Download or read book HIGH RESOLUTION PREDICTION OF GAS INJECTION PROCESS PERFORMANCE FOR HETEROGENEOUS RESERVOIRS written by and published by . This book was released on 2001 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report outlines progress in the first quarter of the second year of the DOE project ''High Resolution Prediction of Gas Injection Process Performance for Heterogeneous Reservoirs''. The application of the analytical theory for gas injection processes, including the effects of volume change on mixing, has up to now been limited to fully self-sharpening systems, systems where all solution segments that connect the key tie lines present in the displacement are shock fronts. In the following report, we describe the extension of the analytical theory to include systems with rarefactions (continuous composition and saturation variations) between key tie lines. With the completion of this analysis, a completely general procedure has been developed for finding solutions for problems in which a multicomponent gas displaces a multicomponent oil.

Download or read book HIGH RESOLUTION PREDICTION OF GAS INJECTION PROCESS PERFORMANCE FOR HETEROGENEOUS RESERVOIRS written by Franklin M. Orr, Jr and published by . This book was released on 2003 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report we present an approach for accurate and consistent implementation of gravity effects in compositional streamline simulation. The approach is based on an operator-splitting technique, successfully applied in streamline simulation of black-oil models. The method is demonstrated to conserve mass. Its application adds only marginally to the overall CPU requirement. We provide a detailed description of the approach to incorporate gravity effects and demonstrate the efficiency of compositional streamline simulation, even for cases where gravity segregation plays an important role in the overall process performance. The new approach is demonstrated to be in excellent agreement with commercial FD simulators for prediction of flows in 2D vertical and multi-well 3D geometries. Finally, we outline the work required to extend the compositional streamline approach to handle three-phase flow modeling, also including gravity.

Download or read book Prediction of Gas Injection Performance for Heterogeneous Reservoirs written by Martin J. Blunt and published by . This book was released on 1999 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book PREDICTION OF GAS INJECTION PERFORMANCE FOR HETEROGENEOUS RESERVOIRS written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This final report describes research carried out in the Department of Petroleum Engineering at Stanford University from September 1996--May 2000 under a three-year grant from the Department of Energy on the ''Prediction of Gas Injection Performance for Heterogeneous Reservoirs''. The advances from the research include: new tools for streamline-based simulation including the effects of gravity, changing well conditions, and compositional displacements; analytical solutions to 1D compositional displacements which can speed-up gas injection simulation still further; and modeling and experiments that delineate the physics that is unique to three-phase flow.

Download or read book Performance and Recovery Prediction in Heterogeneous Naturally Fractured Reservoirs Under the Solution Gas Drive Process written by Fuad Qasem and published by . This book was released on 1996 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamentals and Practical Aspects of Gas Injection written by Reza Azin and published by Springer Nature. This book was released on 2021-07-28 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers different aspects of gas injection, from the classic pressure maintenance operation to enhanced oil recovery (EOR), underground gas storage (UGS), and carbon capture and storage (CCS). The authors detail the unique characteristics and specific criteria of each application, including: material balance equations phase behaviour reservoir engineering well design operating aspects surface facilities environmental issues Examples, data, and simulation codes are provided to enable the reader to gain an in-depth understanding of these applications. Fundamentals and Practical Aspects of Gas Injection will be of use to practising engineers in the fields of reservoir engineering, and enhanced oil recovery. It will also be of interest to researchers, academics, and graduate students working in the field of petroleum engineering.

Download or read book Low Salinity and Engineered Water Injection for Sandstone and Carbonate Reservoirs written by Emad Walid Al Shalabi and published by Gulf Professional Publishing. This book was released on 2017-06-14 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low Salinity and Engineered Water Injection for Sandstone and Carbonate Reservoirs provides a first of its kind review of the low salinity and engineered water injection (LSWI/EWI) techniques for today’s more complex enhanced oil recovery methods. Reservoir engineers today are challenged in the design and physical mechanisms behind low salinity injection projects, and to date, the research is currently only located in numerous journal locations. This reference helps readers overcome these challenging issues with explanations on models, experiments, mechanism analysis, and field applications involved in low salinity and engineered water. Covering significant laboratory, numerical, and field studies, lessons learned are also highlighted along with key areas for future research in this fast-growing area of the oil and gas industry. After an introduction to its techniques, the initial chapters review the main experimental findings and explore the mechanisms behind the impact of LSWI/EWI on oil recovery. The book then moves on to the critical area of modeling and simulation, discusses the geochemistry of LSWI/EWI processes, and applications of LSWI/EWI techniques in the field, including the authors’ own recommendations based on their extensive experience. It is an essential reference for professional reservoir and field engineers, researchers and students working on LSWI/EWI and seeking to apply these methods for increased oil recovery. Teaches users how to understand the various mechanisms contributing to incremental oil recovery using low salinity and engineering water injection (LSWI/EWI) in sandstones and carbonates Balances guidance between designing laboratory experiments, to applying the LSWI/EWI techniques at both pilot-scale and full-field-scale for real-world operations Presents state-of-the-art approaches to simulation and modeling of LSWI/EWI

