Download or read book Oil Recovery Enhancement from Fractured Low Permeability Reservoirs Carbonated Water written by and published by . This book was released on 1991 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of the investigative efforts for this jointly funded DOE-State of Texas research project achieved during the 1990-1991 year may be summarized as follows: Geological Characterization - Detailed maps of the development and hierarchical nature the fracture system exhibited by Austin Chalk outcrops were prepared. The results of these efforts were directly applied to the development of production decline type curves applicable to a dual-fracture-matrix flow system. Analysis of production records obtained from Austin Chalk operators illustrated the utility of these type curves to determine relative fracture/matrix contributions and extent. Well-log response in Austin Chalk wells has been shown to be a reliable indicator of organic maturity. Shear-wave splitting concepts were used to estimate fracture orientations from Vertical Seismic Profile, VSP data. Several programs were written to facilitate analysis of the data. The results of these efforts indicated fractures could be detected with VSP seismic methods. Development of the EOR Imbibition Process - Laboratory displacement as well as Magnetic Resonance Imaging, MRI and Computed Tomography, CT imaging studies have shown the carbonated water-imbibition displacement process significantly accelerates and increases recovery from oil saturated, low permeability rocks. Field Tests - Two operators amenable to conducting a carbonated water flood test on an Austin Chalk well have been identified. Feasibility studies are presently underway.
Download or read book Oil Recovery Enhancement from Fractured Low Permeability Reservoirs Part 2 Annual Report October 1 1990 September 31 1991 written by and published by . This book was released on 1991 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of the investigative efforts for this jointly funded DOE-State of Texas research project achieved during the 1990--1991 year may be summarized as follows: Geological Characterization -- Detailed maps of the development and hierarchical nature the fracture system exhibited by Austin Chalk outcrops were prepared. These results of these efforts were directly applied to the development of production decline type curves applicable to a dual fracture-matrix flow system. Analysis of production records obtained from Austin Chalk operators illustrated the utility of these type curves to determine relative fracture/matrix contributions and extent. Well-log response in Austin Chalk wells has been shown to be a reliable indicator of organic maturity. (VSP) Vertical-Seismic Profile data was used to use shear-wave splitting concepts to estimate fracture orientations. Several programs were to be written to facilitate analysis of the data. The results of these efforts indicated fractures could be detected with VSP seismic methods. Development of the (EOR) Enhanced Oil Recovery Imbibition Process -- Laboratory displacement as well as MRI and CT imaging studies have shown the carbonated water-imbibition displacement process significantly accelerates and increases recovery of an oil saturated, low permeability core material, when compared to that of a normal brine imbibition displacement process. A study of oil recovery by the application of a cyclic carbonated water imbibition process, followed by reducing the pressure below the bubble point of the CO2-water solution, indicated the possibility of alternate and new enhanced recovery method. The installation of an artificial solution gas drive significantly increased oil recovery. The extent and arrangement of micro-fractures in Austin Chalk horizontal cores was mapped with CT scanning techniques. The degree of interconnection of the micro-fractures was easily visualized.
Download or read book Oil Recovery Enhancement from Fractured Low Permeability Reservoirs Annual Report October 1 1990 September 31 1991 Annex 4 written by and published by . This book was released on 1991 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of the investigative efforts for this jointly funded DOE-State of Texas research project achieved during the 1990-1991 year may be summarized as follows: Geological Characterization - Detailed maps of the development and hierarchical nature the fracture system exhibited by Austin Chalk outcrops were prepared. The results of these efforts were directly applied to the development of production decline type curves applicable to a dual-fracture-matrix flow system. Analysis of production records obtained from Austin Chalk operators illustrated the utility of these type curves to determine relative fracture/matrix contributions and extent. Well-log response in Austin Chalk wells has been shown to be a reliable indicator of organic maturity. Shear-wave splitting concepts were used to estimate fracture orientations from Vertical Seismic Profile, VSP data. Several programs were written to facilitate analysis of the data. The results of these efforts indicated fractures could be detected with VSP seismic methods. Development of the EOR Imbibition Process - Laboratory displacement as well as Magnetic Resonance Imaging, MRI and Computed Tomography, CT imaging studies have shown the carbonated water-imbibition displacement process significantly accelerates and increases recovery from oil saturated, low permeability rocks. Field Tests - Two operators amenable to conducting a carbonated water flood test on an Austin Chalk well have been identified. Feasibility studies are presently underway.
Download or read book Oil Recovery Enhancement from Fractured Low Permeability Reservoirs Quarterly Report January 1 1993 March 31 1993 written by and published by . This book was released on 1993 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress reports are presented for the following: Subtask l-- interpreting and predicting fractures; Subtask 2--relating recovery to well-log signatures; and Subtask 4--mathematical modeling. Some of the highlights are as follows; substantial improvement in the determination of the orientation of the fractures has been obtained when source imbalances are corrected; further improvement is achieved when the down-hole geophones are assumed to be in the direction of the sources and their coupling variations corrected; petrographic analysis of microseams was conducted on 16 thin sections to determine the gross composition and relationship of seams to microfractures; the semi-analytical model was used to describe the laboratory imbibition oil recovery behavior by plain water and carbonated waterflood at 70°F, 110°F and 150°F; and the compositional, dual-porosity numerical model (COMABS) was used to describe the laboratory imbibition oil recovery from a chalk core.
