Download or read book Experimental Study of Sweep Efficiency in Miscible Gas Injection Processes written by Edward J. Lewis and published by . This book was released on 2006 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simulation Study of Miscible Gas Injection for Gas Enriched Above the Minimum Miscibility Enrichment written by Harshad Champaklal Parakh and published by . This book was released on 2004 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Improvement of Sweep Efficiency in Gasflooding written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Miscible and near-miscible gasflooding has proven to be one of the few cost effective enhance oil recovery techniques in the past twenty years. As the scope of gas flooding is being expanded to medium viscosity oils in shallow sands in Alaska and shallower reservoirs in the lower 48, there are questions about sweep efficiency in near-miscible regions. The goal of this research is to evaluate sweep efficiency of various gas flooding processes in a laboratory model and develop numerical tools to estimate their effectiveness in the field-scale. Quarter 5-spot experiments were conducted at reservoir pressure to evaluate the sweep efficiency of gas, WAG and foam floods. The quarter 5-spot model was used to model vapor extraction (VAPEX) experiments at the lab scale. A streamline-based compositional simulator and a commercial simulator (GEM) were used to model laboratory scale miscible floods and field-scale pattern floods. An equimolar mixture of NGL and lean gas is multicontact miscible with oil A at 1500 psi; ethane is a multicontact miscible solvent for oil B at pressures higher than 607 psi. WAG improves the microscopic displacement efficiency over continuous gas injection followed by waterflood in corefloods. WAG improves the oil recovery in the quarter 5-spot over the continuous gas injection followed by waterflood. As the WAG ratio increases from 1:2 to 2:1, the sweep efficiency in the 5-spot increases, from 39.6% to 65.9%. A decrease in the solvent amount lowers the oil recovery in WAG floods, but significantly higher amount of oil can be recovered with just 0.1 PV solvent injection over just waterflood. Use of a horizontal production well lowers the oil recovery over the vertical production well during WAG injection phase in this homogeneous 5-spot model. Estimated sweep efficiency decreases from 61.5% to 50.5%. In foam floods, as surfactant to gas slug size ratio increases from 1:10 to 1:1, oil recovery increases. In continuous gasflood VAPEX processes, as the distance between the injection well and production well decreases, the oil recovery and rate decreases in continuous gasflood VAPEX processes. Gravity override is observed for gas injection simulations in vertical (X-Z) cross-sections and 3-D quarter five spot patterns. Breakthrough recovery efficiency increases with the viscous-to-gravity ratio in the range of 1-100. The speed up for the streamline calculations alone is almost linear with the number of processors. The overall speed up factor is sub-linear because of the overhead time spent on the finite-difference calculation, inter-processor communication, and non-uniform processor load. Field-scale pattern simulations showed that recovery from gas and WAG floods depends on the vertical position of high permeability regions and k{sub v}/k{sub h} ratio. As the location of high permeability region moves down and k{sub v}/k{sub h} ratio decreases, oil recovery increases. There is less gravity override. The recovery from the field model is lower than that from the lab 5-spot model, but the effect of WAG ratio is similar.

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 Equations of State and PVT Analysis written by Tarek Ahmed and published by Gulf Professional Publishing. This book was released on 2016-03-02 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the properties of a reservoir’s fluids and creating a successful model based on lab data and calculation are required for every reservoir engineer in oil and gas today, and with reservoirs becoming more complex, engineers and managers are back to reinforcing the fundamentals. PVT (pressure-volume-temperature) reports are one way to achieve better parameters, and Equations of State and PVT Analysis, Second Edition, helps engineers to fine tune their reservoir problem-solving skills and achieve better modeling and maximum asset development. Designed for training sessions for new and existing engineers, Equations of State and PVT Analysis, Second Edition, will prepare reservoir engineers for complex hydrocarbon and natural gas systems with more sophisticated EOS models, correlations and examples from the hottest locations around the world such as the Gulf of Mexico, North Sea and China, and Q&A at the end of each chapter. Resources are maximized with this must-have reference. Improve with new material on practical applications, lab analysis, and real-world sampling from wells to gain better understanding of PVT properties for crude and natural gas Sharpen your reservoir models with added content on how to tune EOS parameters accurately Solve more unconventional problems with field examples on phase behavior characteristics of shale and heavy oil

