Murag

MURAG-20 II is a device for performing reservoir measurements at different wells and artificial lift systems in a client’s fields. The aim is to take these measurements with minimum work force effort, reducing HSE risks on site, and delivering high flexibility and therefore high levels of mobility.

MURAG-20 II measures and provide data output on:

  1. Bottomhole pressure
  2. Liquid level in wells annulus
  3. Casing head pressure
  4. Well acoustic profile

MURAG is one of RAGSOL’s unique data generation devices, designed especially for online reservoir monitoring. This fully automated and purely electronic unit is capable of measuring the bottomhole pressure and liquid level of a well in real time, in a cost efficient and interventionless manner.

Technical Data

Measuring range
30–6,000m
Measuring accuracy
+/- 3m
Measuring resolution
0.3m
Measurement drift
zero
Measurement rate
up to 1 minute
Ambient temperature
-20 to +50°C
Pressure rating
5,000psig
ATEX certification
certified
Output connection
4–20mA
Modbus TCP ethernet
Power supply
110–230VAC
Frequency
47 – 66 Hz

Frequently asked
questions

What is required for the installation of a MURAG-20 II at a well site?

MURAG-20 II is built by an operator for operators. The unit therefore only requires a surface connection to a well’s annulus – ideally no smaller than ½”. In addition, a power supply of 110 to 230 VAC at 50-60 Hz is required to power the unit. As it is designed to perform pressure build up curves, an independent power supply (e.g.: fuel cell) would also be suitable.  Due to its acoustic measurement principle a casing pressure of 0.5 barg (7 psig) is recommended. 

To summarize:

  • Mechanical connection ½” or greater
  • Power supply 110 to 230 VAC
  • Casing pressure 0.5 barg (7 psig)
How does MURAG-20 II handle foamy conditions?

In our own operations we distinguish between two types of foam:

Firstly, foam introduced by using chemicals (e.g.: foam sticks to support gas production) – in this case there is no liquid per se and therefore measurement is not possible. Second, ‘foam’ is generated by gas dissolving from the liquid. Here a liquid can be detected and a reliable measurement is likely. In the case of dissolving gas, it is important to understand if this process is the desired and preferred method. Foam does not represent any kind of challenge, especially in the context of pressure build up surveys.

What is the advantage of utilizing the liquid level to calculate bottomhole pressure?

Using a downhole gauge and its pressure to calculate fluid levels is a method that is often used in the oil and gas industry. In our experience the disadvantage of this method is that it requires a complex model. MURAG-20 II utilizes a sophisticated algorithm to derive bottomhole pressure from measured liquid level using just a few parameters. Again, as an operator, we try to eliminate room for error and simplify day-to-day operations.

What data transmission options are available with MURAG-20 II?

The MURAG in its current version is equipped with state-of-the-art GSM data transmission. In any case, ragsol always tries to find the best solution for their partners, depending on location, company regulations and user requirements. MURAG provides data output in 4 to 20 mA and Modbus TCP. This enables the operator to connect directly to a pump controller, SCADA systems or transfer the data via GSM or satellite. Whichever option is the best, all measured data is stored locally – nothing is lost. ragsol’s team is always working on new solutions. New developments can be found on our data transmission site.

Does MURAG-20 II require regular maintenance?

MURAG-20 II is maintenance-free. We suggest that the physical condition of the unit is checked from time to time. The unit provides a self-check on its condition, which is seen with each measurement.

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