Strategies for Mitigating Risks of Scalibility and Containment in Geological CO2 Storage

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ISBN 13 :
Total Pages : 225 pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Strategies for Mitigating Risks of Scalibility and Containment in Geological CO2 Storage by : Yun Wu (Ph. D.)

Download or read book Strategies for Mitigating Risks of Scalibility and Containment in Geological CO2 Storage written by Yun Wu (Ph. D.) and published by . This book was released on 2017 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: To be relevant for greenhouse gas mitigation, geological CO2 storage in a deep saline aquifer must be scalable, and the stored CO2 must be securely contained. Conventional approaches to aquifer storage have both scalability and containment risks. In this work, the scalability risks of interest are the achievable sustained injection rates of CO2 and storage efficiencies. The containment risks examined here are associated with uncontrolled fracture initiation and propagation in the injection zone, and CO2 leakage. Operational strategies for minimizing the risks of scalability and containment while maximizing the injection rate and storage efficiency are important to support commercially viable implementations of numerous large-scale CO2 storage projects. We focus on the CO2 storage by surface dissolution strategy, which stores the captured CO2 in a storage aquifer by dissolving it into brine extracted from the storage formation and then injecting CO2-saturated brine into the same storage formation. This method has advantages over the standard CO2 storage method in eliminating or reducing certain containment risks, but it still faces the scalability risks of achieving large injection rates. We quantify the maximum injection rate of CO2-saturated brine for a safe storage project, by preventing the initiation and propagation of tensile fractures. We incorporate thermal constraints in our model by including the induced thermoelastic stress in the calculation of the formation breakdown pressure. We design a closed-loop surface dissolution technique that completely eliminates the problem of brine disposal. However, when using this technique the buildup of reservoir pressure gradually reduces the maximum injection rate. We propose a strategy to manage the pressure distribution and maximize the injection rates for each injector. Yet in large-scale geological CO2 storage projects, injection-induced fracturing may be unavoidable when injecting at desired rates. We develop models to analyze injection data from a field supercritical CO2 injection project. The analysis suggests that proper pressure management could stop the propagation of injection-induced fractures. This self-limiting feature of injection-induced fracturing mitigates the containment risks and greatly increases the injection rates. To improve the aquifer utilization efficiency for CO2 storage using the surface dissolution strategy, we continue injecting CO2-saturated brine beyond the pressure contour corresponding to the bubble point. However, this introduces the risks of CO2 leakage. We develop a 1D model in a homogeneous aquifer to study the migration of two-phase fluid flow. Two limiting cases are studied to confine the mobility of free gaseous phase. The results indicate a significant increase in stored CO2 with low risks of leakage because of the small saturation and mobility of exsolved CO2. Allowing the breakthrough of injected CO2-saturated brine at the producers would also increase the aquifer utilization efficiency. The aquifer utilization efficiency can be optimized by minimizing the production/recycling rate of CO2-saturated brine in heterogeneous fields. The results show greatly improved aquifer utilization efficiencies at the cost of handling a small pore volume of produced/recycled CO2-saturated brine.

Geological Storage of Carbon Dioxide (CO2)

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Publisher : Elsevier
ISBN 13 : 085709727X
Total Pages : 380 pages
Book Rating : 4.8/5 (57 download)

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Book Synopsis Geological Storage of Carbon Dioxide (CO2) by : J Gluyas