Download or read book Oil Recovery Enhancement from Fractured Low Permeability Reservoirs written by Poston S. and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oil Recovery Enhancement from Fractured Low permeability Reservoirs written by S. Poston and published by . This book was released on 1994 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enhanced Oil Recovery in Shale and Tight Reservoirs written by James J.Sheng and published by Gulf Professional Publishing. This book was released on 2019-11-07 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oil Recovery in Shale and Tight Reservoirs delivers a current, state-of-the-art resource for engineers trying to manage unconventional hydrocarbon resources. Going beyond the traditional EOR methods, this book helps readers solve key challenges on the proper methods, technologies and options available. Engineers and researchers will find a systematic list of methods and applications, including gas and water injection, methods to improve liquid recovery, as well as spontaneous and forced imbibition. Rounding out with additional methods, such as air foam drive and energized fluids, this book gives engineers the knowledge they need to tackle the most complex oil and gas assets. Helps readers understand the methods and mechanisms for enhanced oil recovery technology, specifically for shale and tight oil reservoirs Includes available EOR methods, along with recent practical case studies that cover topics like fracturing fluid flow back Teaches additional methods, such as soaking after fracturing, thermal recovery and microbial EOR
Download or read book Enhanced Oil Recovery Field Case Studies written by Tor Austad and published by Elsevier Inc. Chapters. This book was released on 2013-04-10 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water flooding of oil reservoirs has been performed for a century in order to improve oil recovery for two reasons: (1) give pressure support to the reservoir to prevent gas production and (2) displace the oil by viscous forces. During the last 30 years, it was discovered that the wetting properties of the reservoir played a very important role for the efficiency of the water flood. Even though much work have been published on crude oil–brine–rock (CBR) interaction related to wetting properties, Professor N.R. Morrow, University of Wyoming, asked the audience the following question at the European enhanced oil-recovery (EOR) meeting in Cambridge, April 2011: Do we understand water flooding of oil reservoirs? If we are not able to explain why injection fluids of different ionic composition can have a great impact on displacement efficiency and oil recovery, the answer to Morrow’s question is NO. Researchers have to admit that we do not know the phenomena of water flooding well enough. The key to improve our understanding is to obtain fundamental chemical understanding of the CBR interaction by controlled laboratory studies, and then propose chemical mechanisms, which should be validated also from field experience. In this chapter, I have tried to sum up our experience and chemical understanding on water-based EOR in carbonates and sandstones during the last 20 years with a specific focus on initial wetting properties and possibilities for wettability modification to optimize oil recovery. Chemically, the CBR interaction is completely different in carbonates and sandstones. The proposed chemical mechanisms for wettability modification are used to explain field observations.
Download or read book Oil Recovery Enhancement from Fractured Low Permeability Reservoirs Quarterly Technical Progress Report July 1 1991 September 30 1991 written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oil Recovery Enhancement from Fractured Low Permeability Reservoirs Annual Report 1990 1991 Part 1 written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter presents models of wettability alteration using surfactants and upscaling models related to oil recovery in fractured carbonate reservoirs. Chemicals used in carbonate reservoirs are reviewed. The presented field cases where surfactants were used to stimulate oil recovery are the Mauddud carbonate in Bahrain, the Yates field and the Cretaceous Upper Edwards reservoir in Texas, the Cottonwood Creek field in Wyoming, and the Baturaja formation in the Semoga field in Indonesia.
