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1995, Energy Conversion and Management
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Energies
A twenty-four-year on-going project of acid gas sequestration in a deep geological structure was subject to detailed modelling based upon a large set of geological, geophysical, and petrophysical data. The model was calibrated against available operational and monitoring data and used to determine basic characteristics of the sequestration process, such as fluid saturations and compositions, their variation in time due to fluid migrations, and the gas transition between free and aqueous phases. The simulation results were analysed with respect to various gas leakage risks. The contribution of various trapping mechanisms to the total sequestrated amount of injected gas was estimated. The observation evidence of no acid gas leakage from the structure was confirmed and explained by the simulation results of the sequestration process. The constructed and calibrated model of the structure was also used to predict the capacity of the analysed structure for increased sequestration by findi...
2015, Water Resources Research
2012
Energy Procedia
Journal of Petroleum Exploration and Production Technology
Carbon dioxide has gradually found widespread usage in the field of science and engineering while various efforts have focused on ways to combat the menace resulting from the release of this compound in the atmosphere. A major approach to combating this release is by storage in various geological formations ranging from depleted reservoir types such as saline aquifers to other carbon sinks. In this research study, we reviewed the experimental, modeling, and field studies related to the underground storage of CO2. A considerable amount of research has been conducted in simulating and modeling CO2 sequestration in the subsurface. This review highlights some of the latest contributions. Additionally, the impact of CO2 sequestration on its surroundings due to chemical reactions, adsorption, capillarity, hysteresis, and wettability were reviewed. Some major challenges associated with CO2 injection have also been highlighted. Finally, this work presents a brief history of selected field s...
2011, Chemical Engineering Research and Design
2005, Greenhouse Gas Control Technologies 7
2015, International Journal of Greenhouse Gas Control
2008, Environmental Science & Technology
2009, Energy & Fuels
2011, International Journal of Greenhouse Gas Control
2013, Fuel
2009, Computational Geosciences
2006, Chemical Engineering Research and Design
2008, International Journal of Greenhouse Gas Control
2008, Environmental Geology
2012, Journal of Energy Resources Technology
2011, International Journal of Geomechanics
2019
This final report summarizes the work that was conducted to achieve the project’s general objective of developing a clear and repeatable methodology to determine whether the oil produced in a conventional CO2 enhanced oil recovery (CO2-EOR) operation can be classified as Net Carbon Negative Oil (NCNO). The report also summarizes the reservoir mass accounting methodology and the monitoring, verification, and accounting (MVA) methodology, which are critical elements that support the general objective and were conceived as project goals.
2007, American Journal of Science
Carbon dioxide (CO 2) sequestration is defined as the removal of gas that would be emitted into the atmosphere and its subsequent storage in a safe, sound place. CO 2 sequestration in underground formations is currently being considered to reduce the amount of CO 2 emitted into the atmosphere. However, a better understanding of the chemical and physical interactions between CO 2 , water, and formation rock is necessary before sequestration. These interactions can be evaluated by the change in mineral content in the water before and after injection, or from the change in well injectivity
2014, International Journal of Greenhouse Gas Control
2010, International Journal of Greenhouse Gas Control
2005, Proceedings of SPE Annual Technical Conference and Exhibition
2014, Critical Reviews in Environmental Science and Technology
2008, Environmental Geology
Carbon dioxide (CO2) storage in deep geological formations can lead to significant reductions in anthropogenic CO2 emissions if large amounts of CO2 can be stored. Estimates of the storage capacity are therefore essential to the evaluation of individual storage sites as well as the feasibility of the technology. One important limitation on the storage capacity is the radius of review, the lateral extent of the pressure perturbation, of the storage project. We show that pressure dissipation into ambient mudrocks retards lateral pressure propagation significantly and therefore increases the storage capacity. For a three-layer model of a reservoir surrounded by thick mudrocks, the far-field pressure is approximated well by a single-phase model. Through dimensional analysis and numerical simulations, we show that the lateral extent of the pressure front follows a power law that depends on a single dissipation parameter M / log 10 R k R S R 2 l À Á , where R k and R S are the ratios of mudrock to reservoir permeability and specific storage, and R l is the aspect ratio of the confined pressure plume. Both the coefficient and the exponent of the power law are sigmoid decreasing functions of M. The M values of typical storage sites are in the region where the power-law changes rapidly. The combination of large uncertainty in mudrock properties and the sigmoid shape leads to wide and strongly skewed probability distributions for the predicted radius of review and storage capacity. Therefore, if the lateral extent of the pressure front limits the storage capacity, the determination of the mudrock properties is an important component of site characterization.