Download or read book Geological Storage of Carbon Dioxide (CO2) written by J Gluyas and published by Elsevier. This book was released on 2013-11-23 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geological storage and sequestration of carbon dioxide, in saline aquifers, depleted oil and gas fields or unminable coal seams, represents one of the most important processes for reducing humankind’s emissions of greenhouse gases. Geological storage of carbon dioxide (CO2) reviews the techniques and wider implications of carbon dioxide capture and storage (CCS). Part one provides an overview of the fundamentals of the geological storage of CO2. Chapters discuss anthropogenic climate change and the role of CCS, the modelling of storage capacity, injectivity, migration and trapping of CO2, the monitoring of geological storage of CO2, and the role of pressure in CCS. Chapters in part two move on to explore the environmental, social and regulatory aspects of CCS including CO2 leakage from geological storage facilities, risk assessment of CO2 storage complexes and public engagement in projects, and the legal framework for CCS. Finally, part three focuses on a variety of different projects and includes case studies of offshore CO2 storage at Sleipner natural gas field beneath the North Sea, the CO2CRC Otway Project in Australia, on-shore CO2 storage at the Ketzin pilot site in Germany, and the K12-B CO2 injection project in the Netherlands. Geological storage of carbon dioxide (CO2) is a comprehensive resource for geoscientists and geotechnical engineers and academics and researches interested in the field. Reviews the techniques and wider implications of carbon dioxide capture and storage (CCS) An overview of the fundamentals of the geological storage of CO2 discussing the modelling of storage capacity, injectivity, migration and trapping of CO2 among other subjects Explores the environmental, social and regulatory aspects of CCS including CO2 leakage from geological storage facilities, risk assessment of CO2 storage complexes and the legal framework for CCS

Geologic Carbon Sequestration

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Publisher : Springer
ISBN 13 : 3319270192
Total Pages : 336 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Geologic Carbon Sequestration by : V. Vishal

Download or read book Geologic Carbon Sequestration written by V. Vishal and published by Springer. This book was released on 2016-05-11 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This exclusive compilation written by eminent experts from more than ten countries, outlines the processes and methods for geologic sequestration in different sinks. It discusses and highlights the details of individual storage types, including recent advances in the science and technology of carbon storage. The topic is of immense interest to geoscientists, reservoir engineers, environmentalists and researchers from the scientific and industrial communities working on the methodologies for carbon dioxide storage. Increasing concentrations of anthropogenic carbon dioxide in the atmosphere are often held responsible for the rising temperature of the globe. Geologic sequestration prevents atmospheric release of the waste greenhouse gases by storing them underground for geologically significant periods of time. The book addresses the need for an understanding of carbon reservoir characteristics and behavior. Other book volumes on carbon capture, utilization and storage (CCUS) attempt to cover the entire process of CCUS, but the topic of geologic sequestration is not discussed in detail. This book focuses on the recent trends and up-to-date information on different storage rock types, ranging from deep saline aquifers to coal to basaltic formations.

Negative Emissions Technologies and Reliable Sequestration

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Publisher : National Academies Press
ISBN 13 : 0309484529
Total Pages : 511 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Negative Emissions Technologies and Reliable Sequestration by : National Academies of Sciences, Engineering, and Medicine

Download or read book Negative Emissions Technologies and Reliable Sequestration written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2019-04-08 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: To achieve goals for climate and economic growth, "negative emissions technologies" (NETs) that remove and sequester carbon dioxide from the air will need to play a significant role in mitigating climate change. Unlike carbon capture and storage technologies that remove carbon dioxide emissions directly from large point sources such as coal power plants, NETs remove carbon dioxide directly from the atmosphere or enhance natural carbon sinks. Storing the carbon dioxide from NETs has the same impact on the atmosphere and climate as simultaneously preventing an equal amount of carbon dioxide from being emitted. Recent analyses found that deploying NETs may be less expensive and less disruptive than reducing some emissions, such as a substantial portion of agricultural and land-use emissions and some transportation emissions. In 2015, the National Academies published Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration, which described and initially assessed NETs and sequestration technologies. This report acknowledged the relative paucity of research on NETs and recommended development of a research agenda that covers all aspects of NETs from fundamental science to full-scale deployment. To address this need, Negative Emissions Technologies and Reliable Sequestration: A Research Agenda assesses the benefits, risks, and "sustainable scale potential" for NETs and sequestration. This report also defines the essential components of a research and development program, including its estimated costs and potential impact.

