, 1 PV and 0.3 PV followed by brine drives recovered 45, 44, and 30% of the remaining oil after the waterfloods. The 1 PV and 0.3 PV slug sizes were more efficient in terms of oil recovered for a given mass of injected surfactant. In both cases, a high salinity surfactant solution was injected to produce a viscous microemulsion in-situ. The viscous microemulsion increased oil recovery by promoting crossflow and improving mobility control. Low surfactant retention is vital for the economics of surfactant floods. The experiments show that using sodium hydroxide caused surfactant retention to be very low in fractured limestone cores. The average surfactant retention was 0.17 mg/g-rock. Decreasing the flow rate increased the oil recovery at a given injected pore volume. Thus changing practical design variables (salinity, surfactant slug size, flow rate) has a significant effect on oil recovery
Download or read book Fundamentals of Enhanced Oil and Gas Recovery from Conventional and Unconventional Reservoirs written by Alireza Bahadori and published by Gulf Professional Publishing. This book was released on 2018-08-18 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Enhanced Oil and Gas Recovery from Conventional and Unconventional Reservoirs delivers the proper foundation on all types of currently utilized and upcoming enhanced oil recovery, including methods used in emerging unconventional reservoirs. Going beyond traditional secondary methods, this reference includes advanced water-based EOR methods which are becoming more popular due to CO2 injection methods used in EOR and methods specific to target shale oil and gas activity. Rounding out with a chapter devoted to optimizing the application and economy of EOR methods, the book brings reservoir and petroleum engineers up-to-speed on the latest studies to apply. Enhanced oil recovery continues to grow in technology, and with ongoing unconventional reservoir activity underway, enhanced oil recovery methods of many kinds will continue to gain in studies and scientific advancements. Reservoir engineers currently have multiple outlets to gain knowledge and are in need of one product go-to reference. Explains enhanced oil recovery methods, focusing specifically on those used for unconventional reservoirs Includes real-world case studies and examples to further illustrate points Creates a practical and theoretical foundation with multiple contributors from various backgrounds Includes a full range of the latest and future methods for enhanced oil recovery, including chemical, waterflooding, CO2 injection and thermal
Download or read book Oil Recovery from Naturally Fractured Reservoirs by Steam Injection Methods Final Report written by and published by . This book was released on 1995 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oil recovery by steam injection is a proven, successful technology for nonfractured reservoirs, but has received only limited study for fractured reservoirs. Preliminary studies suggest recovery efficiencies in fractured reservoirs may be increased by as much as 50% with the application of steam relative to that of low temperature processes. The key mechanisms enhancing oil production at high temperature are the differential thermal expansion between oil and the pore volume, and the generation of gases within matrix blocks. Other mechanisms may also contribute to increased production. These mechanisms are relatively independent of oil gravity, making steam injection into naturally fractured reservoirs equally attractive to light and heavy oil deposits. The objectives of this research program are to quantify the amount of oil expelled by these recovery mechanisms and to develop a numerical model for predicting oil recovery in naturally fractured reservoirs during steam injection. The experimental study consists of constructing and operating several apparatuses to isolate each of these mechanisms. The first measures thermal expansion and capillary imbibition rates at relatively low temperature, but for various lithologies and matrix block shapes. The second apparatus measures the same parameters, but at high temperatures and for only one shape. A third experimental apparatus measures the maximum gas saturations that could build up within a matrix block. A fourth apparatus measures thermal conductivity and diffusivity of porous media. The numerical study consists of developing transfer functions for oil expulsion from matrix blocks to fractures at high temperatures and incorporating them, along with the energy equation, into a dual porosity thermal reservoir simulator. This simulator can be utilized to make predictions for steam injection processes in naturally-fractured reservoirs. Analytical models for capillary imbibition have also been developed.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993-10 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Fluid Solid Coupling Processes between Fractures and Porous Rocks Experimental and Numerical Investigation written by Shiming Wei and published by Frontiers Media SA. This book was released on with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic fracturing is the key measure for improving recovery of unconventional oil and gas reservoirs. Prediction of fracture morphology and productivity after fracturing is critical for fracturing design and optimization. The hydraulic fracturing process is to open porous rocks by artificially injecting highly compressed fluid, and the hydraulic fracture will be closed under the compaction of in-situ stress during the production process. In this regard, hydraulic fracturing and production processes are both fluid-solid coupling processes involving fractures and porous rocks. This Research Topic aims to gather the latest studies addressing how to improve the prediction accuracy of hydraulic fracturing morphology and post-fracturing productivity through experimental and numerical investigation. The experimental research shall underline hydraulic fracturing and fracture conductivity experiments and associated experimental methods, while the numerical research shall pay particular attention to discrete fracture network models, including the calculation efficiency and accuracy as well as the applicability.
