Efficient marine environmental characterisation to support monitoring of geological CO2 storage

Blackford, Jerry; Huvenne, Veerle A.I.; Lichtschlag, Anna; Strong, James Asa; Alendal, Guttorm; Schütz, Sigrid Eskeland; Oleynik, Anna; Dankel, Dorothy

doi:10.1016/j.ijggc.2021.103388

Cited by 10 publications

(5 citation statements)

References 137 publications

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“…In the long-term injection phase of the CS-D experiment, geochemical monitoring was essential to resolve the main coupled physical and chemical processes. Further, the range of parameters measured proved valuable and sole reliance on CO 2 measurements during monitoring can be misleading since CO 2 is ubiquitous in the environment and can exhibit large natural variability 62 . Therefore, the applied multi-tracer approach was necessary to allow differentiation between the different CO 2 sources and further allowed resolving temporal scales of the ongoing processes at the scale of the experimental setup.…”

Section: Discussionmentioning

confidence: 99%

In-situ experiment reveals CO2 enriched fluid migration in faulted caprock

Weber,

Rinaldi,

Roques

et al. 2023

Sci Rep

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The sealing characteristics of the geological formation located above a CO2 storage reservoir, the so-called caprock, are essential to ensure efficient geological carbon storage. If CO2 were to leak through the caprock, temporal changes in fluid geochemistry can reveal fundamental information on migration mechanisms and induced fluid–rock interactions. Here, we present the results from a unique in-situ injection experiment, where CO2-enriched fluid was continuously injected in a faulted caprock analogue. Our results show that the CO2 migration follows complex pathways within the fault structure. The joint analysis of noble gases, ion concentrations and carbon isotopes allow us to quantify mixing between injected CO2-enriched fluid and resident formation water and to describe the temporal evolution of water–rock interaction processes. The results presented here are a crucial complement to the geophysical monitoring at the fracture scale highlighting a unique migration of CO2 in fault zones.

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Section: Discussionmentioning

confidence: 99%

In-situ experiment reveals CO2 enriched fluid migration in faulted caprock

Weber,

Rinaldi,

Roques

et al. 2023

Sci Rep

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“…In addition, towed instruments are capable of detecting seafloor discharges and bubble columns in the seawater, 25 and modeled effects of leakage into the water column have begun. 16,26…”

Section: Offshore Advantagesmentioning

confidence: 99%

“…The ongoing GoMCARB offshore CO 2 study intends to utilize extremely high‐resolution seismic data collected for the shallower stratigraphic intervals to identify geologic fluid migration pathways, thus providing insight into longterm fate of injected CO 2 . In addition, towed instruments are capable of detecting seafloor discharges and bubble columns in the seawater, 25 and modeled effects of leakage into the water column have begun 16,26 …”

Section: Introductionmentioning

confidence: 99%

Mapping existing wellbore locations to compare technical risks between onshore and offshore CCS activities in Texas

et al. 2023

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Carbon dioxide capture and geologic storage (CCS; geologic sequestration) is a promising technology for reducing anthropogenic greenhouse gas emissions to the atmosphere from industrial point sources. Aspects of CCS have been investigated for over two decades, and many large‐ and small‐scale geologic storage field demonstration projects are now underway globally. Interest in offshore CCS has been increasing in recent years (e.g., European Union, Australia, Japan, and the United States). Deep geologic storage in offshore settings is analogous to onshore CCS activities in many respects (i.e., geologic and geotechnical aspects), but is distinct from previously explored seabed sediment CO2 storage) or deep marine dissolution). Given the large subsurface geologic storage volumes available in offshore settings, much discussion of offshore CCS is focused on the benefits and risks of such activity compared to onshore settings. Similar to onshore settings, existing (legacy) wells likely present the most direct migration pathway and largest risk of noncontainment in offshore settings. As part of current studies to evaluate geologic storage options in offshore settings along the Texas coast and greater Gulf of Mexico (GoM), mapping of the geographic distribution and ages of wells in a region containing coastal counties and extending 30 miles offshore Texas indicates that both well spatial density and well age decrease moving from onshore to offshore. Results suggest reduced risk of leakage owing to more rigorous and documented well completion and abandonment practices for these generally younger wells (although many are decades old). A result of decreased well density is that larger areas are available for leasing for CCS projects that avoid legacy wells altogether (> 1 mile from any existing well). The one‐mile designation is used as an arbitrary convention, and while it is recognized that this is smaller than a typical area of review (AoR) for permitting, each site will have a different AoR radius for consideration. The combination of large subsurface storage volumes under control of a single landowner and reduced risks from legacy wells makes offshore CCS attractive in the GoM. © 2023 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…In the long-term injection phase of the CS-D experiment, the geochemical monitoring was essential to resolve the main coupled physical and chemical processes. Further, the range of parameters measured proved valuable and sole reliance on CO 2 measurements during monitoring can be misleading since CO 2 is ubiquitous in the environment and can exhibit large natural variability [61].…”

Section: Monitoring Of Co 2 Leakage Through Caprocks: Lessons Learned...mentioning

confidence: 99%

Geochemical Insight into CO2 Migration in a Faulted Caprock

Weber

Rinaldi

Roques

et al. 2022

Preprint

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The sealing characteristics of the geological formation located above a CO2 storage reservoir, the so-called caprock, are essential to ensure efficient geological carbon storage. In case CO2 were to leak through the caprock, temporal changes in fluid geochemistry can reveal fundamental information on migration mechanisms and induced fuid-rock interactions. Here, we present the results from a unique in-situ injection experiment, where CO2-enriched fluid was continuously injected in a faulted caprock analogue. Results show that the CO2 migration follows complex path- ways within the fault structure. The joint analysis of noble gases, ion concentrations and carbon isotopes allow us to quantify mixing between injected CO2-enriched fluid and resident formation water and to describe the temporal evolution of water-rock interaction processes. The results presented here are a crucial complement to the geophysical monitoring at the fracture scale highlighting a unique migration of CO2 in fault zones.

show abstract

Efficient marine environmental characterisation to support monitoring of geological CO2 storage

Cited by 10 publications

References 137 publications

In-situ experiment reveals CO2 enriched fluid migration in faulted caprock

In-situ experiment reveals CO2 enriched fluid migration in faulted caprock

Mapping existing wellbore locations to compare technical risks between onshore and offshore CCS activities in Texas

Geochemical Insight into CO2 Migration in a Faulted Caprock

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