Deep Geological Storage of CO2 on the UK Continental Shelf

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)

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Book Synopsis Deep Geological Storage of CO2 on the UK Continental Shelf by :

Download or read book Deep Geological Storage of CO2 on the UK Continental Shelf written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Deep Geological Storage of CO2 on the UK Continental Shel

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)

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Book Synopsis Deep Geological Storage of CO2 on the UK Continental Shel by :

Download or read book Deep Geological Storage of CO2 on the UK Continental Shel written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Carbon Capture and Sequestration

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Publisher : Wiley-Blackwell
ISBN 13 : 0813802075
Total Pages : 296 pages
Book Rating : 4.8/5 (138 download)

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Book Synopsis Carbon Capture and Sequestration by : Elizabeth Wilson

Download or read book Carbon Capture and Sequestration written by Elizabeth Wilson and published by Wiley-Blackwell. This book was released on 2007-04-10 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first systematic presentation of the technical, legal, and economic forces that must coalesce to realize carbon dioxide capture and geologic sequestration as a viable CO2 reduction strategy. It synthesizes key engineering data and explains the technological and legal conditions that must be in place for carbon sequestration to be realized.

How to Store CO2 Underground: Insights from early-mover CCS Projects

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Publisher : Springer Nature
ISBN 13 : 303033113X
Total Pages : 129 pages
Book Rating : 4.0/5 (33 download)

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Book Synopsis How to Store CO2 Underground: Insights from early-mover CCS Projects by : Philip Ringrose

Download or read book How to Store CO2 Underground: Insights from early-mover CCS Projects written by Philip Ringrose and published by Springer Nature. This book was released on 2020-01-01 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the scientific basis and engineering practice for CO2 storage, covering topics such as storage capacity, trapping mechanisms, CO2 phase behaviour and flow dynamics, engineering and geomechanics of geological storage, injection well design, and geophysical and geochemical monitoring. It also provides numerous examples from the early mover CCS projects, notably Sleipner and Snøhvit offshore Norway, as well as other pioneering CO2 storage projects.

Screening and Ranking Framework (SRF) for Geologic CO2 Storagesite Selection on the Basis of HSE Risk

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Screening and Ranking Framework (SRF) for Geologic CO2 Storagesite Selection on the Basis of HSE Risk by :

Download or read book Screening and Ranking Framework (SRF) for Geologic CO2 Storagesite Selection on the Basis of HSE Risk written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A screening and ranking framework (SRF) has been developedto evaluate potential geologic carbon dioxide (CO2) storage sites on thebasis of health, safety, and environmental (HSE) risk arising from CO2leakage. The approach is based on the assumption that CO2 leakage risk isdependent on three basic characteristics of a geologic CO2 storage site:(1) the potential for primary containment by the target formation; (2)the potential for secondary containment if the primary formation leaks;and (3) the potential for attenuation and dispersion of leaking CO2 ifthe primary formation leaks and secondary containment fails. Theframework is implemented in a spreadsheet in which users enter numericalscores representing expert opinions or published information along withestimates of uncertainty. Applications to three sites in Californiademonstrate the approach. Refinements and extensions are possible throughthe use of more detailed data or model results in place of propertyproxies.

Containment Risk Assessment of the Northern Lights Aurora CO2 Storage Site

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)

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Book Synopsis Containment Risk Assessment of the Northern Lights Aurora CO2 Storage Site by : Peter Zweigel

