UNDERWATER GLIDER PLATFORM SURVEY FOR OIL & GAS EXPLORATION. Philippe LATTES, Vianney ROCHET OI London 2016

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1 UNDERWATER GLIDER PLATFORM SURVEY FOR OIL & GAS EXPLORATION

2 UNDERWATER GLIDER TECHNOLOGY SEA EXPLORER KEY FEATURES : - Autonomous underwater glider supervised and piloted from shore using a web-bases interface and satellite communications. - Persistent collection of data (physical, chemical, biological, acoustics ) along a cut of the water column (700m). - Long Range (more than 1 000Km) and High Endurance (months) UUV - Very cost effective data collection equipment (no supervising ship at sea : Ship rental, crew fuel costs) APPLICATIONS : - Marine sciences, Oceanography, Oil&Gas, Defense 2

3 UNDERWATER GLIDER TECHNOLOGY FEATURES - Length: 2.7 m (Including foldable mast) - Weight : 59 kg in air - Wingspan : 56 cm Soft fins Pressure resistant hull Foldable mast Safety Drop weight Fairing 3

4 UNDERWATER GLIDER TECHNOLOGY GENERAL PRINCIPLES : Propulsion: Thrust provided by buoyancy variation - Vehicle heavy: It glides down following a slope - Vehicle buoyant: It glides up to the surface following a slope Navigation: Pitch and Roll (for heading) are set by displacing the moving mass position - Pitch: moving mass positioned at rear / front, SeaEplorer pitch up/down, - Roll: moving mass positioned on port or starboard. 4

5 UNDERWATER GLIDER TECHNOLOGY COMMUNICATION & SUPERVISION : - Iridium call between shore and glider - Pilot can configure waypoints and navigation profiles - Near real-time Navigation and Sensor data from vehicle to server Pilot 0 m WP 2 WP m Basic instructions Automation of piloting 700 m Heading (Waypoint) Depth Ballasting volume Pitch angle Surfacing for comm Payload ON/OFF Instructions to glider Files downloading Drift correction WP m WP 5 30 m WP 4 Navigation mode: - Surveying - Virtual mooring - Seabedanchored - Deep/Surface drifting 5

6 UNDERWATER GLIDER TECHNOLOGY LIGHT OPERATION AND RECONDITIONING Launch Glide Communication Recovery 6

7 20 km UNDERWATER GLIDER TECHNOLOGY Glider 1 ENVIRONMENTAL BASELINE STUDIES (EBS) For mapping and tracking environmental parameters 150 km Glider EMERGENCY PLAN For tracking Oil plume with 3D modeling Glider 2 Glider 3 Sound recording 3D mapping of oil plume METOCEAN FOR OFFSHORE Design of the offshore structure Assistance during installation and marine operation Typical metocean data Wave and Current Traditional Monitoring means: Buoys, Current mooring Advantage of the Glider compared to traditional means Acquire data in Real Time Mapping of a large area. Require LOW logistic operations Low costs for deployment and maintenance ENVIRONMENTAL MONITORING For early detection of oil seepages during drilling operations Current No interference with offshore facilities NAPHtalene chart in ug/l 7

8 SEA EXPLORER SURVEY FOR OIL & GAS EXPLORATION SURVEY SITE: - Objectives: Detection of natural seep for pre-exploration survey - Challenges: Low logistics and cost - Survey Area: 800km² for a water depth of 800m to 1500m - Glider technology: Monitoring from surface down to 700m for long-term mission deployment diving Survey Area : 800 km² recovery Glider opérational at sea : 20 days 8

9 SEA EXPLORER SURVEY FOR OIL & GAS EXPLORATION ACQUISITION STRATEGY The mission took place in June 2015 for 20 days. Two SeaExplorer gliders were deployed : ACQUISITION STRATEGY PRINCIPLE - GLIDER N 1: navigates on vertical section (North-South) and has been deployed on site. - GLIDER N 2: navigates on horizontal section (East-West). It has been deployed in coastal water to demonstrate the capability of the glider to reach autonomously the survey area. Distance Profiles (0-700m) 1000 km 1000 profiles Profiles density (over 720 km²) Line Spacing Surfacing Spacing Redundancy of measurement 1,4 profiles/km² ~ 2 km ~ 2 km 2 Gliders deployed Surfacing positions of the two gliders GLIDER N 1 (left) and GLIDER N 2 (right). 9