Download or read book Enhanced Oil Recovery Field Case Studies written by James J.Sheng and published by Gulf Professional Publishing. This book was released on 2013-04-10 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enhanced Oil Recovery Field Case Studies bridges the gap between theory and practice in a range of real-world EOR settings. Areas covered include steam and polymer flooding, use of foam, in situ combustion, microorganisms, "smart water"-based EOR in carbonates and sandstones, and many more. Oil industry professionals know that the key to a successful enhanced oil recovery project lies in anticipating the differences between plans and the realities found in the field. This book aids that effort, providing valuable case studies from more than 250 EOR pilot and field applications in a variety of oil fields. The case studies cover practical problems, underlying theoretical and modeling methods, operational parameters, solutions and sensitivity studies, and performance optimization strategies, benefitting academicians and oil company practitioners alike. Strikes an ideal balance between theory and practice Focuses on practical problems, underlying theoretical and modeling methods, and operational parameters Designed for technical professionals, covering the fundamental as well as the advanced aspects of EOR
Download or read book Enhanced Recovery of Oil and Gas written by United States. Department of Energy and published by . This book was released on 1977 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Wettability Alteration in Naturally Fractured Carbonate Reservoirs written by Ali Goudarzi and published by . This book was released on 2011 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The demand for energy and new oil reservoirs around the world has increased rapidly while oil recovery from depleted reservoirs has become more difficult. Oil production from fractured carbonate reservoirs by water flooding is often inefficient due to the commonly oil-wet nature of matrix rocks. Chemical enhanced oil recovery (EOR) processes such as surfactant-induced wettability alteration and interfacial tension reduction are required to decrease the residual oil saturation in matrix blocks, leading to incremental oil recovery. However, improvement in recovery will depend on the degree of wettability alteration and interfacial tension (IFT) reduction, which in turn are functions of matrix permeability, fracture intensity, temperature, pressure, and fluid properties. The oil recovery from fractured carbonate reservoirs is frequently considered to be dominated by the spontaneous imbibition mechanism which is a combination of viscous, capillary, and gravity forces. The primary purpose of this study is to model wettability alteration in the lab scale for both coreflood and imbibition cell tests using the chemical flooding reservoir simulator. The experimental recovery data for fractured carbonate rocks with different petrophysical properties were history-matched with UTCHEM, The University of Texas in-house compositional chemical flooding simulator, using a highly heterogeneous permeability distribution. Extensive simulation work demonstrates the validity and ranges of applicability of upscaled procedures, and also indicates the importance of viscous and capillary forces in larger fields. The results of this work will be useful for designing field-scale chemical EOR processes.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enhanced Oil Recovery written by Vladimir Alvarado and published by Gulf Professional Publishing. This book was released on 2010-07-30 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enhanced-Oil Recovery (EOR) evaluations focused on asset acquisition or rejuvenation involve a combination of complex decisions, using different data sources. EOR projects have been traditionally associated with high CAPEX and OPEX, as well as high financial risk, which tend to limit the number of EOR projects launched. In this book, the authors propose workflows for EOR evaluations that account for different volumes and quality of information. This flexible workflow has been successfully applied to oil property evaluations and EOR feasibility studies in many oil reservoirs. The methodology associated with the workflow relies on traditional (look-up tables, XY correlations, etc.) and more advanced (data mining for analog reservoir search and geology indicators) screening methods, emphasizing identification of analogues to support decision making. The screening phase is combined with analytical or simplified numerical simulations to estimate full-field performance by using reservoir data-driven segmentation procedures. Case Studies form Asia, Canada, Mexico, South America and the United States Assets evaluated include reservoir types ranging from oil sands to condensate reservoirs Different stages of development and information availability are discussed
Download or read book Impact of Rock fluid Interactions on Chemical Enhanced Oil Recovery Mechanisms written by Mahdi Kazempour and published by . This book was released on 2012 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical enhanced-oil recovery has been proposed as an effective methodology to increase oil recovery. Chemical flooding at present consists of the injection of any chemical blend containing an alkali (A), a surfactant (S), a polymer (P) in a reservoir. Newer approaches have also been proposed or tried, including intelligent polymer injection. In spite of the maturity of chemical flooding, some of the ASP and AP recovery mechanisms are not completely understood, likely due to the complexity of these processes. The rheological behavior of the polymer in solution at reservoir conditions is a strong function of the chemical makeup of the rock-fluids system. The alkali agent in ASP, AS and AP flooding is a key component for success in the chemical treatment of oil-reservoirs and their high reactivity imposes complex selection and design constraints. Injection of alkaline and acidic solutions in reservoir leads to mineral dissolution and precipitation, possibly resulting in changes in permeability and porosity, and consequently altering solution pH and water chemistry. Accurate prediction of pH, acid and alkali consumption and aqueous chemistry are required to design suitable chemical blends in chemical flooding. Excessive consumption of alkali or acid agents can result in degradation of flood performance and lower than expected oil recovery. This research focuses on investigating rock-fluid interaction mechanisms in chemical flooding. In alkali flooding, the interaction of alkali agent with formation minerals (particularly anhydrite) and clays have been studied using state-of-the-art geochemical simulation and experimental evaluation. Moreover, a robust multiphase-multicomponent geochemical model has been built and evaluated for the case study of acid-pH sensitive polymer injection in sandstone. At the conclusion of this dissertation, extensive research has been carried out to find a promising ASP blend for challenging conditions of an oil-bearing formation in Wyoming. In addition, conditioned water has been designed to mitigate anhydrite dissolution under alkali conditions to enable chemical flooding methods in carbonate-rich reservoirs.
Download or read book Steam Flooding of Fractured Reservoirs written by Trond B. Jensen and published by . This book was released on 1991 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Chemical Enhanced Oil Recovery Core Flooding Processes with Special Focus on Rock Fluid Interactions written by Hendrik Födisch and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