Download or read book Containment Risk Assessment of the Northern Lights Aurora CO2 Storage Site written by Peter Zweigel and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Assessment of containment (storage site integrity) is a key activity in the evaluation, and a requirement for approval, of potential CO2 storage sites. Here we present the workflow used for, and key results of, the containment risk assessment (CRA) in the Northern Lights project, which is the transport and storage part of the Norwegian “Longship” full-scale CCS project. In the Northern Lights project, CO2 storage is planned to take place at the Aurora site (Exploitation license EL001), southwest of the Troll Field.Injection is planned into the sandstone-rich Johansen Formation (Lower Jurassic Dunlin Group). The argillaceous upper member of the Dunlin Group, the Drake Formation, provides the main seal for the storage reservoir. Several further barrier and baffle units and intervening sandstones are present between the Drake Fm. and the sand-rich units of the Viking Group, which contain the giant Troll field with a high level of depletion to date. The injection site is located downdip of - and stratigraphically deeper than - the Troll West gas province (TWGP). Injected CO2 is expected to move slowly over time buoyancy-driven up-dip (northwards), with a small proportion reaching eventually the structural trap underneath the TWGP. A key method utilized in the Aurora CRA is the bowtie method. Bowties were prepared for each identified “leakage” pathway (according to the definition in the EU CO2 Storage Directive, thus not implying any emission to the water column) instead of per “leakage” mechanism, as has been the case in previous CO2 storage CRAs. The bowties were designed to allow for updates, which took place as new data or interpretations became available. A major update occurred after drilling of a confirmation well at the planned injection site.Key results of the CRA are that the probability of any emissions into the water column due to “leakage” of CO2 out of the storage complex is very low to negligible. Important arguments for this conclusion are (i) the hydraulic separation of the Johansen Formation from the shallower, depleted Viking Group, as attested by pressure data in the confirmation well, and (ii) the proven effectiveness of the seal to the Viking Group sandstones, which have accumulated and stored hydrocarbons over geological time. Further, any CO2 reaching and blending into the hydrocarbon accumulations nearby (such as the Troll Field) is regarded to also have very low probability. Storage Complex Monitoring (SCM) is an integral element of the CRA to enable mitigating actions in case of indications for unpredicted behaviour or “leakage” of the injected CO2.

Geological Carbon Storage

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Publisher : John Wiley & Sons
ISBN 13 : 1119118670
Total Pages : 372 pages
Book Rating : 4.1/5 (191 download)

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Book Synopsis Geological Carbon Storage by : Stéphanie Vialle