Download or read book Reservoir Formation Damage written by Faruk Civan and published by Elsevier. This book was released on 2011-08-30 with total page 1135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reservoir Formation Damage, Second edition is a comprehensive treatise of the theory and modeling of common formation damage problems and is an important guide for research and development, laboratory testing for diagnosis and effective treatment, and tailor-fit- design of optimal strategies for mitigation of reservoir formation damage. The new edition includes field case histories and simulated scenarios demonstrating the consequences of formation damage in petroleum reservoirsFaruk Civan, Ph.D., is an Alumni Chair Professor in the Mewbourne School of Petroleum and Geological Engineering at the University of Oklahoma in Norman. Dr. Civan has received numerous honors and awards, including five distinguished lectureship awards and the 2003 SPE Distinguished Achievement Award for Petroleum Engineering Faculty. Petroleum engineers and managers get critical material on evaluation, prevention, and remediation of formation damage which can save or cost millions in profits from a mechanistic point of view State-of-the-Art knowledge and valuable insights into the nature of processes and operational practices causing formation damage Provides new strategies designed to minimize the impact of and avoid formation damage in petroleum reservoirs with the newest drilling, monitoring, and detection techniques

Download or read book Gas Injection Methods written by Zhaomin Li and published by Gulf Professional Publishing. This book was released on 2022-09-24 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Enhanced Oil Recovery Series delivers a multivolume approach that addresses the latest research on various types of EOR. The second volume in the series, Gas Injection Methods, helps engineers focus on the latest developments in one of the fastest growing areas. Different techniques are described in addition to the latest technology such as data mining and unconventional reservoirs. Supported field case studies are included to show a bridge between research and practical application, making it useful for both academics and practicing engineers. Structured to start with an introduction on various gas types and different gas injection methods, screening criteria for choosing gas injection method, and environmental issues during gas injection methods, the editors then advance on to more complex content, guiding the engineer into newer topics involving CO2 such as injection in tight oil reservoirs, shale oil reservoirs, carbonated water, data mining, and formation damage. Supported by a full spectrum of contributors, this book gives petroleum engineers and researchers the latest research developments and field applications to drive innovation for the future. Helps readers understand the latest research and practical applications specific to foam flooding and gas injection Provides readers with the latest technology, including nanoparticle-stabilized foam for mobility control and carbon storage in shale oil reservoirs Teaches users about additional methods such as data mining applications and economic and environmental considerations

Download or read book Hydrocarbon Gas Injection for Improving Oil Recovery in Tight and Shale Oil Reservoirs written by Chao-Yu Sie and published by . This book was released on 2021 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enhanced Oil Recovery (EOR) in tight and shale oil reservoirs has been a difficult problem due to their high degree of heterogeneity and low to ultralow matrix permeability. Primary recovery factor from these reservoirs is generally lower than 10% of original oil in place (OOIP), which leads to the need for non-conventional technologies for EOR in these reservoirs. A thorough understanding of mass transfer processes in ultralow permeability porous media is required for successful designs of EOR projects in tight oil formations and shales. In this study, two advanced EOR methods that involve the reinjection of field gas into shale and tight oil reservoirs are investigated. In the first part of this dissertation, field gas huff-n-puff process as an EOR method for shales is systematically investigated using an optimal experimental design. For a better understanding of the mass transfer mechanisms in nano-sized pores, the effect of pressure program (i.e., pressure buildup and drawdown during a huff-n-puff cycle), reservoir and crude oil properties, solvent selection, and huff-n-puff cycle duration on oil recovery were investigated. The results show that thermodynamic phase behavior, molecular diffusion, and convection could be related to oil recovery factor, production rate, and produced oil composition, forming a conceptual model for natural gas huff-n-puff in shale reservoirs. The second part of this dissertation presents the investigation of a novel EOR method targeting water-sensitive tight formations with sub-10-mD permeability. Mobility control is crucial for high recovery efficiency in these tight oil reservoirs with high heterogeneity. Preferential flow in high permeability zones (or "thief zones") results in poor sweep efficiency. Conventional conformance control techniques such as polymer gels or even aqueous foam may not be suitable for water-sensitive, low-permeability reservoirs. Therefore, a novel concept of non-aqueous foam for improving field gas miscible displacement has been developed. This foam process involves the injection of a raw mixture of natural gas liquids (MNGLs) with non-condensable gas and a foaming agent, which could improve the sweep efficiency by the generation of non-aqueous foam and maximize the displacement efficiency due to the solubility between the crude oil and MNGLs. A specialty surfactant has been developed which could stabilize non-aqueous foam in MNGLs-crude oil mixture for in-situ foam generation. A pore-scale study of this foam process has been conducted using microfluidics to relate oil displacement to foaming mechanisms. The findings from this microscopic study have been validated using core flooding experiments on tight rocks. It can be concluded from both pore- and core-scale studies that the in-situ propagation of non-aqueous foam could be achieved for the first time and delay the injectant breakthrough, resulting in significant improvement of sweep efficiency