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 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 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 Effect of Hysteresis and Heterogeneity on Gas Flooding Performance written by Liwei Li and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas injection processes are the most widely used EOR processes. CO2 is the most popular solvent used to arrest declining oil production and also to aid in CO2 storage. Well planned and optimized CO2 flooding can be highly profitable and thus crucial to model accurately the CO2 injection mechanism in heterogeneous reservoir systems, where considerable amount of oil are not swept after water flooding. Estimates of oil recovery and EOR efficiencies are critical for optimal design of the process. The process recovery is usually divided into two terms, i.e., local displacement efficiency (ratio of produced oil over the amount of contacted oil) and sweep efficiency (volume of oil contacted over the amount of oil in place). Sweep and local displacement efficiencies are complex functions of fluid and petrophysical properties of the reservoir, geometry of the reservoir, well pattern and injection rates. This research examines the effect of different scaling parameters on sweep efficiency. Furthermore, a new model is proposed that includes hysteresis effects on multiphase flow in porous media. Finally, we develop a new framework to obtain the solutions during cyclic injections of fluids.Achieving sufficient sweep efficiency during gas flooding can be a challenge. A new recovery scheme based on first-contact-miscible flow is proposed in this dissertation, which achieves nearly greater than 80% for heterogeneous reservoirs using a gravity-assisted process. As a side benefit, the gravity-assisted processes also have the potential to store more carbon dioxide. A total of eleven scaling groups are determined based on inspectional analysis and found to model accurately storage and oil recovery. Latin hypercube sampling is used to generate the response surfaces based on the eleven scaling groups. The response surfaces can also be used as screening models for large databases of reservoirs to determine the most attractive CO2 EOR and storage candidates. Correlation-based relative permeability and capillary pressure are commonly used in commercial simulators to determine the recoveries. A new equation of state based approach is proposed. That is, relative permeability and capillary pressure can be calculated using both phase saturation and topology as state variables. Normalized Euler characteristics is defined to quantify the connectivity of fluid phases regardless of phase saturation and sample size. Capillary pressure is modelled as a state function of phase saturation, normalized Euler characteristics, and wettability index (defined by contact angle). Coupled tuning of both relative permeability and capillary pressure requires only a few coefficients. Furthermore, the new capillary pressure model is demonstrated to achieve satisfactory predictability using experimental data away from measurements.A general semi-analytical framework is developed to investigate the multiphase flow of CO2 and water within porous media with variable initial and injection conditions. Effects of relative permeability hysteresis and phase behavior are modelled by constructing an analytical Global Riemann solver. Furthermore, a robust front-tracking algorithm is implemented to solve wave interactions during CO2-alternating-water injections. Solutions from the semi-analytical approach are used to validate finite-difference numerical simulations. CO2 injection into a reservoir could possibly form discontinuous ganglia. The connectivity and amount of these ganglia determines the gas relative permeability. Both the conventional relative permeability and a new equation-of-state (EoS) relative permeability model are used to evaluate the residual trapping during semi-immiscible displacement. Dynamics of CO2 trapping is investigated semi-analytically and the results provide compelling evidence and motivation for using cyclic injection schemes to enhance trapping and for the long-term storage of CO2 in the subsurface.The simplicity of the semi-analytical solution yields an efficient and quick method to investigate the impact of uncertainty in the parameters on the CO2 WAG injectivities. CO2 residual trapping and solubility are shown to significantly affect the well injectivity. The semi-analytical approach may also provide a tool to downscale the saturations (or total mobilities) near the wellbore.

Download or read book Reservoir Engineering written by Sylvester Okotie and published by Springer. This book was released on 2018-11-22 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a clear and basic understanding of the concept of reservoir engineering to professionals and students in the oil and gas industry. The content contains detailed explanations of key theoretic and mathematical concepts and provides readers with the logical ability to approach the various challenges encountered in daily reservoir/field operations for effective reservoir management. Chapters are fully illustrated and contain numerous calculations involving the estimation of hydrocarbon volume in-place, current and abandonment reserves, aquifer models and properties for a particular reservoir/field, the type of energy in the system and evaluation of the strength of the aquifer if present. The book is written in oil field units with detailed solved examples and exercises to enhance practical application. It is useful as a professional reference and for students who are taking applied and advanced reservoir engineering courses in reservoir simulation, enhanced oil recovery and well test analysis.

Download or read book Waterflooding written by G. Paul Willhite and published by . This book was released on 1986 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Waterflooding begins with understanding the basic principles of immiscible displacement, then presents a systematic procedure for designing a waterflood.

Download or read book Petrophysics written by Erle C. Donaldson and published by Elsevier. This book was released on 2004-01-24 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt: The petroleum geologist and engineer must have a working knowledge of petrophysics in order to find oil reservoirs, devise the best plan for getting it out of the ground, then start drilling. This book offers the engineer and geologist a manual to accomplish these goals, providing much-needed calculations and formulas on fluid flow, rock properties, and many other topics that are encountered every day. New updated material covers topics that have emerged in the petrochemical industry since 1997. - Contains information and calculations that the engineer or geologist must use in daily activities to find oil and devise a plan to get it out of the ground - Filled with problems and solutions, perfect for use in undergraduate, graduate, or professional courses - Covers real-life problems and cases for the practicing engineer

Download or read book Numerical Approximation to Performance Predictions of Gas drive Reservoir with Or Without Gas cap and Gas Injection written by Jagannath Rao Ghole and published by . This book was released on 1967 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book PVT and Phase Behaviour Of Petroleum Reservoir Fluids written by Ali Danesh and published by Elsevier. This book was released on 1998-05-07 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book on PVT and Phase Behaviour Of Petroleum Reservoir Fluids is volume 47 in the Developments in Petroleum Science series. The chapters in the book are: Phase Behaviour Fundamentals, PVT Tests and Correlations, Phase Equilibria, Equations of State, Phase Behaviour Calculations, Fluid Characterisation, Gas Injection, Interfacial Tension, and Application in Reservoir Simulation.

Download or read book An Introduction to Reservoir Simulation Using MATLAB GNU Octave written by Knut-Andreas Lie and published by Cambridge University Press. This book was released on 2019-08-08 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents numerical methods for reservoir simulation, with efficient implementation and examples using widely-used online open-source code, for researchers, professionals and advanced students. This title is also available as Open Access on Cambridge Core.