Sounding Out Risk for Offshore Installations Introduction to PanGeo Technology • Acoustic Corer May 2016 PPT-07251 1
O UR M ARKE S AND O UR E XPANDING F T OOT PRINT Ne wfoundla nd, Ca na da : Abe rde e n, Sc otla nd: Corpora te He a dqua rte rs. Globa l Ope ra tions & Sa le s Ope ra tion Support, Da ta Inte rpre ta tion & Proc e ssing , Sa le s & Ma rke ting Barents Sea North Sea Baltic Sea East Coast Canada / North East USA GOM Middle East West APAC Africa Brazil Doha , Qa ta r: Sa le s
P AN G E O ’ S 3D A COUST IC T OGY : S UB - S E D I E CHNOL ABE MAGING • Technology development and service delivery company specializing in 3D acoustic imaging solutions • Established in 2006: Technology commercialized in 2011 with “Zero LTI” and strong market validation • Headquartered in St John’s, Newfoundland Canada with an operational base in Aberdeen, Scotland and sales office in Qatar. Industry partners and agents to service GOM, Nigeria and APAC. Ac oustic Core r • Sub-seabed 3D imaging: Acquires acoustic core 12 m in diameter to depth up to 30 m • Application: Micro Site Investigations to identifying geo-hazards for pile installations both in Oil & Gas / Renewables Energy Mitigating risk for offshore installations and creating value for seabed survey activities
P ROBLEMS W ITH C OMPLEX S EABEDS : L EAD TO UNCERTAIN ty Buried Spudcan Footprints: Rig Move Risk Buried Boulders: Installation challenges Thinning Beds Over Cavities/Voids: Grout loss Weak Soils: Punch throughs Variable Geotechnical Properties: Foundation Design Uncertainty
T HE C ONSEQUENCE O F U NCERTAINTY • At best……uncertainties in seabed conditions lead to cost overruns and schedule delays • At worst….. damage to or loss of infrastructure … survey data inadequate in predicting foundation installation conditions
I NDUSTRY P ULL TO E NHANCE S ITE I NVESTIGATION ► A COUSTIC C ORER Ge o Ha za rd Surve ying Complements Boreholes & CPTS (Ac o ustic Co rer) Se a be d Ma pping Soil Me c ha nic s T e c hnolog y Ga p Insta lla tion (Co ntinuo us Se ismic ) (Bo reho les & CPT ’s) Wide lateral area acoustic core Conventional Sub-bottom Conventional Sampling Profiling Lacks Resolution Lacks Coverage Mitigates risks by providing high-resolution image of sub-seabed layers and geohazards in a large volume acoustic core
U NIQUE F USION O F D ATA D ESCRIBES A C OMPLEX S EABED • Imaging Geohazards � Cavities/Voids � Boulders (20cm) � Gassy soils � Unexploded ordnance (UXO) • Delineating subsea stratigraphy � Bedrock (chalk) � Discontinuous permafrost � Gravel/cobble layers � Dipping Slippage Planes/Beds ...this characterizes the true sediment variability through a volume Petrel Software showing topography plots of buried geological surfaces: Lower Sand Unit – Mudstone Interface
T HE A COUSTIC P LATFORM : S TATIONARY D ATA A CQUISITION High and low frequency chirp sonar projectors, parametric source and hydrophone arrays
M 3D QC V ISUAL OOK T F IRST L IZAT ION Relative Acoustic Intensity 30 dB 20 dB 10 dB 0 dB 9
F USION O F M ULTI - ASPECT W ITH M ULTI - FOLDED V IEWS • Acquisition and processing of multiple data sets are needed to validate final results and to maximize confidence during data interpretation. • High-resolution, high-density, multi-aspect data acquisition (SAS), up to 20,000 data points to confirm true target signals from noise related inclusions. • Data is also collected at varying offset along two orthogonal lines (JYG-Cross) with a total of 5,800 traces to form the folds
12 m 12 m Plan View RS DE MAGING : B OUL OHAZARD I Profile View 3 m G E 3 m
I MAGING OF G AS IN S E DIME NT High Frequency Chirp Parametric Sonar PROFILE VIEW Gas PLAN VIEW
E NHANCING T HE S UB - SEABED S OIL P ROFILE : AC VS B OREHOLE ACOUSTIC CORE BOREHOLE Sub-Bottom Profile Data 40 m 40 m 14 m 0.1 m 500 m 500 m
R ESOLVES G EOTECHNICAL D ATA C ONFLICT : AC VS CPT Two adjacent cone penetrometer test (CPT) profiles produced different cone resistance results. CPT 2 CPT 1 HF Chirp Data Parametric Data Which CPT do we believe? Will a third CPT help? Results Acoustic Corer Image don’t provides the answer agree Early Termination CPT 1 hits hard gravel layer at 11m and terminates CPT 2 bypasses gravel bed
F Y - S IMPL YING I ION I O A NOMAL Y M APS INAL L IF NF ORMAT NT AC Cross –Section: Thinning Clay Layer Plan View of Anomalies
AC C ASE S T UDY : M IT ING R OR P IL E R IGAT ISK F E F USAL • 5 Offsho re Wind T urbine s mo unte d o n 4 le gge d platfo rm • Challenge: Co mplex So il - Bo ulder Clay with variable geo tec hnic al pro perties • Sc o pe o f Wo rk - De sk to p study o f e xisting ge o physic al and geo te c hnic al data - Phase 1: One AC at eac h o f the five platfo rm lo c atio ns - Statistic al analysis o f initial 5 AC results to assess risk o f bo ulders and ac c ess value o f expanding sc o pe - Phase 2: Sc o pe expansio n to an Ac o ustic Co re at eac h pile lo c atio n: to tal o f 20 AC’s - Statistic al analysis o f c o mbine d sc o pe to suppo rt mic ro -siting o f pile installatio n
G E OHAZARDS I MAGING AC 3D D AT A S E T – O N V E SSE L PROVILE VIEW PLAN VIEW Stratigraphy Boulders Boulder Clusters Dense Moraine at 6m &10m
I YING B OUL RS IN AN A NAMOL Y M AP DE NT IF DE Micro-siting pile location based on boulder distribution G EO -H AZARD P LANNED P ILE L OCATION Profile View Plan View Anomaly at depth of 16.8 m was within 1 meters of planned pile location: unacceptable risk - pile location adjusted
AC C OMME RCIAL T RACK R CORD : E UROPE , N ORT H A ME RICA , ME E Water Client Project Location Depth (M) ‘15 Deep Water Rhode Island Rhode Island 35 Wind Wind Farm TAP Extension Ormen Lange ‘14 ADMA Project Abu Dhabi 14 Installation ‘12 Conoco Ekofisk North Sea 60 Phillips Statoil Ormen Lange Norwegian Sea 22 -440 Siri Danish Dong Energy 60 (Phase 1 & 2) North Sea ‘11 Conoco Anholt Neart na Gaoithe Ekofisk North Sea 60 Phillips Ekofisk Siri ‘11 Conoco Gwent y Mor Eldfisk North Sea 60 Eldfisk Phillips Baltic 2 Helwin Borwin Hornsea Helwin/Borwin German Siemens 15 - 40 HVDC Substati North Sea EnBW Krieger Flak Baltic German 15 – 40 EnBW Baltic 2 Baltic 15 - 40 Mainstream Neart na Gaoithe Firth of Forth 40 Mainstream Hornsea North Sea 30 RWE Gwent y Mor Irish Sea 18 DONG Anholt Kattegat 25 Oil & Gas Renewables
M - V AL T A COUST IC C ORE UE P ROPOSIT R ION Offshore Wind Farm Rig Relocation • Reduce risk by sampling full Foundations site volume • Resolves conflict between physical cores and CPTs in complex seabeds. • Reduces the number of physical cores required Subsea Infrastructure and Excavated Drilling Centers Anchor Piling • Mitigates against cost overruns and schedule delays • Improved survey data reduces overall project risk High quality soil characterization, reducing subsea project risks and associated costs from pile refusals, slippages and punch-throughs
CONT ACT INF ORMAT ION Canada Business Development and Sales PanGeo Subsea sales@pangeosubsea.com 430-434 Water Street, St. John’s NL Canada A1C 1E2 Moya Cahill - President Phone: +1 709 739 8032 Ext. 224 mcahill@pangeosubsea.com Fax: +1 709 739 8035 United Kingdom PanGeo Subsea Scotland Ltd. 35 Regent Quay Aberdeen AB11 5BE United Kingdom Phone: +44 1224 766180 Fax: +44 1224 766181 www.pangeo subsea.c o m
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