10 SEA EXPLORER SURVEY FOR OIL & GAS EXPLORATION INTEGRATED SENSORS : SEABIRD CTD Conductivity, Temperature and Depth SEABIRD DO Dissolved Oxygen ALTIMETER MINIFLUO SENSOR Detection of the following contaminants: Hydrocarbons (PHEnantrene, NAPHtalène) Sewage (TRYptophane) High Accuracy (PHE detection limit 0.1 µg/l) Small Footprint (Puck port, 300g) Low Consumption (0,5W) 10

11 Basic Principles Concept and appllication formulation Concept validation Experimental pilot Demonstration pilot Industrial pilot SEA EXPLORER SURVEY FOR OIL & GAS EXPLORATION TECHNOLOGY READINESS LEVEL (TRL) Phase Research Development Deployment TRL Description First implementation A few record of implementation Extensive implementation TRL 8 Actual system completed and "mission qualified" through test and demonstration in an operational environment (ground or space): End of system development. Fully integrated with operational hardware and software systems. Most user documentation, training documentation, and maintenance documentation completed. All functionality tested in simulated and operational scenarios. Verification and Validation (V&V) completed. TRL9 Live Product: The Système is being used and validated in a wide range of operational field cases. Substaining processes for updates, fixes and enhancements are running. MINIFLUO SENSOR Detection of Hydrocarbons contaminants SEAEXPLORER GLIDER Underwater Technology SEABIRD CTD Conductivity, Temperature and Depth SEABIRD DO Dissolved Oxygen 11

12 SEA EXPLORER SURVEY FOR OIL & GAS EXPLORATION OCEANOGRAPHIC CONTEXT SS (left) and ST (right) at 100m depth from MFS model during glider operation. Three major processes: - Two anticylonic eddies detected. - Current advected low salinity waters from the west. - Impact on eddy on the temperature and salinity are clearly visible with higher values. 12

13 SEA EXPLORER SURVEY FOR OIL & GAS EXPLORATION PHYSICAL VARIABLES - water temperature between 200 and 400m shows a high variability during the mission, with a clear spatial variability over the study area. This variability is linked to the presence of an eddy in this zone - The concentration of DO reaches a maximum between 50 and 100m depth, for both gliders, and then decreases regularly. - Temperature of GLIDER N 1 + N 2 interpolated on the entire area. - In deeper layers, temperature remains stable over the time. As a consequence, the previous identified gyre is well described below the surface in the south-west of the zone, up to 500m depth. 13

14 SEA EXPLORER SURVEY FOR OIL & GAS EXPLORATION PAH DETECTION - As the glider performed this 2 x 20km long transect in two days. - The signal measured is very low - X axis is in longitude, the signal is integrated over the different passes. GLIDER N 1 Trajectory sample, associated Section and Profiles 14

15 SEA EXPLORER SURVEY FOR OIL & GAS EXPLORATION PAH DETECTION - The glider goes north and south, the following picture show no strong symmetry along this transect - The signal measured is very low - The representation of the signal below is along the trajectory. The x-axis corresponds to a distance. GLIDER N 2 Trajectory sample, associated Section and Profiles 15

16 SEA EXPLORER SURVEY FOR OIL & GAS EXPLORATION PAH DETECTION - This is the only reasonable detection during the mission - The signal can be observed from surface to 250m with maximum at 200m depth - However there is no detection during the previous nor the next profile. GLIDER N 2 position (Upper Left) and YOs (Lower Left) of Phenanthrene detection, associated Profiles (Right) 16

17 SEA EXPLORER SURVEY FOR OIL & GAS EXPLORATION CONCLUSION - This survey enabled to provide a detailed view of the exploration block for Hydrocarbon and physical parameters during 20 days with a spatial coverage of 24 x 48 Km. - The physical variables measured by the gliders were in very good agreement with the values from the literature and other data sources (satellite observations, in situ measurements, ocean models). - gliders data described in detail the presence of a deep gyre in the south west of the navigation zone. No detection was clearly apparent over the navigation zone during the mission. These variables remain in the concentration range normally encountered in the area. Future challenges: To be ready for deep and ultra-deep gliders down to 5000m for Oil&Gaz exploration survey 17

18 THANK YOU 18