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 Quantitative Characterization and Engineering Application of Pores and Fractures of Different Scales in Unconventional Reservoirs Volume II written by Wenlong Ding and published by Frontiers Media SA. This book was released on 2023-04-05 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petroleum Abstracts written by and published by . This book was released on 1968 with total page 1692 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-06 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Advances in Geology and Engineering Technology of Unconventional Oil and Gas written by Yuwei Li and published by Frontiers Media SA. This book was released on 2022-09-21 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the International Petroleum and Petrochemical Technology Conference 2018 written by Scott. M. Shemwell and published by Springer. This book was released on 2018-11-02 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a compilation of selected papers from the 2nd International Petroleum and Petrochemical Technology Conference (IPPTC 2018). The work focuses on petroleum & petrochemical technologies and practical challenges in the field. It creates a platform to bridge the knowledge gap between China and the world. The conference not only provides a platform to exchanges experience but also promotes the development of scientific research in petroleum & petrochemical technologies. The book will benefit a broad readership, including industry experts, researchers, educators, senior engineers and managers.

Download or read book Chemical Enhanced Oil Recovery cEOR written by Laura Romero-Zerón and published by BoD – Books on Demand. This book was released on 2016-10-19 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Commercial application of chemical enhanced oil recovery (cEOR) processes is expected to grow significantly over the next decade. Thus, Chemical Enhanced Oil Recovery (cEOR): A Practical Overview offers key knowledge and understanding of cEOR processes using an evidence-based approach intended for a broad audience ranging from field operators, researchers, to reservoir engineers dealing with the development and planning of cEOR field applications. This book is structured into three sections; the first section surveys overall EOR processes. The second section focuses on cEOR processes, while the final section describes the electrorheology technology. These sections are presented using a practical and realistic approach tailored for readers looking to improve their knowledge and understanding of cEOR processes in a nutshell.

Download or read book Scale up of Miscible Flood Processes for Heterogeneous Reservoirs Final Report written by and published by . This book was released on 1996 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of a wide-ranging investigation of the scaling of gas injection processes are reported. The research examines how the physical mechanisms at work during a gas injection project interact to determine process performance. In particular, the authors examine: the interactions of equilibrium phase behavior and two-phase flow that determine local displacement efficiency and minimum miscibility pressure, the combined effects of viscous fingering, gravity segregation and heterogeneity that control sweep efficiency in 2- and 3-dimensional porous media, the use of streamtube/streamline methods to create very efficient simulation technique for multiphase compositional displacements, the scaling of viscous, capillary and gravity forces for heterogeneous reservoirs, and the effects of the thin films and spreading behavior on three-phase flow. The following key results are documented: rigorous procedures for determination of minimum miscibility pressure (MMP) or minimum miscibility enrichment (MME) for miscibility have been developed for multicomponent systems; the complex dependence of MMP's for nitrogen/methane floods on oil and injection gas composition observed experimentally is explained for the first time; the presence of layer-like heterogeneities strongly influences the interplay of gravity segregation and viscous fingering, as viscous fingers adapt to preferential flow paths and low permeability layers restrict vertical flow; streamtube/streamline simulation techniques are demonstrated for a variety of injection processes in 2 and 3 dimensions; quantitative scaling estimates for the transitions from capillary-dominated to gravity-dominated to viscous-dominated flows are reported; experimental results are given that demonstrate that high pressure CO2 can be used to generate low IFT gravity drainage in fractured reservoirs if fractures are suitably connected; and the effect of wetting and spreading behavior on three-phase flow is described. 209 refs.

Download or read book Miscible Displacement written by Fred I. Stalkup and published by . This book was released on 1983 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: