How is directional sensitivity addressed when recording P-waves and S-waves on optical fiber?

A straight optical fiber exhibits maximum axial strain sensitivity along the cable trajectory. For near-surface engineering seismic surveys, multichannel analysis of surface waves (MASW), and recording vertical (Z) components of reflected P-waves, K-DAS deployments utilize helically wound optical cables (HWC) combined with a specialized high-SNR geophysical K-DAS modification featuring a spatial gauge length down to 0.2 m.

Does the K-DAS system support tailings dam monitoring under the GISTM standard?

Yes. The Global Industry Standard on Tailings Management (GISTM) requires transitioning from periodic manual inspections to continuous, real-time instrumental monitoring. An optical cable deployed along the crest, berm, or toe drain of a tailings dam operates 24/7 to detect microseismic acoustic emissions, internal piping (suffosion), hidden seepage zones, and subsurface shear plane formation well before visible surface deformations appear.

Can K-DAS use an existing telecommunication fiber cable already buried along a pipeline or railway?

Yes. For linear geohazard monitoring (landslides, mudflows, rockfalls, karst sinkholes, ground subsidence), the K-DAS interrogator connects to a single unused (dark) single-mode fiber (ITU-T G.652) inside an existing telecom cable without trenching or installing field hardware. For high-resolution seismic exploration and borehole VSP, optimal cable geometry and coupling are determined during the pre-engineering survey.

Where is K-DAS manufactured and how is its performance validated for a specific site?

K-DAS systems are designed and manufactured by Ksense LLP in Uralsk, Republic of Kazakhstan. The equipment is officially listed in the Register of Kazakhstani Commodity Producers (RKCP). Prior to full-scale rollout, Ksense LLP conducts a four-stage industrial pilot trial on the customer's site with synchronous reference sensor recording and classifier calibration.

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Fiber-Optic Geotechnical Monitoring, Geohazard Control & Seismic Exploration K-DAS

Continuous monitoring of tailings dams (GISTM), open-pit slopes, landslides, karst sinkholes, near-surface engineering seismics (down to 0.2 m gauge length), and borehole VSP

Unified K-DAS Fiber-Optic Platform for Geotechnics and Geophysics

Designed and manufactured by Ksense LLP (Uralsk, Republic of Kazakhstan) — registered in the Register of Kazakhstani Commodity Producers (RKCP / Реестр КТП)

Ksense LLP (Uralsk, Kazakhstan, registered in the Register of Kazakhstani Commodity Producers) develops and manufactures K-DAS coherent phase-sensitive optical time-domain reflectometers (Phase-OTDR) that transform standard telecommunication optical fiber (ITU-T G.652) into a continuous array of thousands of vibro-acoustic and seismic sensors. Depending on the application, the platform operates in two modes: 24/7 long-range geohazard monitoring across extended linear assets (tens of kilometers per optical channel) and a high-resolution geophysical K-DAS modification with a software-adjustable gauge length down to 0.2 m.

The optical cable along a pipeline right-of-way or inside a wellbore is completely passive: it requires no field power or battery replacements and is immune to electromagnetic interference, lightning strikes, high temperatures, and corrosive fluids. Specific range, spatial resolution, and localization accuracy parameters depend on system configuration, cable geometry (straight or helically wound fiber), and site geological conditions. Detailed technical specifications and optical budget calculations are provided upon request.

Downhole VSP Without
Production Downtime

Simultaneous full-wellbore seismic recording in a single source sweep without step-by-step wireline geophone clamping. Piggybacks with routine coiled tubing or DTS operations and enables permanent behind-casing 4D monitoring without well killing.
Standard G.652 Fiber
Without Specialty Cable

High spatial resolution is achieved on standard single-mode telecommunication fiber ITU-T G.652 (including existing dark fiber along rights-of-way and standard downhole cables) without procuring costly engineered fiber with artificial reflectors.
Continuous Profile
With Zero Blind Zones

A single optical cable replaces thousands of discrete point sensors. Unlike sparse grids of piezometers, inclinometers, or geophones (spaced 50–100 m apart), a continuous profile pinpoints internal piping, karst, or subsidence zones for targeted grouting instead of excavating tens of meters.
Rapid Deployment &
Field Safety (HSE)

Lightweight optical cable is deployed by a small engineering crew instead of days of manual geophone laying and battery maintenance. Zero field power along the line and reduced personnel exposure in hazardous open-pit, tailings dam, and wellpad zones.

Core Application Areas

From early warning of geotechnical and geohazard events to high-resolution engineering and borehole seismic surveys

Tailings Dam (GISTM) & Open-Pit Slope Monitoring

Continuous instrumental monitoring of mining hydraulic structures in compliance with the Global Industry Standard on Tailings Management (GISTM). Operating 24/7, the K-DAS system detects microseismic emissions, subsurface shear plane formation, internal piping (suffosion), and hidden seepage zones inside dam embankments and foundations well before surface breaches develop.

