Peregrino Environmental Monitoring of Calcareous Algae PEMCA

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Dustin Chapman
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1 Peregrino Environmental Monitoring of Calcareous Algae PEMCA

2 Agenda Presentation Introduction and Background Carachteristics Objectives Partners Results and Discussion Conclusions Contributions from the Project 2

3 Presentation Developed by Statoil through R&D clause established by Concession Agreement for Peregrino Field; Implemented as part of the Environmental Monitoring Programme ( PMA ) from drilling activities; Main activities: Laboratory studies on the taxonomy and effects from exposure to drill cuttings. Development of new tecnologies for monitoring the potential impact from drill cuttings discharge. 3

Introduction and Background Presence of a calcareous algae bank in Peregrino field; Models did not show pile of cuttings over the calcareous algae bank; Gaps in scientific knowledge on calcareous

4 Introduction and Background Presence of a calcareous algae bank in Peregrino field; Models did not show pile of cuttings over the calcareous algae bank; Gaps in scientific knowledge on calcareous algae in Brazil; Lack of technology developed to test in laboratory the effects of drill cuttings discharge over calcareous algae February/2010 to september/2013 Challenges for monitoring the rodoliths bank on Peregrino Field; 4

5 Background Previous experience on deep sea corals (Lophelia pertusa) monitoring along NCS 5

6 6 Peregrino Field

7 Calcareous Algae (rodoliths) Red algae calcite crystals that form crusts Live surface reddish X internal part dead and colourless 7

8 Objectives Identify relevant species on Peregrino subsea environments (water column and sediments); Establish a methodology for calcareous algae laboratory culture and its associated fauna; Establish limit levels for both acute and chronic toxicity of the drilling cuttings detritus regarding calcareous algae and its associated species; Develop and test a real time technology for the environmental monitoring of the calcareous algae and its associated fauna. 8

9 Partners Jardim Botânico do Rio de Janeiro (JBRJ) LABTOX Instituto de Biodiversidade Marinha Instituto de Estudos do Mar Almirante Paulo Moreira (IEAPM) Imagem Image Universidade de São Paulo (USP) Universidade de Bielelfeld - GER Prooceano SINTEF METAS 9

10 Results and Discussion Taxonomy: Over 200 species identified 2 new species to science cv Digital catalogue published cv 10

11 11

12 Results and Discussion Long term tests: light reduction x water flow X sediment coverage Mesoscale flow system Results show effect on algae are caused by burial; and Type of sediment and toxic compounds have minor importance 12

13 Results and Discussion Long term tests: Regression Multivariate models Highest contribution to fluorescence reduction sediment added Non-linear relation Water flow and light minor impact Tendency to recovery of fluorescence adaptation to reduced light 13

14 Results and Discussion Long term tests: Environmental relevance related to fluorescence as a function of sediment coverage Establishment of limits and impact categories for env. monitoring Cobertura sedimentar (%) kg.m -2 mm 5 4,0 3,8 10 8,0 7, ,1 9, ,1 10, ,0 12,2 Accumulated sedimentation on the Field is of aproximately 0,1 kg.m -2 in 3 months, hence below reference. Most of the suspension material is from natural sedimentation. 14

and movement Visual observation of the habitat Lander Seafloor Structure Radius Ø: 2,5 m

15 In situ Monitoring: Lander Several sensor systems for: Turbidity Light intensity Temperature Salinity Ocean currents on different layers Particle concentration Composing and movement Visual observation of the habitat Lander Seafloor Structure Radius Ø: 2,5 m Height: 2,5 m Weight: 3 ton 4 campaigns to retrieve and launch the lander for data collection 15

16 In situ Monitoring: Lander Main results: Images registered that rodoliths can move (rolling movements) Probably responsible for removing the particulate over the calcareous algae Quantification of movement significant for risk analysis cvc 16

17 Results Lander Desenvolvimento de tecnologia: New lander model: 70% lighter(800kg) and ROV independent. 1 st launch in Other projects: o Kristin Field - Norway o Troll Field - Norway o Abu Dhabi c 17

In situ Monitoring: Sand traps 3 traps originally monitoring of natural sedimentation and potential imput from particulate discharges Sampling for: Volume and particle size analysis C and N

18 In situ Monitoring: Sand traps 3 traps originally monitoring of natural sedimentation and potential imput from particulate discharges Sampling for: Volume and particle size analysis C and N Hydrocarbons (n-alcans and PAHs) Barium contents (presence of barite?) 12 weeks on seabed 20 samples every 3 to 5 days 7 cruises performed for launching and recovery Imagem Image cvc No significant variation observed among sand traps and cruises, except for barium drilling activities? 18

19 DREAM Model Inputs for the modelling of first 2 years of discharge: Daily discharges from Peregrino A and B Current data from 2 years Output: Maps showing deposition on seabed as a function of time. Two main goals: Correlation of the sediment distribution from drilling particulates from the modelling with observations from Lander and Sand traps; Study of the general distribution and environmental risk of drilling particulates of Peregrino activities. 19

20 20 Results from DREAM Model

21 Modelling Results from pre-drilling phase Peregrino A Peregrino B 21

22 Risk Analysis Categories for impact assessment: None: 0-10% coverage Minor: % coverage Moderate: 30-50% coverage Severe: >50% coverage Correspondence Table Categorias de impacto Cobertura sedimentar (%) kg.m -2 mm Nenhum ,5 Menor (amarelo) ,5 10,4 Médio (laranja) ,4 12,2 Grave (vermelho) >12,2 22

Risk analysis Categories for impact assessment: None: 0-10% coverage Minor: 10-30

23 Risk analysis Categories for impact assessment: None: 0-10% coverage Minor: % coverage Moderate: 30-50% coverage Severe: >50% coverage Conservative approach 23

24 Conclusions The calcareous algae bank represents a rich biological habitat of high biodiversity. Calcareous algae are relatively robust species considering resistance to sedimentation. Calcareous algae have a self-cleaning capacity using its rolling movements by the currents to continuously clean itself from sediment. No evidence of contribution from the drilling activities could be found both in sediment traps and lander. The technology developed and delivered by PEMCA project enables calcareous algae monitoring in similar situations. 24

25 Contributions of the Project Technology delivered for laboratory testing Technology improved for subsea monitoring Over 10 studentship supports by the project Over 20 scientific publications and others under analysis A technical group was established by the Brazilian Environmental Ministry (MMA) and the Brazilian Institute for Petroleoum, Gas and Biofuels (IBP) a technical group to work on the topic. Statoil is currently leading this work group by IBP side based on our experience with PEMCA project. Publication of Digital Catalogue of the Benthic Marine Life in Peregrino Field, Campos Basin, Brazil. 25

Ana Paula B. Pinto DPI SSU BRA SER abpi@statoil.

26 Ana Paula B. Pinto DPI SSU BRA SER Tel:

A Time Series Study of Lophelia pertusa and Reef Megafauna Responses to Drill Cuttings Exposure on the Norwegian Margin

RESEARCH ARTICLE A Time Series Study of Lophelia pertusa and Reef Megafauna Responses to Drill Cuttings Exposure on the Norwegian Margin Autun Purser* Oceanlab, Jacobs University, Bremen, Germany * a.purser@jacobs-university.de