Direct-Casing Spectral Noise Logging

Traditional noise logging relies on fluid-borne acoustics, which suffer from attenuation, multiphase flow turbulence, "stacking" of waveforms over distance, and suppression of small events by larger ones. These limitations often lead to uncertain interpretations, failed squeezes, rework, persistent SCVF/GM issues, methane emissions, and groundwater risks.

Reliance Oilfield Services Casing Vibration Tool (CVT) revolutionizes this. By mechanically coupling sensors directly to the casing, the CVT captures vibrations in the steel itself, where sound travels faster and with far less distortion than through wellbore fluid. This yields a cleaner, higher signal-to-noise ratio dataset, enabling precise identification of gas movement behind pipe, vent flows, channeling, and leaks at their source.

Paired with our proprietary visualization software, the CVT lets operators virtually "see" and "hear" what's happening behind the pipe, supporting faster, more confident decisions for remediation, zonal isolation, and permanent abandonment.

How the Casing Vibration Tool (CVT) Works:

Wireline Deployment: Wireline conveyed using our conventional, mast, or heli-portable wireline units (suitable for remote or low-access sites).

Direct Mechanical Coupling: Sensor contacts the casing ID magnetically to measure vibrations in the steel from gas/fluid movement behind the pipe.

High-Fidelity Capture: Modern electronics provide high-resolution sampling, low noise floor, and accurate depth correlation.

Data Conversion & Analysis: Vibrational signals convert to audible audio files + visual waveforms/spectrograms in Reliance proprietary software for easy review and interpretation.

Dry-Run Capability: Measures casing vibration (not fluid), so the tool runs effectively even in dry or low-fluid wells.

CVT vs. Conventional Fluid-Based Noise Tools

Feature

Reliance CVT (Direct Casing)

Conventional Fluid-Based Tools

Measurement Medium

Vibration of the casing steel

Acoustic energy in wellbore fluid

Signal Degradation

Zero wellbore fluid interference

Attenuation leading to multi-waveform stacking

Low-Amplitude Event Detection

High sensitivity to subtle events

Often suppressed or masked due to wellbore fluid saturation

Low-Flow / Subtle Scenarios

Superior detection and clarity

Lower fidelity

Run Conditions

Can run dry (measures casing, not fluid)

Requires stable fluid column

Key Benefits

Cleaner, Sharper Data: Higher signal-to-noise ratio and reduced interference for confident source pinpointing.

Superior Sensitivity: Detects small but critical anomalies without suppression by larger events.

Audio & Visual Clarity: Converts data to playable sound files + spectrograms/visualizations for intuitive evaluation.

Fast deployment: cuts time, costs, emissions, and footprint. Ideal for high-volume P&A (plug and abandonment) wells.

Regulatory Alignment: Provides verifiable, high-quality data for AER Directive 020 (Well Abandonment), Directive 080 (Well Logging), Saskatchewan PNG015, and BC guidelines, accelerating approvals and enhancing LMR/LLR profiles.

What the CVT Detects

Gas migration (GM)

Surface casing vent flow (SCVF)

Leak paths and behind-pipe communication

Casing integrity issues

Flow through perforations/restrictions

Annular movement and pressure communication

Post-remediation confirmation

With 24/7 logging specialists, in-house analysts, and a large regional wireline fleet, Reliance Oilfield Services delivers end-to-end solutions, turning complex SCVF/GM challenges into resolved liabilities faster and more reliably.

With 24/7 logging specialists, in-house analysts, and a large regional wireline fleet, Reliance Oilfield Services delivers end-to-end solutions, turning complex SCVF/GM challenges into resolved liabilities faster and more reliably.

Mission Zero

At Reliance, safety and responsibility are our primary objectives, that’s why our Mission Zero program is of utmost importance - respecting all of the organization’s stakeholders through proper environmental accountability, safety performance, social responsibility and corporate governance. Find out more about our Mission Zero program.

Contact Reliance To Get Started Today.

Mission Zero

At Reliance, safety and responsibility are our primary objectives, that’s why our Mission Zero program is of utmost importance - respecting all of the organization’s stakeholders through proper environmental accountability, safety performance, social responsibility and corporate governance. Find out more about our Mission Zero program.

Contact Reliance To Get Started Today.

Mission Zero

At Reliance, safety and responsibility are our primary objectives, that’s why our Mission Zero program is of utmost importance - respecting all of the organization’s stakeholders through proper environmental accountability, safety performance, social responsibility and corporate governance. Find out more about our Mission Zero program.

Contact Reliance To Get Started Today.

Reliance Oilfield Services
(ROFS Canada Ltd.)
#2500, 333 7 Avenue SW
Calgary, Alberta, T2P 2Z1

EDGE OFS
www.edgeofs.com

US Operations
www.reachwireline.com

Proudly part of the Edge OFS group — serving Canada through Reliance OFS and the U.S. through Reach Wireline.

Reliance Oilfield Services
(ROFS Canada Ltd.)
#2500, 333 7 Avenue SW
Calgary, Alberta, T2P 2Z1

EDGE OFS
www.edgeofs.com

US Operations
www.reachwireline.com

Proudly part of the Edge OFS group — serving Canada through Reliance OFS and the U.S. through Reach Wireline.

Reliance Oilfield Services
(ROFS Canada Ltd.)
#2500, 333 7 Avenue SW
Calgary, Alberta, T2P 2Z1

EDGE OFS
www.edgeofs.com

US Operations
www.reachwireline.com

Proudly part of the Edge OFS group — serving Canada through Reliance OFS and the U.S. through Reach Wireline.