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Fluid inflow detection

Silixa’s ArrayLog™ services utilise distributed acoustic (iDAS™) and distributed temperature (ULTIMA™ DTS) data to detect fluid entry points and determine fluid type. Recognising and characterising fluid inflow along the wellbore can lead to optimisation of the well performance.

Real-time visualisation of dynamic flowing conditions along the wellbore simultaneously

The iDAS and ULTIMA DTS can be deployed periodically to detect fluid entry points and determine fluid type by running a fibre optic log as either a slickline, cable or coil tubing intervention.

The optical fibre behaves as a sensor array making it possible to log the entire well path continuously without the need to move the cable and so providing information about dynamic flowing conditions in a way in which conventional sensors cannot.

Phase-coherent acoustic data for greater confidence

Distributed temperature data has been used in recognising gas entry for many years however its ability to measure liquid entries in horizontal wells is limited. The addition of phase-coherent distributed acoustic data (iDAS™) together with advanced acoustic processing creates greater confidence in recognising liquid entry.

Silixa leads the way in its unique combined approach that employs both temperature and acoustic data in inflow detect fluid inflow. Our proprietary computational models are able to differentiate between phases and quantify flow using acoustic and thermal properties of the produced fluids taking the multiphase fluid dynamics into account.

Actionable information derived from distributed acoustic and temperature measurements

Field software allows for real-time integrated visualisation of temperature and spectral acoustic data for quality control and initial evaluation while a post processing platform facilitates advanced data processing and versatile plotting options so that corroborating answers from independent measurements, iDAS™ and ULTIMA™ DTS, can be presented as actionable information to the user.

Silixa offers a range of fibre optic cables optimised for iDAS and DTS measurements to ensure a safe, efficient and long-lasting monitoring solution.


  • Water or Gas entry detection
  • Identify active vs. inactive production zones
  • Injection profiling
  • Flow régime identification
  • Production diagnostics


Flexible deployment

Data acquisition on either slickline, cable or coiled tubing intervention

Rapid identification of fluid entry points in much shorter time

As the fibre is the sensor, distributed acoustic and temperature data are acquired along the length of the fibre continuously. This eliminates the need for time and depth-matched logging and delivers reliable answers in much shorter time than conventional methods.

Reliable visualisation of changing production patterns

Unlike point sensors, our distributed sensing-based fluid in-flow monitoring solution delivers more accurate answers as it measures the acoustic and thermal profile along the fibre optic cable simultaneously. This enables us to describe changing production patterns.

Integrated data for confident decision making

Supporting answers from multiple measurements, including temperature and acoustic measurements, improves decision confidence

Well integrity “health-check” at no additional cost

To ensure the continuation of safe and reliable operations diagnosing well health issues is necessary. ArrayLog delivers reliable, high-resolution distributed acoustic and temperature data that provide greater confidence in well diagnostics, enabling more effective well management and risk mitigation. It does so at no additional cost. Read more on well integrity monitoring on our dedicated page.

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