Download or read book Geological Carbon Storage written by Stéphanie Vialle and published by John Wiley & Sons. This book was released on 2018-11-15 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geological Carbon Storage Subsurface Seals and Caprock Integrity Seals and caprocks are an essential component of subsurface hydrogeological systems, guiding the movement and entrapment of hydrocarbon and other fluids. Geological Carbon Storage: Subsurface Seals and Caprock Integrity offers a survey of the wealth of recent scientific work on caprock integrity with a focus on the geological controls of permanent and safe carbon dioxide storage, and the commercial deployment of geological carbon storage. Volume highlights include: Low-permeability rock characterization from the pore scale to the core scale Flow and transport properties of low-permeability rocks Fundamentals of fracture generation, self-healing, and permeability Coupled geochemical, transport and geomechanical processes in caprock Analysis of caprock behavior from natural analogues Geochemical and geophysical monitoring techniques of caprock failure and integrity Potential environmental impacts of carbon dioxide migration on groundwater resources Carbon dioxide leakage mitigation and remediation techniques Geological Carbon Storage: Subsurface Seals and Caprock Integrity is an invaluable resource for geoscientists from academic and research institutions with interests in energy and environment-related problems, as well as professionals in the field. Book Review: William R. Green, Patrick Taylor, Sven Treitel, and Moritz Fliedner, (2020), "Reviews," The Leading Edge 39: 214–216 Geological Carbon Storage: Subsurface Seals and Caprock Integrity, edited by Stéphanie Vialle, Jonathan Ajo-Franklin, and J. William Carey, ISBN 978-1-119-11864-0, 2018, American Geophysical Union and Wiley, 364 p., US$199.95 (print), US$159.99 (eBook). This volume is a part of the AGU/Wiley Geophysical Monograph Series. The editors assembled an international team of earth scientists who present a comprehensive approach to the major problem of placing unwanted and/or hazardous fluids beneath a cap rock seal to be impounded. The compact and informative preface depicts the nature of cap rocks and the problems that may occur over time or with a change in the formation of the cap rock. I have excerpted a quote from the preface that describes the scope of the volume in a concise and thorough matter. “Caprocks can be defined as a rock that prevents the flow of a given fluid at certain temperature, pressure, and chemical conditions. ... A fundamental understanding of these units and of their evolution over time in the context of subsurface carbon storage is still lacking.” This volume describes the scope of current research being conducted on a global scale, with 31 of the 83 authors working outside of the United States. The studies vary but can be generalized as monitoring techniques for cap rock integrity and the consequence of the loss of that integrity. The preface ends by calling out important problems that remain to be answered. These include imaging cap rocks in situ, detecting subsurface leaks before they reach the surface, and remotely examining the state of the cap rock to avert any problems. Chapter 3 describes how newer methods are used to classify shale. These advanced techniques reveal previously unknown microscopic properties that complicate classification. This is an example of the more we know, the more we don't know. A sedimentologic study of the formation of shale (by far the major sedimentary rock and an important rock type) is described in Chapter 4. The authors use diagrammatic examples to illustrate how cap rocks may fail through imperfect seal between the drill and wall rock, capillary action, or a structural defect (fault). Also, the shale pore structures vary in size, and this affects the reservoir. There are descriptions of the pore structure in the Eagle Ford and Marcellus shales and several others. Pore structures are analyzed using state-of-the-art ultra-small-angle X-ray or neutron scattering. They determine that the overall porosity decreases nonlinearly with time. There are examples of cap rock performance under an array of diagnostic laboratory analyses and geologic field examples (e.g., Marcellus Formation). The importance of the sequestration of CO2 and other contaminants highlights the significance of this volume. The previous and following chapters illuminate the life history of the lithologic reservoir seal. I would like to call out Chapter 14 in which the authors illustrate the various mechanisms by which a seal can fail and Chapter 15 in which the authors address the general problems of the effect of CO2 sequestration on the environment. They establish a field test, consisting of a trailer and large tank of fluids with numerous monitoring instruments to replicate the effect of a controlled release of CO2-saturated water into a shallow aquifer. This chapter's extensive list of references will be of interest to petroleum engineers, rock mechanics, and environmentalists. The authors of this volume present a broad view of the underground storage of CO2. Nuclear waste and hydrocarbons are also considered for underground storage. There are laboratory, field, and in situ studies covering nearly all aspects of this problem. I cannot remember a study in which so many different earth science resources were applied to a single problem. The span of subjects varies from traditional geochemical analysis with the standard and latest methods in infrared and X-ray techniques, chemical and petroleum engineering, sedimentary mineralogy, hydrology, and geomechanical studies. This volume is essential to anyone working in this field as it brings several disciplines together to produce a comprehensive study of carbon sequestration. While the volume is well illustrated, there is a lack of color figures. Each chapter should have at least two color figures, or there should be several pages of color figures bound in the center of the volume. Many of the figures would be more meaningful if they had been rendered in color. Also, the acronyms are defined in the individual chapters, but it would be helpful to have a list of acronyms after the extensive index. I recommend this monograph to all earth scientists but especially petroleum engineers, structural geologists, mineralogists, and environmental scientists. Since these chapters cover a broad range of studies, it would be best if the reader has a broad background. — Patrick Taylor Davidsonville, Maryland

Factors Determining Rapid and Efficient Geologic Storage of CO2

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Publisher :
ISBN 13 :
Total Pages : 278 pages
Book Rating : 4.:/5 (755 download)

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Book Synopsis Factors Determining Rapid and Efficient Geologic Storage of CO2 by : Lokendra Jain