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 Recovery Improvement written by Qiwei Wang and published by Gulf Professional Publishing. This book was released on 2022-09-06 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oil and Gas Chemistry Management Series brings an all-inclusive suite of tools to cover all the sectors of oil and gas chemicals from drilling, completion to production, processing, storage, and transportation. The third reference in the series, Recovery Improvement, delivers the critical chemical basics while also covering the latest research developments and practical solutions. Organized by the type of enhanced recovery approaches, this volume facilitates engineers to fully understand underlying theories, potential challenges, practical problems, and keys for successful deployment. In addition to the chemical, gas, and thermal methods, this reference volume also includes low-salinity (smart) water, microorganism- and nanofluid-based recovery enhancement, and chemical solutions for conformance control and water shutoff in near wellbore and deep in the reservoir. Supported by a list of contributing experts from both academia and industry, this book provides a necessary reference to bridge petroleum chemistry operations from theory into more cost-efficient and sustainable practical applications. Covers background information and practical guidelines for various recovery enhancement domains, including chapters on enhanced oil recovery in unconventional reservoirs and carbon sequestration in CO2 gas flooding for more environment-friendly and more sustainable initiatives Provides effective solutions to control chemistry-related issues and mitigation strategies for potential challenges from an industry list of experts and contributors Delivers both up-to-date research developments and practical applications, featuring various case studies
Download or read book Compositional Modelling of Imbibition Oil Recovery Processes in Naturally fractured Reservoirs written by Shamsuddin H. Shenawi and published by . This book was released on 1994 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Study of Low Salinity Water Flooding and Fracturing Effects in Low Permeability Carbonate Reservoir written by Benny Arianto Harahap and published by . This book was released on 2017 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: In past decades, there were numerous research works demonstrated that salinity alteration of injected water could enhance the oil recovery. Low salinity water (LSW) injection is a type of Enhanced Oil Recovery (EOR) method, which attracts the industrial, and researchers because of its simplicity to use the implications, Environment-friendly nature, and less cost. In addition to, hydraulic fracturing, also known as hydraulic stimulation, is another EOR method that improves hydrocarbon flow by creating fractures in the Low Permeability Formation (LPF) that connects the reservoir and wellbore. Fractures will increase the permeability of reservoir and give the flow path for hydrocarbon to be produced. The main objective of this study is to compare between low salinity injection and fracturing as a recovery technique for LPF. The LSW flooding tests conducted, with several salinity concentrations (157,662; 72,927; 62,522; 6,252; and 1,250 ppm), in both artificially fractured and non-fractured carbonate cores that filled with crude oil. The properties of injected water and its dilutions (LSW) have been thoroughly investigated in the laboratory. The crude oil and low permeability chalky limestone core samples (permeability ranges from 0.01 - 1.2 millidarcy) were selected from oil fields in the United Arab Emirates (UAE). The experiment shows that seawater (SW) diluted ten times (6,252 ppm) is the optimum salinity in enhancing the oil recovery for selected reservoir condition. Additional oil recoveries for SW and SW diluted ten times are 4.9% and 12.7% respectively. On the other hand, the fractured system produced up to 7.4% incremental oil recovery more than the non-fractured system. Moreover, a combination of fracturing and LSW (6,252 ppm) improved the best recovery by 17.7% of remaining oil in place over the formation brine injection. Fines migration and dissolution that may lead to wettability alteration were investigated as the reason behind LSW flooding. The UAE and worldwide companies to enhance oil recovery for low permeability carbonate reservoir could use results of this study as an additional reference in selecting most efficient EOR method that could be applied.
Download or read book Enhanced Oil Recovery written by Marcel Latil and published by Editions TECHNIP. This book was released on 1980 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents : 1. Factors common to all enhanced recovery methods. 2. Water injection. 3. Gas injection in an oil reservoir (immiscible displacement). 4. Miscible drive. 5. Gas recycling in gas-condensate reservoirs. 6. Thermal recovery methods. 7. Other methods of enhanced recovery. References. Index.
Download or read book Enhanced Oil Recovery from Fractured Carbonate Reservoirs Using Nanoparticles with Low salinty Water and Surfactant written by Gideon Dordzie and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The global significance of oil production in the face of increasing demand for energy and its resources cannot be overemphasized. Eco-friendly and effective oil recovery techniques have been diversely implemented in addition to traditional brine imbibition into porous matrix domains aimed at displacing substantial amounts of oil towards production wells for maximum oil recovery. Be that as it may, carbonate reservoirs, which contain more than half of the global oil reserves, are characterized by heterogeneities, natural fracture networks, and oil wetness, culminating in waterflooding inefficiency. Consequently, the performance of low salinity water (LSW), nanoparticles (NPs), and surfactants (abbreviated as LNS) in their individual and combined applications for enhanced oil recovery (EOR) purposes has been highlighted in several works. Again, an emerging technique involving the alternating injection of LNS has been previously employed for carbonates; however, their implementation in fractured carbonate reservoirs (FCRs) was yet to be investigated. One of the crucial applications of NPs for incremental oil recovery is their tendency to enhance mobility control via viscosity modification. Therefore, this work probes the viscosity behavior of a solution of NPs dispersed in different ionic components of brine with increasing concentrations of the NPs. Ultimately, the understanding of crude oil-brine-rock (COBR) interactions, the viscosity behavior of the nanofluids, and the previous performances of LNS are used to effectively design suitable coreflooding experiments for examining the performance of LNS in FCRs. The applicability of LNS is first probed in spontaneous imbibition (SI) tests and subsequently implemented in dynamic imbibition experiments utilizing specific NPs and an anionic surfactant. The oil recovery results obtained are herein presented and the corresponding mechanisms are highlighted. Furthermore, owing to the successful application of LNS with the usage of anionic surfactants, this investigation is extended to include non-ionic and cationic surfactants. The sequential injection of LNS into FCRs under the same experimental conditions used in previous studies is executed for a different solution of NPs and cationic surfactants following the subjection of the injected fluids to SI tests. The painstaking analysis of the observations as well as the relevant inferences deduced is thus presented in this investigation. Overall, the suitability of the alternating injection of LNS demonstrated in this study under extremely unfavorable conditions and potential impediments to incremental oil recovery indicates that it is well-fitted for EOR in FCRs.