Engineering Benchmark of 5 Tailings Dam Monitoring Technologies under GISTM →

Linear Infrastructure Geohazard Control

Early detection of landslides, mudflows, rockfalls, ground subsidence, karst sinkholes, and permafrost degradation along trunk oil and gas pipelines (aligned with API RP 1160 and ASME B31.8S integrity frameworks), railways, and highways. Monitoring can utilize existing telecommunication fiber-optic cables already buried within the asset right-of-way.

Comparison of seismograms from classical geophones and the K-DAS fiber-optic system using straight and helically wound cables in engineering seismic surveys.

Near-Surface & Engineering Seismic Surveys (MASW)

The specialized geophysical modification of K-DAS features a software-adjustable gauge length (down to 0.2 m depending on survey objectives) and effective suppression of low-frequency environmental noise and interference fading zones. Support for helically wound optical cables (HWC) enables recording of both horizontal and vertical (Z) components of reflected P-waves on par with conventional geophones without spatial aliasing. Even on straight telecom cables, the system extracts surface-wave dispersion curves (MASW) for analyzing ground subsidence, karst voids, foundations, and permafrost degradation.

Vertical Seismic Profiling (VSP) & Downhole Noise Logging

The optical cable acts as a continuous seismic receiver array along the entire wellbore trajectory. The K-DAS system delivers high signal-to-noise ratio (SNR) and spatial receiver density unattainable with conventional wireline geophone strings, enabling shallow and walkaway VSP, downhole acoustic noise logging, and permanent 4D reservoir monitoring without deploying downhole electronics into high-temperature or corrosive wellbore zones.

Comparison of Vertical Seismic Profiling (VSP) seismograms: 5Hz geophone, straight fiber-optic cable, and ring-coiled K-DAS sensor.

Implementation Workflow & Industrial Pilot Trials

Because detection sensitivity and localization accuracy depend on local geology and cable deployment geometry, K-DAS implementation follows a four-stage engineering validation on the customer's site:

1. Pre-Engineering Survey & Fiber Route Audit

Assessment of site geological and geotechnical conditions, OTDR reflectometry of existing telecom fibers, selection of cable deployment geometry (straight, helically wound, or downhole), and optical budget calculation.
2. Synchronous Recording with Reference Instruments

Deployment of a pilot K-DAS loop on site and execution of control measurement series in parallel with the customer's reference geophones, seismic stations, or piezometers.
3. Gauge Length & Classifier Calibration

Software tuning of spatial resolution step, filtering of industrial background noise, and training of neural-network algorithms to recognize target geodynamic signatures.
4. SCADA / DCS Integration & Pilot Trial Protocol

Configuration of alarm and coordinate transmission into the customer's dispatch and geotechnical monitoring platforms via open protocols (OPC UA, Modbus TCP, REST API) and issuance of a formal Trial Protocol with verified metrics to support project financing.

Cooperation Formats for Asset Owners and Partners

Engineering support across the entire project lifecycle — from pre-engineering site assessment to industrial operation

For Mining, Oil & Gas & Infrastructure Operators:

Joint industrial pilot trials on the customer's site prior to investment commitment;
Turnkey K-DAS delivery, installation supervision, commissioning, and soil-specific classifier calibration;
Operator training and long-term lifecycle support with neural-network model refinement.

For Design Institutes, Geophysical & EPC Contractors:

Specification of equipment manufactured in Kazakhstan by Ksense LLP (registered in the Register of Kazakhstani Commodity Producers — RKCP) in FEED and tender documentation;
Engineering support during technical specification development, optical budget calculation, and existing fiber interfacing design;
Turnkey system supply or specialized commissioning and pilot trial subcontracting under main EPC contracts.

Request a Pilot Trial Program, Questionnaire, or K-DAS Technical Specifications

Contact the Ksense LLP engineering team to discuss your application, evaluate existing fiber routes, and calculate a system configuration for your site.

Request Pilot Program & Specs Contacts & Company Details

Frequently Asked Questions (FAQ)

Key engineering and operational considerations for deploying K-DAS fiber-optic sensing in geotechnical monitoring and seismic exploration

Conventional geophones, piezometers, and inclinometers are installed at discrete intervals (typically 50–100 m apart), leaving unmonitored blind zones between sensors and requiring individual power and telemetry wiring. The K-DAS system transforms a single standard optical fiber cable into a continuous array of thousands of distributed acoustic and seismic channels with a software-adjustable spatial step from 0.2 to 10 m along the entire route (up to 65 km per single arm / up to 130 km across two channels per interrogator unit) with zero field electronics.

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