Hypothesis/Experiment

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1 Investigating Regional Seafloor Hazards Using NOAA Multibeam Data and the Relationship of These Detected Seafloor Hazards with Oil and Gas Installations in the Gulf Of Mexico. Erick Huchzermeyer

2 Hypothesis/Experiment Can multibeam seep studies actually be used to help predict the feasibility of seabed infrastructure installation? Hypothesis Multibeam data that includes water column, backscatter, and bathymetry can provide insight into the feasibility of subsea infrastructure. Experiment interpret seabed hazards from NOAA bathymetry/seep surveys in the Gulf of Mexico and ground truth the results with existing oilfield infrastructure.

3 NOAA surveys

4 EX1105 Processing Results

5 EX1402L2/L3 Processing Results

6 EX1402L2/L3 Processing Results

7 Interpretation Methods - Hardgrounds High reflectivity Related to, seafloor faults, chaotic seafloor, seeps, or near expulsion feature chaotic appearance, or aligned in a direction not large homogenous area

8 Interpretation Methods Hardgrounds

9 Interpretation Methods Slumps Medium to high seafloor reflectance. The slump debris proceeds downhill and was homogenous in reflectance. A detachment scarp is visible in the bathymetric data.

10 Interpretation Methods Pockmarks Localized depression visible in bathymetry The interior has medium to low reflectance. No seeps identified with the feature

11 Interpretation Results EX1105

12 Interpretation Results EX1105

13 Interpretation Results EX140L2/L3

14 Interpretation Results EX140L2/L3

15 Overall Hazard Area Survey Area Gradient over 10 Hardgrounds Percent Of Survey EX % 1.5% 11.1% EX1402L2/L3 7.0% 3.9% 25.9% Combined 6.0% 3.3% 22.4% All Hazards Plus Avoidance Radius

16 Hazard Area Compared to Existing Wellsites

17 By Block Hazard EX1105

18 By Block Hazard EX1402L2/L3

19 Infrastructure Examples

20 Infrastructure Examples

21 Infrastructure Examples

22 Sources Mineral Management Service, NTL No G05, Shallow Hazards Program, [pdf]. Available: Mineral Management Service, NTL No G07, Archaeological Resource Surveys and Reports, [pdf]. Available: Mineral Management Service, NTL No G40, Deepwater Benthic Communities, [pdf]. Available: Lessees/2009/09-G40.aspx NOAA Office of Ocean Exploration and Research, Water Column Sonar Data Collection (EX1105, EM302). National Centers for Environmental Information, NOAA. Doi: /V5736NW3. Accessed on September 19, NOAA Office of Ocean Exploration and Research, Water Column Sonar Data Collection (EX1402L2, EM302). National Geophysical Data Center, NOAA. Doi: /V5HQ3WTN. Accessed on September 16, 2015 NOAA Office of Ocean Exploration and Research (OER), Multibeam Sonar Bathymetry Data collected aboard Okeanos Explorer (EX1402L2). NOAA National Centers for Environmental Information. Available: NOAA Office of Ocean Exploration and Research (OER), Multibeam Sonar Bathymetry Data collected aboard Okeanos Explorer (EX1402L3). NOAA National Centers for Environmental Information. Available: National Oceanic and Atmospheric Administration, Multibeam Sonar Bathymetry Data collected aboard Okeanos Explorer (EX1105 ). NOAA National Centers for Environmental Information. Available:

23 Sources Bureau of Ocean Energy Management, Borehole, [textfile]. Available: Bureau of Safety and Environmental Enforcement (BSEE), Gulf of Mexico Regional Office, Field Operations, Platforms Gulf of Mexico NAD27. [shapefile], Available: Bureau of Safety and Environmental Enforcement, Gulf of Mexico Regional Office, Field Operations, Platforms Gulf of Mexico NAD27. [shapefile], Available: Bureau of Ocean Energy Management, Gulf of Mexico OCS Region; Office of Leasing & Plans, Mapping & Automation Section, LEASES (Active Leases Polygon), [shapefile]. Available: Bureau of Ocean Energy Management, Mapping and Boundary Branch, Gulf of Mexico OCS Blocks. [shapefile], Available: Bureau of Ocean Energy Management, Mapping and Boundary Branch, Digital Offshore Cadastre (DOC) GOM NAD27 Official Protraction Diagram (OPD) Outlines Unclipped Gulf of Mexico OCS Protractions, [shapefile]. Available: Bureau of Ocean Energy Management, BOEM Seafloor Anomalies Layer Package (Dec 2016), [ArcGIS Layer Package]. Available:

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