Pushing Boundaries, Delivering Solutions

Offshore Geoscience and Geotechnical Engineering Consultancy for the Oil and Gas industry

Feasibility and Site CharacterisationDesk Study & Survey ManagementDesk study - Experienced at identifying and mitigating risk at the most cost-effective stage, immediately increasing project value.

Survey management - Onshore and offshore staff experienced in the delivery of efficient and economic geophysical and geotechnical survey results.

Data Management & InterpretationData management & GIS - Combining the latest data management, GIS software and engineering expertise to maximise data value throughout the project life-cycle.

Interpretative reporting - Decades of experience in geophysics and geotechnical data integration and reporting to develop geological models and to manage seabed and near-shore risk for engineering design.

Foundation EngineeringFoundationsGeotechnical design - Extensive design experience in all types of geo-materials, and all offshore foundation types using in-house tools and software, and going beyond the codes where necessary.

Advanced numerical analysis - Geotechnical engineers proficient with 2D and 3D finite element analysis for structure-soil interaction, seismic and cyclic behaviour, and installation.

Mobile Offshore Units (MOPUs/MODUs)Jack-up operations - Leg penetration analysis using unique and powerful JACA software used by geotechnical specialists aware of geotechnical risks, and SITEVAL methodology.

Mudmat-supported units - Expertise and state-of-the-art tools provide reliable, certifiable solutions to complex geotechnical stability and design issues.

Our Services

Subsea Geotechnics Construction Support

Pipelines and Anchoring Pipelines and flowlines - Pipe/riser-soil interaction modelling levering in-house database of PSI parameters for axial, lateral and upheaval buckling resistance, and backfill engineering.

Anchoring and mooring - Basic or advanced holding capacity and anchor pile design, incorporating chain/wire-soil interaction, short-term and long-term behaviour of anchoring systems.

Pile Driving Monitoring Pile instrumentation - Operating under the G-Octopus banner, Cathie Associates has in excess of 15 years experience undertaking onshore and offshore pile testing, including underwater.

Interpretation - Highly trained specialists interpret and apply pile testing results to demonstrate pile capacity.

Subsea InfrastructureGeotechnics for SURF developments - Optimised foundation design for PLETS/PLEMs using latest research and installation experience (suction caissons, sliding foundations, mudmats, piles).

Soil-structure interaction - Specialist engineering for seismic design, impacts of geohazards on subsea facilities, seabed liquefaction risk.

InstallationFoundation installation - Expert at working with operators and contractors to optimise installation of piles, suction caissons and mudmats, and seabed excavations or interventions.

Trenching engineering - Industry leading experience in burial risk assessment, development of trencher and plough performance models (soil and rock), and performance database.

Pushing Boundaries, Delivering Solutions

Cathie AssociatesBrussels • Paris • Newcastle • London • Hamburg • Milan

www.cathie-associates.com

The leading specialist independent consultancy. One of the largest offshore geo-focused teams globally.

Geology and geophysics

Software

Geotechnics

Instrumentation

Cathie Associates are specialists in offshore geoscience and geotechnical engineering. We combine specialist knowledge and software to deliver survey, geophysical and geotechnical engineering solutions responsively. We can assist at all project stages from feasibility to decommissioning.

Cathie Associates are industry leaders and initiators in offshore geotechnics through research, university collaboration, in-house software developments, tools and databases:

Joint Industry Projects (JIPs): SAFEBUCK - lateral buckling of pipelines, Grillage foundations, ICE-PIPE Pipelines in cold climates, GEOWAVE – anchoring systems for wave energy devices, DYNDATA – database of dynamic pile test results.

Software development: OPILE – industry leading offshore pile design, CAISSON - suction pile design, VHM - mudmat design, JACA - jack up leg penetration, PILDEV - pile/conductor deviation analysis, CA Store.

Research and innovation: Probabilistic design assessments, cyclic loading effects on piles and suction caissons, RockMat foundations, use of dynamic FEA for interpretation of dynamic pile tests, trencher modelling, pipeline geotechnics.

Industry committees/technical panels: API RP2GEO/ISO 19901-4 Foundations; API RP2SK/ISO 19901-7 Anchors and moorings; ISO 19905-1 Jackups – foundations.