Novel Production Optimisation Technologies

What is HydraCHEK?

HydraCHEK is an indispensable advanced and user-friendly solution for precise and efficient measurement of hydrate inhibitor and salt concentrations in produced water samples. With its unprecedented features it has been widely deployed in various fields, ensuring safety of operations by monitoring the hydrate phase boundary and generating substantial cost savings through optimizing inhibitor usage and extending field life for clients globally. Backed by rigorous field testing, it offers robust calibrations for detecting different hydrate inhibitors and salt compositions, making it a trusted choice for major operators globally.

The technology which was key to Heriot-Watt Institute of GeoEnergy Engineering winning the Queen’s Anniversary Prize (2015), takes advantage of state-of-the-art hardware and software, seamlessly integrating them into a user-friendly design. With precise measurements and quick analysis taking less than 30 seconds, HydraCHEK enables informed decision-making and operational optimization. Its ready-to-use calibrations cover a range of hydrate inhibitors and salts, and no sample preparation or consumables are required

Why use HydraCHEK?

HydraCHEK has been extensively tested in the field and has been proven to develop robust calibrations for detecting different hydrate inhibitors and salt.

Ultimately, HydraCHEK is an economically ideal solution to the excessive hydrate inhibition issue and that is why it is in everyday use by major operators around the globe.

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Watch Professor Bahman Tohidi Explain HydraCHEK Capabilities

Advantages of HydraCHEK

The HydraCHEK system offers a wide range of benefits to our clients

Benefit from hydrate safety margin monitoring

The actual hydrate phase boundary can be determined for a system during operation when using thermodynamic hydrate inhibitors. HydraCHEK is used to measure the hydrate inhibitor and salt concentration in the produced water, which along with the hydrocarbon fluid composition can be input into a thermodynamic model to give the hydrate phase boundary (see our hydrate prediction software HydraFLASH). The operating conditions can then be used to determine the hydrate safety margin indicating how well protected a system is from the risk of hydrate formation.


Proven Technology

HydraCHEK measures the acoustic velocity and electrical conductivity of a produced water sample and an artificial neural network (ANN) is used to develop robust calibrations for detecting different hydrate inhibitors and salt. The technology has been extensively tested in the field and is in everyday use by major operators around the world.

Quick and User-friendly

A typical analysis takes less than 30 seconds and no sample preparation is usually required. HydraCHEK also doesn't need any chemicals or consumables to run a test, making it very straightforward to use.

Lower inhibitor Capital Expenditure and Operating Expenditure costs

Hydrate remediation strategies often involve excessive dosing of hydrate inhibitor, which results in unnecessarily high CAPEX and OPEX costs. HydraCHEK can be used to optimise inhibitor injection rates by providing both a quick and easy way of measuring the degree of inhibition of a system and a means to monitor the effect of lowering the dosage over time.

Ready-to-use calibrations

HydraCHEK has been calibrated with a number of different hydrate inhibitors including thermodynamic inhibitors (MEG, Methanol, Ethanol), Kinetic Hydrate Inhibitors (KHI's) and Anti-Agglomerants (AA's).

Relevant measurement range

All the results are in the mass% range for both hydrate inhibitors and salt, with an effective measurement range of between 0-100 mass% for hydrate inhibitors depending upon the calibration.


How can HydraCHEK measure both salt and hydrate inhibitor concentrations simultaneously?

HydraCHEK measures two independent physical parameters; the speed of sound and the electrical conductivity to determine two unknown parameters; hydrate inhibitor and salt concentration. The measured speed of sound and electrical conductivity of a sample are input into an artificial neural network correlation that allows both the salt and inhibitor concentration to be determined.


With HydraCHEK measuring hydrate inhibitor and salt concentration is as easy as 1-2-3:

  1. Fill the measuring cell with sample fluid
  2. Open HydraCHEK app
  3. Click Run and get results displayed within 5 second

The data generated by HydraCHEK can be fed into the HydraFLASH model engine, yielding the actual phase boundary of the system relative to operation conditions at a given point in time, facilitating continuous inhibitor dosage optimisation.

Equipment Demo & Sample Test

In this demonstration, Operations Manager Dr. Mohsen Hoopanah shows us the latest version of HydraCHEK's equipment, and runs a sample test to demonstrate the process in conjunction with our HydraFLASH software.

