Environmental Assessment of CO2 Storage Site: Specific Monitoring Program and Study Needed to Assess Environmental Impacts

2010 ◽  
Author(s):  
Natalia Quisel ◽  
Nicolas Rampnoux ◽  
Stephane Thomas
Geophysics ◽  
2013 ◽  
Vol 78 (3) ◽  
pp. WB77-WB87 ◽  
Author(s):  
Nikita Chugunov ◽  
Yusuf Bilgin Altundas ◽  
T. S. Ramakrishnan ◽  
Ozgur Senel

Quantification of reservoir uncertainty is an essential part of a monitoring design. A systematic approach that quantitatively links predicted uncertainties in a monitoring program to the underlying reservoir variability is, however, needed. We developed a methodology for quantifying uncertainty in crosswell seismic monitoring combined with neutron-capture logging and applied global sensitivity analysis (GSA) to compute and rank contributions of uncertain reservoir parameters to the predicted uncertainty of the measurements. The workflow is illustrated by a numerical study using a simplified model of a [Formula: see text] storage site where crosswell measurements have not actually been taken. Synthetic seismic responses are computed through the integration of multiphase flow, a new thermodynamically consistent fluid substitution model, and a fast marching eikonal solver. We quantified uncertainty in first-arrival times to illustrate the potential utility of crosswell seismic surveys and their limitation. Consistent with these calculations, uncertainties in neutron capture cross-section logs are also computed and related to predicted [Formula: see text] migration. The predicted uncertainty range for neutron-capture measurements indicated significant sensitivity to the uncertainty of the reservoir properties (standard deviations [STDs] of up to 6 c.u. in the injector and up to 3.5 c.u. in the monitoring well). However, the STD of predicted time-lapse crosswell seismic responses for two different source locations did not exceed 0.75 ms during the life of the project, suggesting limited value of first-arrival measurements for reservoir-parameter inversion in this case. With the time-dependent uncertainty of the predicted measurements, calculated GSA indices provided a quantitative basis for the monitoring program design. Practical implications of GSA results for model reduction and subsequent inversion were also evaluated.


2016 ◽  
Vol 51 ◽  
pp. 193-206 ◽  
Author(s):  
Vince R. Vermeul ◽  
James E. Amonette ◽  
Chris E. Strickland ◽  
Mark D. Williams ◽  
Alain Bonneville

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3433
Author(s):  
Ulrich Weber ◽  
Niko Kampman ◽  
Anja Sundal

A comprehensive monitoring program is an integral part of the safe operation of geological CO2 storage projects. Noble gases can be used as geochemical tracers to detect a CO2 anomaly and identify its origin, since they display unique signatures in the injected CO2 and naturally occurring geological fluids and gases of the storage site complex. In this study, we assess and demonstrate the suitability of noble gases in source identification of CO2 anomalies even when natural variability and analytical uncertainties are considered. Explicitly, injected CO2 becomes distinguishable from shallow fluids (e.g., subsea gas seeps) due to its inheritance of the radiogenic signature (e.g., high He) of deep crustal fluids by equilibration with the formation water. This equilibration also results in the CO2 inheriting a distinct Xe concentration and Xe/noble gas elemental ratios, which enable the CO2 to be differentiated from deep crustal hydrocarbon gases that may be in the vicinity of a storage reservoir. However, the derivation has uncertainties that may make the latter distinction less reliable. These uncertainties would be best and most economically addressed by coinjection of Xe with a distinct isotope ratio into the CO2 stream. However, such a tracer addition would add significant cost to monitoring programs of currently operating storage projects by up to 70% (i.e., from 1 $US/t to 1.7 $US/t).


2014 ◽  
Vol 16 (03) ◽  
pp. 1450027 ◽  
Author(s):  
STEVE SWAIN ◽  
RIKI THERIVEL

Emergency plans are exempt from undergoing Strategic Environmental Assessment (SEA). However, the measures they include to minimise the effects of disasters can have environmental impacts. The study underlying this paper assessed UK emergency plans for their possible environmental impacts, identified which types of plan would not fulfil the criteria necessary to require SEA and which ones would but are then exempt. Further consideration of the likely practical involvement of environmental authorities in the plan-making process of regulated processes and in emergency responses provided a view on whether the SEA exemption results in environmental impacts not being minimised. This work has highlighted that the implementation of emergency plans is as important as the plans themselves in terms of providing scope for the protection of the environment for the management of spatially generic disasters. Site-specific disaster management tends to include detailed environmental protection measures through regulatory processes.


2020 ◽  
Author(s):  
Guttorm Alendal ◽  
Jerry Blackford ◽  
Stefan Carpentier ◽  
Holger Cremer ◽  
Dorothy J. Dankel ◽  
...  

<p>We will report on preliminary results and present plans for the continuation of an international project, ACTOM. The overall objective of ACTOM is to develop internationally applicable capabilities to design and execute adequate, rigorous and cost-effective monitoring of offshore carbon storage projects, aligning industrial, societal and regulative expectations with technological capabilities and limitations.</p><p>At the core of the project is a web based pre-operational tool-kit that will deliver new abilities to design a site specific marine monitoring program that will ultimately:</p><ul><li>enable regulators to quantifiably assess that a proposed monitoring strategy delivers an acceptable standard of assurance,</li> <li>enable operators to properly plan, cost and adapt monitoring strategies to site specific circumstances,</li> <li>enable regulators and operators to communicate to the effectiveness of proposed monitoring strategies to enable informed societal consensus in view of marine spatial planning.</li> </ul><p><em>Responsible Research and Innovation (RRI)</em> is an approach to anticipate and assess implications and expectations of new technologies on the society, a framework increasingly being used in marine environmental studies and in biotechnology and innovation. We use this framework on Carbon Capture Usage and Storage (CCUS), considering the technology in view of the UN Sustainable Development Goals. In an extension of this, potential legal conflicts between storage projects or other uses of the seas, will be addressed in view of marine spatial planning. </p><p>By viewing CCUS and offshore storage in view of Sustainable Development Goals (SDG) and in the RRI framework, the aim is to ease communicating the benefits of the technology while addressing the uncertainties and risks in a coherent way.</p><p><em>This work is part of the project ACTOM, funded through the ACT programme (Accelerating CCS Technologies, Horizon2020 Project No 294766). Financial contributions made from; The Research Council of Norway, (RCN), Norway, Netherlands Enterprise Agency (RVO), Netherlands, Department for Business, Energy & Industrial Strategy (BEIS) together with extra funding from NERC and EPSRC research councils, United Kingdom, US-Department of Energy (US-DOE), USA. In-kind contributions from the University of Bergen are gratefully acknowledged.</em></p>


2019 ◽  
Author(s):  
Niklas Heinemann ◽  
Hazel Robertson ◽  
Juan Alcalde ◽  
Alan James ◽  
Saeed Ghanbari ◽  
...  

2019 ◽  
Author(s):  
Bernd Wiese ◽  
Wolfgang Weinzierl ◽  
Cornelia Schmidt-Hattenberger

2021 ◽  
Vol 24 ◽  
pp. e00360
Author(s):  
Guilherme M. Sanches ◽  
Paulo S.G. Magalhães ◽  
Oriel T. Kolln ◽  
Rafael Otto ◽  
Francelino Rodrigues ◽  
...  

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