Download or read book Factors Determining Rapid and Efficient Geologic Storage of CO2 written by Lokendra Jain and published by . This book was released on 2011 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Implementing geological carbon sequestration at a scale large enough to mitigate emissions will involve the injection of supercritical CO2 into deep saline aquifers. The principal technical risks associated with such injection are that (i) buoyant CO2 will migrate out of the storage formation; (ii) pressure elevation during injection will limit storage rates and/or fracture the storage formation; and (iii) groundwater resources will be contaminated, directly or indirectly, by brine displaced from the storage formation. An alternative to injecting CO2 as a buoyant phase is to dissolve it into brine extracted from the storage formation, then inject the CO2-saturated brine into the storage formation. This "surface dissolution" strategy completely eliminates the risk of buoyant migration of stored CO2. It greatly mitigates the extent of pressure elevation during injection. It nearly eliminates the displacement of brine. To gain these benefits, however, it is essential to determine the costs of this method of risk reduction. This work provides a framework for optimization of the process, and hence for cost minimization. Several investigations have tabulated the storage capacity for CO2 in regions around the world, and it is widely accepted that sufficient pore volume exists in deep subsurface formations to permit large-scale sequestration of anthropogenic CO2. Given the urgency of implementing geologic sequestration and other emissions-mitigating technologies (storage rates of order 1 Gt C per year are needed within a few decades), the time required to fill a target formation with CO2 is just as important as the pore volume of that formation. To account for both these practical constraints we describe in this work a time-weighted storage capacity. This modified capacity integrates over time the maximum injection rate into a formation. The injection rate is a nonlinear function of time, formation properties and boundary conditions. The boundary conditions include the maximum allowable injection pressure and the nature of the storage formation (closed, infinite-acting, constant far-field pressure, etc.) The time-weighted storage capacity approaches the volumetric capacity as time increases. For short time intervals, however, the time-weighted storage capacity may be much less than the volumetric capacity. This work describes a method to compute time-weighted storage capacity for a database of more than 1200 North American oil reservoirs. Because all of these reservoirs have been commercially developed, their formation properties can be regarded as representative of aquifers that would be attractive targets for CO2 storage. We take the product of permeability and thickness as a measure of injectivity for a reservoir, and the product of average areal extent, net thickness and porosity as a measure of pore volume available for storage. We find that injectivity is not distributed uniformly with volume: the set of reservoirs with better than average injectivity comprises only 10% of the total volumetric storage capacity. Consequently, time weighted capacity on time scale of a few decades is 10% to 20% of the nominal volumetric capacity. The non-uniform distribution of injectivity and pore volume in the database coupled with multiphase flow effects yields a wide distribution of "filling times", i.e. the time required to place CO2 up to the boundaries of the formation. We define two limiting strategies based on fill times of the storage structures in the database and use them to calculate resource usage for a target storage rate. Since fill times are directly proportional to injectivity, smallest fill time corresponds to best injectivity and largest fill time corresponds to smallest injectivity. If best injectivity structures are used first, then the rate at which new structures would be needed is greater than if worst injectivity structures are used first. A target overall storage rate could be maintained for longer period of time when worst injectivity structures are used first. Because of the kh vs PV correlation, most of the pore volume remains unused when no extraction wells are used. Extraction wells require disposal of produced brine, which is a significant challenge, or beneficial use of the brine. An example of the latter is the surface dissolution process described in this thesis, which would enable use of a much greater fraction of the untouched pore volume.

Local Capillary Trapping in Geological Storage of Carbon Dioxide (CO2)

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Publisher :
ISBN 13 : 9781498775878
Total Pages : pages
Book Rating : 4.7/5 (758 download)

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Book Synopsis Local Capillary Trapping in Geological Storage of Carbon Dioxide (CO2) by : Ehsan Saadatpoor

Download or read book Local Capillary Trapping in Geological Storage of Carbon Dioxide (CO2) written by Ehsan Saadatpoor and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "After the injection of CO2 into a subsurface formation, storage mechanisms help immobilize the CO2. Injection strategies that promote the movement of CO2 during the post-injection period can increase immobilization by mechanisms of dissolution and residual phase trapping. This book argues that the heterogeneity intrinsic to sedimentary rocks gives rise to another category of trapping called "local capillary trapping." The study presented in this book evaluates local capillary trapping, its effectiveness to add an element of increased capacity and containment security in CO2 storage, and assesses the amount and extent of local capillary trapping expected to occur in typical storage formations."--Provided by publisher.

