Geophysical Survey Services

Geophysical Survey

LIA Engineering International deliver comprehensive marine geophysical survey services designed to support offshore engineering, energy, environmental and infrastructure projects at every stage of development. Our geophysical expertise combines high-quality data acquisition, advanced processing and detailed interpretation, providing clients with a clear understanding of seabed and sub-seabed conditions.

Operating in offshore, nearshore, coastal, river and inland water environments, we adapt our survey methodologies to site-specific conditions and project requirements. Our integrated approach allows us to identify potential risks, optimise route selection and support safe, efficient offshore operations.

Marine Geophysical Data Acquisition

Side Scan Sonar Surveys

Side Scan Sonar surveys are a core component of marine geophysical investigations, providing high-resolution acoustic imagery of the seabed. This technique allows detailed visualisation of seabed morphology, seabed features and objects resting on or slightly buried beneath the seabed.

By generating continuous and geo-referenced imagery, Side Scan Sonar surveys support accurate seabed mapping and interpretation, even in complex or dynamic environments.

Key capabilities:

  • Detailed seabed imaging and classification
  • Detection of natural and man-made features
  • Identification of seabed obstacles and debris

Typical applications:

  • Offshore cable and pipeline route surveys
  • Pre-lay, as-laid and as-built surveys
  • UXO and debris detection
  • Marine archaeological and environmental surveys
  • Seabed hazard identification

Sub-Bottom Profiling (SBP)

Sub-Bottom Profiling allows the investigation of shallow geological layers beneath the seabed, providing critical insight into sediment stratigraphy and subsurface features. SBP data are essential for understanding seabed composition, sediment thickness and shallow geological structures.

We use high-resolution sub-bottom profiling systems to deliver clear imaging of the sub-seabed, supporting both engineering and environmental studies.

Key capabilities:

  • Imaging of shallow subsurface stratigraphy
  • Identification of buried features and sediment layers
  • Improved understanding of seabed conditions

Typical applications:

  • Geohazard identification and assessment
  • Offshore foundation and ground condition studies
  • Route engineering and seabed characterisation
  • Environmental and geological assessments
  • Support to geotechnical investigations

Ultra-High Resolution 2D Seismic Surveys

Our Company provides 2D ultra-high resolution seismic surveys to image shallow subsurface structures with a high level of detail. These surveys offer enhanced penetration and resolution, enabling the identification of geological features that may affect offshore infrastructure and development.

Ultra-high resolution seismic data are particularly valuable for projects requiring a detailed ground model and risk assessment in shallow marine environments.

Key capabilities:

  • High-resolution imaging of shallow geology
  • Identification of geological structures and potential hazards
  • Support for engineering design and planning

Typical applications:

  • Offshore infrastructure and foundation planning
  • Oil & Gas and renewable energy developments
  • Shallow geological and geotechnical studies
  • Ground model development and validation

Integrated Geophysical Survey Applications

Our marine geophysical services support a wide range of offshore and nearshore applications. By integrating multiple datasets, we deliver a comprehensive and reliable interpretation of seabed and sub-seabed conditions.

Our surveys are commonly used for:

  • Geohazard assessment and mitigation
  • Offshore cable and pipeline surveys (pre-lay, as-laid, as-built)
  • Target detection and investigation (UXO, debris, wrecks)
  • Marine archaeological surveys
  • Environmental and habitat mapping
  • Oil & Gas and renewable energy projects
  • Port, harbour and coastal engineering works

Geophysical Data Processing & Interpretation

In addition to offshore data acquisition, we offer remote geophysical data processing and interpretation services. Our experienced geophysicists ensure that all datasets are processed to industry standards and interpreted with a project-oriented approach.

Our services include:

  • Advanced processing of geophysical datasets
  • Interpretation of Side Scan Sonar, Magnetometer, SBP and seismic data
  • Integrated mapping and reporting
  • Desktop studies and feasibility assessments

Deliverables are tailored to client needs and regulatory requirements, providing clear and actionable information for engineering, environmental and planning purposes.

Advanced Equipment & Technology

We utilise a wide range of state-of-the-art marine geophysical equipment, combined with precise positioning and navigation systems. This ensures accurate data acquisition, reliable target positioning and high-quality results in all operating conditions.

Our technology supports:

  • High-resolution seabed and sub-seabed imaging
  • Accurate geo-referencing of all datasets
  • Efficient operations in shallow and offshore environments

Why Choose Us

  • Extensive experience in marine and offshore geophysical surveys
  • Integrated acquisition, processing and interpretation services
  • Flexible solutions tailored to project-specific requirements
  • High standards of safety, quality and environmental compliance
  • Reliable support throughout all project phases