2011, International Journal of Greenhouse Gas Control
2012, International Journal of Greenhouse Gas Control
2004
2012, SPE Journal
Summary Estimation of carbon dioxide (CO2)-storage capacity is a key step in the appraisal of CO2-storage sites. Different calculation methods may lead to widely diverging values. The compressibility method is a commonly used static method for estimating storage capacity of saline aquifers: It is simple, is easy to use, and requires a minimum of input data. Alternatively, a numerical reservoir simulation provides a dynamic method that includes Darcy flow calculations. More input data are required for dynamic simulation, and it is more computationally intensive, but it takes into account migration pathways and dissolution effects, so it is generally more accurate and more useful. For example, the CO2-migration plume may be used to identify appropriate monitoring techniques, and the analysis of the trapping mechanism for a certain site will help to optimize well location and the injection plan. Two hypothetical saline-aquifer storage sites in the UK, one in Lincolnshire and the other ...
2010, SPE EUROPEC/EAGE Annual Conference and Exhibition
Estimation of CO2 storage capacity is a key step in the appraisal of CO2 storage sites. Different calculation methods may lead to widely diverging values. The compressibility method is a commonly used static method for estimating storage capacity of saline aquifers: it is simple, easy to use and requires a minimum of input data. Alternatively, a numerical reservoir simulation provides a dynamic method which includes Darcy flow calculations. More input data are required for dynamic simulation, and it is more computationally ...
2011, International Journal of Chemical Engineering and Applications
In 2010, the California Energy Commission, via its PIER program, commissioned a study to evaluate the potential impact of large-scale CO2 sequestration in California, with specific focus on the water resources in the southern San Joaquin River Valley. The study work comprised two distinct, but related projects: The first project utilized production and pressure data from oil reservoirs in the San Joaquin Valley as a reverse analog to the potential pressure impact of CO2 injection. Results from this project are summarized in a companion report. The second project investigated (via simulation studies) whether the basin-scale pressure changes and brine displacement caused by future CO2 storage in the deep sediments could have an impact on the groundwater-surface water systems in the area. The current report summarizes the simulation studies conducted in the second project. The objective of this second project was to address the following questions: • Will vertical pressure propagation ...
2011, International Journal of Greenhouse Gas Control
2009, Energy Procedia
International Journal of Greenhouse Gas Control
2015, Journal of Molecular Liquids
2014, Energy Science & Engineering
Résumé — Récupération assistée du pétrole (EOR) et stockage du CO 2 dans des réservoirs pétroliers — L'injection de CO 2 dans des réservoirs pétroliers est une méthode efficace de récupération assistée du pétrole (EOR) et est utilisée par l'industrie pétrolière depuis une quarantaine d'années. La prise en compte des émissions de gaz à effet de serre dans l'atmosphère a mené à étudier ces dernières années le potentiel de cette méthode pour stocker durablement le CO 2 . Si les conditions de réservoirs sont adéquates, elle peut permettre à la fois d'augmenter notablement la récupération d'huile et de stocker définitivement du CO 2 dans les formations géologiques. La plupart des projets passés et actuels d'EOR utilisent du CO 2 peu coûteux et ont un résultat économique appréciable (167-227 sm 3 CO 2 /STB pétrole). Le potentiel de stockage du CO 2 associé à l'EOR est important, à peu près 60 % du CO 2 injecté est retenu dans le réservoir, en ne prenant pas...
2013, International Journal of Greenhouse Gas Control