Managing Environmental and Human Safety Risks Associated with Geologic Storage of CO2

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Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.:/5 (548 download)

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Book Synopsis Managing Environmental and Human Safety Risks Associated with Geologic Storage of CO2 by : Jason J. Heinrich

Download or read book Managing Environmental and Human Safety Risks Associated with Geologic Storage of CO2 written by Jason J. Heinrich and published by . This book was released on 2003 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modeling CO2 Leakage from Geological Storage Formation and Reducing the Associated Risk

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Publisher :
ISBN 13 :
Total Pages : 384 pages
Book Rating : 4.:/5 (818 download)

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Book Synopsis Modeling CO2 Leakage from Geological Storage Formation and Reducing the Associated Risk by : Qing Tao (Ph. D.)

Download or read book Modeling CO2 Leakage from Geological Storage Formation and Reducing the Associated Risk written by Qing Tao (Ph. D.) and published by . This book was released on 2012 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large-scale geological storage of CO2 is likely to bring CO2 plumes into contact with existing wellbores and faults, which can act as pathways for leakage of stored CO2 Modeling the flux of CO2 along a leaky pathway requires transport properties along the pathway. We provide an approach based on the analogy between the leakage pathway in wells that exhibit sustained casing pressure (SCP) and the rate-limiting part of the leakage pathway in any wellbore that CO2 might encounter. By using field observations of SCP to estimate transport properties of a CO2 leakage pathway, we obtain a range of CO2 fluxes for the cases of buoyancy-driven (post-injection) and pressure-driven (during injection) leakage. The fluxes in example wells range from background levels to three orders of magnitude higher than flux at the natural CO2 seep in Crystal Geyser, Utah. We estimate a plausible range of fault properties from field data in the Mahogany Field using a shale gouge ratio correlation. The estimated worst-case CO2 flux is slightly above background range. The flux along fault could be attenuated to zero by permeable layers that intersect the fault. The attenuation is temporary if layers are sealed at other end. Counterintuitively, greater elevation in pressure at the base of the fault can result in less CO2 leakage at the top of the fault, because the capillary entry pressure is exceeded for more permeable layers. Since non-negligible leakage rates are possible along wellbores, it is important to be able to diagnose whether leakage is occurring. Concurrent pressure and temperature measurements are especially valuable because they independently constrain the effective permeability of a leakage path along wellbore. We describe a simple set of coupled analytical models that enable diagnosis of above-zone monitoring data. Application to data from a monitoring well during two years of steady CO2 injection shows that the observed pressure elevation requires a model with an extremely large leakage rate, while the temperature model shows that this rate would be large enough to raise the temperature in the monitoring zone significantly, which is not observed. The observation well is unlikely to be leaking. Extraction of brine from the aquifer offers advantage over standard storage procedure by greatly mitigating pressure elevation during CO2 injection. A proper management of the injection process helps reduce the risk of leakage associated with wellbores and faults. We provide strategies that optimize the injection of CO2 which involve extraction of brine in two scenarios, namely injecting dissolved CO2 and supercritical CO2. For surface dissolution case we are concerned with bubble point contour, while for supercritical CO2 injection we are concerned with breakthrough of CO2 at extractors. In a surface dissolution project, the CO2 concentration front shape when it reaches the saturation pressure contour defines the maximum areal extent of CO2-saturated brine and hence the aquifer utilization efficiency. We illustrate the reduction of utilization efficiency due to heterogeneity of the aquifer. We develop an optimal control strategy of the injection/extraction rates to maximize the utilization efficiency. We further propose an optimal well pattern orientation strategy. Results show that the approach nearly compensates the reduction of utilization efficiency due to heterogeneity. In a supercritical CO2 injection that involves brine extraction, the problem of avoiding breakthrough of CO2 at extraction wells can be addressed by optimizing flow rates at each extractor and injector to delay breakthrough as long as possible. We use the Capacitance-Resistive Model (CRM) to conduct the optimization. CRM runs rapidly and requires no prior geologic model. Fitting the model to data recorded during early stages of CO2 injection characterizes the connectivities between injection and brine-extraction wells. The fitted model parameters are used to optimize subsequent CO2 injection in the formation. Field illustration shows a significant improvement in CO2 storage efficiency.