HydraCHEK: An Easy Process

Ever wondered if it would truly be worth getting HydraCHEK for your operations? This video explains just how quick and easy it is to measure the concentration of hydrate inhibitor and salt in produced water samples taken from a pipeline... all from your own lab, or even your desk!


Get the answers to common questions about HydraCHEK

Has HydraCHEK been tested in the field?

We have done extensive testing and evaluation of the device under field conditions in both onshore and offshore laboratories around the world. A number of leading operators and service companies have trialed the technology including Total, Statoil, Dolphin Energy, Petronas, NIGC and Champion Technologies.

What is the accuracy of HydraCHEK?

Measurement accuracy with > 95% Confidence in the results for:

  • Thermodynamic hydrate inhibitor concentration = ± 0.2 mass%
  • Kinetic hydrate inhibitor concentration = ± 0.1 mass%
  • Salt concentration = ± 0.1 mass%
Does HydraCHEK need to be calibrated for each production system we have?

If a calibration already exists for the hydrate inhibitor and salt to be measured then the system can be deployed immediately and no adjustments are necessary. For example we have already developed HydraCHEK calibrations for the main thermodynamic hydrate inhibitors (Methanol, MEG, Ethanol), which can be used to detect the inhibitor and salt concentration for any production system, provided the concentrations are within the measurement range of the device and calibration.

HydraCHEK only requires calibrating for a system if we have not developed a calibration for the hydrate inhibitor to be detected i.e. a new KHI formulation.

What is the effect of fouling due to solids, sand, oil in water etc. on the measurement?

The impact on the results will depend on the type and severity of the fouling, however for most cases we have found a simple filtration of the produced water sample is enough to make any effect negligible.

Has it been tested in an environment where hydrocarbons i.e. crude oil or condensate is present?

To achieve the best possible accuracy it is preferable to have a hydrocarbon free water sample before analysis however our testing has found that small amounts of hydrocarbons present will not affect the measurement as the device is looking at the bulk of the sample.

Does the temperature or pressure of the sample affect the measurement?

HydraCHEK samples can only analysed at ambient pressure so this factor is not important. Temperature can be problematic if samples are heating up or cooling down while the measurement is being carried out so should always be allowed to reach ambient temperature before analysing.

How does the presence of other production chemicals such as scale and corrosion inhibitor affect the results?

Most oilfield chemicals are injected in very small quantities (orders of magnitude difference) when compared with hydrate inhibitors so their effect can generally be considered negligible.

Will the presence of other salts affect the measurement?

HydraCHEK measures the NaCl concentration and considers all other salts present as NaCl. The resulting value is however equivalent to the combined concentration of all salts present. The majority of produced water systems are NaCl dominated and as such the salt measurements are representative. If ion ratios are known for a system a simple conversion from the HydraCHEK measurement can be used to estimate the concentration of each ion.

How is your salt concentration determined?

HydraCHEK measures both the electrical conductivity and speed of sound of the aqueous phase. The measurement of conductivity is very sensitive to the concentration of salt in solution however the overall measurement of salt concentration for a sample is a combination of both speed of sound and conductivity.

Is this a membrane type of measurement?

No. HydraCHEK measures the electrical conductivity and speed of sound of a produced water sample

Is the measurement similar to that of a TDS meter (total dissolved solids)?

It is similar, but not the same. TDS may include fine solid particles in addition to salts whereas the HydraCHEK salt measurement will not be affected by these solids.

Do you measure ionic strength via the conductivity measurement?

No, because in order to measure ionic strength we would need to know the concentrations of all ionic components. This would be problematic in field conditions where salt concentrations are fluctuating over time.

HydraCHEK™ Download Center

Access additional information about Hydrafact ltd.

Monitoring and Optimising KHI Injection - Dolphin Energy Ltd. Qatar   [Download] +

Field Application for MEG System - NIGC, South Pars Gas Complex   [Download] +

Extending the life of the NUGGETS Field - Total E&P UK, North Sea   [Download] +

Optimising Methanol Injection - Total E&P UK, North Sea   [Download] +

Minimizing Hydrate Inhibitor Injection Rates   [Download] +

HydraCHECK Case Studies   [Download] +

Monitoring Hydrate Safety Margin - ICGH 2011   [Download] +

Hydrate Inhibition Monitoring System - Touch Briefings OIl & Gas Review Vol 9/Issue 1   [Download] +

Monitoring Hydrate Safety Margin - SPE 2011   [Download] +