Surface & Borehole Geophysical Data Interpretation
Surface and downhole geophysical methods provide non-intrusive and borehole-based information about subsurface conditions that cannot be directly observed. When properly interpreted and integrated with geological and hydrogeological data, geophysical information can significantly improve understanding of subsurface structure, material properties, and fluid distribution.
Third party review is most valuable when subsurface conditions are complex or heterogeneous and direct sampling is limited or impractical. AA GeoEnvironmental emphasizes multi-line-of-evidence interpretation, avoiding over-reliance on geophysical data in isolation.
Geophysical methods infer subsurface conditions by measuring physical property contrasts such as:
- Electrical resistivity and conductivity.
- Seismic velocity and wave attenuation.
- Magnetic susceptibility.
- Density and natural gamma response
- Neutron and porosity response.
AA GeoEnvironmental evaluates the translation of these physical measurements into geological and hydrogeological interpretations, taking into account the assumptions and limitations associated with each method.
We supports interpretation and review of geophysical datasets including, but not limited to:
Surface Geophysical Methods:
- Electrical resistivity and resistivity imaging.
- Seismic refraction and reflection.
- Electromagnetic methods.
- Ground-penetrating radar (GPR).
- Magnetic and gravity surveys (interpretive review).
Downhole and Borehole Geophysics:
- Natural gamma logs.
- Caliper and borehole diameter logs.
- Acoustic and optical televiewer logs.
- Heat Pulse Flow Meter, temperature, & fluid conductivity logs,
Our reviews examine the consistency of geophysical interpretations with site conditions and their proper constraints by ground-truth data. In addition, we evaluate:
- Resolution limits of geophysical methods.
- Ambiguities and non-unique interpretations.
- Sensitivity to survey design and processing assumptions.
- Appropriateness of conclusions drawn from the data.
What this Service Is
- Review and interpretation of geophysical data.
- Integration of geophysical results with geological and hydrogeological context.
- Identification of assumptions, uncertainty, and limitations.
- Support for defensible technical documentation.
What this Service Is Not
- Field geophysical data acquisition or equipment operation.
- Survey design or contractor oversight.
- Regulatory approval or certification.
Decisions regarding implementation, regulatory compliance, and data collection remain with the client.