Use of the DREAM Model for Control and Prediction of Concentrations and Environmental Risks Associated with Regular Discharges to Sea: Experiences and Challenges.

Rye, Henrik; Brönner, Ute; Ditlevsen, May Kristin; Frost, Tone Karin; Furuholt, Edgar; Kjeilen-Eilertsen, Grethe; Nepstad, Raymond; Page, Paul William; Paulsen, J.E.; Ramos, Robert; Rønningen, Petter; Sørstrøm, S.E.

doi:10.2118/170763-ms

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…For DC particles, sinking velocities are expected to be higher [40]. Overall, the concentration measured in the cones are in the order of magnitude of what is measured in the field on average in form of spikes above seabed during a drilling period [15,41].…”

Section: Plos Onementioning

confidence: 72%

Identification of tolerance levels on the cold-water coral Desmophyllum pertusum (Lophelia pertusa) from realistic exposure conditions to suspended bentonite, barite and drill cutting particles

et al. 2022

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Cold-water coral (CWC) reefs are numerous and widespread along the Norwegian continental shelf where oil and gas industry operate. Uncertainties exist regarding their impacts from operational discharges to drilling. Effect thresholds obtained from near-realistic exposure of suspended particle concentrations for use in coral risk modeling are particularly needed. Here, nubbins of Desmophyllum pertusum (Lophelia pertusa) were exposed shortly (5 days, 4h repeated pulses) to suspended particles (bentonite BE; barite BA, and drill cuttings DC) in the range of ~ 4 to ~ 60 mg.l-1 (actual concentration). Physiological responses (respiration rate, growth rate, mucus-related particulate organic carbon OC and particulate organic nitrogen ON) and polyp mortality were then measured 2 and 6 weeks post-exposure to assess long-term effects. Respiration and growth rates were not significantly different in any of the treatments tested compared to control. OC production was not affected in any treatment, but a significant increase of OC:ON in mucus produced by BE-exposed (23 and 48 mg.l-1) corals was revealed 2 weeks after exposure. Polyp mortality increased significantly at the two highest DC doses (19 and 49 mg.l-1) 2 and 6 weeks post-exposure but no significant difference was observed in any of the other treatments compared to the control. These findings are adding new knowledge on coral resilience to short realistic exposure of suspended drill particles and indicate overall a risk for long-term effects at a threshold of ~20 mg.l-1.

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Section: Plos Onementioning

confidence: 72%

Identification of tolerance levels on the cold-water coral Desmophyllum pertusum (Lophelia pertusa) from realistic exposure conditions to suspended bentonite, barite and drill cutting particles

et al. 2022

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Cooperation and compressed data exchange between multiple gliders used to map oil spills in the ocean

Wang

Thanyamanta

Bose

2022

Applied Ocean Research

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TRL (Technology Readiness Level) Assessment of DREAM (Dose-related Risk and Effects Assessment Model) to Qualify its Use for Modelling of Produced Water and Drilling Discharges

Kjeilen-Eilertsen¹,

Merzi

Burgos

et al. 2016

Day 1 Mon, April 11, 2016

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Use of DREAM (Dose-related Risk and Effects Assessment Model) for modelling of discharges to the marine environment is embraced by Norwegian authorities, and it is in routine use on the Norwegian Continental Shelf (NCS), as required by regulators. The DREAM model has been developed by SINTEF with support from industry, and covers both Produced Water and Drilling Discharges. In order to assess the maturity level and thus the acceptable perimeter of use of the DREAM model, an assessment of its Technology Readiness Level (TRL) was launched as part of the Company (TOTAL) recommended practices. The aim of applying the TRL is to ensure a robust evaluation of the maturity of technologies and software to be used. The Company TRL procedure is adapted from the method described by NASA, and is in accordance with methods used by other petroleum companies. A TRL assessment considers the maturity of a technology based on its concept, available documentation, pilot, validation and implementation level. Despite extensive use of the DREAM model, a technology pre-qualification (Pro-Qual) process in 2011 at TOTAL suggested the model being at a lower TRL level than anticipated, the main issue being related to validation of the model. Elements from the Pro-Qual led to launching the DREAM Charter Joint Industry Project (completed in the beginning of 2015) which assessed the uncertainties of the model, and validated its range of use. The TRL assessment was conducted after completion of the DREAM Charter project to see if the key aspects raised from the Pro-Qual process had been adequately addressed. Key aspect still is the validation of the DREAM model for Produced Water discharges, with the main concern being the lack of sufficient field data for comparison with modelled data. The drilling module of DREAM is to a large degree compared to actual field data, with four validation studies conducted (Rye et al., 2010, 2012 and 2014, Frost et al., 2014). Additional validation requirements, addressing modelling of Produced Water discharges in particular, have been defined, and a program will be presented. The outcome of the validation campaign will strengthen the confidence in the modelling tool and confirm the reliability of the simulation results and predictions for further on-site applications.

show abstract

Use of the DREAM Model for Control and Prediction of Concentrations and Environmental Risks Associated with Regular Discharges to Sea: Experiences and Challenges.

Cited by 4 publications

References 10 publications

Identification of tolerance levels on the cold-water coral Desmophyllum pertusum (Lophelia pertusa) from realistic exposure conditions to suspended bentonite, barite and drill cutting particles

Identification of tolerance levels on the cold-water coral Desmophyllum pertusum (Lophelia pertusa) from realistic exposure conditions to suspended bentonite, barite and drill cutting particles

Cooperation and compressed data exchange between multiple gliders used to map oil spills in the ocean

TRL (Technology Readiness Level) Assessment of DREAM (Dose-related Risk and Effects Assessment Model) to Qualify its Use for Modelling of Produced Water and Drilling Discharges

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