Marine Gravity and Magnetic Data Processing
GETECH has over 15 years experience of independent processing of ship-borne gravity and magnetic data, generally collected on seismic vessels. Our independent status offers the opportunity of critical quality control, survey analysis and survey design.
Full data processing and enhancement services are offered for all types of gravity and magnetic marine data. Innovative processing techniques are applied to maximise use of 1-second sampled gravity, navigation, horizontal accelerometers and other auxiliary data currently being recorded by today's leading dynamic gravity meter systems.
The key benefits that GETECH can bring to your gravity and magnetic exploration programmes are
- Independent QC
- Proven, stable Eötvös correlation
- Off-line processing to maximise data coverage
- Spectral micro-levelling
- Survey integration e.g. with satellite gravity
Recent Experience:
We have recently (2008) completed a 6-month work programme processing over 180,000 line kms of gravity and magnetic data over hydrocarbon basins in S E Asia.
Standard Processing sequence:
Gravity Data Reduction
- Cross-Correlation Analysis
- Base Constants Determination and Removal
- Incorporation of Bathymetry and Navigation Data
- Eötvös Correction
- Network Analysis and Line Adjustment
- Crossover Levelling Free-Air Correction - Network adjustmnent
- Spectral micro-levelling
- Bouguer Correction
Magnetic Data Reduction
- Position Correction for Magnetometer Offset
- IGRF Removal
- Removal of Diurnal and Transient Magnetic Events
- Incorporation of Bathymetry and Navigation Data
- Crossover Levelling - Network adjustmnent
- Spectral micro-levelling
Advanced processing services include:
- Integrating survey data with regional datasets, eg satellite gravity data
- Filtering, derivatives and transforms
- Interpretation
Before Levelling
After Levelling