Climate Intervention

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Publisher : National Academies Press
ISBN 13 : 0309305322
Total Pages : 235 pages
Book Rating : 4.3/5 (93 download)

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Book Synopsis Climate Intervention by : National Research Council

Download or read book Climate Intervention written by National Research Council and published by National Academies Press. This book was released on 2015-06-17 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: The signals are everywhere that our planet is experiencing significant climate change. It is clear that we need to reduce the emissions of carbon dioxide and other greenhouse gases from our atmosphere if we want to avoid greatly increased risk of damage from climate change. Aggressively pursuing a program of emissions abatement or mitigation will show results over a timescale of many decades. How do we actively remove carbon dioxide from the atmosphere to make a bigger difference more quickly? As one of a two-book report, this volume of Climate Intervention discusses CDR, the carbon dioxide removal of greenhouse gas emissions from the atmosphere and sequestration of it in perpetuity. Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration introduces possible CDR approaches and then discusses them in depth. Land management practices, such as low-till agriculture, reforestation and afforestation, ocean iron fertilization, and land-and-ocean-based accelerated weathering, could amplify the rates of processes that are already occurring as part of the natural carbon cycle. Other CDR approaches, such as bioenergy with carbon capture and sequestration, direct air capture and sequestration, and traditional carbon capture and sequestration, seek to capture CO2 from the atmosphere and dispose of it by pumping it underground at high pressure. This book looks at the pros and cons of these options and estimates possible rates of removal and total amounts that might be removed via these methods. With whatever portfolio of technologies the transition is achieved, eliminating the carbon dioxide emissions from the global energy and transportation systems will pose an enormous technical, economic, and social challenge that will likely take decades of concerted effort to achieve. Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration will help to better understand the potential cost and performance of CDR strategies to inform debate and decision making as we work to stabilize and reduce atmospheric concentrations of carbon dioxide.

Gaseous Carbon Waste Streams Utilization

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Author :
Publisher : National Academies Press
ISBN 13 : 0309483360
Total Pages : 257 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Gaseous Carbon Waste Streams Utilization by : National Academies of Sciences, Engineering, and Medicine

Download or read book Gaseous Carbon Waste Streams Utilization written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2019-02-22 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the quest to mitigate the buildup of greenhouse gases in Earth's atmosphere, researchers and policymakers have increasingly turned their attention to techniques for capturing greenhouse gases such as carbon dioxide and methane, either from the locations where they are emitted or directly from the atmosphere. Once captured, these gases can be stored or put to use. While both carbon storage and carbon utilization have costs, utilization offers the opportunity to recover some of the cost and even generate economic value. While current carbon utilization projects operate at a relatively small scale, some estimates suggest the market for waste carbon-derived products could grow to hundreds of billions of dollars within a few decades, utilizing several thousand teragrams of waste carbon gases per year. Gaseous Carbon Waste Streams Utilization: Status and Research Needs assesses research and development needs relevant to understanding and improving the commercial viability of waste carbon utilization technologies and defines a research agenda to address key challenges. The report is intended to help inform decision making surrounding the development and deployment of waste carbon utilization technologies under a variety of circumstances, whether motivated by a goal to improve processes for making carbon-based products, to generate revenue, or to achieve environmental goals.