PMRI Technology
Passive Mechanical Response Inversion
Deploy passive sensor arrays that extract seven independent data streams from a single deployment. Map density, velocity, porosity, and structure without drilling a single hole.
12
Completed Surveys
479
Sensors Deployed
6
US States
7
Data Streams per Sensor
Capabilities
What PMRI Delivers
Four core outputs from every deployment, each derived from independent physical measurements of the subsurface.
Density Mapping
Detect subsurface density anomalies associated with mineral deposits, hydrocarbon traps, salt structures, voids, and aquifers — all from surface-deployed passive sensors.
Velocity Profiling
Extract shear-wave velocity structure from ambient seismic noise to reveal layered geology, fault zones, cap rocks, and basement depth — no active sources required.
Porosity & Fluid Estimation
Estimate rock porosity and discriminate fluid types — gas, oil, brine, fresh water — using density contrasts and spectral signatures from the same sensor deployment.
3D Visualization
Interactive 3D subsurface models integrating all data streams — density anomalies, seismic velocity, porosity, structural trends — with ranked drill targets and confidence scores.
Process
How It Works
From sensor deployment to drill-ready deliverables in weeks to months, not years.
Deploy
Compact passive sensors are placed across the survey area in a grid pattern. No drilling, no active energy sources, no special permits required. Deployment takes hours, not weeks.
Record
Sensors continuously record Earth’s mechanical response and ambient vibrations for days to weeks. The longer the recording, the deeper and more detailed the analysis.
Process
AI-driven analysis extracts multiple independent data streams from the raw recordings. Each stream provides a different view of the subsurface — density, velocity, porosity, structure.
Deliver
Results are fused into interactive 3D models with ranked targets, confidence scores, drill recommendations, and geological reports ready for decision-making.
Applications
One Technology, Multiple Resource Types
The same sensor deployment and processing platform adapts to any subsurface exploration challenge.
Oil & Gas Exploration
Hydrocarbon traps, structural closures, reservoir characterization
Critical Minerals
Gold, copper, silver, lithium, rare earth element detection
Water & Aquifer Mapping
Aquifer boundaries, water quality zones, contaminant pathways
Geothermal Reservoirs
Heat source mapping, fault conduit identification, resource sizing
Salt Dome Detection
Dome geometry, cap rock confirmation, associated trap identification
Void & Cave Mapping
Underground voids, lava tubes, karst features, subsidence risk
Hydrogen & Helium
Fault conduit mapping, seal integrity, source rock characterization
Fault & Structure Mapping
Regional fault systems, fracture corridors, basement architecture
Advantages
Why PMRI
Completely Passive
No drilling, no explosives, no active energy sources. Sensors record the Earth’s natural signals. No special permits required for deployment.
Seven Data Streams
Each sensor yields seven independent measurements — density, seismic velocity, porosity, three-component directional analysis, phase, spectral, and machine learning classification.
Proven & Validated
Deployed across 12 surveys in 6 US states. Cross-validated against known geology, historical well data, and independent geophysical methods.
See the Results
Explore our track record across 12 completed surveys with independently validated results.